Bhat Preethi, Cariappa K M
Department of Oral and Maxillofacial Surgery, D.A.P.M.R.V. Dental College, Bangalore, 560078 India.
J Maxillofac Oral Surg. 2012 Sep;11(3):304-8. doi: 10.1007/s12663-012-0335-0. Epub 2012 Feb 19.
(1) To determine the incidence of inferior alveolar nerve (IAN) deficits following surgical extraction of mandibular third molar. (2) To document recovery of IAN injuries.
A total of 400 lower third molars were extracted, 205 male patients and 195 females. All underwent extraction by the prescribed buccal approach. All cases were examined by one examiner preoperatively and postoperatively, at 7 days, one month, two months and six months. Two-point discrimination test (2-pd), brush stroke direction (BSD), contact detection, pin prick and thermal testing was carried out.
One patient presented with IAN injury (0.25%). This single case of nerve injury was mesioangular, Level B, Class 2, impaction with a difficulty rating of 5. Levels A and B tests (2PD, BSD, Contact detection) were altered. In these tests, the IAN did not show any signs of recovery by six months. Level C tests (pin prick test, sharp blunt detection) showed that the nerve had recovered completely by two months.
（1）确定下颌第三磨牙手术拔除后下牙槽神经（IAN）缺损的发生率。（2）记录IAN损伤的恢复情况。
共拔除400颗下颌第三磨牙，男性患者205例，女性患者195例。所有患者均采用规定的颊侧入路进行拔除。所有病例均由一名检查者在术前、术后7天、1个月、2个月和6个月进行检查。进行两点辨别试验（2-pd）、笔触方向（BSD）、接触检测、针刺和热测试。
1例患者出现IAN损伤（0.25%）。这例单一的神经损伤为近中角位，B级，2类，阻生，难度评级为5级。A级和B级测试（2PD、BSD、接触检测）结果发生改变。在这些测试中，到6个月时IAN未显示任何恢复迹象。C级测试（针刺试验、锐钝检测）显示神经在2个月时已完全恢复。
