CN105147408A - Preparation quantity measuring device for prepared teeth and method for applying preparation quantity measuring device - Google Patents

Abstract

A tooth preparation measuring device and method of use thereof. The preparation measuring device is composed of: a thickness calibration ruler (4) and a silicone tooth preparation indicator obtained from a diagnostic wax-type impression of a target restoration. Rubber guide plate model group; the silicone rubber guide plate model group includes a section indication model (1) for guiding the prepared tooth (5) section preparation, a lip surface indication model (2) for guiding the prepared tooth (5) lip surface preparation and The lingual surface indicator model (3) for guiding the preparation of the tooth body (5) lingual surface preparation; the thickness calibration ruler (4) includes a handle (4a) and a measuring needle (4b) fixedly connected with the handle (4a); the measuring needle ( 4b) Set the scale on the side of the needle body close to the needle. The device can check whether the shape of the preparation is ideal, measure the preparation amount of the tooth, and guide the precise preparation of the tooth, and the device is easy to use, safe and reliable.

Description

A preparation amount measuring device for preparing a tooth and its application method

technical field

The invention relates to a preparation quantity measuring device for a prepared tooth and a method for using the same, belonging to the technical field of medical instruments.

Background technique

Dental aesthetic restoration is to take measures to change the shape of teeth and (or) periodontal tissue, and strive to achieve the greatest degree of coordination in the appearance and function of teeth, so as to optimize the final effect of restoration. For patients with restoration in the aesthetic area, aesthetic analysis and design are required first, and a diagnostic wax-up, that is, the target restoration, is designed and manufactured on the basis of the patient's original tooth model. Then, the porcelain crown restoration is bonded to the tooth that needs to be restored, so that the restored tooth is consistent with the target restoration and achieves an aesthetic effect. However, due to the limitation of the minimum thickness of the porcelain crown restoration and the unsightly protruding part of the restored tooth, it is necessary to perform tooth preparation on the restored tooth before bonding the porcelain crown restoration, that is, to grind the tooth The excess part of the tooth; at this time, the tooth to be restored is called the preparation tooth. Tooth preparation is one of the most basic operations in the Department of Prosthodontics. In order to preserve the tooth tissue to the greatest extent and remove as little tooth tissue as possible, it is necessary to grasp the spatial position relationship between the shape of the prepared tooth and the target restoration. It is generally required to have a uniform space gap of a certain size between the outer contour of the prepared tooth and the outer contour of the target restoration, which directly involves the judgment and determination of the amount of tooth tissue removed. At present, dental clinicians often use the method of visually measuring the amount of grinding to prepare preparations. This method has large errors, and the restoration effect is highly dependent on the clinician's experience, especially in the restoration treatment where the shape of the tooth needs to be changed. Existing methods often result in over-preparation (too much tooth tissue) or under-preparation (need to measure and prepare again). Therefore, there is an urgent need for a tool and method for minimally invasive and rapid tooth preparation, which can accurately obtain the amount of tooth preparation based on simple and intuitive.

Contents of the invention

The first object of the present invention is to provide a preparation amount measuring device for tooth preparation, which can check whether the shape of the preparation is ideal, measure the preparation amount of the tooth, and guide the accurate preparation of the tooth, and the device is easy to use and safe reliable.

The technical means adopted by the present invention to realize its first invention objective is: a preparation measuring device for tooth preparation, which is composed of a thickness calibration ruler and a diagnostic wax-type impression of the target restoration for tooth preparation Indicated silicone rubber guide plate model group; the silicone rubber guide plate model set includes a section indication model for guiding the section preparation of the prepared tooth, a labial surface indication model for guiding the preparation of the labial surface of the prepared tooth, and a tongue for guiding the preparation of the lingual surface of the tooth A surface indicator model; the thickness calibration ruler includes a handle and a measuring needle fixedly connected with the handle; the measuring needle is provided with a scale near the needle body side of the needle.

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

The present invention can intuitively, simply and accurately measure the preparation amount of the three exposed surfaces on the prepared tooth through three silicone rubber guide plate models and a thickness calibration ruler, as a guide for tooth preparation; compared with the existing visual inspection The method of the amount of preparation, the measurement of the amount of preparation of the prepared tooth is intuitive, simple and accurate, without repeated observation, reducing the operation links and time of tooth preparation, reducing the discomfort of the patient, and the restoration of the tooth and the target The consistency of the restoration is good and the restoration effect is good.

