Department of Orthodontics, Queen Mary Hospital NHS Trust, Sidcup, Kent, UK.
Eur J Orthod. 2011 Jun;33(3):298-304. doi: 10.1093/ejo/cjq071. Epub 2010 Sep 5.
The aim of this study was to evaluate survival and success rates following autotransplantation of permanent maxillary canine teeth. Sixty-three cases of maxillary canine autotransplantation from 49 subjects (mean age at transplantation 21.8 years, range 13-42.1 years) undertaken between 1977 and 2003 were collected as part of an audit project of transplantation success. All maxillary canines had complete root development at the time of transplantation. The sample was divided into two groups, a matched case-control study to compare 27 unilateral transplanted canines with the non-transplanted canine on the contralateral side, and all 63 transplanted canines with no controls. Teeth were assessed clinically using established criteria for success: tooth presence for survival and resorption, mobility, probing pocket depth (PPD), gingival bleeding, vitality, and colour. Radiographic investigation for success assessed internal and external inflammatory resorption (including the amount) bone levels and any signs of pathology. Data were described with descriptive statistics and analytical tests were used to assess frequencies of occurrence. The survival rate was 83 per cent with an average duration of 14.5 years in situ. Thirty-eight per cent of the transplants were deemed successful. There were statistically significant associations between the transplanted and non-transplanted teeth in PPD (P = 0.006), gingival bleeding (P = 0.006), vitality (P = 0.004), and colour (P = 0.002). Autotransplantation of impacted maxillary canines can be successful in the long term and may be indicated in selected cases. Although the rate for complete success in this study was low (no signs of resorption, mobility, and sound periodontal tissues), the survival rate can be considered favourable when evaluating autotransplantation as a treatment option for grossly malpositioned canines with little scope for orthodontic alignment.
本研究旨在评估上颌恒尖牙自体移植后的存活率和成功率。作为一项移植成功率审计项目的一部分，我们收集了 1977 年至 2003 年间进行的 49 名患者（平均移植年龄 21.8 岁，范围 13-42.1 岁）的 63 例上颌恒尖牙自体移植病例。所有上颌尖牙在移植时均具有完全的牙根发育。该样本分为两组，一组是单侧移植尖牙与对侧未移植尖牙的配对病例对照研究，另一组是所有 63 例移植尖牙无对照的研究。采用既定的成功标准对牙齿进行临床评估：存活和吸收、松动、探诊袋深度（PPD）、牙龈出血、活力和颜色。影像学调查评估成功的标准包括内部和外部炎症性吸收（包括数量）、骨水平和任何病理迹象。数据采用描述性统计进行描述，并使用分析测试评估发生率。存活率为 83%，平均在位时间为 14.5 年。38%的移植牙被认为是成功的。移植牙和未移植牙的 PPD（P = 0.006）、牙龈出血（P = 0.006）、活力（P = 0.004）和颜色（P = 0.002）之间存在统计学显著关联。上颌恒尖牙的自体移植在长期内是可以成功的，并且在某些情况下可能是指征。尽管本研究中完全成功的比率较低（无吸收、松动和牙周组织健康的迹象），但当评估自体移植作为严重错位的恒尖牙的治疗选择时，其存活率可以被认为是有利的，因为这些牙齿的正畸排列空间很小。
