CN201453384U

CN201453384U - Oral parallel grinding guide instrument

Info

Publication number: CN201453384U
Application number: CN2009200873996U
Authority: CN
Inventors: 王革; 陈俊珍; 段银玲; 杨超
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2009-07-17
Filing date: 2009-07-17
Publication date: 2010-05-12
Anticipated expiration: 2019-07-17

Abstract

The utility model relates to an oral parallel grinding guide instrument, which comprises a metal tray, wherein metal rings are arranged on the metal tray, and the metal ring is connected with a position fixing arm; the position fixing arm is hinged with a movable arm, and an observation needle is arranged at the hinge place of the movable arm and the position fixing arm; and an adaptor is arranged at the tail end of the movable arm. The utility model has simple structure, convenience and practicality, and high tooth preparation quality, reduces the occurrence of the undercut and the cohesion angle degree, and ensures that the prepared abutment teeth share a common path of insertion.

Description

Parallel conductive mill instrument in a kind of mouthful

Technical field

This utility model relates to parallel conductive mill instrument in a kind of mouthful.

Background technology

In being equipped with in the tooth process that complete crown and fixed denture are repaired, need follow four basic principles: (1), eliminate recessedly, the maximum Zhou Jing of abutment is reduced to neck edge place; (2), open up enough spaces for the retainer of complete crown or fixed denture; (3), the tooth of axial plane being closed the face degree of polymerization is controlled in the reasonable range; (4), for the fixed restoration of many abutments, then connect into an integral body because of each retainer and pontic, fixed denture on abutment, can only follow when in place a direction wear into, so also must form common path of insertion between each abutment.

Yet in the clinical practice operation, we are difficult to reach above-mentioned requirements.According to the study, leaf-comb is equipped with that the recessed of nearly gum edge place all can appear in a large portion in the tooth, and the fixed denture of many abutments is equipped with and occurs down recessed probability in the tooth and increase greatly especially.The recessed appearance of falling makes dummy difficulty in place, and complete crown or the ceramic crown neck edge porcelain of then can causing in place by force collapses.For the ease of in place, we often on model, fill out recessed, cause artificial tooth back in place gum edge open, the binding agent at gum edge place dissolving easily comes off, it is bad that dental caries usually take place the basic gingival margin of exposure, the various focusing depths represented phenomenon is also common around the artificial tooth simultaneously.And fall recessed appearance, the gum edge adaptation and the aesthetic of dummy are affected.

For fear of falling recessed appearance, people usually close or the too much tissue of tooth of neck 2/3 place cutting at the tooth of abutment, and the tissue of tooth that keeps at neck 1/3 place is more, and this can cause other problem again: at first, the axial plane degree of polymerization of abutment is strengthened, and then cause dummy maintenance power to descend greatly.According to the study, when the leaf-comb axial plane degree of polymerization is increased to 10 ° by 5 °, its maintenance power meeting drop by half; When being increased to 20 °, 1/33 when its maintenance power can drop to 5 °.Secondly,, then can make the thickness low LCL of hat at the bottom of the dummy cervical region porcelain and influence intensity, or hat cervical region thickness is enough but surperficial enamel coating space not enough and influence attractive in appearance at the bottom of the porcelain because the neck 1/3 cutting tissue of tooth of abutment is very few.

As for the fixed restoration of many abutments, owing to will obtain common path of insertion, the problems referred to above can be more outstanding, and artificial tooth is in place more difficult, and the axial plane degree of polymerization is bigger, and the problem that dental pulp and gum edge occur is also more outstanding.

For above problem, domestic scholars is not furtherd investigate as yet, and domestic various research documents are not seen yet and related to.The foreign scholar just proposes a series of tooth methods that effectively are equipped with since the 1970s and 1980s, as the guiding skill of handling needles, mouthful interior observation method, mouthful External Observation method, various supplementary instrument method, as Parallel-A-Prep or the like.But all there is corresponding shortcoming in these methods: the skill of handling needles---chair bit time is long in guiding, and degree of accuracy is not high, can only improve dentine amount fully to a certain extent, and it is not suitable for the patient who needs a plurality of abutments of preparation yet in addition; Observation method in mouthful---its major defect is to observe the parallel situation of the mesial surface far away of abutment, can't observe the parallel situation of cheek lingual surface, and the cheek lingual surface parallel key point of tooth fully that is only whether, also there is the not high enough shortcoming of degree of accuracy in it in addition; Mouth External Observation method---its shortcoming is complex steps, and is time-consuming long, and degree of accuracy is also not high enough; The supplementary instrument method---be that the supplementary instrument of representative all exists the apparatus structure complexity bulky with comparatively practical Parallel-A-Prep, the doctor uses inconvenience, the visual field is characteristics clearly inadequately, domestic patient compares with American-European patient, opening degree is littler, and the bulky shortcoming of Parallel-A-Prep also just shows especially out more.

