Aziz Tehnia, Flores-Mir Carlos
Division of Orthodontics, Department of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada.
Aust Orthod J. 2011 May;27(1):33-9.
To determine if an association exists between appliance-induced labial movement of mandibular incisors and gingival recession.
Electronic databases were searched for studies with the terms: 'incisor', 'incisor proclination', 'tooth movement', 'orthodontic tooth movement', 'gingival recession' and 'orthodontic appliance'. The original articles and abstracts that met the initial inclusion criteria were retrieved, and their references hand searched for possible articles missed by the database searches. Inclusion criteria included human studies that suggested a link between labial movement of lower incisors produced by orthodontic treatment and gingival recession. Exclusion criteria included significant intrusion or extrusion of the mandibular incisors, periodontal disease, subjects taking medication that affects gingival health and subjects with systematic diseases.
Seven articles fulfilled the selection criteria. Gingival recession after labial movement of lower incisors was assessed on dental casts, intra-oral slides, lateral cephalograms and gingival examination. The articles were analysed to determine the impact of their treatment methodology on the outcomes.
No association between appliance-induced labial movement of mandibular incisors and gingival recession was found. Factors that may lead to gingival recession after orthodontic tipping and/or translation movement were identified as a reduced thickness of the free gingival margin, a narrow mandibular symphysis, inadequate plaque control and aggressive tooth brushing.
确定矫治器引起的下颌切牙唇向移动与牙龈退缩之间是否存在关联。
在电子数据库中检索包含以下术语的研究：“切牙”“切牙前倾”“牙齿移动”“正畸牙齿移动”“牙龈退缩”和“正畸矫治器”。检索符合初始纳入标准的原始文章和摘要，并手动搜索其参考文献以查找数据库搜索可能遗漏的相关文章。纳入标准包括表明正畸治疗导致下切牙唇向移动与牙龈退缩之间存在关联的人体研究。排除标准包括下颌切牙明显的垂直压低或伸长、牙周疾病、正在服用影响牙龈健康药物的受试者以及患有系统性疾病的受试者。
七篇文章符合选择标准。通过石膏模型、口内幻灯片、头颅侧位片和牙龈检查评估了下切牙唇向移动后的牙龈退缩情况。对这些文章进行分析以确定其治疗方法对结果的影响。
未发现矫治器引起的下颌切牙唇向移动与牙龈退缩之间存在关联。正畸倾斜和/或平移移动后可能导致牙龈退缩的因素包括游离龈缘厚度减小、下颌骨联合狭窄、菌斑控制不足和刷牙用力过猛。
