Custom implant for reconstruction of mandibular continuity defect

Publication date: Available online 13 December 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Sang-Woon Lee, Hyung Giun Kim, Min Ji Ham, Do Gia Khang Hong, Seong-Gon Kim, Horatiu Rotaru
PurposeThe purpose of this study was to compare the daily food intake rate and the rate of screw loosening between two groups of rabbits with mandibular continuity defects: a custom implant group and a 5-hole mini-plate group.Materials and MethodsTwo types of cylindrical implants were printed and their physical strength was compared. In a study using rabbits, one group (CI, n=5) received a custom implant for the reconstruction of a mandibular continuity defect and the other group (RP, n=5) received a 5-hole mini-plate without a bone graft. After reconstruction, the daily food intake rate and the rate of screw loosening were examined after operation. Histological exam for the CI group was done at 3 months after the operation.ResultsThe design which mimicked the mandible showed greater physical strength. The date required for 50% recovery was faster in the CI group than that in the RP group (P=0.011). The total number of loosened screws for the CI group was lower than that for the RP group at 3 months post-operative (P=0.008). New bone formation in the porous custom implant was evident in the CI group.ConclusionRabbits with mandibular continuity defects treated with custom implants for reconstruction showed faster recovery of daily food intake rate and fewer loosened screws than those treated by a 5-hole mini-plate without bone graft.



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