Oral Rehabilitation, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Orthodontics, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Clin Oral Implants Res. 2017 Dec;28(12):1560-1566. doi: 10.1111/clr.13026. Epub 2017 Jun 18.
This follow-up study (1) compares tooth displacement of central incisors in patients with and without pre-implant orthodontic treatment and (2) investigates whether sex, age, or orthodontic retention have an effect on tooth displacement after the insertion of single-crown implants.
Fifty-seven patients - thirty-seven with (test group) and twenty without pre-implant orthodontic treatment (control group) - were rehabilitated with 89 single-crown implants in the upper maxilla. Clinical and radiographic data, clinical photographs, and dental casts were collected during baseline examinations after prosthetic rehabilitation and at the final follow-up examination at least 5 years later. A total of 114 dental casts were digitalized and aligned using a software program to measure changes in the positions of the central incisors.
After a follow-up period of at least five years, 87% of the central incisors measured in the test group were displaced >0.25 mm vertically compared with 70% in the control group. Seventy-eight percent of the test group teeth had moved >0.25 mm horizontally compared with 55% in the control group. These differences were not significant, and there were no significant correlations with patient age or sex.
The majority of patients had minor vertical (60%) or horizontal (67%) tooth displacement of the central incisors (0.25-0.75 mm) after a minimum follow-up period of 5 years. This study found no significant differences in tooth displacement comparing patients with and without pre-implant orthodontic treatment. No significant effect of sex, age, orthodontic retention, or implant location was observed on tooth displacement.
本随访研究（1）比较了接受和未接受种植前正畸治疗的患者的中切牙牙位移情况，（2）调查了性别、年龄或正畸保持是否会影响单冠种植体植入后的牙齿位移。
57 名患者 - 37 名接受（实验组）和 20 名未接受种植前正畸治疗（对照组） - 在上颌骨中接受 89 个单冠种植体修复。在修复后和至少 5 年后的最终随访检查中，收集了临床和影像学数据、临床照片和牙模。共对 114 个牙模进行了数字化处理和对齐，使用软件程序测量中切牙位置的变化。
经过至少 5 年的随访期，实验组中 87%的中切牙垂直位移>0.25mm，对照组为 70%。实验组中 78%的牙齿水平移动>0.25mm，对照组为 55%。这些差异无统计学意义，且与患者年龄或性别无显著相关性。
大多数患者在至少 5 年的随访期后，中切牙有轻微的垂直（60%）或水平（67%）牙位移（0.25-0.75mm）。本研究发现，接受和未接受种植前正畸治疗的患者之间的牙齿位移无显著差异。性别、年龄、正畸保持或种植体位置对牙齿位移无显著影响。
