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Abstract
A STUDY OF EMINECTOMY FOR 12 CASES WITH
MANDIBULAR DISLOCATION IN OUR HOSPITAL
Noriaki AOKI 1 ）, Soichiro Ishii 1 ）, Yuri WADA 2 ）, Yasuaki OHKUMA 1 ）,
Himiko UMEZAWA 1 ）, Junichi BABA 3 ）, Shinsuke OHTA 2 ）
1）
Department of Oral and Maxillofacial Surgery, Saiseikai Yokohamashi Nanbu Hospital
2）
Department of Oral and Maxillofacial Surgery, Yokohama Sakae Kyosai Hospital, Federation
of National Public Service Personnel Mutual Associations
3）
Department of Oral and Maxillofacial Surgery,
Yokohama City University Graduate School of Medicine
4）
Division of Pediatric Endocrinology and Metabolism,
Children’s Medical Center, Osaka City General Hospital
Eminectomy for patients with mandibular dislocation has been introduced as a useful surgical modality for
habitual, long-standing, temporomandibular joint dislocation. However, complications have rarely been reported.
The aim of this study was to investigate the complications and problems associated with eminectomy. Twelve
consecutive patients underwent eminectomy between 2012 and 2020; 11 of the 12 cases were medically compromised
patients with conditions, such as dementia, Parkinson's disease, brain disease, and heart disease. Three had a
dislocated mandible for two weeks or longer, and manual reduction of the temporomandibular joint had been
ineffective. Eminectomy was performed alone in 11 cases, but eminectomy and condylectomy were needed in one
case. The procedures were successful in all 12 patients without recurrence. Concerning complications, 2 cases
showed surgical site infections, and one case showed weakness of the temporal branch of the facial nerve, which
recovered fully 3 months after surgery. Eminectomy is minimally invasive and very useful, and it is a reliable method
for patients with difficulty in self-reduction and those with habitual temporomandibular joint dislocation. However,
postoperative infections need to be prevented, taking into account preexisting conditions and activities of daily living
of the patients.
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