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Impact of patients′ demographic characteristics on operative difficulty of impacted mandibular third molar

DONG Jian-hui, ZHU Ya-qin   

  1. Department of General Dentistry, School of Stomatology, the Ninth People′s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
  • Online:2014-02-28 Published:2014-03-25


Objective To analyze the effect of patients′ age, sex, height, and body mass index (BMI) on the impacted mandibular third molar surgery. Methods Patients who needed third molar extractions were selected. The correlation of patients′ age, sex, weight, height, BMI and operation time was determined by Spearman′s rank correlation coefficient analysis. Statistically significant variables were selected for linear regression analysis. Results A total of 370 patients were enrolled. Only patients′ age showed a statistically significant correlation with operation time (P<0.001). Linear regression analysis indicated that patients′ age contribute 30.8% risk of increased operation time (β= 0.308, P<0.001). Conclusion Patients′ age is an important factor for affecting the operative difficulty of the impacted mandibular third molar.

Key words: impacted mandibular third molar, operation time, surgical difficulty