CN102525665A

CN102525665A - Shoulder grinder

Info

Publication number: CN102525665A
Application number: CN2012100004342A
Authority: CN
Inventors: 常翔双; 高勃; 胡月
Original assignee: Fourth Military Medical University FMMU
Current assignee: Fourth Military Medical University FMMU
Priority date: 2012-01-05
Filing date: 2012-01-05
Publication date: 2012-07-04

Abstract

The invention discloses a shoulder grinder. The shoulder grinder is an integrated structure and is divided into a handle section, a transition section, a bent section and a working section, wherein an angle between the transition section and the bent section is no less than 150 DEG and less than 180 DEG, an angle between the bent section and the working section is 90-150 DEG, the tail end of the working section is a cutting blade, and the blade angle of the cutting blade is more than 15 DEG and less than 90 DEG. Proved by the experiments of the applicant, the shoulder grinder disclosed by the invention slides on a shoulder under an appropriate pressure by using an angle formed between the sharp cutting blade and the shoulder, and thus, the shoulder is smoothly, flatly and continuously ground.

Description

A kind of shoulder sharpener

Technical field

The present invention relates to the manual medical apparatus and instruments of use in a kind of oral cavity, particularly a kind of shoulder sharpener.

Background technology

In the fixed and repaired process, adopt traditional car pin usually, rotating speed can be up to 300,000 rpms on the high-speed turbine hand set for the car pin; Preparation abutment speed is fast, but brings problem equally at a high speed: doctor's hands can cause shoulder and abutment axial plane rough and uneven in surface if any slight jitter; Can suitably improve the problems referred to above though use polishing car pin; But through clinical observation, still exist the shoulder form rough and uneven in surface, problem such as the shoulder edge is discontinuous.Especially under doctor's fatigue state, aprosexia, similar problem highlighted more when responsibility was insufficient.

The applicant observes through lots of clinical and finds; Ideal shoulder form; What maneuver was suitable when needing the reparation doctor to operate stablizes, and requires the doctor to restrain oneself fatigue, keeps the attention high concentration for a long time; Otherwise what any small carelessness all can cause the shoulder form owes smooth, and then reparation is in the future caused a hidden trouble.Press for a kind of auxiliary facilities clinically, can improve the smoothness and the seriality of shoulder at short notice through shirtsleeve operation.

Summary of the invention

The objective of the invention is to, a kind of shoulder sharpener is provided, main effect is in the fixed and repaired, behind the abutment preparation, is used for grinding abutment shoulder, can make shoulder smooth coherent, improves hat edge fitness.

In order to realize above-mentioned task, the present invention takes following technical solution:

A kind of shoulder sharpener; It is characterized in that this shoulder sharpener is an integral structure, is divided into handle section, changeover portion, bending section and active section; Angle between described changeover portion and the bending section is more than or equal to 150 ° and less than 180 °; Angle between bending section and the active section is 90 °～150 °, and the end of active section is a blade, and the basil of blade is greater than 15 ° and less than 90 °.

Through experiment showed, of applicant shoulder sharpener of the present invention, utilize sharp blade and shoulder structure to have a certain degree, under the pressure of appropriateness, on shoulder, slide, thereby it is smooth that shoulder is planed, smooth, continuously.

Description of drawings

Fig. 1 is a shoulder sharpener structural representation of the present invention;

Fig. 2 is the angle of blade and the operation chart on abutment.

Fig. 3 is four pictures that 100X observes down under the stereomicroscope;

Fig. 4 has provided the picture that edge fitness and shoulder sharpener survey edge fitness are surveyed in conventional preparation;

Fig. 5 adopts the shoulder sharpener to handle the contrast picture of front and back;

Fig. 6 is the front elevation of shoulder sharpener blade, and wherein, the AB straight line is represented the blade edge, and AA1, BB1 represent circular arc blade edge, and A1A2 is blade progressive additive zone, and the long 2.5mm in this zone is connector under this zone, R (being arc radius)=AO=A1O=0.5mm.

Fig. 7 is the positive side view of blade, wherein, presents arc surface from C1 to the C blade; Thickness is attenuation gradually, and BC is a right-half plane circular arc knife-edge, from C1 to BB1 thickness gradually the cambered surface attenuation until knife-edge; From C1 to B1D1 circular arc join domain thickness for reducing along cambered surface gradually; B2D2 blade thickness, thickness＞2mm is the connector part below connecing.

Fig. 8 is the practical operation sketch map.

The present invention is described further with concrete experiment below in conjunction with embodiment.

The specific embodiment

Shoulder sharpener of the present invention, its mentality of designing are to utilize sharp blade and shoulder structure to have a certain degree, and under the pressure of appropriateness, on shoulder, slide, thereby it is smooth that shoulder is planed, and be smooth, continuously.

As depicted in figs. 1 and 2; The shoulder sharpener that present embodiment provides is an integral structure; Be divided into handle section 4, changeover portion 3, bending section 2 and active section 1, the angle between changeover portion 3 and the bending section 2 is more than or equal to 150 ° and less than 180 °, and the angle between bending section 2 and the active section 1 is 90 °～150 °; The end of active section 1 is a blade, and the basil of blade is greater than 15 ° and less than 90 °.

The length of handle section 4 is 12cm～20cm, and the length of described changeover portion 3 is 2cm～5cm, and the length of bending section 2 is 1.5cm～3cm, and the length of active section 1 is 0.8cm～2cm.

