Plakwicz Paweł, Czochrowska Ewa Monika
Department of Periodontology and Oral Mucosa Diseases, Medical University of Warsaw, Warsaw, Poland.
J Clin Periodontol. 2014 May;41(5):489-96. doi: 10.1111/jcpe.12243. Epub 2014 Mar 16.
To determine the periodontal status and long-term outcomes of the surgical treatment of severely impacted developing premolars.
Nine impacted and adversely angulated second premolars (four maxillary and five mandibular) were autotransplanted from their initial position to the ideal position within the arches (trans-alveolar autotransplantation). The mean age of patients at the time of the surgery was 13 years and 9 months (from 11 years and 5 months to 17 years) and the mean observation period was 5 years (from 2 to 8 years and 6 months). Naturally erupted, contralateral premolars in the same patients were used for comparison.
The survival and success were 100%. Autotransplanted premolars did not differ statistically from their controls, except for having a wider zone of keratinized gingiva (mean difference 0.625 mm), increased probing depths (from 0.04 to 0.49 mm depending on the probing location), pulp canal obliteration and a slightly higher crown-to-root ratio (C/R = 0.71 for transplanted teeth and C/R = 0.6 for control teeth respectively).
Trans-alveolar transplantation of severely impacted and adversely angulated developing premolars is a viable treatment option and an attractive alternative to other treatment modalities.
确定严重阻生的正在发育的前磨牙手术治疗的牙周状况和长期预后。
9颗阻生且牙轴异常的第二前磨牙（4颗上颌和5颗下颌）从其初始位置自体移植至牙弓内的理想位置（经牙槽骨自体移植）。手术时患者的平均年龄为13岁9个月（范围为11岁5个月至17岁），平均观察期为5年（范围为2年至8年6个月）。同一患者自然萌出的对侧前磨牙用作对照。
移植牙的存活率和成功率均为100%。除角化龈区更宽（平均差异0.625mm）、探诊深度增加（根据探诊部位，增加0.0-4至0.49mm）、牙髓腔闭塞以及冠根比略高（移植牙的冠根比分别为0.71，对照牙为0.6）外，自体移植的前磨牙与对照牙在统计学上无差异。
严重阻生且牙轴异常的正在发育的前磨牙经牙槽骨移植是一种可行的治疗选择，也是其他治疗方式的有吸引力的替代方法。