Further, the silicone rubber guide plate model group of the present invention is made by the following method:

A. Perform three impressions on the diagnostic wax-up of the target restoration, and obtain the silicone rubber guide plate 1, the silicone rubber guide plate 2 and the silicone rubber guide plate 3 surrounding the target prepared tooth and its adjacent 3-5 teeth respectively;

B. Cut off the labial surface of the silicone rubber guide plate that surrounds the target preparatory tooth, and obtain a section indicating model that retains the three surrounding surfaces of the adjacent 3-5 teeth and the target preparatory tooth cutting surface;

C. Cut off the lingual surface and incision surface of the silicone rubber guide plate 2 surrounding the target preparatory tooth, and obtain the lip surface indicator model that retains the three surrounding surfaces of the adjacent 3-5 teeth and the lip surface surrounding surface of the target preparatory tooth ;

D. Cut off the incisive surface and labial surface of the three-wrapping target preparation tooth with the silicone rubber guide plate, and obtain the lingual surface indicator model that retains the three-wrapping surfaces of the adjacent 3-5 teeth and the lingual wrapping surface of the target preparation tooth .

In this way, a silicone rubber guide plate model group that can accurately guide tooth preparation is produced through a simple method. The indicator model on each side of the prepared tooth has adjacent 3-5 teeth that can fix the indicator model card in the patient's mouth. The three surrounding surfaces of the body facilitate the fixing and measurement of the indicating model, making the measurement more intuitive, accurate and convenient.

Further, the scale provided on the side of the needle body of the measuring needle of the thickness calibration ruler according to the present invention close to the needle head is composed of regions of different colors.

In this way, the scales of different colors can be used for accurate measurement during the doctor's operation, so as to guide the tooth preparation accurately.

The second invention object of the present invention is a method of using the above-mentioned device for measuring the preparation amount of the prepared tooth. The method is simple and fast, and avoids the problems of large randomness and large errors caused by the doctor's tooth preparation based on clinical experience. , in line with the mainstream trend of "precise" and "minimally invasive" on the international platform.

The technical means adopted by the present invention for realizing the purpose of its second invention is: a method for using the preparation amount measuring device of the above-mentioned prepared tooth body, the steps are:

A1. Wear the three wrapping surfaces of the adjacent 3-5 teeth of the cutting surface indication model on the corresponding teeth of the patient;

A2. Use the thickness calibration ruler to measure the gap S between the cut surface of the patient’s prepared tooth and the surrounding surface of the target prepared tooth. When the gap S is greater than or equal to the minimum thickness of the porcelain crown restoration, the cut surface preparation of the prepared tooth is 0; when the gap S is less than the minimum thickness of the porcelain crown restoration, the section preparation amount of the prepared tooth is the difference between the minimum thickness of the porcelain crown restoration minus the gap S;

A3. Prepare the cut surface of the prepared tooth according to the cut surface preparation amount of the prepared tooth body obtained in step A2;

B1. Wear the three surrounding surfaces of the adjacent 3-5 teeth of the labial surface indicator model on the corresponding teeth of the patient;

B2. Use the thickness calibration ruler to measure the gap S between the labial surface of the patient's prepared tooth and the lip surface of the target prepared tooth. When the gap S is greater than or equal to the minimum thickness of the porcelain crown restoration, the labial surface of the prepared tooth The preparation amount is 0; when the gap S is less than the minimum thickness of the porcelain crown restoration, the labial surface preparation of the prepared tooth is the difference between the minimum thickness of the porcelain crown restoration minus the gap S;

B3. According to the labial surface preparation amount of the prepared tooth body obtained in step B2, perform the labial surface preparation of the prepared tooth body;

C1. Wear the three surrounding surfaces of the adjacent 3-5 teeth of the lingual surface indicator model on the corresponding teeth of the patient;

C2. Use the thickness calibration ruler to measure the gap S between the lingual surface of the patient’s prepared tooth and the lingual surface of the target prepared tooth. When the gap S is greater than or equal to the minimum thickness of the porcelain crown restoration, the lingual surface of the prepared tooth The preparation amount is 0; when the gap S is less than the minimum thickness of the porcelain crown restoration, the lingual preparation amount of the prepared tooth is the difference between the minimum thickness of the porcelain crown restoration minus the gap S;

C3. Perform lingual preparation of the prepared tooth according to the lingual preparation amount of the prepared tooth obtained in step C2.

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

The method of the invention completes the measurement of the prepared tooth labial surface, lingual surface and incisal surface preparation through simple operations, and accurately guides the preparation of the tooth body; it can quickly complete the preparation of the tooth body without being disturbed by the doctor's clinical experience.

A progressive description of the present invention will be made below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic diagram (front view) of a section indicating model according to an embodiment of the present invention when it is used for upper tooth preparation measurement.

Fig. 2 is a schematic diagram (bottom view) of the labial surface indicating model of the embodiment of the present invention when it is used for the measurement of upper teeth preparation.

Fig. 3 is a schematic diagram (bottom view) of the lingual surface indicating model of the embodiment of the present invention when it is used for the measurement of upper teeth preparation.