Summary of the invention

The purpose of this utility model is to address the above problem and provide a kind of simple in structure, and is convenient and practical, be equipped with dentine amount height, reduce fall recessed generation and reduce cohesion angle number, parallel conductive mill instrument in the mouth that many abutments of guaranteeing preparation all have common path of insertion.

This utility model solves the problems of the technologies described above the technical scheme that is adopted:

It comprises metal tray, and metal tray is provided with quoit, is connected with retention arm on the quoit, is hinged with lever arm on the retention arm, and lever arm and retention arm hinged place are provided with the observation pin, and the lever arm end is provided with adapter.

Above-mentioned lever arm is made up of preceding clamping bar cover and movable yoke plate.

Above-mentioned quoit is 2, is symmetrical set on metal tray.

Be connected by jaw between above-mentioned retention arm and the quoit.

Compared with prior art, this utility model has been obtained following technique effect:

1, this utility model is simple in structure, the all deficiencies that in the past are equipped with the tooth method have been overcome, make down recessed number and cohesion degree be far smaller than range estimation and be equipped with the tooth method, improved the common path of insertion of fixed bridge greatly, not influenced by the subjectivity of sight line, and be equipped with tooth and after ocular estimate is equipped with tooth, carried out with the parallel tooth instrument that is equipped with, the chair bit time is shorter, and patient's sense of discomfort is also less;

2, preceding clamping bar cover and movable yoke plate lever arm dimerous can further improve stretching and swing of lever arm, improve the scope of application;

3,, thereby be fit to of the common use of left and right sides dental arch to same pallet by quoit is provided with two about on the metal tray;

4, by jaw retention arm is connected with quoit, for convenience detach and rotation further improves its scope of application.

Description of drawings

Fig. 1 is this utility model structural representation.

Wherein: clamping bar cover, the movable yoke plate of 8-, 9-jaw before 1-metal tray, 2-quoit, 3-retention arm, 4-lever arm, 5-observation pin, 6-adapter, the 7-.

The specific embodiment

Further specify embodiment of the present utility model below in conjunction with accompanying drawing.

Embodiment 1

Referring to Fig. 1, a kind of mouthful of interior parallel conductive mill instrument, it comprises metal tray 1, and left-right symmetric is provided with two quoits 2 on the metal tray, is connected with retention arm 3 by jaw 9 on the quoit, and it can rotate, and convenient disassembly.Be hinged with lever arm 4 on the retention arm, lever arm is made up of preceding clamping bar cover 7 and movable yoke plate 8 two parts.Lever arm and retention arm be hinged to go out to be provided with observation pin 5, and preceding clamping bar overlaps an end and is enclosed within on the observation pin, and the other end and movable yoke plate are hinged, and the lever arm end is provided with adapter 6.

Use of the present utility model is: during use, the oral cavity doctor places silicone rubber kinds hard impression material in metal tray 1, be placed on the denture or alveolar ridge of the abutment offside for preparing, in order to fixed tray; Settle two maintenance quoits 2 in order to connect retention arm on the pallet, can rotate by jaw 9, for convenience detach, to be fit to of the common use of left and right sides dental arch to same pallet; Observation pin 5 is positioned at the junction of retention arm 3 and lever arm 4, in order to the common path of insertion of observation and definite abutment for preparing; Lever arm is made up of preceding clamping bar cover 7 and movable yoke plate 8 two parts, can stretch and rotate the preparation that is beneficial to different tooth position within the specific limits, can lay adapter 6 on the movable yoke plate of lever arm end; The maximum characteristics of adapter be can with the accurately adaptive abutment (not shown) that has the common path of insertion of having determined with accurate preparation of high-speed turbine head.

The scope of application of the present utility model is not limited to the above embodiments, obviously, if those skilled in the art can carry out various changes and distortion and not break away from scope and spirit of the present utility model this utility model. these changes and distortion belong in the scope of this utility model claim and equivalent technologies thereof, and intention then of the present utility model also comprises these changes and distortion interior.

Claims

1. the interior parallel conductive of mouth is ground instrument, it is characterized in that: it comprises metal tray (1), metal tray is provided with quoit (2), be connected with retention arm (3) on the quoit, be hinged with lever arm (4) on the retention arm, lever arm and retention arm hinged place are provided with observation pin (5), and the lever arm end is provided with adapter (6).

2. parallel conductive mill instrument in according to claim 1 mouthful, it is characterized in that: described lever arm is made up of preceding clamping bar cover (7) and movable yoke plate (8).

3. parallel conductive mill instrument in according to claim 1 and 2 mouthful, it is characterized in that: described quoit is 2, is symmetrical set on metal tray.

4. parallel conductive mill instrument in according to claim 1 and 2 mouthful is characterized in that: be connected by jaw (9) between described retention arm and the quoit.