CN110501215B - Implanted prosthesis test piece and retention force tensile experimental device and experimental method thereof - Google Patents
Implanted prosthesis test piece and retention force tensile experimental device and experimental method thereof Download PDFInfo
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- CN110501215B CN110501215B CN201910786504.3A CN201910786504A CN110501215B CN 110501215 B CN110501215 B CN 110501215B CN 201910786504 A CN201910786504 A CN 201910786504A CN 110501215 B CN110501215 B CN 110501215B
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The embodiment of the application provides a planted prosthesis test piece, a planted prosthesis test piece retention force experimental device and an experimental method for testing retention force by using the experimental device. The experimental device comprises: the lower clamping piece comprises a first clamping part matched with the tensile testing machine and a first installation part embedded with the implant substitute body; the bonding retention abutment is fixedly connected with the implant substitute; the implant restoration test piece is provided with a jack for sleeving with the bonding retention abutment, and a bonding agent gap is formed between the implant restoration test piece and the abutment after the implant restoration test piece is sleeved on the periphery of the bonding retention abutment; the outer side surface of the implant prosthesis test piece is provided with a preset axial surface taper; an upper clamping piece which comprises a second clamping part and a second mounting part; the second installation part is provided with a clamping groove, and the clamping groove is provided with a clamping surface with the same taper as the axial surface of the implant prosthesis test piece. The method and the device can avoid the design defects of the existing planting restoration body tensile experiment test piece, and reduce experiment errors.
Description
Technical Field
The invention relates to the field of basic research of oral implant science, in particular to a implant prosthesis test piece, a retention force tensile experimental device and an experimental method thereof.
Background
In the current series of related researches on the retention force of the implanted prosthesis, the main method adopted by researchers is an in-vitro tensile test or a fatigue test. The existing tensile test piece designs are mainly divided into the following types.
The first is to implant a prosthesis
And a metal ring is cast on the surface and then connected with a tensile testing machine through a hook. Such designs suffer from the following disadvantages: 1.
the design of the surface casting metal ring influences the control of the pressure when the implant restoration body is bonded with the implant substitute body; 2. the casting technology can not process the zirconia all-ceramic crown which is commonly used in clinic at present, and is not close to clinic.
And the second mode is that the upper clamp of the tensile testing machine is fixed by utilizing the undercut of the axial surface of the implanted prosthesis. The design is difficult to ensure that the contact points of the clamping end and the implanted prosthesis are completely consistent during each loading, the stress on two sides is unbalanced, the measured value is greatly influenced during dislocation, and the experimental error is uncontrollable.
Thirdly, the appearance of the implanted prosthesis is designed into a shape (such as a cylinder, a cuboid and the like) which can be directly clamped, and an upper clamp does not need to be manufactured by a tensile testing machine. In the design, during the experiment, the upper clamp of the tensile testing machine directly clamps and plants the prosthesis. When the design is used for experiments, the force of the upper clamp for directly clamping is difficult to control, the upper central line and the lower central line required by a laboratory are completely overlapped and difficult to guarantee, and the error of the experimental result is large.
Disclosure of Invention
The embodiment of the application aims to provide a fixture force tensile experimental device for a plant prosthesis test piece, a plant prosthesis test piece suitable for the experimental device and an experimental method for testing fixture force by using the experimental device, wherein the design defects of the conventional plant prosthesis tensile experimental test piece are overcome, and experimental result errors can be reduced.
The embodiment of the application provides a prosthesis retention capacity experimental apparatus is planted to bonding retention formula, includes:
the lower clamping piece comprises a first clamping part matched with the tensile testing machine and a first installation part embedded with the implant substitute body;
the bonding retention abutment is fixedly connected with the implant substitute;
the implant restoration test piece is provided with a jack for being sleeved with the bonding retention abutment, and a binder gap is formed between the implant restoration test piece and the bonding retention abutment after the implant restoration test piece is sleeved on the periphery of the bonding retention abutment; the outer side surface of the implant prosthesis test piece is provided with a preset axial surface taper;
the upper clamping piece comprises a second clamping part matched with the tensile testing machine and a second mounting part used for clamping and fixing the implant prosthesis test piece; and a clamping groove is arranged on the second mounting part, and a clamping surface with the same taper as the axial surface of the implant prosthesis test piece is configured on the clamping groove.
