title: The effects of implant angulation on the resonance frequency of a dental implant.
abstract: Dental implants are ideally placed in an orientation that allows vertical transfer of occlusal forces along their long axis. Nevertheless, optimal situations for implant placement are seldom encountered resulting in implants placement in angulated positions, which may affect their long-term success. The resonance frequency (RF) is an objective tool used to monitor stability of the implant tissue integration; however, little is known of the effect of the implant orientation in bone on the RF and its potential significance. The purpose of this research was to determine the relation between the dental implant orientation and the corresponding RF of implant. Three-dimensional (3D) modelling software was used to construct a 3D model of a pig mandible from computed tomography (CT) images. The RF of the implant was analysed using finite element (FE) modal analysis in software ANSYS (v.12). In addition, a cubical model was also developed in MIMICS to investigate the parameters affecting the relationship between RF and implant orientation in a simplified environment. The orientation angle was increased from 0 to 10 degrees in 1 degree increments and the resulting RF was analysed using correlation analysis and one-way ANOVA. Our analysis illustrated that the RF fluctuation following altering implant orientation was strongly correlated (r=0.97) with the contacting cortical to cancellous bone ratio (CCBR) at the implant interface. The most extreme RF change (from 9.81kHz to 10.07kHz) occurred when the implant was moved 0.5mm in positive z-direction, which resulted in the maximum change of CCBR from 52.9 to 54.8.
authors: Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102nd Avenue, Surrey, BC, Canada V3T 0A3.
authors: R
authors: R
authors: Harirforoush
authors: Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102nd Avenue, Surrey, BC, Canada V3T 0A3. Electronic address: arzanpour@sfu.ca.
authors: S
authors: S
authors: Arzanpour
authors: Department of Oral Health sciences, University of British Columbia, 2199 Westbrook Mall, Vancouver, BC, Canada V6T 1Z3.
authors: B
authors: B
authors: Chehroudi
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D015519:Bone Density; D003198:Computer Simulation; D019250:Dental Implants, Single-Tooth; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D055119:Elastic Modulus; D004852:Epoxy Compounds; D020342:Finite Element Analysis; D021621:Imaging, Three-Dimensional; D008334:Mandible / Q000000981:diagnostic imaging / Q000502:physiology; D008954:Models, Biological; D016348:Osseointegration; D012984:Software; D013552:Swine; D014057:Tomography, X-Ray Computed; D014732:Vibration
chemical_list: D004852:Epoxy Compounds