Self-reinforced biodegradable screw fixation compared with titanium screw fixation in mandibular advancement
Self-reinforced biodegradable screw fixation compared with titanium screw fixation in mandibular advancement
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DOI：
10.1016/j.joms.2005.09.011
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发表时间：
2006-01-01
影响因子：
1.9
通讯作者：
Proffit, WR
中科院分区：
文献类型：
--
作者：
Turvey, TA;Bell, RB;Proffit, WR
目的：本报告比较了2个相似队列接受双侧下颌骨矢状截骨术的骨骼稳定性和治疗结局。研究组包括患者稳定与2毫米自增强聚乳酸（PLLDL 70/30），可生物降解螺钉（组B），2毫米钛螺钉放置在一个位置的时尚（组T）。材料和方法：69例患者进行了双侧下颌升支矢状截骨术的进步，利用相同的技术。B组34例，T组35例。每例患者的术前、术后即刻、夹板取出和术后1年头影测量X线片可用于分析。分析方法和治疗结局参数与之前使用的相同。重复测量的方差分析进行了与固定的手段作为受试者之间的因素和时间作为受试者内的因素。结果：T组无1例临床失败，B组1例临床失败。两组之间稳定性的平均差异很小，下颌角的差异也很小。两组术后变化相似，唯一有统计学意义的差异是角突的垂直位置（P
Purpose: This report compares the skeletal stability and treatment outcomes of 2 similar cohorts undergoing bilateral sagittal osteotomies of the mandible for advancement. The study groups included patients stabilized with 2-mm self-reinforced polylactate (PLLDL 70/30), biodegradable screws (group B), and 2-mm titanium screws placed in a positional fashion (group T).Materials and Methods: Sixty-nine patients underwent bilateral sagittal osteotomies of the mandibular ramus for advancement utilizing an identical technique. There were 34 patients in group B and 35 patients in group T. Each patient had preoperative, immediate postoperative, splint out, and I-year postoperative cephalometric radiographs available for analysis. The method of analysis and treatment outcomes parameters are identical to those previously used. Repeated measures analysis of variance was performed with means of fixation as the between-subject factor and time as the within subject factor. The level of significance was set at .01.Results: There were no clinical failures in group T and a single failure in group B. The average difference in stability between the groups is small and subtly different at the mandibular angle. The data documented similarity of the postsurgical changes in the 2 groups with the only statistically significant difference being the vertical position of the gonion (P