In the above-mentioned realization process, lower holder and last holder all include with the clamping part of tensile test machine adaptation, then tensile test machine can carry out even centre gripping to holder and last holder down, the strength of centre gripping can evenly be controlled, it is firm to contact, does benefit to the experiment and stably goes on. The implant substitute is pre-buried on the first installation part of the lower clamping piece, namely the position of the implant substitute is fixed, the bonding retention abutment is fixed on the implant substitute through screws, and the installation position of the bonding retention abutment is fixed every time. Meanwhile, the gap between the bonding retention abutment and the implant restoration test piece is bonded by the internal adhesive, and the gap is controlled by computer processing, so that the bonding between the implant restoration test piece and the bonding retention abutment is more uniform, and the experimental result is more accurate. When a tension test is carried out, the implant restoration test piece is fixed on the clamping groove, the clamping groove is provided with a clamping surface with the same taper as the axial surface of the implant restoration test piece, the clamping surface of the implant restoration test piece is attached to the clamping surface of the clamping groove, the clamping surface of the implant restoration test piece is uniformly stressed, the influence on the measured value when the implant restoration test piece is dislocated is small, and the experimental error is reduced.
Further, when the bonding retention abutment is fixed on the implant substitute and the implant prosthesis test piece is sleeved on the bonding retention abutment, the centers of the implant substitute, the bonding retention abutment and the lower clamping piece are superposed; and
when the implant prosthesis test piece is clamped and fixed on the second mounting part, the center of the upper clamping piece is superposed with the center of the implant prosthesis test piece.
In the above implementation, the center of the implant substitute and the bonded fixture coincides with the center of the lower holder, that is, the implant substitute is fixed at the center of the lower holder. When the bonding retention abutment is sleeved on the implant substitute, the bonding retention abutment is also positioned at the center of the lower clamping piece. When the implant prosthesis test piece is clamped and fixed on the second mounting part, the center of the upper clamping piece is superposed with the center of the implant prosthesis test piece. Namely, after the experimental device is installed, the centers of the upper clamping piece, the implanted prosthesis test piece and the lower clamping piece are superposed. The device can ensure that the position of the implanted prosthesis test piece is fixed and unchanged in each experiment, the repeatability of the retention force experiment is good on the basis of the design, and the error of the experiment result is small.
In a possible implementation manner, the second mounting portion includes two inclined engaging surfaces arranged oppositely, and the two inclined engaging surfaces form a clamping groove with an inverted trapezoid cross section.
In the implementation process, the end face, far away from the first clamping part, of the second installation part is provided with a counter bore with an inverted trapezoid cross section so as to form two oppositely arranged inclined clamping faces, and the structure is simple and easy to implement. The clamping position is symmetrical about the central section of the upper clamping piece, so that the clamping force of the upper clamping piece on the implant prosthesis test piece is uniform, and the experimental error is further reduced.
In a possible implementation mode, the first clamping part and the second clamping part are both of a flat plate structure, so that the tensile testing machine is easy to clamp, and meanwhile, the first clamping part and the second clamping part are the same in thickness and beneficial to the superposition positioning of the upper clamping part and the lower clamping part.
According to another aspect of the present invention, there is provided a implant prosthesis test piece comprising an inverted frustum-shaped base having a predetermined axial taper; the reverse truncated cone-shaped base body is provided with a jack matched with the bonding retention abutment in the experimental device, and the jack partially faces the upper bottom surface direction from the lower bottom surface of the reverse truncated cone-shaped base body or penetrates through the reverse truncated cone-shaped base body.
