21，Armstrong R A, BrickleyM R, Evans D J et al.Patient perceptions regarding the risks of morbidity andcomplications of lower third molar removal. Community Dent Health,1996;13(1):17.
32，Checchi L, Bonetti G A, Pelliccio G A.Removing high risk impacted mandibular thirdmolar.JADA.,1996;127:1214.
43，Ham J W.An evaluation of handpiece sterilization for periapical surgery. J OralSurg,1970;28:353 .
54，Kilpatrick H C.Removal of impacted third molar utilizing speed up to 200000 r.p.m.Oral Surg,1958;11:364.
65， Knoll- Kohler E, Knoller M, Brandt K et al. Cardiohenodynamic and serumcatecholamine response to surgical removal of impacted mandibular third molars under localanesthesia: A randomized double-blind Parallel group and crossover study.J Oral Maxillofac Surg,1991;49(9):957.
76，Mercier P, Precious D.Risk and benefits of removal of impacted third molars. Acritical review of the literature. Int J Oral Maxillofac Surg,1992;21(1):17.
87，Pell W R.Report on a ten year study of a tooth division technique for the removal ofimpacted teeth.Am J Orthod,1942;28:660.
98，Robinson P.P，Smith K.G.Lingual nerve damage during lower third molar removal-acomparison of two surgical methods. Br Dent J, 1996;180(12): 456.
109，Rounds W R.Principle and technique of exodontia. Ed 1, Mosby:Louis,1953:p334-345.
