Modified paranasal bone grafting reduced vertical maxillary recurrence after Le Fort Ⅰ osteotomy

doi:10.19438/j.cjoms.2023.02.011

Abstract

Abstract: PURPOSE: To evaluate if the modified paranasal bone grafting can reduce the recurrence of Le Fort I osteotomy for maxillary downward. METHODS: A total of 30 patients with a large maxillary downward movement (>3 mm) during orthognathic surgery were included in the study. Patients were divided into modified paranasal bone grafting group and non-modified paranasal bone grafting group. Three-dimensional measurements of the maxillary position were taken using maxillofacial CT data at preoperative(T0), 3 days postoperatively(T1), and 6 months postoperatively (T2). Meanwhile, CT scans of T1 and T2 were used to calculate the changes in bone thickness. SPSS 22.0 software package was used for data analysis. RESULTS: At 6 months after operation, in the vertical direction, the recurrence amount of U1 in the modified paranasal bone grafting group was (0.54±0.35)mm, and the recurrence amount of U1 in the non-modified paranasal bone grafting group was (1.18±0.76)mm(P=0.3997). There was no significant difference in recurrence between the two groups in the anteroposterior and horizontal directions. In the modified group, the bone graft thickness was reduced by (11.75±6.25)%, and that of the non-modified group was (33.77±11.56)%(P<0.0001). CONCLUSIONS: Modified nasal bone graft can effectively reduce the absorption of bone graft and decrease the vertical recurrence of maxilla.

Key words: Paranasal bone grafting, Recurrence, 3D analysis, Le Fort I osteotomy, Orthognathic surgery

CLC Number:

R782.2

GE Wei-wen, QI Lei, WANG Yun, ZHANG Lei. Modified paranasal bone grafting reduced vertical maxillary recurrence after Le Fort Ⅰ osteotomy[J]. China Journal of Oral and Maxillofacial Surgery, 2023, 21(2): 163-167.

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