Zawawi Khalid H, Al-Zahrani Mohammad S
Department of Orthodontics, Faculty of Dentistry, King Abdulaziz University, PO Box 80209, Jeddah 21589, Kingdom of Saudi Arabia. Tel. +966 (12) 6402000 Ext. 20388. Fax. +966 (12) 6403316. E-mail.
Saudi Med J. 2014 Nov;35(11):1378-83.
To study the association between gingival biotypes and inclination and position of the maxillary and mandibular incisors.
This cross-sectional study included 142 consecutive orthodontic patients (64 males and 78 females) who were seeking orthodontic treatment at the Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia from February 2013 to January 2014. Gingival biotype was assessed independently for the maxillary and mandibular central incisors using the transparency of periodontal probe method. Maxillary and mandibular incisors' inclination and position were measured using cephalometric analysis.
The mean age was 23.56 (±2.55) years. The prevalence of thin gingival biotype was 43% for the maxillary and 52.1% for the mandibular incisors. Females were 4 times more likely to have thin gingiva for the maxillary incisors and 5 times more likely for the mandibular incisors. A significant association was found between mandibular incisor inclination and position and thin gingival biotype, while there was no association between the maxillary incisor inclination and position and gingival biotypes.
Mandibular incisor proclination and protrusion is associated with thin gingival biotype while no association is found in the maxilla. The evaluation of the gingival biotype is essential during diagnosis and treatment planning for potential orthodontic patients.
研究牙龈生物型与上颌及下颌切牙倾斜度和位置之间的关联。
这项横断面研究纳入了2013年2月至2014年1月期间在沙特阿拉伯吉达阿卜杜勒阿齐兹国王大学牙科学院寻求正畸治疗的142例连续正畸患者（64例男性和78例女性）。使用牙周探针透明度法对上颌和下颌中切牙的牙龈生物型进行独立评估。采用头影测量分析法测量上颌和下颌切牙的倾斜度和位置。
平均年龄为23.56（±2.55）岁。上颌切牙薄牙龈生物型的患病率为43%，下颌切牙为52.1%。女性上颌切牙出现薄牙龈的可能性是男性的4倍，下颌切牙则为5倍。发现下颌切牙倾斜度和位置与薄牙龈生物型之间存在显著关联，而上颌切牙倾斜度和位置与牙龈生物型之间无关联。
下颌切牙前倾和前突与薄牙龈生物型相关，而上颌未发现这种关联。在对潜在正畸患者进行诊断和治疗计划时，评估牙龈生物型至关重要。
