Medina-Solís C E, Mendoza-Rodríguez M, Márquez-Rodríguez S, De la Rosa-Santillana R, Islas-Zarazua R, Navarrete-Hernández J-D J, Maupomé G
Avenida del Álamo # 204, Fraccionamiento Paseo de los Solares, Colonia Santiago Tlapacoya, CP 42110, Pachuca de Soto, Hidalgo, México.
Academic Area of Dentistry of Health Sciences Institute at Autonomous University of Hidalgo State, Pachuca, Hidalgo, Mexico.
West Indian Med J. 2014 Aug;63(4):354-8. doi: 10.7727/wimj.2013.242. Epub 2014 May 8.
The aim of this study was to determine the reasons for which erupted third molars (3M) are extracted in a sample of Mexican patients.
A retrospective cross-sectional study was performed on a sample of 83 patients attending exodontia (minor oral surgery) clinics of a public university in Mexico (Autonomous University of Hidalgo State). The outcome variable was the reason for extractions using Kay and Blinkhorn's classification. The independent variables were age, gender, arch and tooth number according to the World Health Organization (WHO). For statistical analysis, we used the Chi-squared test in Stata 9.0.
Eighty-three patients underwent 150 3M extractions. Mean age was 38.67 ± 13.96 years, and 71.1% were female. The four reasons for 3M extraction were prosthetic (44.0%), followed by orthodontic (24.7%), dental caries (20.0%) and periodontal disease (11.3%). Differences were observed in the reasons for 3M extractions across age groups (p < 0.05). No significant differences existed between men and women (p > 0.05), or the WHO tooth number (p > 0.05).
Women and patients 18 to 34 years of age had erupted 3M extracted more frequently, primarily for prosthetic reasons. The age profile indicated a trend in demand for services that differ from those of overall tooth extractions, but not for the trend across gender.
本研究的目的是确定在一组墨西哥患者样本中拔除已萌出第三磨牙（3M）的原因。
对墨西哥一所公立大学（伊达尔戈州自治大学）口腔外科（小型口腔手术）诊所的83例患者样本进行了一项回顾性横断面研究。结果变量是使用Kay和Blinkhorn分类法的拔牙原因。自变量是根据世界卫生组织（WHO）确定的年龄、性别、牙弓和牙位。为进行统计分析，我们在Stata 9.0中使用了卡方检验。
83例患者共拔除150颗3M。平均年龄为38.67±13.96岁，71.1%为女性。3M拔牙的四个原因依次为修复（44.0%）、正畸（24.7%）、龋齿（20.0%）和牙周病（11.3%）。不同年龄组的3M拔牙原因存在差异（p<0.05）。男性和女性之间（p>0.05）以及WHO牙位之间（p>0.05）不存在显著差异。
女性以及18至34岁的患者拔除已萌出3M的频率更高，主要是出于修复原因。年龄分布表明对服务的需求趋势与总体拔牙情况不同，但性别趋势并无差异。
