903 cases of clinical observation of radio frequency treatment of Otorhinolaryngology disease Selected Papers of the contemporary five blind subjects. Jinan: Shandong Science and Technology Press, 1995. i [2] Hao-dong. shot in the ENT [J]. Foreign Medical Journal of Lang Kedan book .2000,24 (2): 1Ol a 102 (lotus Date I2ooO ~ O7 os) [ ,],[root had screw； own attack pattern nail} tooth residual crown prince Yu points approached Lou No.: R783.3 Document code: B Article ID； 1008-2409 (2001) 02-0204-02 Ji bed due to caries, trauma causes severe defects in the formation of residual crown of anterior teeth is not uncommon, often involving the cutting angle, and the pulp is often exposed to suffer from {Chung dye. the author since 1997, the joint application root thread to nail their own attack patterns nail light curing composite resin one-time repair of such cases, follow-up 1 to 2 years after repair, 48 Ho 52 ten teeth, more satisfactory results are as follows. 3O down 1 Materials and Methods 1.1 General information on 48 cases in men, women l8 inverted f age l8 ~ 57-year-old central incisor on the neck of which residual crown and 24 down, residual crown l8 maxillary lateral incisors down maxillary tooth loss of residual crown l0 down. above residual crown defect area of 1/2 to 3 / ~~ 1.2 Material root had screw R1120 type RIIS0 of type (Hangzhou New Asia Instrument Instrument Factory), HXL-ll00-type teeth with self-tapping screw self-threading retention ie, their own attack pattern nail (the Hangzhou New Asia Instrument maple plant ) resin 3MZ100TMRestorative, 3MSingleBondAdhesive.I.3 method of repair before X-ray film, to repair the anterior teeth of residual crown conventional root treatment, the observed 1 to 2 weeks after clinical symptoms according to the X-ray film, the root of past the thickness,north face sale, length,ugg boots italia, choose slightly larger than the diameter of the root canal drill, the preparation of the root channel, channel depth control {the BI about 2 / ’3 root canal length, the appropriate choice of the root had nose shank nails according to the residual tooth tissue the specific circumstances to choose the right attack shank nails, usually a 10 Cutaway defect choose 1 or 2 a nail, in principle, be able to achieve the minimum number of retention, while able to maintain nail the Distance> 2mm disinfection of the root and separated from wet to reconcile into a thin-shaped zinc phosphate cement placed in channels and selection of the root had nose pattern nailed, screw fixed through the special handle, holding the cement junction solid shield, remove the excess around part of the operation course of action should be slow, while paying close attention to feel tight when should promptly reverse 1/4 to 1/2 circle, E, {relieve stress, to prevent root crack. select the appropriate twist drill, the use of mobile phones slow Cutaway tooth loss in the residual crown butterfly The nature of the appropriate parts of the production nail a204 Road. requirements of the position of the screw channel enamel dentine within the boundary of 0.5 ~ 1.0mm dentin, direction and tooth shape, especially the root parallel, rather than the long axis parallel with the tooth. In order to prevent the expansion of the screw channel, Gentiana Gu continuous time pressure to reach the desired depth,moncler outlet, then follow the same direction to exit the screw channel, and then stall. will select their own attack pattern nail with a wrench spin the screw channel. operation by hand {Chung control in the nail to reach the bottom of the pin tract, the Kennedy sense of feast resistance is breaking away from the place. repair material requirements and occlusion, cover the nail top repair material thickness should be> 1.5 ~ 2ram’1_t nail place, the more than reach the requirements,moncler mont, false nails to repair the body part to reduce moth bending 3M resin requirements for light curing repair, remodeling to restore the anatomy of the teeth-shaped Jie, tune jf purpose,Moncler T?rkiye, polished to complete the repair 2 2.I efficacy standards: juniper moving to repair the body with no loss, Xin irregular dense Gehao the color unchanged. failure: prosthesis loose or fall off the edge of the gingival not close together, the color change .2.2 repair Results 1 to 2 years of follow-up, successful 48 down, 4 head chewing the excellent food caused by the prosthesis part off failure, success rate was 92.3. discussion the 3.I I used root canal usurp shank nails, self-tapping shank nails are tapping pattern type. attack pattern root canal nail nails had solidified the force of the biggest of all types of roots, the surface of the light oar cements nail phase compared to a difference of 6 to 8 times, or even 1O times (in dentin nail, it is assumed that nail diameter and the screw channel depth, self-tapping shank nails retentive force revolves around solid nail 5 to 6 times, friction town stapled 2 to 3 times, so their own attack pattern nail retention force is also the largest [1]. the attack pattern type root nails because of their coarse, retention greater than dentin nail II], play a major retention role in the prosthesis, the nails of their own attack patterns play a supporting retention role - at the same time prevents the rotation of the prosthesis should be noted that the attack pattern based root canal nail