Long-term Stability after Reduction of Mandible Fracture by Keyhole Plate: Evaluation at the Time of Plate Removal

Kyeong-Jun Cheon; Seoung-Won Cho; Won-Seok Jang; Ju-Won Kim; Byoung-Eun Yang

doi:10.1186/s40902-020-00251-w

Long-term Stability after Reduction of Mandible Fracture by Keyhole Plate: Evaluation at the Time of Plate Removal

Maxillofac Plast Reconstr Surg. 2020 Mar 16;42(1):6. doi: 10.1186/s40902-020-00251-w. eCollection 2020 Dec.

Authors

Kyeong-Jun Cheon^{1

2

3}, Seoung-Won Cho^{1

2

3}, Won-Seok Jang^{1

2

3}, Ju-Won Kim^{1

2

3}, Byoung-Eun Yang^{1

2

3}

Affiliations

¹ 1Department of Oral and Maxillofacial Surgery, Hallym University College of Medicine Sacred Heart Hospital, Anyang, Republic of Korea.
² 2Graduate School of Clinical Dentistry, Hallym University, Chuncheon, Republic of Korea.
³ 3Institute of Clinical Dentistry, Hallym University, Chuncheon, Republic of Korea.

Abstract

Background: Various types of miniplates have been developed and used for the reduction of facial bone fractures. We introduced Yang's Keyhole (YK) plate, and reported on its short-term stability. The purpose of this study was to evaluate the long-term stability of the YK plate, as a follow-up study, by examining the patients who had used the YK plate among the patients with the reduction of mandible fractures and who visited for plate removal.

Methods: We reviewed the medical records of 16 patients who underwent mandibular fracture fixation using a YK plate (group I) and 17 patients who underwent mandibular fracture fixation using a conventional plate (group II). Assessment was then made on malunion, occlusal stability, discomfort during the application, and clinical symptoms.

Results: From January 2015 to December 2017, a total of 36 patients underwent mandibular fracture surgery using a YK plate. A total of 16 patients received plate removal. Among them, 15 were male and 1 female. The average age was 26 years. The applied surgical sites were the 12 on mandibular angle, 4 on mandibular symphysis, and 2 on subcondyle. The application period of YK plate was an average of 335 days. During the same period, 45 people underwent surgery on the conventional plate. A total of 17 patients received plate removal. Among them, 15 were male and 2 females. The average age was 36 years. The applied surgical sites were the 8 on mandibular angle, 4 on mandibular symphysis, and 2 on subcondyle. The application period of the conventional plate was an average of 349 days. No malocclusion occurred at the time of removal, and occlusion was stable. No patient complained of joint disease or discomfort.

Conclusion: The YK plate system, in which the screw was first inserted and the plate was applied, for clinical convenience did not cause any particular problem and no significant difference from the conventional plate.

Keywords: Mandibular fractures; Open reduction and internal fixation; Plate removal; Yang’s Keyhole plate.