Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (34): 5027-5032.doi: 10.3969/j.issn.2095-4344.2016.34.002

Previous Articles     Next Articles

Three-dimensional finite element analysis of dental implant combined with residual tooth after hemisection to support a mandibular molar

Chen Jun-liang1, 2, He Yun1, 2, Huang Yue2   

  1. 1Department of Oral and Maxillofacial Surgery, the Hospital of Stomatology, Southwest University, Luzhou 646000, Sichuan Province, China; 2Orofacial Reconstruction and Regeneration Laboratory, Southwest University, Luzhou 646000, Sichuan Province, China
  • Received:2016-07-20 Online:2016-08-19 Published:2016-08-19
  • Contact: He Yun, Master, Associate professor, Department of Oral and Maxillofacial Surgery, the Hospital of Stomatology Southwest University, Luzhou 646000, Sichuan Province, China; Orofacial Reconstruction and Regeneration Laboratory, Southwest University, Luzhou 646000, Sichuan Province, China
  • About author:Chen Jun-liang, Master, Attending physician, Department of Oral and Maxillofacial Surgery, the Hospital of Stomatology, Southwest University, Luzhou 646000, Sichuan Province, China; Orofacial Reconstruction and Regeneration Laboratory, Southwest University, Luzhou 646000, Sichuan Province, China
  • Supported by:

     the National Natural Science Foundation of China, No. 81300903; a grant from the Health and Family Planning Commission of Sichuan Province, No. 130378; Office of Science & Technology and Intellectual Property of Luzhou, No. 2011-I-S44

PDF

320

Abstract:

BACKGROUND: Tooth hemisection contributes to preserving partial tooth structure and periodontal ligament that are able to reduce the resorption of alveolar bone. However, the traditional fixed partial denture (FPD) for dental restoration after hemisection jeopardizes the health of abutment tooth. Given this, the use of dental implant offers a new option for tooth restoration.
OBJECTIVE: To analyze the feasibility of preserving a mandibular molar after hemisection by combining an inserted dental implant with the residual tooth by means of finite element analysis.
METHODS: Based on the image data of a volunteer, three models with different ways of restorations were created: the model of combining implant and residual tooth after hemisection to support a molar crown (combined model), the model of implant to support a molar crown (implant model) and the model of FPD. Densities of two kinds of spongy bones were assigned respectively. Vertical load of 100 N was applied on the prosthesis. Biomechanical properties of different models were analyzed.
RESULTS AND CONCLUSION: (1) Displacement of the tooth and implant: As the decrease of the density of spongy bone, displacements of the tooth and implant increased in the combined model. The implant displacement was higher in the combined model as compared with the implant model. For the combined model, the implant displacement was lower than that of the residual tooth. (2) Stress in the cortical bone: Stress in the cortical bone in models with low-density spongy bone was higher than that in the corresponding models with high-density spongy bone. Under the condition of high-density spongy bone, the highest values were obtained in the implant model, followed by the combined model and FPD model. Under the condition of low-density spongy bone, the highest values were obtained in the combined model, followed by the implant model and FPD model. (3) Strain in the spongy bone: Strain in the spongy bone in models with low-density spongy bone was higher than that in the corresponding models with high-density spongy bone. Under the condition of high-density spongy bone, the highest values were obtained in the FPD model, followed by the combined model and implant model. Under the condition of low-density spongy bone, the highest values were obtained in the combined model, followed by the FPD model and implant model. From the biomechanical point of view, it can be concluded that the combined use of an implant and residual molar after tooth hemisection is an acceptable treatment option under the condition of high-density spongy bone.

Key words: Dental Implants, Dental Stress Analysis, Finite Element Analysis, Tissue Engineering

CLC Number: