CN104814804A - Anterior tooth aesthetic repair tooth preparation quantity measuring method and preparation method - Google Patents

Abstract

A tooth preparation method for the aesthetic restoration of anterior teeth, the steps are: A. The materialization of the preparation: obtain the plaster model of the target restoration from the beautiful wax-type impression obtained from the original model of the tooth; The plaster model of the restoration is prepared to obtain the plaster model of the preparatory body; the quick-setting resin material is injected into the silicone rubber guide plate obtained by pressing the original tooth model, and then the plaster model of the preparatory body is placed in place. After the quick-setting resin material is solidified, disassemble Remove the silicone rubber guide plate to obtain the preparatory volume entity containing the plaster model of the preparatory body; B. Preparatory volume entity measurement: measure the incisal end of the preparatory volume entity, the lip-lingual surface and the thickness of 3-13 key points determined by the two adjacent surfaces; C Tooth preparation: According to the thickness of each key point of the prepared entity, drill deep holes of corresponding thickness at the corresponding key points of the tooth, and then polish each surface to complete the tooth preparation. This method can accurately measure the preparation amount of the tooth body and complete the preparation of the tooth body.

Description

Measurement and preparation method of tooth preparation for aesthetic restoration of anterior teeth

technical field

The invention relates to a measurement of a tooth preparation and a preparation method thereof, in particular to a measurement of a tooth preparation for aesthetic restoration of anterior teeth and a preparation method thereof.

Background technique

The aesthetic restoration of anterior teeth is to take measures to change the shape of the teeth and (or) periodontal tissue, and strive to achieve the greatest degree of coordination in the appearance and function of the teeth, so as to optimize the final effect of the restoration. For patients with restoration in the aesthetic area, aesthetic analysis and design are required first, and an aesthetic wax-up model is made on the basis of the patient's original tooth model, that is, the shape of the target restoration, and then the tooth (preparation) is carried out under the guidance of the shape of the target restoration. Preparation, striving to accurately replicate the target restoration as the final restoration.

At present, guided by the shape of the target restoration, the operation of tooth preparation is:

The plaster model of the target restoration was obtained from the beautiful wax-type impression; it was converted into a silicone rubber guide plate with the incisal end exposed and a silicone rubber guide plate with the labial surface exposed.

The silicone rubber guide plate with the exposed incisal end is used to guide the preparation of the cross-section of the labial and lingual surface of the tooth: put the silicone rubber guide plate in place in the mouth, and observe whether the vertical distance from the guide plate to the tooth reaches the required porcelain on the cross-section of the incisal end. If it is not enough, take out the silicone rubber guide plate from the mouth and continue to prepare; after the preparation, put the silicone rubber guide plate into the mouth again and observe; repeat the above steps of positioning, observing, taking out, and preparing until the tooth The vertical distance between the body and the silicone rubber guide plate reaches the reserved space for the porcelain layer. Then evenly cut off a layer of silicone rubber guide plate in the horizontal direction to guide the preparation of the labial-lingual surface of the next cross-section.

The silicone rubber guide plate with the exposed lip surface is used to guide the tooth preparation at the incisal end: put the silicone rubber guide plate in place in the mouth, and observe whether the vertical distance from the incisal end of the tooth to the incisal end stop of the guide plate reaches the required space for the porcelain layer. If it is not enough, take out the silicone rubber guide plate from the mouth and continue to prepare; after the preparation, put the silicone rubber guide plate into the mouth again and observe; repeat the above steps of positioning, observing, taking out, and preparing until the teeth and the silicone rubber guide plate are perpendicular to each other. The distance reaches the reserved amount of porcelain layer space.

The above method needs to make multiple levels of silicone rubber guide plates and take them off and on repeatedly, which is cumbersome to operate and increases the discomfort of the patient. Moreover, this method cannot accurately measure the amount of tooth preparation, and the preparation error is large; it requires doctors to use clinical experience, and it is difficult for beginners to accurately grasp.

Contents of the invention

The invention provides a measurement and a preparation method of tooth body preparation for aesthetic restoration of anterior teeth. This method can accurately measure the preparation amount of the tooth and use it as a guide to complete the preparation of the tooth. It is easy to operate and conforms to the mainstream trend of "precise and minimally invasive"; it avoids the discomfort caused by the repeated removal and wearing of the silicone rubber guide plate to the patient. It also reduces the requirement for doctors' clinical experience, and overcomes the disadvantages of large randomness, large errors, and unpredictable results when doctors use experience to prepare teeth.