Fig. 4 is a schematic structural diagram of a thickness gauge according to an embodiment of the present invention.

Detailed ways

A specific embodiment of the present invention is a preparation amount measuring device for preparing a tooth, which is composed of: a thickness calibration ruler 4 and silicon for tooth preparation indication obtained from a diagnostic wax-type impression of the target restoration. Rubber guide plate model group; the silicone rubber guide plate model set includes a section indication model 1 for guiding the prepared tooth body 5 section preparation, a labial surface indication model 2 for guiding the prepared tooth body 5 labial surface preparation and a 5 lingual surface preparation guide for the prepared tooth body Figure 4 shows that the thickness calibration ruler 4 includes a handle 4a and a measuring needle 4b fixedly connected to the handle 4a; the measuring needle 4b is provided with a scale near the needle body side of the needle.

The silicone rubber template model set described in this example was made by:

A. Perform three impressions on the diagnostic wax-up of the target restoration, and obtain the silicone rubber guide plate 1, the silicone rubber guide plate 2 and the silicone rubber guide plate 3 surrounding the target prepared tooth and its adjacent 3-5 teeth respectively;

B. Cut off the labial surface of the silicone rubber guide plate that surrounds the target preparatory tooth, and obtain the cut surface indicating model 1 that retains the three surrounding surfaces 1a of the adjacent 3-5 teeth and the target preparatory tooth cutting surface surrounding surface 1b ;

C. Cut off the lingual surface and cut surface of the silicone rubber guide plate 2 surrounding the target preparatory tooth, and obtain the lip surface that retains the three surrounding surfaces 2a of the adjacent 3-5 teeth and the lip surface 2b of the target preparatory tooth Indicates model 2;

D. Cut off the cutting surface and labial surface of the silicone rubber guide plate three times surrounding the target prepared tooth, and obtain the lingual surface that retains the three surrounding surfaces 3a of the adjacent 3-5 teeth and the lingual surrounding surface 3b of the target prepared tooth Model 3 is indicated.

The scale provided on the side of the needle body of the measuring needle 4b of the thickness calibration ruler 4 close to the needle head described in this example is composed of areas of different colors.

The method for using the preparation amount measuring device for the prepared tooth body described in this example, the steps are:

A1. Wear the three wrapping surfaces 1a of the adjacent 3-5 teeth of the section indicating model 1 on the corresponding teeth of the patient;

A2. Use the thickness calibration ruler 4 to measure the gap S between the cut surface of the patient's prepared tooth 5 and the cut surface 1b of the target prepared tooth. When the gap S is greater than or equal to the minimum thickness of the porcelain crown restoration, the prepared tooth 5 The section preparation amount of the tooth is 0; when the gap S is less than the minimum thickness of the porcelain crown restoration, the section preparation amount of the prepared tooth 5 is the difference between the minimum thickness of the porcelain crown restoration minus the gap S, as shown in Figure 1;

A3. Prepare the cut surface of the prepared tooth body 5 according to the cut surface preparation amount of the prepared tooth body 5 obtained in step A2;

B1. Wear the three surrounding surfaces 2a of the adjacent 3-5 teeth of the labial surface indicator model 2 on the corresponding teeth of the patient;

B2. Use the thickness calibration ruler 4 to measure the gap S between the labial surface of the patient's prepared tooth 5 and the lip surface 2b of the target prepared tooth. When the gap S is greater than or equal to the minimum thickness of the porcelain crown restoration, prepare the tooth The labial surface preparation of 5 is 0; when the gap S is less than the minimum thickness of the porcelain crown restoration, the labial surface preparation of the prepared tooth 5 is the difference between the minimum thickness of the porcelain crown restoration minus the gap S, as shown in Figure 2 ;

B3, according to the labial surface preparation amount of the prepared tooth body 5 obtained in step B2, perform the labial surface preparation of the prepared tooth body 5;

C1. Wear the three wrapping surfaces 3b of the adjacent 3-5 teeth of the lingual surface indicator model 3 on the corresponding teeth of the patient;

C2. Use the thickness calibration ruler 4 to measure the gap S between the lingual surface of the patient's prepared tooth 5 and the lingual surface 3b of the target prepared tooth. When the gap S is greater than or equal to the minimum thickness of the porcelain crown restoration, prepare the tooth The lingual preparation amount of 5 is 0; when the gap S is less than the minimum thickness of the porcelain crown restoration, the lingual preparation amount of the prepared tooth 5 is the difference between the minimum thickness of the porcelain crown restoration minus the gap S, as shown in Figure 3 ;

C3. Perform lingual preparation of the prepared tooth 5 according to the lingual preparation amount of the prepared tooth 5 obtained in step C2.

