Cheung L K, Samman N, Tong A C, Tideman H
Department of Oral and Maxillofacial Surgery, University of Hong Kong, China.
J Oral Maxillofac Surg. 1994 Apr;52(4):373-80; discussion 381. doi: 10.1016/0278-2391(94)90440-5.
A retrospective study was made of 22 consecutive patients who underwent mandibular reconstruction with a Dacron (Osteo-mesh, Xomed Inc, Jacksonville, FL) tray technique from September 1988 to April 1992. Free autogenous iliac bone, in the form of particulate cancellous chips and marrow, was densely packed into the Dacron tray, that was adapted to bridge the mandibular segmental defect. Sixteen cases underwent uneventful healing with the formation of a continuous bony bridge and union with the remaining mandible. The pattern of bone remodeling and rate of resorption in these cases were assessed by sequential panoramic radiographs taken up to 3 years postoperatively. The mean horizontal dimension of the mandibular defects was 75 mm and the mean vertical reconstructed height was 25 mm. When the grafted bone was radiographically of uniform density, it progressed into a mature trabecular pattern matching that of the normal mandible. However, when there were areas of radiolucency, most likely from inadequate condensation of the graft, such areas were not replaced by bone in the long term. The bony height at both ends and the middle of the reconstructed segment underwent reasonably even resorption and retained about 80% of the bony height over a 3-year period. The rate of resorption was highest in the first 6 months and stabilized at about 2 years. There were six failures, all showing significant irregular bony resorption prior to tray removal.
对1988年9月至1992年4月期间连续22例采用涤纶（Osteo-mesh，Xomed公司，佛罗里达州杰克逊维尔）托盘技术进行下颌骨重建的患者进行了回顾性研究。将游离自体髂骨以颗粒状松质骨碎片和骨髓的形式紧密填充到涤纶托盘中，该托盘用于修复下颌骨节段性缺损。16例患者愈合顺利，形成了连续的骨桥并与剩余下颌骨愈合。通过术后长达3年的系列全景X线片评估这些病例的骨重塑模式和吸收速率。下颌骨缺损的平均水平尺寸为75 mm，平均垂直重建高度为25 mm。当移植骨在X线片上密度均匀时，它会发展为与正常下颌骨相匹配的成熟小梁模式。然而，当存在透光区时，很可能是由于移植骨压缩不足，这些区域长期不会被骨替代。重建节段两端和中间的骨高度吸收较为均匀，在3年期间保留了约80%的骨高度。吸收速率在最初6个月最高，约2年后稳定下来。有6例失败，均在取出托盘前出现明显的不规则骨吸收。