The rounded off-set base most closely conforms to the shape of the crown. In the implementation process, the shape of the inverted frustum-shaped base body is regular, the base body can be accurately designed and manufactured through a computer, and parameters such as the tissue surface shape of the implanted prosthesis test piece, the adhesive gap between the implanted prosthesis test piece and the bonding retention abutment and the like are easy to control. The side surface of the inverted circular truncated cone-shaped base body has a smooth contact surface and is easy to match with the clamping groove, and when the clamping groove is provided with a clamping surface with the same axial surface taper as the implant prosthesis test piece, the side surface of the implant prosthesis test piece can be completely attached to the clamping surface of the clamping groove, so that the implant prosthesis test piece can be firmly clamped on the upper clamping piece in the experimental process. Meanwhile, the inverted frustum-shaped base body is easy to realize the center coincidence of the upper clamping piece, the implanted prosthesis test piece and the lower clamping piece.
Exemplarily, the axial plane taper of the implant prosthesis test piece is 10-20 degrees. The axial taper of the primary crowns is typically in the range of 10-20 degrees. The axial surface taper of the implant prosthesis test piece is set to be 10-20 degrees, and the experimental result is more accurate.
In one possible implementation manner, the upper bottom surface of the implant prosthesis test piece is a plane. In the implementation process, the upper bottom surface of the implant prosthesis test piece is a plane, so that the pressure of the bonding retention abutment and the implant prosthesis during bonding can be conveniently controlled, and the pressure can be applied to the upper bottom surface through a pressure tester or a weight.
According to another aspect of the present invention, there is also provided an experimental method for performing the retention force of the bonded retention type implant prosthesis by using the experimental apparatus, comprising the following steps:
adhering a plant restoration test piece to the adhesion retention abutment, after the adhesive is completely cured, vertically pressurizing the plant restoration test piece for a preset time by using a weight, and after the pressurization is finished, placing the plant restoration test piece in a constant-temperature water bath for a preset time;
placing the implant prosthesis test piece in the clamping groove, and respectively fixing the first clamping part of the lower clamping piece and the second clamping part of the upper clamping piece on the tensile testing machine;
setting the running loading speed of the tensile testing machine, recording the maximum load value of the implant prosthesis test piece and the bonding retention abutment in the dislocation process so as to represent the retention force of the implant prosthesis test piece, and storing retention force data.
In one possible implementation, the upper clamping member and the lower clamping member are manufactured by 3D printing.
According to the technical scheme, when the tension experiment is carried out, the implant restoration test piece is fixed on the clamping groove, the clamping groove is provided with the clamping surface with the same taper as the axial surface of the implant restoration test piece, the clamping surface of the implant restoration test piece is attached to the clamping surface of the clamping groove, the stress on the clamping surface of the implant restoration test piece is uniform, the influence on the measured value when the implant restoration test piece is dislocated is small, and the experiment error is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of an adhesion fixation type implanted prosthesis retention force experimental apparatus provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a lower clamping member according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a lower fixture for mounting an adhesive retention abutment according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of a implant prosthesis test piece according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an upper clamping member according to an embodiment of the present application.
Icon: 100-a lower clamp; 110-a first clamping portion; 120-a first mounting portion; 130-implant substitute; 140-a groove; 200-bonding retention abutment; 300-planting a prosthesis test piece; 310-a jack; 400-an upper clamp; 410-a second grip; 420-a second mounting portion; 430-card slot; 431-engaging surface.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an experimental apparatus for a retaining force of an adhesion-retaining implant prosthesis according to an embodiment of the present application. The experimental device comprises a lower clamping piece 100, an adhesive retention abutment 200, an implant prosthesis test piece 300 and an upper clamping piece 400.
