CN2097620U

CN2097620U - Surgical drill for artificial embedding tooth

Info

Publication number: CN2097620U
Application number: CN 91214714
Authority: CN
Inventors: 周继明; 雷露春; 陈继镛; 张兴栋
Original assignee: CHENGDU MEASURING AND CUTTING; Sichuan University
Current assignee: CHENGDU MEASURING AND CUTTING; Sichuan University
Priority date: 1991-07-11
Filing date: 1991-07-11
Publication date: 1992-03-04

Abstract

The utility model relates to a surgical drill for artificial embedding teeth, which belongs to a medical surgical tool for oral cavities. The utility model is composed of a working part (1), a neck part (2) and a handle part (3), wherein the tail end of the handle part (3) is provided with a positioning groove (4) and a locking part (5) which are not matched with an international standard contra-angle handpiece. The front angle gamma of a main cutting edge (6) of a drill bit forms an angle of 22 DEG to 27 DEG. With the surface treatment technology, the surface of the surgical drill is plated with claddings, such as chromium claddings or titanium claddings; a secondary edge (8) can be arranged on a rear side surface (7). The utility model has the advantages of quick feeding of the drill bit, labour saving for cutting, less damage to gingiva and jaw bone tissue, favorable survival rate for embedding teeth and enhanced durability of the surgical drill; a cutting edge is still sharp after the utility model is used for 20 to 30 times, and the utility model can be repeatedly used after sterilization.

Description

Surgical drill for artificial embedding tooth

This utility model belongs to the oral medical operation tool, and is boring when mainly being suitable for planting the artificial tooth in the oral cavity.

Along with developing rapidly of oral implantology, worked out different materials both at home and abroad, the Dental Implant of different shape, its type has helical form, column or the like.The inventor has proposed a kind of column Dental Implant in application number is 91107151.2 patent application, but domestic still do not have a supporting with it operation tool, external Switzerland Ceramed company has produced a kind of drill bit of doing the operation of helical form Dental Implant that is mainly used in, and the shank that is provided with locating slot and lock portion by working portion, cervical region, afterbody constitutes.Because this bit diameter is less, its main cutting edge adopts less anterior angle, is generally 19 °～20 °.This is the principle according to general metalworking Tool Design, and guaranteeing what drill bit intensity designed, thereby cutting edge is not really sharp, makes gingiva and jawbone surrounding tissue be subjected to bigger damage easily.Secondly, consider the antirust requirement of operation tool sterilization, drill bit adopts rustless steel to make.But because the drill bit that general hardenable rustless steel is made is softer, again without surface treatment, thereby not wear-resisting, promptly do not scrapped with 3～5 times at most owing to cutting edge is sharp, use uneconomical.

The purpose of this utility model is exactly in order to overcome the deficiency of above-mentioned prior art, provides that a kind of cutting edge is sharp, cutting is brisk, and is little to gingiva and mandibular organization's damage, and durable, the canine implant surgical drill that can use repeatedly.

This utility model has improved the angle of drill bit main cutting edge anterior angle γ under the less situation of surgical drill diameter, be 22 °～27 ° with its increase; To material of main part is that stainless surgical drill adopts process for treating surface to plate covering, to improve the surgical drill performance.After adopting technique scheme, during operation the drill bit feed brisk, cut laborsaving.Drill bit hardness can reach HRC58 °～60 °, has improved service life widely, and cutting edge is still sharp after using 20～30 times.Thereby drill bit can reuse after sterilization, and both suitable oral cavity doctor's usefulness can reduce patient's medical expense again.Drill bit has also improved after surface treatment by strengthening anterior angle and has caused the problem that weakens edge strength.In operation process, sharp drill bit can shorten operating time, and is particularly little to gingiva and mandibular organization's damage, is beneficial to surviving of postoperative Dental Implant, and can alleviates patient's misery.

Fig. 1 is the front view of Dental Implant surgical drill.

Fig. 2 is the vertical view of Dental Implant surgical drill shank.

Fig. 3 is the vertical right view of Dental Implant surgical drill.

Below in conjunction with accompanying drawing this utility model is described in detail.

The Dental Implant surgical drill is by work part (1), and cervical region (2) and shank (3) constitute.The tail end of shank (3) is provided with locating slot (4) and locking part (5), and this is in order to be used and to be provided with the special-purpose acute angle handpiece in oral cavity.The work of drill bit partly has helicla flute on (1).Its helical angle equates basically with the angle of main cutting edge ［ 6 ］ anterior angle γ.Brisk for the time cutting of holing, drill bit adopts bigger anterior angle, generally is designed to 22 °～26 °, is preferably made 25 °.Surgical drill work partly other geometric parameter of (1) can be selected in the span of common fluted drill, elects 118 ° as such as drift angle 2 φ.

The material of main part of surgical drill adopts rustless steel, can select 9Cr18 or Ni-Cr rustless steel for use, and at this moment the hardness of drill bit is HRC50 °～55 °.Drill bit shapes the back and plates covering with process for treating surface.A kind of method is to adopt galvanoplastic to plate dark chromium on the surgical drill surface, and thickness of coating is 2～3 μ m.Drill bit hardness can reach HRC58 ° after this method is handled; More better method is to adopt high-temperature vacuum evaporation technology for plating titanium in surgical drill surface titanizing, and thickness of coating is 1～2 μ m, and drill bit hardness can reach HRC60 °.Another advantage of titanizing is, because titanium is the good metal of a kind of biocompatibility, it is topped stainless steel base contact the safety of increase surgical drill use with osseous tissue to prevent harmful metal ion.

In order to make the surgical drill cutting edge sharper, reduce the wearing and tearing of cutting edge, drill bit work partly (1) vertical trailing flank (7) increased secondary put the first edge on a knife or a pair of scissors (8).

In order to adapt to the artificial tooth who plants different size, this utility model has designed plurality of specifications.Its diameter range is from 2～4.5mm; Length range is from 30～35mm.

Because the surgical drill size is less, preferably adopt integral body to grind technology processing, can guarantee the precision and the surface smoothness of drill bit effectively.

This utility model is applicable to the international standard acute angle handpiece.

Claims

1, a kind of surgical drill that is used for canine implant is made of working portion [1] and shank [3], and the shank tail end is provided with locating slot [4] and locking partly [5], it is characterized in that work partly [1] upward the anterior angle γ of main cutting edge [6] be 22 °～27 °; Adopt process for treating surface to plate covering on the surgical drill surface.

2, surgical drill according to claim 1 is characterized in that said to plate covering with process for treating surface be at the dark chromium layer of surgical drill electroplating surface, or at surgical drill surface titanium-nitride layer.

3, surgical drill as claimed in claim 1 or 2 is characterized in that drill bit work partly has secondary sword (8) on (1) vertical trailing flank (7).