Algoritmus remodelace kostní tkáně okolo dentálních implantátů

An Algorithm for Computational Simulation of Mandible Bone Modeling and Remodeling Around Dental Implants

conference paper

en

Clinically, dental implants induce diverse stresses on surrounding bone; however, when excessive forces are applied implant failure can occur. The stress and strain fields around dental implants are affected by the bone quality and quantity and the remodeling processes at the bone-implant interface. Computational simulation of the bone remodeling around dental implants still remains a challenge. In this study, a microCT-based 2-D geometry of mandibular segment is used to simulate the remodeling of bone in response to contact with a screw implant. The remodeling process is simulated using an adaptive feedback algorithm which is based on "Mechanostat" strain thresholds, i.e. the initial trabecular architecture changes depending on the loading and boundary conditions and results in the final distribution of the trabeculae within the cancellous bone. The aim of this study is to introduce a novel computational FE model for the simulation of trabecular bone remodeling around dental implants. Computational simulation of the bone remodelling process is strongly dependent on the boundary conditions and thus performing 3-D simulations with more sophisticated boundary conditions is necessary.

V práci byl vytvořen pomocí MKP výpočtový algoritmus modelace a remodelace kostní tkáně. Jedná se o pilotní studii a bylo prokázáno, že je třeba vytvářet výpočtové modely na vysoké úrovni z mikro-CT snímků.

Clinically, dental implants induce diverse stresses on surrounding bone; however, when excessive forces are applied implant failure can occur. The stress and strain fields around dental implants are affected by the bone quality and quantity and the remodeling processes at the bone-implant interface. Computational simulation of the bone remodeling around dental implants still remains a challenge. In this study, a microCT-based 2-D geometry of mandibular segment is used to simulate the remodeling of bone in response to contact with a screw implant. The remodeling process is simulated using an adaptive feedback algorithm which is based on "Mechanostat" strain thresholds, i.e. the initial trabecular architecture changes depending on the loading and boundary conditions and results in the final distribution of the trabeculae within the cancellous bone. The aim of this study is to introduce a novel computational FE model for the simulation of trabecular bone remodeling around dental implants. Computational simulation of the bone remodelling process is strongly dependent on the boundary conditions and thus performing 3-D simulations with more sophisticated boundary conditions is necessary.

Dolní čelist; kost; zubní implantát, MKP

Mandible; Bone; Dental implant; Mechanostat theory; FEM

2014

12.05.2014

BUT

Svratka

978-80-214-4871-1

Engineering Mechanics 2014

2014

388–391

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