Below provide concrete preparation process:

1, handle design:

Handle 4 requires hollow, and is light, and surperficial abrasionproof is handled, and diameter reaches more than the 1cm, and purpose is that in use moment is enough big at the shoulder sharpener, to increase this instrument handling on physician's hand, improves grinding efficiency; Two angle of bend that exist between handle section 4 and the active section 1 (are that angle between changeover portion 3 and the bending section 2 is more than or equal to 150 ° and less than 180 °; Angle between bending section 2 and the active section 1 is 90 °～150 °); The angle that meets clinically manual apparatus commonly used can make things convenient for the doctor in the shoulder sharpener uses, to walk around adjacent teeth and hides and stop.

2, the design of the terminal blade of active section 1:

Referring to pressing Fig. 6 and Fig. 7, wherein, Fig. 6 is the front elevation of shoulder sharpener blade, and the AB straight line is represented the blade edge; AA1, BB1 represent circular arc blade edge, and A1A2 is blade progressive additive zone; The long 2.5mm in this zone is connector under this zone, R (being arc radius)=AO=A1O=0.5mm.Fig. 7 is the positive side view of blade, presents arc surface from C1 to the C blade, and thickness is attenuation gradually; BC is a right-half plane circular arc knife-edge; From C1 to BB1 thickness gradually the cambered surface attenuation until knife-edge, from C1 to B1D1 circular arc join domain thickness for reduce B2D2 blade thickness gradually along cambered surface; Thickness＞2mm is the connector part below connecing.This blade is to satisfy clinical desired different shoulder forms; Blade two ends wire lengths (blade width) are that 1mm-2mm is to satisfy the requirement of the different shoulder width with backteeth of labial teeth; And the different materials dummy is to the demands of different of shoulder width; Blade width is 2mm among Fig. 6, when width reduces, and other parameter constants; R is proportional to be reduced, and is about 1/4 of blade width all the time; Form two faces of blade, can be V-shaped, also can appear and face directly and curved surface combination tooth shape (like Fig. 2); Consider the ground effect and self anti-wear performance that guarantee blade, 15 °＜blade angle＜90 °; Blade two initiating terminals circle is blunt, and the coupling part thickness＞0.5cm of handle and blade is with proof strength.

Below be the shoulder sharpener clinical trial result that the inventor provides:

Select the blue preliminary grinding car of MANI commonly used clinically pin grinding dentin for use; Be divided into four groups then at random, every group six example, one group is that contrast is not handled; Its excess-three group is selected red polishing respectively for use; (operation of shoulder sharpener is as shown in Figure 8) handled in yellow polishing, shoulder sharpener, observes surface topography respectively and measures its roughness.Find relatively that through experiment smoothness behind the shoulder sharpener grinding dentin can reach the effect of yellow polishing car pin; 100X observes (as shown in Figure 3) down under the stereomicroscope: measure four groups roughness; The result is following: shoulder sharpener group 1.16450; Red polishing group 3.39467, yellow polishing group 1.04100, matched group 5.58933.SPSS software carries out multiple comparisons demonstration between one factor analysis of variance and group; Shoulder sharpener group and yellow polishing group are not seen difference; All there is significant difference in all the other each groups, can think that the polishing effect of shoulder sharpener has reached the ground effect of clinical yellow polishing car pin.

The clinical effectiveness of shoulder sharpener is following: choose six stripped maxillary central incisors; Conventional abutment preparation is to yellow polishing; Duplicate cast is not directly made wax pattern, casting cobalt chromium substrate crown; And measure the gap die at shoulder edge, and under stereomicroscope, observe and measurement with the silicone rubber impression method.Six abutment shoulder files are measured the internal clearance data with quadrat method after handling, two groups of front and back contrast carrying out statistical analysis.The microscopically effect is following:

Six central incisors, every tooth equidistance is chosen 6 point measurement internal clearances (cheek side, nearly cheek side; Nearly tongue side, tongue side, tongue side far away; Cheek side far away), totally 36 data are measured this 36 some internal clearances respectively before and after the shoulder sharpener is handled; Two groups of data typing SPSS statistics softwares also carry out statistical analysis, and the result is as shown in table 1.

Table 1: shoulder internal clearance silicon rubber thin film thickness before and after the shoulder sharpener is handled (μ m, x ± s)

Before the shoulder sharpener is handled	After the shoulder sharpener is handled
		77.52±3.50	33.77±2.16

Cochrome internal clearance meansigma methods before and after the shoulder sharpener is handled is respectively 77.52 μ m and 33.77 μ m, and the T-test of two independent small sample mean comparisons shows and has significant significant difference (p＜0.01) between two groups.The actual clinical effect is quite significantly (like Fig. 5) also, therefore, the shoulder sharpener can be effectively with the concave convex texture planing of shoulder smoothly, make its edge clear, complete.

Claims

1. shoulder sharpener; It is characterized in that this shoulder sharpener is an integral structure, be divided into handle section (4), changeover portion (3), bending section (2) and active section (1); Angle between described changeover portion (3) and the bending section (2) is more than or equal to 150 ° and less than 180 °; Angle between bending section (2) and the active section (1) is 90 °～150 °, and the end of active section (1) is a blade, and the basil of blade is greater than 15 ° and less than 90 °.

2. shoulder sharpener as claimed in claim 1; It is characterized in that the length of described handle section (4) is 12cm～20cm, the length of described changeover portion (3) is 2cm～5cm; The length of described bending section (2) is 1.5cm～3cm, and the length of described active section (1) is 0.8cm～2cm.