CAJ | 학술논문

背景：锁定重建接骨板已应用于髋臼后壁骨折的治疗，但关于其固定髋臼后壁骨折生物力学稳定性的研究报道甚少。目的：比较锁定重建接骨板、重建接骨板及单纯拉力螺钉固定髋臼后壁骨折的生物力学稳定性。 　　方法：取成人新鲜半骨盆标本18个，制成髋臼后壁骨折模型，随机分成三组。A组用2枚拉力螺钉固定，B组用重建接骨板固定，C组用锁定重建接骨板固定。进行轴向加载实验，测定各组骨折的纵向位移、内固定失效时的载荷及轴向刚度，以比较各内固定方式的稳定性。 　　结果：在相同载荷下，B组、C组骨折的纵向位移小于A组，B组、C组内固定失效时的载荷及轴向刚度大于A组，有统计学差异（P＜0.05）；B组与C组在纵向位移、内固定失效时的载荷及轴向刚度之间无统计学差异（P＞0.05）。 　　结论：锁定重建接骨板与重建接骨板的内固定稳定性优于单纯拉力螺钉内固定，锁定重建接骨板与重建接骨板内的固定稳定性相似，均可用于髋臼后壁骨折的内固定治疗。
배경：쇄정중건접골판이응용우관구후벽골절적치료，단관우기고정관구후벽골절생물역학은정성적연구보도심소。목적：비교쇄정중건접골판、중건접골판급단순랍력라정고정관구후벽골절적생물역학은정성。 　　방법：취성인신선반골분표본18개，제성관구후벽골절모형，수궤분성삼조。A조용2매랍력라정고정，B조용중건접골판고정，C조용쇄정중건접골판고정。진행축향가재실험，측정각조골절적종향위이、내고정실효시적재하급축향강도，이비교각내고정방식적은정성。 　　결과：재상동재하하，B조、C조골절적종향위이소우A조，B조、C조내고정실효시적재하급축향강도대우A조，유통계학차이（P＜0.05）；B조여C조재종향위이、내고정실효시적재하급축향강도지간무통계학차이（P＞0.05）。 　　결론：쇄정중건접골판여중건접골판적내고정은정성우우단순랍력라정내고정，쇄정중건접골판여중건접골판내적고정은정성상사，균가용우관구후벽골절적내고정치료。
Background:Locking reconstruction plates have been used to treat acetabular posterior wall fractures. But there are few re-ports on the biomechanic stability of acetabular posterior wall fractures fixed with locking reconstruction plate. Objective: To compare the biomechanic stability of acetabular posterior wall fractures fixed with locking reconstruction plate, reconstruction plate or lag screw. Methods: Acetabular posterior wall fractures were induced in 18 adult fresh semipelvis specimens, and then divided into three groups randomly. The fractures were fixed with two lag screws in group A, with reconstruction plate in group B, and with locking reconstruction plate in group C. The longitudinal displacements, loading of failed internal fixation and axial stiffness were measured by axial loading experiments and compared between groups. Results:Under the same loading, longitudinal displacements of group B and C were shorter than that of group A (P<0.05). The maximum load and axial stiffness of group B and C were larger than those of group A (P<0.05). However, there were no significant differences in the longitudinal displacements, loading of failed internal fixation and axis stiffness between group B and C (P>0.05). Conclusions:For the acetabular posterior wall fractures, locking reconstruction plate and reconstruction plate internal fixa-tion can provide greater stability than simple lag screws. And the biomechanic stability of internal fixation with locking re-construction plate is similar to reconstruction plate. They can be used for internal fixation management of the posterior wall acetabular fractures.