분할골절단술후 고정방법에 따른 전단강도 비교
A Comparative Study on Shear Strength According to Fixation Methods After Split Osteotomy
구강과학- 전남대학교 2001년 13권 3호 p.361 ~ 370
송종운, 박영준, 김용남,
소속 상세정보
송종운 ( ) - 전남대학교 치의학연구소
박영준 ( ) - 전남대학교 치과대학 구강악안면외과학교실
김용남 ( ) - 전남대학교 치의학연구소
KMID : 0988420010130030361
Abstract
Purpose : the purpose of the present study was to compare the shear strength of the three techniques for the fixation of simulated sagittal split ramus osteotomies in terms of their ability resist vertical loads.
Materials and Methods : Fifteen bovine ribs of similar size and shape were subjected to uniform osteotomies resembling a sagittal split ramus osteotomy. They were divided into three groups as wire, screw and plate group. The osteotomitized fragments were fixed with 18 gauge stainless steel wire, three bicortical screws, and with a 4-hole miniplate and monocortical screws in the wire, secrw and plate group respectively. The fixed bovine rib specimens were secured in a jig, subjected to vertical loads, and evaluated for mean shear strength at failure and for mean weight resisted by the wire, screw, and miniplate.
Results : The mean weight resisted by the wire, screw and miniplate was (1.01±0.40g/㎣), (8.87±3.95g/㎣) and (6.93±2.82g/㎣) respectively. The mean weight resistances in the screw and miniplate group were significantly higher than those of the wire group (p＜0.05). But no significant differences existed between the screw and plate group (p>0.05).
Conclusion : These results suggest that the both screw and miniplate fixation have higher mean weight resistances than wire fixation and both methods would be much better for rigid internal fixation than wire fixation after sagittal split ramus osteotomy.
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