Czochrowska E M, Stenvik A, Album B, Zachrisson B U
Department of Orthodontics and the Department of Oral Surgery and Oral Medicine, University of Oslo, Norway.
Am J Orthod Dentofacial Orthop. 2000 Dec;118(6):592-600. doi: 10.1067/mod.2000.110521.
The published literature contains no comprehensive studies that compare the outcome of premolar autotransplantation to the maxillary anterior region with natural incisors in the same patients. This article describes the gingival and periodontal conditions around premolars transplanted to the maxillary incisor region, subsequent to restoration. Forty-five premolars autotransplanted to the maxillary incisor region in 40 adolescent patients were evaluated after a mean observation period of 4.0 years. Mean age at surgery was 11.0 years. Established clinical criteria were used to assess tooth mobility, plaque and gingival indexes, probing pocket depth, and percussion. Recession and hyperplasia of interproximal gingival papillae were assessed according to a recently proposed index. Standardized radiography was used to evaluate presence of pathosis, pulp obliteration, root length, and crown-root ratios. Clinical variables for transplants did not differ from those of the natural incisors, except for increased mobility and more plaque in a few transplanted premolars. The interproximal gingival papillae adjacent to all transplanted teeth were normal or slightly hyperplastic. Radiographically, all transplants showed varying degrees of pulp obliteration, but no signs of pathosis. Crown-root ratios were similar for natural and transplanted teeth as were distances from cementoenamel junction to marginal bone. The overall status of the transplanted premolars and surrounding tissues indicated that this treatment modality may be recommended when maxillary incisors are missing in adolescents. In addition, tooth transplantation represents an inherent potential for bone induction and reestablishment of a normal alveolar process.
已发表的文献中没有全面的研究来比较前磨牙自体移植到上颌前部区域与同一患者天然切牙的结果。本文描述了移植到上颌切牙区域的前磨牙修复后的牙龈和牙周状况。对40例青少年患者中自体移植到上颌切牙区域的45颗前磨牙进行了平均4.0年的观察期评估。手术时的平均年龄为11.0岁。采用既定的临床标准评估牙齿松动度、菌斑和牙龈指数、探诊袋深度及叩诊情况。根据最近提出的指数评估邻间牙龈乳头的退缩和增生情况。使用标准化X线摄影评估病变的存在、牙髓闭锁、牙根长度和冠根比。除了少数移植的前磨牙松动度增加和菌斑较多外，移植牙的临床变量与天然切牙的变量没有差异。所有移植牙相邻的邻间牙龈乳头正常或轻度增生。X线片显示，所有移植牙均有不同程度的牙髓闭锁，但无病变迹象。天然牙和移植牙的冠根比以及从牙骨质釉质界到边缘骨的距离相似。移植前磨牙及其周围组织的总体状况表明，当青少年上颌切牙缺失时，这种治疗方式可能是可取的。此外，牙齿移植具有诱导骨形成和重建正常牙槽突的内在潜力。