Fig. 2 is a schematic structural diagram of a lower clamping member according to an embodiment of the present application. Referring to fig. 2, the lower clip 100 includes a first clip portion 110 and a first mounting portion 120. The first clamping portion 110 is adapted to the tensile testing machine. The first mounting portion 120 is buried with an implant substitute 130. The lower clamping end is provided with a groove 140 according to the size of the implant substitute 130, the implant substitute 130 is wrapped with resin materials and is inserted into the groove 140, and after the resin is cured, the implant substitute 130 is embedded in the lower clamping member 100. The structure of the implant substitute 130 is not particularly limited in this application, and any structure may be embedded in the first mounting portion 120 of the lower clamping member 100 and plays a role in fixing. Optionally, the implant substitute 130 in the present application is of the conventional diameter of the star anise system model zeeman (RN)
) The implant substitute of (1).
In the present application, the dimensions of the cemented retained abutment and the implant substitute are predetermined for the implant system, and include the length of the fixed connection portion between the cemented retained abutment and the implant substitute, the height of the cemented retained abutment, the length of the implant substitute, and the like. In the experimental process, corresponding selection can be carried out according to the experimental condition.
Fig. 3 is a schematic structural view of a lower fixture for mounting an adhesive retained abutment according to an embodiment of the present application. Referring to fig. 3, the bonded retention abutment 200 is used to be fixedly coupled to the implant substitute 130. When the bonded fixture 200 is fixed to the implant substitute 130, the bonded fixture extends a predetermined length in a direction opposite to the first clamping portion 110. Illustratively, the bonded fixture 200 is fixed to the implant substitute 130 by a central screw.
Fig. 4 is a schematic structural diagram of an implant prosthesis test piece according to an embodiment of the present application. Referring to fig. 4, the implant prosthesis trial 300 has a predetermined axial taper and is provided with a socket 310 for receiving the fixture 200.
Fig. 5 is a schematic structural diagram of an upper clamping member according to an embodiment of the present application. Referring to fig. 5, the upper clamp 400 includes a second clamping portion 410 adapted to the tensile testing machine, and a second mounting portion 420 for clamping and fixing the implant prosthesis test piece 300. The second mounting part 420 is provided with a clamping groove 430, and the clamping groove 430 is provided with a clamping surface 431 with the same axial surface taper as that of the implant prosthesis test piece 300.
In the implant prosthesis retention force experimental apparatus in this application, lower holder 100 and last holder 400 all include with the clamping part of tensile test machine adaptation, then tensile test machine can carry out even centre gripping to lower holder 100 and last holder 400, the strength of centre gripping can evenly be controlled, it is firm to contact, does benefit to the experiment and stably goes on.
The implant substitute 130 is pre-embedded in the first mounting portion 120 of the lower clamp 100, that is, the position of the implant substitute 130 is fixed, and the bonded fixture 200 is sleeved on the implant substitute 130, so that the mounting position of the bonded fixture 200 is fixed each time. Meanwhile, the bonding retention abutment and the implant prosthesis test piece 300 are bonded through the gap between the bonding retention abutment and the implant prosthesis test piece 300 through the internal adhesive, and the numerical value of the gap is controlled through computer processing, so that the distance between the outer surface of the bonding retention abutment and each point of the inner wall of the implant prosthesis test piece 300 is uniform, the bonding between the implant prosthesis test piece 300 and the bonding retention abutment 200 is uniform, and the experimental result is more accurate.
The second mounting part 420 of the upper clamping piece 400 is provided with a clamping groove 430, and the clamping groove 430 is provided with a clamping surface 431 with the same axial surface taper as that of the implant prosthesis test piece 300. During the experiment, the implant prosthesis test piece 300 is fixed on the clamping groove 430, and as the clamping groove 430 is provided with the clamping surface 431 with the same axial surface taper as that of the implant prosthesis test piece 300, the clamping surface of the implant prosthesis test piece 300 is attached to the clamping surface 431 of the clamping groove 430, so that the clamping surface of the implant prosthesis test piece 300 is uniformly stressed, the influence on the measured value of the implant prosthesis test piece 300 during dislocation is small, and the experiment error is correspondingly reduced.
Therefore, the implant prosthesis retention force experimental device can avoid the design defects of the existing implant prosthesis tensile experiment test piece and reduce the experimental result error.
