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Three-dimensional analysis of maxillary stability after Le Fort I osteotomy using hydroxyapatite/poly-L-lactide plate.

 Jung-Hyun Park  ;  Minkyu Kim  ;  Sang Yoon Kim  ;  Hwi-Dong Jung  ;  Young-Soo Jung 
 Journal of Cranio-maxillo-facial Surgery, Vol.44(4) : 421-426, 2016 
Journal Title
 Journal of Cranio-maxillo-facial Surgery 
Issue Date
Absorbable Implants ; Bone Plates ; Bone Screws ; Cephalometry ; Follow-Up Studies ; Humans ; Imaging, Three-Dimensional* ; Mandible/surgery ; Maxilla/diagnostic imaging ; Maxilla/surgery* ; Osteotomy, Le Fort/methods* ; Polyesters ; Postoperative Complications ; Treatment Outcome
Biodegradable ; Le Fort I osteotomy ; Orthognathic surgery ; Stability ; Three-dimensional analysis
PURPOSE: To evaluate three-dimensional change in maxillary position using biodegradable plates. MATERIAL AND METHODS: A total of 53 patients who underwent orthognathic surgery using biodegradable plates were analyzed retrospectively. The position of maxilla was measured three-dimensionally using cone beam computed tomography data at preoperative (T0), 1-month postoperative (T1), and 1-year postoperative (T2) time points. Changes in the maxilla 1 year after the operation (T2-T1) were analyzed to demonstrate postoperative stability. The correlation between postoperative relapse (T2-T1) and surgical movement (T1-T0) of the maxilla was investigated. RESULTS: At 1-year postoperatively, no significant changes in maxillary position were noted in the antero-posterior and transverse dimensions. The anterior maxillary position in the vertical dimension also showed no significant changes, but the posterior maxillary position (posterior nasal spine, greater palatine foramen) showed a 0- to 2.98-mm relapse at 1-year postoperatively. The posterior maxilla tended to relapse inferiorly when the amount of surgical upward movement was greater than 3-3.5 mm and to relapse superiorly when the amount of surgical upward movement was less than 3-3.5 mm. For all patients, no postoperative complications in the osteofixated maxilla were observed during the follow-up period. CONCLUSION: Maxilla fixed with biodegradable plates was stable in the antero-posterior and transverse and the vertical (anterior maxilla) dimensions. Posterior maxillary vertical relapse was clinically acceptable, but relapse patterns that relate to the amount of surgical upward movement should be considered for surgical treatment planning.
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2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
Jung, Young Chul(정영철)
Jung, Hwi Dong(정휘동) ORCID logo https://orcid.org/0000-0003-1025-8323
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