title: Three dimensional finite element analysis of a novel osteointegrated dental implant designed to reduce stress peak of cortical bone.
abstract: A new type of dental implant was designed as multi-component mainly including inset and abutment between which a gap was introduced to guide the force to transmit from the cancellous bone to cortical bone, with the intention to lower the stress peak at cortical bone. By way of finite element analysis (FEA) associated with advanced computer tomography (CT) and 3D model reconstruction technology to construct precise mandible model, biomechanical aspects of implant were investigated. Compared with traditional implant that created stress dominantly at cortical bone, stress peak at the implant/bone interface in the cervical cortex decreased sharply (about 51%) for the new type of implant. Furthermore, applying varying implant shape and gap dimensions helped to optimize the design of this new implant. Optimization results revealed that: (1) screwed cylindrical implant is superior to tapered, stepped and smooth cylindrical implant in effectively decreasing the stress peak of bone; (2) deepening and widening gap would contribute to the decline of stress peak, but at the cost of break and destruction of the inset; (3) suitable gap size with the depth of 7 mm and width of 0.3 mm would be applicable. This work may provide reference for clinical application of dental implant.
authors.affiliation: The Medical and Scientific Research Center of Guangxi Medical University, Guangxi Medical University, Nanning, Guangxi, China. Research Center of Regenerative Medicine of Guangxi Medical University, Nanning, Guangxi, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zheng
authors.affiliation: Research Center of Regenerative Medicine of Guangxi Medical University, Nanning, Guangxi, China.
authors.forename: Jingsong
authors.initials: J
authors.lastname: Yang
authors.affiliation: Research Center of Regenerative Medicine of Guangxi Medical University, Nanning, Guangxi, China.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Hu
authors.affiliation: National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan, China.
authors.forename: Jiaoming
authors.initials: J
authors.lastname: Luo
mesh_terms: D001732:Bite Force; D019245:Compressive Strength / Q000502:physiology; D003198:Computer Simulation; D000044:Dental Abutments; D015921:Dental Implants; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000379:methods*; D019544:Equipment Failure Analysis; D005260:Female; D020342:Finite Element Analysis; D006801:Humans; D008334:Mandible / Q000502:physiology* / Q000601:surgery; D008954:Models, Biological; D016348:Osseointegration / Q000502:physiology*; D013314:Stress, Mechanical; D055815:Young Adult
chemical_list: D015921:Dental Implants