Illustratively, in the present application, the lower clamp 100 and the upper clamp 400 are designed and manufactured with a SolidWorks2017 software and a 3D printer.
As an embodiment, when the bonded retention abutment 200 is fixed to the implant substitute 130 and the implant prosthesis test piece 300 is fitted over the bonded retention abutment 200, the centers of the implant substitute 130, the bonded retention abutment, and the lower fixture 100 coincide with each other; and when the implant prosthesis test piece 300 is clamped to the second mounting part 420, the center of the upper clamping piece 400 coincides with the center of the implant prosthesis test piece 300.
In the above implementation, the center of the implant substitute 130 and the bonded fixture coincides with the center of the lower clamp 100, that is, the implant substitute 130 is fixed at the center of the lower clamp 100. When the bonded fixture is fitted over the implant substitute 130, the bonded fixture is also located at the center of the lower fixture 100. When the implant prosthesis test piece 300 is clamped to the second mounting part 420, the center of the upper clamp 400 coincides with the center of the implant prosthesis test piece 300. That is, after the experimental device is installed, the centers of the upper clamping member 400, the implant prosthesis test piece 300 and the lower clamping member 100 are overlapped. The arrangement can ensure that the position of the implant prosthesis test piece 300 is fixed and unchanged in each experiment, the repeatability of the retention force experiment is good on the basis of the design, and the error of the experiment result is small.
In one possible implementation, the implant prosthesis test piece 300 includes an inverted truncated cone-shaped base, and the insertion hole 310 penetrates through the inverted truncated cone-shaped base partially or completely from the lower bottom surface to the upper bottom surface of the inverted truncated cone-shaped base.
The rounded off-set base most closely conforms to the shape of the crown. In the implementation process, the implant prosthesis test piece 300 adopts an inverted frustum-shaped matrix, the shape of the matrix is regular, the matrix can be accurately designed and manufactured through a computer, and parameters such as the tissue surface shape of the implant prosthesis test piece 300 and the adhesive gap between the implant prosthesis test piece and the implant substitute 130 are easy to control. The side surface of the base body is inverted to form a smooth contact surface, so that the base body is easy to match with the clamping groove 430, when the clamping groove 430 is provided with the clamping surface 431 with the same axial surface taper as the implant prosthesis test piece 300, the side surface of the implant prosthesis test piece 300 can be completely attached to the clamping surface 431 of the clamping groove 430, and therefore the implant prosthesis test piece 300 can be firmly clamped on the upper clamping piece 400 in the experimental process. Meanwhile, the inverted frustum-shaped base body can easily realize the center coincidence of the upper clamping piece 400, the implant prosthesis test piece 300 and the lower clamping piece 100.
In the present application, the implant prosthesis test piece 300 is processed by CAD (Computer Aided Design)/CAM (Computer Aided manufacturing), which can improve the accuracy and is more close to clinical practice than cast implant prosthesis. Specifically, the implant prosthesis test piece 300 is scanned on a 3Shape model scanning platform, and the obtained Shape data of the implant prosthesis test piece 300 is recorded into CAD software; and scanning (powder spraying) the bonded fixture 200 on a 3Shape model scanning stage, and recording the profile data of the bonded fixture into the CAD software. The implant prosthesis is designed in the CAD software by using the shape data of the implant prosthesis test piece 300 and the shape data of the bonded retention abutment.
In one possible implementation, the second mounting portion 420 includes two oppositely disposed inclined engaging surfaces 431, and the two inclined engaging surfaces 431 form a slot 430 with an inverted trapezoidal cross section.
