下颌第三磨牙与下颌角和髁状突骨折关系的研究  

Relationship between the presence of mandibular third molars and fractures of the mandibular angle and condyle

作　　者：曲昌锋[1] 郭哲[1] 陆平[1] 周晓南[1] 汪崇[1] 

机构地区：[1]大连市中心医院口腔颌面外科,辽宁大连116033

出　　处：《中国美容整形外科杂志》2013年第2期71-73,共3页Chinese Journal of Aesthetic and Plastic Surgery

摘　　要：目的以往研究证明阻生下颌第三磨牙增加了下颌角骨折的风险同时降低了髁状突骨折的发生率。本研究旨在证明这种关系并从下颌第三磨牙的位置等角度进一步阐述下颌第三磨牙与下颌角和髁状突骨折的关系。方法本组568例下颌骨骨折患者，从致伤原因、下颌第三磨牙的位置和骨折部位等方面进行分析研究。结果阻生下颌第三磨牙组下颌角骨折发生率明显高于非阻生下颌第三磨牙组；而非阻生下颌第三磨牙组髁状突骨折发生率则明显高于阻生下颌第三磨牙组。阻生下颌第三磨牙属于Ⅱ类和B类时下颌角骨折的发生率最高，而髁状突骨折发生率最低。结论下颌第三磨牙是影响下颌角和髁状突骨折的重要因素，而且取决于下颌第三磨牙的位置。阻生下颌第三磨牙是下颌角骨折的危险因素，同时也降低了髁状突骨折的发生率。Objective Previous studies have shown that impacted mandibular third molars increase the risk of mandibular angle fractures and decrease the risk of mandibular condylar fractures. This study attempted to verify these relationships and identify the influence of mechanism. Methods A review of 568 cases with mandibular fractures was presented with respect to cause of fractures, location of mandibular third molars and pattern of fractures. Results Patients with impacted mandibular third molars were more at risk of mandibular angle fractures than those without impacted third molars. An inverse relationship was seen for condylar frac-tures. The highest risk of mandibular angle fractures was observed in patients with impacted mandibular third molars position of Class Ⅱd Class B. Conclusion Mandibular third molars are a dominant factor for mandibular angle and condylar fractures and the risk is dependent on mandibular third molars position.

关 键 词：下颌第三磨牙 下颌角骨折 髁状突骨折 

分 类 号：R782.4[医药卫生—口腔医学]