The technical scheme that the present invention takes for realizing its purpose of the invention is: a kind of measurement and the preparation method thereof of the tooth body preparation amount of anterior tooth aesthetic restoration, its steps are:

A. The materialization of the reserve

A1. Preparation of ideal preparation: obtain a beautiful wax-up from the original tooth model, and make an impression on the beautiful wax-up to obtain a plaster model of the target restoration; prepare on the plaster model of the target restoration according to the minimum amount of preparation, and obtain a plaster model of the preparation ;

A2. Preparatory physical preparation: Press the original tooth model to obtain a silicone rubber guide plate, inject quick-setting resin material into the silicone rubber guide plate, and then put the prepared plaster model into the silicone rubber guide plate in place, so that the quick-setting resin material is filled with silicon rubber. The gap between the rubber guide plate and the gypsum preparation; when the quick-setting resin material is solidified, the silicone rubber guide plate is removed, and the preparation body containing the gypsum model of the preparation is obtained;

B. Physical measurement of reserve quantity

Determine 3-13 key points on the incisal end, labial-lingual surface, and two adjacent surfaces of the preparation body containing the preparation plaster model, then take out the preparation plaster model, and measure the thickness at each key point of the preparation body with a caliper ;

C. Tooth preparation

According to the thickness at each key point of the preparation amount obtained in step B, drill a deep hole with a corresponding thickness at the key point corresponding to the tooth body through a depth calibration drill, and then polish each surface in turn, so that the polished surface reaches each The bottom of the first deep hole, the preparation of the tooth is completed.

Compared with prior art, the beneficial effect of the present invention is:

The present invention materializes the preparation amount of the tooth body through the quick-setting resin material, and accurately measures the size of the preparation amount at each point as a guide for the preparation of the tooth body; further assists in completing the preparation of the tooth body through a depth calibration drill; this method can be used in the tooth body Precisely calibrate the amount of tooth preparation on the body and complete the preparation of the tooth body, and the operation is simple; there is no need to use the silicone rubber guide plate for repeated checks, which reduces the discomfort caused to the patient, and this method reduces the need for the doctor's clinical experience. It overcomes the shortcomings of large randomness and large errors in tooth preparation by doctors based on experience.

Further, the quick-setting resin material used in step A2 of the present invention is methyl methacrylate.

Methyl methacrylate is an organic compound, also known as MMA, is a dental material commonly used in the manufacture of temporary crowns. It has the advantages of easy shaping and polishing, fast solidification, and similar color to teeth.

Further, in the step B of the present invention, the specific method of determining 3-13 key points respectively on the incisal end, the labial-lingual surface and the two adjacent surfaces of the preparation volume entity is as follows:

On the labial and lingual surfaces of the preparation entity containing the preparation plaster model, draw two trisecting horizontal lines along the tooth long axis and two trisecting vertical lines perpendicular to the tooth long axis;

The horizontal line and the vertical line divide the lip and tongue into nine areas, the intersection of the three lines and the center point of each area are the key points of the pre-measured solid lip and tongue;

Extend the trisecting horizontal line of the lip surface to the adjacent surface, divide the adjacent surface into three areas, and the midpoint of each area is the key point of the adjacent surface of the prepared volume entity; extend the trisecting vertical line of the lip surface to the incisive end , the incisal end is divided into three areas, and the midpoint of each area is the key point of the incisal end of the reserve volume entity.

In order to ensure accurate transfer of measurement data from the resin to the tooth, the stability of keypoint positions is very important. Throughout the transfer, the shape of the target restoration is stable, so the position and intersection of the three-sector lines of each surface are also stable. Therefore, further determining the position of the key points through the three-sector lines Stable and repeatable.

Further, the specific structure of the depth calibration drill in step C of the present invention is: the needle handle of the depth calibration drill can cooperate with the dental turbine; the needle head of the depth calibration drill has a diamond coating for drilling; The calibration drill is provided with a scale on the side of the needle body close to the needle head, and the scale is composed of different color areas.

This kind of depth calibration drill can be adapted to the existing dental turbine, and the scales of different colors can be used for accurate depth determination during the doctor's operation, so as to accurately drill deep holes of corresponding thickness at the corresponding key points of the tooth, and assist in the completion Precise preparation of teeth.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of a depth calibration drill used in an embodiment of the present invention.

In the figure, a represents the needle handle of the depth calibration drill, b represents the emery coating of the depth calibration drill head, and c represents the scale on the side of the depth calibration drill body.

Detailed ways

Example

A kind of embodiment of the present invention is: a kind of tooth preparation amount and preparation method thereof of aesthetic restoration of anterior teeth, its steps are:

A. The materialization of the reserve

A1. Preparation of the ideal preparation: Obtain an aesthetic wax-up from the original tooth model, and make an impression on the aesthetic wax-up to obtain a plaster model of the target restoration; follow the minimum preparation (that is, the selected crown material reaches the minimum strength that can withstand the occlusal force) Thickness) is prepared on the plaster model of the target restoration to obtain the plaster model of the prepared body;

