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Improved accuracy of hemimandibular reconstructions involving the condyle by utilizing hydroformed reconstruction plates rather than hand‐bent stock plates
Author(s) -
Ong Hui Shan,
Liu Jian Nan,
Ahmed Abdelrehem,
Qu Xing Zhou,
Wan Kenneth,
Xie Dong Ping,
Zhang Chen Ping
Publication year - 2019
Publication title -
head and neck
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.012
H-Index - 127
eISSN - 1097-0347
pISSN - 1043-3074
DOI - 10.1002/hed.25809
Subject(s) - condyle , cad , medicine , orthodontics , computer aided , engineering drawing , computer science , engineering , programming language
Background Computer‐aided design/computer‐aided manufacturing (CAD/CAM) surgical templates allow precise mandibular reconstructive surgery. However, their clinical accuracy is limited by manual plate bending. Digitally hydroformed plates maintain a digital workstream in virtual planning. Methods Twelve patients with Brown's class IIc mandibular defects were randomized into two groups: group I (experimental), the reconstruction plate was digitally hydroformed, and group II (control), surgeries were performed CAD/CAM guided with the reconstruction plate manually prebent. The linear and angular deviations of reconstruction outcomes were compared to surgical simulation in both groups. Results The mean linear and angular deviations of middle and posterior segments were 2.14 ± 0.79 mm, 3.71 ± 0.95 mm, 8.73° ± 1.91°, and 9.06° ± 0.96° in group I and 4.31 ± 0.78 mm, 6.74 ± 1.40 mm, 16.35° ± 0.72°, and 31.48° ± 3.38° in group II, respectively. Measurements in group I were significantly lower than group II ( P < .005). Conclusion Digital hydroforming for plate prebent is a reliable method that helps improving the clinical accuracy of CAD/CAM‐guided mandibular reconstruction surgery.