In the implementation process, a counter bore with an inverted trapezoid cross section is formed in the end face of the second mounting portion 420 away from the first clamping portion 110 to form two inclined engaging faces 431 which are oppositely arranged. The opening of the counter bore faces to the implant prosthesis test piece 300, the depth of the counter bore is larger than the height of the implant prosthesis test piece 300, the diameter of the upper bottom surface of the inverted frustum-shaped implant prosthesis test piece 300 is smaller than the length of the upper bottom of the inverted trapezoid-shaped counter bore, and the diameter of the lower bottom surface of the inverted frustum-shaped implant prosthesis test piece 300 is larger than the length of the lower bottom of the inverted trapezoid-shaped counter bore. The movement allowance of the implant prosthesis test piece 300 is reserved in the counter bore, when the implant prosthesis test piece 300 is installed in the clamping groove 430, the implant prosthesis test piece 300 can penetrate into the clamping groove 430 along the thickness direction of the first installation part 120 only by lifting the implant prosthesis test piece 300 to the position where the width between the two inclined clamping surfaces 431 is larger than the diameter of the lower bottom surface of the implant prosthesis test piece 300. After the center of the implant prosthesis test piece 300 is aligned with the center of the upper clamping piece 400, the implant prosthesis test piece 300 is loosened, and the side surface of the implant prosthesis test piece 300 is clamped with the inclined plane in the clamping groove 430. Because the clamping position is symmetrical about the central section of the upper clamping piece 400, the clamping force of the upper clamping piece 400 on the implant prosthesis test piece 300 is uniform, and the experimental error is further reduced.
In one possible implementation, the axial-plane taper of the implant prosthesis trial 300 is greater than 0 degrees and less than 90 degrees. In one possible implementation manner, the axial plane taper of the implant prosthesis test piece is 10-20 degrees. The axial and plane taper of the primary dental crown is usually in the range of 10-20 degrees, and the axial and plane taper of the implant prosthesis test piece is set to be 10-20 degrees, so that the experimental result is more accurate. Illustratively, the axial plane taper of the implant prosthesis trial 300 is 15 degrees. Correspondingly, the included angle between the inclined engaging surface 431 in the engaging groove 430 and the vertical central section of the upper clamping member 400 is 15 degrees.
Illustratively, the first clamping portion 110 and the second clamping portion 410 are both flat plate structures, and the thicknesses of the first clamping portion 110 and the second clamping portion 410 are the same. First clamping part 110 and second clamping part 410 all adopt dull and stereotyped structure, easily tensile testing machine's centre gripping, and simultaneously, first clamping part 110 is the same with the thickness of second clamping part 410, do benefit to the coincidence location of last holder 400 and lower holder 100 center.
In the above embodiments, the shapes of the first clamping portion and the first mounting portion of the upper clamping member and the second clamping portion and the second mounting portion of the lower clamping member are only exemplary, and the shapes of the first clamping portion, the first mounting portion, the second clamping portion and the second mounting portion may be changed in design of the external shape and the size according to the shape of the clamp of the tensile testing machine or the size of the implant system. All shapes that can firmly cooperate with the tensile testing machine clamp fall into the protection scope of the application.
Illustratively, in the present application, the lower clamp 100 and the upper clamp 400 are designed and manufactured using SolidWorks software and 3D printer. In the implementation process, when the lower clamping member 100 or the upper clamping member 400 is printed in 3D, corresponding printing materials, such as resin and different metal materials, can be selected according to the tensile force and the requirement on the strength of the material.
According to another aspect of the application, the experimental method for the fixture force of the implanted prosthesis test piece by using the experimental device is further provided.
The experiment on the retention force of the implant prosthesis test piece comprises the following steps:
1. and adhering the implant prosthesis test piece 300 to the adhesion retention abutment 200, vertically pressurizing the implant prosthesis test piece for a preset time by using a weight after the adhesive is completely cured, and placing the implant prosthesis test piece 300 in a constant-temperature water bath for a preset time. For example, the weight may be 5Kg, the predetermined time may be 10 minutes, the temperature of the thermostatic water bath may be 37 ℃ and the time of the thermostatic water bath may be 24 hours.
2. The implant prosthesis test piece 300 is placed in the clamping groove 430, and the first clamping part 110 of the lower clamping member 100 and the second clamping part 410 of the upper clamping member 400 are respectively fixed on a tensile testing machine.
