title: Influence of custom-made implant designs on the biomechanical performance for the case of immediate post-extraction placement in the maxillary esthetic zone: a finite element analysis.
abstract: Due to the increasing adoption of immediate implantation strategies and the rapid development of the computer aided design/computer aided manufacturing technology, a therapeutic concept based on patient-specific implant dentistry has recently been reintroduced by many researchers. However, little information is available on the designs of custom-made dental implant systems, especially their biomechanical behavior. The influence of the custom-made implant designs on the biomechanical performance for both an immediate and a delayed loading protocol in the maxillary esthetic zone was evaluated by means of the finite element (FE) method. FE models of three dental implants were considered: a state of the art cylindrical implant and two custom-made implants designed by reverse engineering technology, namely a root-analogue implant and a root-analogue threaded implant. The von Mises stress distributions and micro-motions around the bone-implant interfaces were calculated using ANSYS software. In a comparison of the three implant designs for both loading protocols, a favorable biomechanical performance was observed for the use of root-analogue threaded implant which approximated the geometry of natural anterior tooth and maintained the original long-axis. The results indicated that bone-implant interfacial micro-motion was reduced and a favorable stress distribution after osseointegration was achieved.
authors.affiliation: a Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology , Sun Yat-sen University , Guangzhou , China.
authors.forename: Jianyu
authors.initials: J
authors.lastname: Chen
authors.affiliation: a Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Hospital of Stomatology , Sun Yat-sen University , Guangzhou , China.
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: b Guangzhou Institute of Advanced Technology , Chinese Academy of Science , Guangzhou , China.
authors.forename: Xianshuai
authors.initials: X
authors.lastname: Chen
authors.affiliation: b Guangzhou Institute of Advanced Technology , Chinese Academy of Science , Guangzhou , China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhang
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D015921:Dental Implants; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis; D004954:Esthetics; D020342:Finite Element Analysis; D006801:Humans; D008437:Maxilla / Q000601:surgery*; D014081:Tooth Extraction
chemical_list: D015921:Dental Implants
keywords: Custom-made implant; finite element analysis; root-analogue implant