A2. Preparatory physical preparation: Press the original tooth model to obtain a silicone rubber guide plate, inject quick-setting resin material into the silicone rubber guide plate, and then put the prepared plaster model into the silicone rubber guide plate in place, so that the quick-setting resin material is filled with silicon rubber. The gap between the rubber guide plate and the gypsum preparation; when the quick-setting resin material is solidified, the silicone rubber guide plate is removed, and the preparation body containing the gypsum model of the preparation is obtained;

B. Physical measurement of reserve quantity

Determine 3-13 key points on the incisal end, labial-lingual surface, and two adjacent surfaces of the preparation body containing the preparation plaster model, then take out the preparation plaster model, and measure the thickness at each key point of the preparation body with a caliper ;

C. Tooth preparation

According to the thickness at each key point of the preparation amount obtained in step B, drill a deep hole with a corresponding thickness at the key point corresponding to the tooth body through a depth calibration drill, and then polish each surface in turn, so that the polished surface reaches each The bottom of the first deep hole, the preparation of the tooth is completed.

The quick-setting resin material used in step A2 described in this example is methyl methacrylate.

In the step B described in this example, the specific method of determining 3-13 key points on the incisal end, lip-lingual surface and two adjacent surfaces of the preparatory entity is as follows:

On the labial and lingual surfaces of the preparation entity containing the preparation plaster model, draw two trisecting horizontal lines along the tooth long axis and two trisecting vertical lines perpendicular to the tooth long axis;

The horizontal line and the vertical line divide the lip and tongue into nine areas, the intersection of the three lines and the center point of each area are the key points of the pre-measured solid lip and tongue;

Extend the trisecting horizontal line of the lip surface to the adjacent surface, divide the adjacent surface into three regions, and the midpoint of each region is the key point of the adjacent surface of the prepared volume entity; extend the trisecting vertical line of the lip surface to the incisive end , the incisal end is divided into three areas, and the midpoint of each area is the key point of the incisal end of the reserve volume entity.

Figure 1 shows that the specific structure of the depth calibration drill in step C in this example is: the needle handle a of the depth calibration drill can cooperate with the dental turbine; the needle head of the depth calibration drill has a hole for drilling Carborundum coating b; the depth calibration drill is provided with a scale c on the side of the needle body near the needle head, and the scale c is composed of different color areas.

Claims (3)

1. the measurement of the tooth preparation amount of labial teeth aesthetic orthopaedics and a preparation method thereof, the steps include:

The hypostazation of A, preparation amount

Prepared by A1, desirable Tooth preparation: obtain wax pattern attractive in appearance by tooth body archetype, carry out die obtain target dummy plaster model to wax pattern attractive in appearance; Measure according to minimum preparation, target dummy plaster model prepares, obtains Tooth preparation plaster model;

Prepared by A2, preparation amount entity: suppressed obtaining silicone rubber guide plate by tooth body archetype, fast-set resin material is injected in silicone rubber guide plate, again Tooth preparation plaster model is inserted silicone rubber guide plate in place, make fast-set resin material be full of gap between silicone rubber guide plate and Gypsum Fibrosum Tooth preparation; Treat fast-set resin material solidification, remove silicone rubber guide plate, namely obtain the preparation amount entity including Tooth preparation plaster model;

B, preparation amount entity measuring

Determine 3-13 key point respectively at cut end, words face and two proximal surfaces of the preparation amount entity including Tooth preparation plaster model, then take out Tooth preparation plaster model, then with the thickness at each key point place of kind of calliper preparation amount entity;

C, tooth preparation

The thickness at each key point place of preparation amount entity obtained is walked according to B, the deep hole that drill point gets out corresponding thickness is demarcated by the degree of depth by the key point place corresponding at tooth body, again polishing is carried out successively in each face, make burnishing surface arrive at the bottom of each deep hole, namely complete the preparation of tooth body.

2. the measurement of the tooth preparation amount of a kind of labial teeth aesthetic orthopaedics according to claim 1 and preparation method thereof, is characterized in that: fast-set resin material used in described steps A 2 is methyl methacrylate.

3. the measurement of the tooth preparation amount of a kind of labial teeth aesthetic orthopaedics according to claim 1 and preparation method thereof, is characterized in that: cut end, words face and two proximal surfaces at preparation amount entity in described step B determine that the specific practice of 3-13 key point is respectively:

Including the labial surface of preparation amount entity and the lingual surface of Tooth preparation plaster model, draw two trisection horizontal lines along long axis of tooth direction and two trisection vertical lines perpendicular to long axis of tooth direction;

Labial surface and lingual surface are divided into 9th district by trisection horizontal line and trisection vertical line, the intersection point of trisection line, and the central point in every district, are the key point of preparation amount entity labial surface and lingual surface;

The trisection horizontal line of labial surface is extended to proximal surface, proximal surface is divided into 3rd district, the mid point in every district is the key point of preparation amount entity proximal surface; Extended to by the trisection vertical line of labial surface and cut end, will cut end and be divided into 3rd district, the mid point in every district is the key point that preparation amount entity cuts end.