3. Setting the running loading speed of the tensile testing machine, recording the maximum load value of the implant prosthesis test piece 300 and the bonding retention abutment in the dislocation process so as to represent the retention force of the implant prosthesis test piece 300, and storing the retention force data. Illustratively, the running load speed of the tensile tester in this step is 1 mm/min.
In the present application, the bonded retention abutments used in the tensile test are all cleaned and reused. Illustratively, the method of cleaning the bonded retention abutment 200 includes:
removing residual adhesive on the surface of the abutment by using a resin curette so as to prevent the surface of the bonded retention abutment from being scratched;
scraping off the adhesive, cleaning the surface of the base platform by using a 75% alcohol cotton ball, and ultrasonically oscillating for 10 min;
observing whether the surface of the bonded retention abutment is clean by using a body microscope, and repeating the two steps if the adhesive remains;
if the bonded retained abutment surface has been cleaned, the bonded retained abutment surface is washed with steam for 10s and dried naturally for use.
In this application, lower holder 100 and upper holder 400 utilize SolidWorks software design and 3D printer preparation. When the lower clamping member 100 or the upper clamping member 400 is printed in 3D, the corresponding printing materials, such as resin and different metal materials, can be selected according to the tensile force and the requirement for the strength of the material.
Reliability (reliability) is the degree of coincidence between measured values obtained by repeatedly measuring the same object by the same method. The higher the confidence coefficient, the more consistent, stable and reliable the measured value using the method. There are generally three methods to evaluate: internal consistency, retest reliability, and duplicate reliability.
The retest reliability is also called retest reliability, and refers to the difference degree between results of the same experimenter measured successively at different time points. For continuous data, the reassessment/retesting confidence of the measurements is typically analyzed using Pearson product-moment correlation coefficients. The coefficient indicates how well an individual who scored high in the initial assessment scored high in duplicate assessments, and how well an individual who scored low in one assessment scored low in another assessment.
In the application, the reliability experiment result is subjected to retest reliability analysis by using IBM SPSS Statistics 21 software, and Pearson product moment correlation coefficients and intra-group correlation coefficients are calculated. When the correlation coefficient is larger than 0.70, the reliability of the experimental result is good, namely the reliability is good by adopting the method.
According to another aspect of the present application, there is also provided an experimental method for testing the reliability of the experimental apparatus, including the following steps:
preparing a plurality of implant prosthesis test pieces;
respectively testing the retention force of each implant prosthesis test piece by using an experimental method for testing the retention force of one implant prosthesis test piece, and recording the retention force corresponding to the implant prosthesis test piece;
carrying out re-confidence level analysis according to experimental results
In this application, used bonding base station of tensile experiment all need wash back used repeatedly. Illustratively, the method of cleaning the bonded retention abutment 200 includes:
removing residual adhesive on the surface of the base station by using a resin curette to prevent the surface of the bonding base station from being scratched;
scraping off the adhesive, cleaning the surface of the base platform by using a 75% alcohol cotton ball, and ultrasonically oscillating for 10 min;
observing whether the surface of the bonding base station is clean or not by using a body type microscope, and repeating the two steps if the adhesive still remains;
if the bonding base surface is cleaned, the bonding base surface is washed by steam for 10s and naturally dried for standby.
In the embodiment of the application, 10 implant prosthesis test pieces are selected for carrying out retention force experiments, and the 10 implant prosthesis test pieces are randomly divided into two groups, wherein each group comprises 5 implant prosthesis test pieces.
The test results of the reliability test are shown in the following table 1-1. Pearson product moment correlation coefficient is 0.952(P ═ 0.013<0.05), intra-group correlation coefficient is 0.961, 95% confidence interval is (0.712, 0.996).
TABLE 1-1 test results of reliability tests
The reliability experiment performed by the experimental device has the advantages that the result correlation coefficient is larger than 0.7, the reliability is good, namely, the operator performs the retention force experiment on the basis of the design, the consistency is good, namely, the design repeatability is good, and the result is reliable.
In addition, the experimental device has high optimization design accuracy and good repeatability, does not generate obvious obstruction to the bonding process, and can be popularized and applied to most retention experiments.
