Improved accuracy of hemimandibular reconstructions involving the condyle by utilizing hydroformed reconstruction plates rather than hand‐bent stock plates
Hui Shan Ong BDS, MD, PhD Jian Nan Liu DDS, MD, PhD Abdelrehem Ahmed DDS, MD, PhD Xing Zhou Qu DDS, MD, PhD Kenneth Wan DDS, MD, MClinOMFS Dong Ping Xie MS … See all authors
First published: 28 May 2019 https://doi.org/10.1002/hed.25809
All authors have read and approved the manuscript. All authors abide by the ethical protocol and certified fidelity of this article.
Funding information: National Natural Science Foundation of China, Grant/Award Numbers: 81702673, 31650003; Science and Technology Commission of Shanghai Municipality, Grant/Award Number: 20184Y0017
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Abstract
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.
Hui Shan Ong BDS, MD, PhD Jian Nan Liu DDS, MD, PhD Abdelrehem Ahmed DDS, MD, PhD Xing Zhou Qu DDS, MD, PhD Kenneth Wan DDS, MD, MClinOMFS Dong Ping Xie MS … See all authors
First published: 28 May 2019 https://doi.org/10.1002/hed.25809
All authors have read and approved the manuscript. All authors abide by the ethical protocol and certified fidelity of this article.
Funding information: National Natural Science Foundation of China, Grant/Award Numbers: 81702673, 31650003; Science and Technology Commission of Shanghai Municipality, Grant/Award Number: 20184Y0017
Read the full text
ePDFPDFTOOLS SHARE
Abstract
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.
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