Long R E, Paterno M, Vinson B
Lancaster Cleft Palate Clinic, PA 17601, USA.
Cleft Palate Craniofac J. 1996 May;33(3):225-30. doi: 10.1597/1545-1569_1996_033_0225_eocpit_2.3.co_2.
This investigation was to determine the relationship between the success of secondary alveolar bone grafting and the position of the permanent cuspid relative to the cleft at the time of grafting. In this retrospective study utilizing periapical radiographs take on cleft patients to evaluate bone grafting results, the subjects were patients treated at the Lancaster Cleft Palate Clinic, a private institution specializing in the care of cleft patients. Sixty-seven patients (20 BCLP; 47 UCLP) were selected for this study based on availability of quality radiographs and a minimum of 6-month post-surgical follow-up. All patients underwent alveolar bone grafting (mean age, 10 years 7 months). Presurgical radiographs were taken within 3 months of the operation. Post-surgical radiographs were taken to evaluate the outcome of grafting (mean follow-up, 2 years 10 months). Radiographs were traced and digitized on a total of 86 cleft sites. Presurgically, a ratio was used to determine the amount of cuspid crown emerged through the alveolus into the cleft site relative to the anatomic cuspid-crown length. Post-surgically, ratios of bone support for the teeth mesial and distal to the cleft were established by dividing the amount of root covered by bone by the anatomic root length. Ratios expressing the height of alveolar crest relative to the cementoenamel junction (CEJ) of adjacent teeth and amount of alveolar notching relative to the mesial tooth root length were also evaluated. Linear regressions of each of the five ratios of graft outcome on the cuspid-eruption ratio were done. No significant correlations could be found between final graft success and the amount of cuspid crown exposed in the cleft at the time of grafting. Cuspid position could not be shown to be a significant factor in determining graft success.
本研究旨在确定二期牙槽骨植骨成功与植骨时恒牙尖牙相对于腭裂的位置之间的关系。在这项回顾性研究中，利用腭裂患者的根尖片来评估骨移植结果，研究对象为在兰开斯特腭裂诊所接受治疗的患者，该诊所是一家专门治疗腭裂患者的私立机构。基于高质量根尖片的可用性以及至少6个月的术后随访，选取了67例患者（20例双侧唇腭裂；47例单侧唇腭裂）进行本研究。所有患者均接受了牙槽骨植骨（平均年龄为10岁7个月）。术前根尖片在手术3个月内拍摄。术后根尖片用于评估植骨结果（平均随访时间为2年10个月）。共对86个腭裂部位的根尖片进行了描图和数字化处理。术前，使用一个比率来确定相对于尖牙冠的解剖长度，尖牙冠通过牙槽突进入腭裂部位的露出量。术后，通过将被骨覆盖的牙根量除以解剖牙根长度，建立腭裂近中和远中牙齿的骨支持比率。还评估了表示牙槽嵴相对于相邻牙齿牙骨质釉质界（CEJ）的高度以及相对于近中牙根长度的牙槽切迹量的比率。对植骨结果的五个比率中的每一个与尖牙萌出比率进行了线性回归分析。最终植骨成功与植骨时腭裂处暴露的尖牙冠量之间未发现显著相关性。尖牙位置在决定植骨成功方面未被证明是一个重要因素。