In the several embodiments provided in the present application, it should be understood that the protection scope of the present application is not limited thereto, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (9)
1. The utility model provides a plant prosthesis test piece retention force experimental apparatus which characterized in that includes:
the lower clamping piece comprises a first clamping part matched with the tensile testing machine and a first installation part in which an implant substitute is embedded, and the implant substitute is fixedly embedded in the first installation part;
the bonding retention abutment is fixedly connected with the implant substitute;
the implant restoration test piece is provided with a jack for being sleeved with the bonding retention abutment, and a binder gap is formed between the implant restoration test piece and the bonding retention abutment after the implant restoration test piece is sleeved on the periphery of the bonding retention abutment; the outer side surface of the implant prosthesis test piece is provided with a preset axial surface taper;
the upper clamping piece comprises a second clamping part matched with the tensile testing machine and a second mounting part used for clamping and fixing the implant prosthesis test piece; and a clamping groove is arranged on the second mounting part, and a clamping surface with the same taper as the axial surface of the implant prosthesis test piece is configured on the clamping groove.
2. The experimental device as set forth in claim 1, wherein the centers of the implant substitute, the bonded retention abutment, and the lower holder coincide with each other when the bonded retention abutment is fixed to the implant substitute and the implant restoration test piece is fitted over the bonded retention abutment; and when the implant prosthesis test piece is clamped and fixed on the second mounting part, the center of the upper clamping piece is superposed with the center of the implant prosthesis test piece.
3. The device according to claim 2, wherein the second mounting portion comprises two oppositely disposed inclined engaging surfaces, and the two inclined engaging surfaces form a slot with an inverted trapezoid cross section.
4. The experimental device as claimed in any one of claims 1 to 3, wherein the first clamping portion and the second clamping portion are both of a flat plate structure, and the thicknesses of the first clamping portion and the second clamping portion are the same.
5. A implant prosthesis test piece is characterized by comprising an inverted frustum-shaped substrate with preset axial surface conicity; the reverse truncated cone base is provided with an insertion hole adapted to the bonded retention abutment in the experimental apparatus according to any one of claims 1 to 4, and the insertion hole penetrates the reverse truncated cone base from the lower bottom surface of the reverse truncated cone base to the upper bottom surface direction portion.
6. The implant prosthesis test piece according to claim 5, wherein the axial plane taper of the implant prosthesis test piece is 10 to 20 degrees.
7. The implant restoration test piece according to claim 5, wherein the upper and lower surfaces of the implant restoration test piece are planar.
8. An experimental method for the retention force of an implanted prosthesis test piece by using the experimental device as claimed in any one of claims 1 to 4, which is characterized by comprising the following steps:
adhering a plant restoration test piece to the adhesion retention abutment, after the adhesive is completely cured, vertically pressurizing the plant restoration test piece for a preset time by using a weight, and after the pressurization is finished, placing the plant restoration test piece in a constant-temperature water bath for a preset time;
placing the implant prosthesis test piece in the clamping groove, and respectively fixing the first clamping part of the lower clamping piece and the second clamping part of the upper clamping piece on the tensile testing machine;
setting the running loading speed of the tensile testing machine, recording the maximum load value of the implant prosthesis test piece and the bonding retention abutment in the dislocation process so as to represent the retention force of the implant prosthesis test piece, and storing retention force data.
9. The experimental method for the retention force of the implanted prosthesis test piece according to claim 8, comprising:
go up holder, lower holder and print the preparation through 3D.
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| CN111579370A (en) * | 2020-07-09 | 2020-08-25 | 中国人民解放军西部战区总医院 | Dental micro-tensile strength testing device |
| CN113514409B (en) * | 2021-06-29 | 2023-06-06 | 广东健齿生物科技有限公司 | Microleakage Test Method for Dental Implant Systems |
| CN115524221B (en) * | 2022-09-26 | 2024-04-09 | 广东健齿生物科技有限公司 | Implant pulling test method |
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