A novel non-invasive patient-specific navigation method for orbital reconstructive surgery: a phantom study using patient data
- A novel non-invasive patient-specific navigation method for orbital reconstructive surgery: a phantom study using patient data
- 김영준; 손태근; 이정환; 컨데이 메퀘아; 정우식; 최종우
- Issue Date
- Plastic and reconstructive surgery
- VOL 143, NO 3-612
- Background: The correction of orbital deformities is an ongoing challenge in maxillofacial surgery. Computer-assisted navigation can improve surgical outcomes. However, conventional registration methods for navigation are not appropriate for orbital reconstructive surgery. This study proposes an accurate, noninvasive, patient-specific navigation method and demonstrates its feasibility.
Methods: A noninvasive, patient-specific registration frame based on the external auditory canals and upper front teeth was designed using software developed in-house. A three-dimensional craniofacial model was segmented from patient computed tomographic data for the registration frame. A customized craniofacial phantom was also made using this three-dimensional model, with 20 embedded target points on the orbital model and 21 landmark points on
the reference standard model. The proposed method was compared with two conventional registration methods: the dental splint– based method and the invasive marker frame– based method. Twenty trials were conducted for evaluation. Target registration error and surface registration error were computed to measure accuracy.
Results: The proposed method showed a target registration error of 1.05 ± 0.52 mm, with greater accuracy than conventional methods (dental splint, 2.10 ± 0.63 mm; invasive marker frame, 1.22 ± 0.46 mm). The proposed method yielded the best results for surface registration error, with 0.38 mm of deviation (dental splint, 0.82 mm; invasive marker frame, 0.60 mm).
Conclusion: The proposed noninvasive patient-specific registration method demonstrated superior results for both target registration error and surface registration error compared with other conventional registration methods for computer-assisted navigation in orbital reconstructive surgery.
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