The cutting surface, lingual surface and labial surface of the prepared tooth body of the present invention belong to the existing knowledge in the field of oral medicine technology, respectively represent the occlusal surface (horizontal plane) of the prepared tooth body, the side (inner surface) near the tongue and the side close to the lips ( Outside).

Claims (4)

1. prepare a preparation measuring device for tooth body, its composition is: the silicone rubber guide plate model group for tooth preparation instruction that thickness scaling ruler (4) and the diagnosis wax pattern die to target dummy obtain; Described silicone rubber guide plate model group comprises tangent plane instruction model (1) instructing body (5) the tangent plane preparation of preparation tooth, instructs labial surface instruction model (2) of preparation tooth body (5) labial surface preparation and instructs lingual surface instruction model (3) of preparation tooth body (5) lingual surface preparation; The surveyingpin (4b) that described thickness scaling ruler (4) comprises handle (4a) and is fixedly connected with handle (4a); Surveyingpin (4b) arranges scale near the needle body side of syringe needle.

2. a kind of preparation measuring device preparing tooth body according to claim 1, is characterized in that: described silicone rubber guide plate model group is obtained by following methods:

A, No. three dies are carried out to the diagnosis wax pattern of target dummy, obtain holding the silicone rubber guide plate one of target preparation tooth body and adjacent 3-5 tooth body thereof, silicone rubber guide plate two and silicone rubber guide plate three respectively;

B, cut away the labial surface that silicone rubber guide plate one holds target preparation tooth body region, obtain retaining adjacent 3-5 tooth body three and hold tangent plane instruction model (1) that face (1a) and target preparation tooth body tangent plane hold face (1b);

C, cut away lingual surface and tangent plane that silicone rubber guide plate two holds target preparation tooth body region, obtain retaining adjacent 3-5 tooth body three and hold labial surface instruction model (2) that face (2a) and target preparation tooth body labial surface hold face (2b);

D, cut away tangent plane and labial surface that silicone rubber guide plate three holds target preparation tooth body region, obtain retaining adjacent 3-5 tooth body three and hold lingual surface instruction model (3) that face (3a) and target preparation tooth body lingual surface hold face (3b).

3. a kind of preparation measuring device preparing tooth body according to claim 1, is characterized in that: the scale that the surveyingpin (4b) of described thickness scaling ruler (4) is arranged near the needle body side of syringe needle is made up of regions of different colours.

4. a using method for the preparation measuring device of preparation tooth body according to claim 1, the steps include:

A1, indicate three of adjacent 3-5 tooth body of model (1) to hold face (1a) tangent plane to be worn on tooth body corresponding to patient;

A2, the tangent plane measuring the preparation tooth body (5) of patient with thickness scaling ruler (4) and target preparation tooth body tangent plane hold the gap S between face (1b), when gap S is more than or equal to the minimum thickness of porcelain hat dummy, the tangent plane preparation amount of preparation tooth body (5) is 0; When gap S is less than the minimum thickness of porcelain hat dummy, the tangent plane preparation amount of preparation tooth body (5) is that the minimum thickness of porcelain hat dummy deducts the difference of gap S;

A3, walk the tangent plane preparation amount of the preparation tooth body (5) obtained according to A2, carry out the tangent plane preparation preparing tooth body (5);

B1, indicate three of adjacent 3-5 tooth body of model (2) to hold face (2a) labial surface to be worn on tooth body corresponding to patient;

B2, the labial surface measuring the preparation tooth body (5) of patient with thickness scaling ruler (4) and target preparation tooth body labial surface hold the gap S between face (2b), when gap S is more than or equal to the minimum thickness of porcelain hat dummy, the labial surface preparation amount of preparation tooth body (5) is 0; When gap S is less than the minimum thickness of porcelain hat dummy, the labial surface preparation amount of preparation tooth body (5) is that the minimum thickness of porcelain hat dummy deducts the difference of gap S;

B3, walk the labial surface preparation amount of the preparation tooth body (5) obtained according to B2, carry out the labial surface preparation preparing tooth body (5);

C1, indicate three of adjacent 3-5 tooth body of model (3) to hold face (3b) lingual surface to be worn on tooth body corresponding to patient;

C2, the lingual surface measuring the preparation tooth body (5) of patient with thickness scaling ruler (4) and target preparation tooth body lingual surface hold the gap S between face (3b), when gap S is more than or equal to the minimum thickness of porcelain hat dummy, the lingual surface preparation amount of preparation tooth body (5) is 0; When gap S is less than the minimum thickness of porcelain hat dummy, the lingual surface preparation amount of preparation tooth body (5) is that the minimum thickness of porcelain hat dummy deducts the difference of gap S;

C3, walk the lingual surface preparation amount of the preparation tooth body (5) obtained according to C2, carry out the lingual surface preparation preparing tooth body (5).