Hai-Xin Yan

Publications (2)0 Total impact

• Article: [Rehabilitation by hollow obturator prosthesis immediately after total maxillectomy for malignant tumor].

  Xiao-ye Li, Ai-hui Yan, Shuai Hao, Wei Li, Xue-jun Jiang, Li Lu, Xing-jun Qin, Hai-xin Yan
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  ABSTRACT: The feasibility and clinical effects of hollow obturator prosthesis for the repair of maxillofacial defect immediately after maxillectomy for cancer were assessed. Thirteen patients with T3-4aN0M0 maxillary neoplasm were treated by the prostheses immediately after maxillectomy. According to the 3D-CT reconstruction of nasal sinus, the 3D stereoscopic prototype was constructed before the surgery. Simulating surgery with Surgicare 5.0 software and then the prosthesis 3D stereoscopic model was shaped. The prosthesis was made quickly and precisely with methacrylate resins according to the model and the print mold before surgery, with supplementary tooth at the bottom of prosthesis. In the surgery, the prosthesis was installed instantly after maxillectomy. The patients were followed up at 1, 3 and 6 month after the surgery, respectively. The facial features and the pronunciation clarity were examined and the questionnaires were carried out in the patients, with comparation by paired t-test. The hollow obturator prosthesis would be replaced by permanent prosthesis made of methacrylate resins at 6 month after the surgery. The hollow obturator prostheses were installed accurately and maxillofacial defects were repaired immediately after maxillectomy in the 13 patients. Postoperative follow-up showed there were significant differences in eyeball sagging (t = 4.67, P < 0.05), mid-facial region collapse (t = 5.67, P < 0.05), and pronunciation clarity (t = 16.38, P < 0.05) between patients with and without prostheses. Questionnaires showed that all the patients were satisfied with the retention of prostheses, the improvement of appearance, the improvement of the symptom of water choking and speech definition. Six months after the surgery, the hollow obturator prostheses were replaced smoothly by permanent prostheses in 11 of the 13 patients. The precise and instant repair of maxillofacial defect by prosthesis after maxillectomy can improve survival quality of patient.
  Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery 05/2011; 46(5):362-7.
• Article: [The reconstruction of geometric models of dentition defects based on 3-dimensional industrial computed tomography image].

  Lin Wu, Hai-Xin Yan, Min Yang
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  ABSTRACT: A technique on data capture of plaster models for building 3-dimensional geometric models of dentition defects was presented for the purpose of further computer-aided design and manufacture (CAD/CAM)of removable partial denture. A plaster model with dentition defects was scanned with low energy X-ray industrial computed tomography (ICT) for ICT image. The data after image processing and vectorization were transferred to a customized reverse engineering software system, and a CAD model of dentition defects was reconstructed. Then a 3-dimensional digital model of removable partial denture framework was created with CAD/CAM software system. Import/export of the data was in STL format. Dense and uniform data points without blind areas were acquired and the structure of the reconstructed CAD model of dentition defects was clean and smooth. CAD model of framework was then obtained. The method presented is practical for 3-dimensional data capture, and it helps build reliable 3-dimensional geometric models with better spatial resolution and higher precision than conventional technique with medical CT.
  Shanghai kou qiang yi xue = Shanghai journal of stomatology 11/2006; 15(5):535-8.