Department of Oral and Maxillofacial Surgery, Prosthodontics and Special Dental Care, University Medical Center Utrecht, The Netherlands.
Int J Oral Maxillofac Surg. 2010 Oct;39(10):962-7. doi: 10.1016/j.ijom.2010.06.001. Epub 2010 Jul 7.
In this study the authors evaluate and quantify the residual bony defect in the mandibular symphysis and its effect on the soft tissue contour a minimum of 1 year after harvesting chin bone. 59 ASA I cleft lip and palate patients, aged 8-19 years were included. In all patients an autologous bone graft from the mandibular symphysis was harvested for transplantation to the alveolar cleft. Lateral cephalograms were used to measure the donor site defects, and the effects on the soft tissue contour. An evident residual defect was measured at the donor site 1 year after harvesting chin bone. A significant relation was seen between age at time of surgery and size of the defect 1 year postoperatively. In older patients a larger defect remained. Using the current surgical technique of harvesting chin bone, complete bony repair of the defect was not achieved. This study shows postoperatively persisting defects that comprise on average 14% of the original peroperative defects. A significant increase in soft tissue thickness was seen at the mandibular symphysis at a minimum of 1 year postoperatively. These changes in the soft tissue chin contour 1 year after harvesting bone are similar to normal growth changes.
本研究评估和量化了颏骨采集后至少 1 年下颌骨联合处残余骨缺损及其对软组织轮廓的影响。59 例 ASA I 唇腭裂患者，年龄 8-19 岁。所有患者均取自体下颌骨骨移植至牙槽裂。使用侧位头颅侧位片测量供体部位缺损，并观察其对软组织轮廓的影响。颏骨采集 1 年后，供体部位可见明显的残余缺损。手术时年龄与术后 1 年缺损大小呈显著相关。年龄较大的患者，缺损较大。采用目前颏骨采集的手术技术，不能完全修复骨缺损。本研究表明，术后存在的缺陷平均占术前缺陷的 14%。颏骨采集后至少 1 年，下颌骨联合处软组织厚度显著增加。颏骨采集后 1 年，软组织轮廓的这些变化与正常生长变化相似。
