Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Universidade Federal do Rio de Janeiro, Brazil.
Eur J Orthod. 2013 Aug;35(4):491-9. doi: 10.1093/ejo/cjs025. Epub 2012 Apr 26.
This systematic review identified and qualified the current evidence of dental root damage and repair after contact with mini-implants. The electronic databases Cochrane library, Ovid, Scirus, Scopus, and Virtual Health Library were used to search original articles from 1980 to December 2011. The inclusion criteria to select the articles were 1. randomized controlled trials and prospective clinical studies based on trials involving humans, 2. randomized controlled studies in animals, 3. use of mini-implants with a diameter less than 2.5 mm, and 4. root contact evaluation associated with the use of orthodontic mini-implants. Two authors independently reviewed and extracted data from the selected studies and a methodological quality assessment process was used to rank the studies classifying them as low moderate or high quality. The searches retrieved 579 citations. After initial selection, 17 studies were considered eligible and their full texts were assessed. Four of those were excluded because root damage was not evaluated and two were excluded because of overlapping samples. Eleven articles, nine in animals and two in humans, fulfilled the inclusion criteria. From these, two studies were ranked as presenting high methodological quality, eight were judged to be of moderate, and one of low quality. The evidence found suggested that the quality of root repair depends on the amount of damage caused by the mini-implant. When the damage is limited to the cementum or dentin, healing and almost complete and repair of the periodontal structure can occur. Mini-implants that injured the pulp were less likely to result in complete repair of the periodontal tissues.
这篇系统评价确定和评估了微型种植体接触后对牙根损伤和修复的当前证据。通过电子数据库 Cochrane 图书馆、Ovid、Scirus、Scopus 和 Virtual Health Library 检索了从 1980 年到 2011 年 12 月的原始文章。选择文章的纳入标准为：1. 基于人类试验的随机对照试验和前瞻性临床研究；2. 动物的随机对照研究；3. 使用直径小于 2.5 毫米的微型种植体；4. 与使用正畸微型种植体相关的牙根接触评估。两位作者独立地对所选研究进行了审查和提取数据，并采用方法学质量评估过程对研究进行分类，将其归类为低、中或高质量。检索到了 579 条引文。经过初步选择，有 17 项研究被认为符合条件，并对其全文进行了评估。其中 4 项因未评估牙根损伤而被排除，2 项因样本重叠而被排除。11 篇文章，9 篇为动物实验，2 篇为人的实验，符合纳入标准。其中有 2 项研究被评为具有高方法学质量，8 项为中等质量，1 项为低质量。研究结果表明，牙根修复的质量取决于微型种植体造成的损伤程度。当损伤仅限于牙骨质或牙本质时，愈合和牙周结构的几乎完全修复可以发生。损伤牙髓的微型种植体不太可能导致牙周组织的完全修复。
