ABSTRACT
Objective To provide references for the clinical treatment of patients with periodontal diseases by modeling and analysis based on four software and obtaining stress distributions of the patient’s teeth, according to CT data and plaster model of the patient’s teeth. Methods The CT data were preliminary processed by using Mimics software to establish three-dimensional (3D) cloud model. The 3D surface model of the teeth was then constructed by using Geomagic software to make parameter modeling and reverse engineering. The 3D surface model was imported into SolidWorks to obtain the 3D entity model by entity conversions. Finally, the 3D entity model was imported to ANSYS for analysis. Results The stress distributions on the upper teeth were obtained, and the location of stress concentration points was determined. The stress concentration points of the teeth were analyzed separately, and the maximum stress was 1 774.8 MPa. The occlusal relationship was adjusted based on stress distributions, and the maximum stress after adjustment was reduced to 1 529 MPa. Conclusions This dental modeling and analysis method can simulate various occlusal relationships and calculate tooth stress distribution after amendment, which provides the theoretical basis for clinical treatment of periodontal diseases.
ABSTRACT
Objective To provide references for the clinical treatment of patients with periodontal diseases by modeling and analysis based on four software and obtaining stress distributions of the patient's teeth,according to CT data and plaster model of the patient's teeth.Methods The CT data were preliminary processed by using Mimics software to establish three-dimensional (3 D) cloud model.The 3 D surface model of the teeth was then constructed by using Geomagic software to make parameter modeling and reverse engineering.The 3D surface model was imported into SolidWorks to obtain the 3D entity model by entity conversions.Finally,the 3D entity model was imported to ANSYS for analysis.Results The stress distributions on the upper teeth were obtained,and the location of stress concentration points was determined.The stress concentration points of the teeth were analyzed separately,and the maximum stress was 1 774.8 MPa.The occlusal relationship was adjusted based on stress distributions,and the maximum stress after adjustment was reduced to 1 529 MPa.Conclusions This dental modeling and analysis method can simulate various occlusal relationships and calculate tooth stress distribution after amendment,which provides the theoretical basis for clinical treatment of periodontal diseases.
ABSTRACT
INTRODUCTION: The restoration of function after surgery with mandibular reconstruction is of utmost importance. Mastication and deglutition are compromised if pre-operative dental occlusion is not reestablished. For this purpose, occlusal splints are fabricated pre-operatively. Various methods of occlusal splint fabrication are at hand. DESIGN: Surgical Instrumentation SETTING: Tertiary Academic Hospital OBJECTIVE: This paper presents a simple, quick and inexpensive way of fabricating an occlusal splint with the use of dental modeling compound. MATERIALS AND METHODS: The dental modeling compound is used pre-operatively to make an occlusal appliance. Occlusal splint fabricated with this method was used in 6 patients who underwent segmental mandibular resection with reconstruction for various pathologies. Post-operatively, patients were assessed in terms of occlusion, type of diet and pain on mastication. RESULTS: Out of the 6 patients, only 5 patients were available for evaluation. One patient suffered a myocardial infarction 3 days post-operation and subsequently died. The five patients had good mandibular-maxillary relation post-surgery. They were able to tolerate regular diet with no pain on mastication. CONCLUSION: In conclusion, we have discussed a simple, quick and cost-effective way of fabricating an occlusal splint for use in mandibular reconstruction. (Author)