Ali Ibrahim K, Sansare Kaustubh, Karjodkar Freny R, Salve Prashant, Vanga Kavita, Pawar Ajinkya M
Department of Oral Medicine and Radiology, Nair Hospital Dental College, Mumbai, Maharashtra, India.
Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, Maharashtra, India.
Dent Traumatol. 2017 Aug;33(4):276-280. doi: 10.1111/edt.12336. Epub 2017 Apr 27.
BACKGROUND/AIMS: There is a paucity of literature on external auditory canal (EAC) fractures secondary to maxillofacial trauma, with most of the literature on EAC fractures consisting of isolated case reports. To the authors' best knowledge, this is the first study to use cone beam computed tomography to evaluate the EAC region. The aim of this study was to assess the prevalence of external auditory canal (EAC) fracture following maxillofacial trauma and to evaluate the association between EAC fracture and other maxillofacial fractures and the region of trauma.
One hundred patients were prospectively evaluated over 6 months from February to August 2016. The patients were referred for CBCT regarding temporomandibular joint or condylar fractures following maxillofacial trauma. Two observers (both experienced radiologists) assessed the EAC and associated fractures in the maxillofacial region.
External auditory canal (EAC) fracture was confirmed in 32% of the patients. Of the EAC fractures, 68.75% and 31.25% were associated with mandibular fractures and non-mandibular fractures, respectively. Of the EAC fractures, 68.75% were single fractures and 31.25% of patients had multiple comminuted fractures. Significant association was observed on cross-tabulation of the fractured region and region of trauma with the presence of EAC fracture using chi-square test.
External auditory canal (EAC) fracture is associated with maxillofacial fractures with increased incidence in mandibular fractures compared to non-mandibular fractures.
背景/目的：关于颌面创伤继发外耳道（EAC）骨折的文献较少，大多数关于EAC骨折的文献都是孤立的病例报告。据作者所知，这是第一项使用锥形束计算机断层扫描来评估EAC区域的研究。本研究的目的是评估颌面创伤后外耳道（EAC）骨折的患病率，并评估EAC骨折与其他颌面骨折及创伤区域之间的关联。
从2016年2月至8月的6个月内对100例患者进行前瞻性评估。这些患者因颌面创伤后颞下颌关节或髁突骨折而接受锥形束计算机断层扫描（CBCT）检查。两名观察者（均为经验丰富的放射科医生）评估了颌面区域的EAC及相关骨折情况。
32%的患者确诊有外耳道（EAC）骨折。在EAC骨折患者中，分别有68.75%和31.25%与下颌骨骨折和非下颌骨骨折相关。在EAC骨折患者中，68.75%为单一骨折，31.25%的患者有多发性粉碎性骨折。使用卡方检验对骨折区域和创伤区域与EAC骨折的存在情况进行交叉列表分析时，观察到显著相关性。
外耳道（EAC）骨折与颌面骨折相关，与非下颌骨骨折相比，下颌骨骨折的发生率更高。
