Shivashankara C, Manjunatha B S, Tanveer Ahmed
K M Shah Dental College & Hospital, Pipariya, 391760, Waghodia (T), Vadodara (D), Gujarat State, India.
Oral Maxillofac Surg. 2012 Mar;16(1):153-5. doi: 10.1007/s10006-011-0284-7. Epub 2011 Jun 24.
A tooth is ectopic if it is malpositioned due to congenital factors or displaced by the presence of pathology. Recent literature review suggests only 14 cases of ectopic mandibular third molar in the condylar region. Most have been treated using an extra-oral or endoscopic approach. Patients with an ectopic tooth impaction can remain asymptomatic over the course of their lifetime. But when such a tooth is accompanied by a cyst, patients can experience significant morbidity and require intervention.
This report presents a case of ectopic mandibular third molar in the left subcondylar region associated with pain and trismus.
Ectopic eruption of teeth is rare and reported in the mandibular condyle, coronoid process, orbit, palate, nasal cavity, nasal septum, chin and the maxillary antrum. Management of such cases should be meticulously planned on the basis of the position and type of the ectopic tooth and related potential trauma which could be caused by surgical intervention.
如果牙齿由于先天性因素而位置异常或因病变而移位，则为异位牙。最近的文献综述显示，仅14例下颌第三磨牙异位至髁突区。大多数病例采用口外或内镜手术治疗。异位阻生牙患者在其一生中可能一直无症状。但当这样的牙齿伴有囊肿时，患者可能会出现明显的病变并需要干预。
本报告介绍了1例左侧髁突下区下颌第三磨牙异位并伴有疼痛和牙关紧闭的病例。
牙齿异位萌出很少见，报道发生在下颌髁突、冠突、眼眶、腭部、鼻腔、鼻中隔、颏部及上颌窦。此类病例的治疗应根据异位牙的位置和类型以及手术干预可能引起的相关潜在创伤进行精心规划。
