4Obimakinde OS, Fasola AO, Arotiba JT, et al. Comparative effect of tube drain on post-operative inflammatory complications of impacted mandibular third molar surgery [ J]. Niger Postgrad Med J, 2010, 17(30) : 194 - 199. G.
5botolorun MO, Arotiba GT, Ladelnde AL. Assessment of factors associated with surgical difficulty in impacted mandibular third molar extraction[J]. J Oral Maxillofac Surg, 2007, 65 (10) : 1977 - 1983.
6Akadiri OA, Obiechina AE. Assessment of difficulty in third molar surgery -a systematic review[ J]. J Oral Maxillofac Surg, 2009, 67 (4) : 771 -774.
7Akadiri OA, Obiechina AE, Arotiba JT, et al. Relative impact ofpatient characteristics and radiographic variables on the difficulty of removing impacted mandibular third molars [ J ]. J Contemp Dent Pract, 2008, 9(4) : 51 -58.
8Renton T. Factors predictive of difficulty of mandibular third molar surgery[J]. Br Dent J, 2001, 190(11): 607 -610.