Effect of Occlusal Venting Diameter of Implant-supported Crown on Cement Flow - A Computational Fluid Dynamics Analysis.

doi:10.13701/j.cnki.kqyxyj.2018.12.019

Abstract

Abstract: Objective: To analyze the cement flow patterns inside implant-supported crowns with different occlusal venting diameters by using computational fluid dynamics (CFD) approach in order to provide a reference to the venting of cement-retained crown.Methods: By using ICEM 17.0 software, four CFD models were created, including no hole (NH) crown, and the crowns with occlusal hole (OH) ranging from 1mm to 3 mm in diameter (OH1-OH3).Real-time model simulations of cement and air displacement were produced by using volume of fluid (VOF) model which was available in Fluent 17.0 software.Results: In NH group, the cement filled incompletely and overflowed obviously, but in OH groups, the die space between crown and abutment was full-filled by cement, and the extrusion was reduced greatly.There were no apparent differences for the cement flow patterns among OH1-OH3 subgroups.Conclusion: The occlusal hole on the crown can improve the flow pattern of cement to achieve ideal internal filling and reduce external extrusion, but the cement flow cannot be further optimized by increasing the venting diameter.Thus, an occlusal hole with 1 mm in diameter should be considered in order to maintain structural integrity.

Key words: Implant restoration, Occlusal surface hole, Cement, Computational fluid dynamics

LI Zhe, QIN Bo-wen, CHANG Xiao-feng, MENG Zhao-li, PAN Feng, WANG Miao, DU Liang-zhi. Effect of Occlusal Venting Diameter of Implant-supported Crown on Cement Flow - A Computational Fluid Dynamics Analysis.[J]. Journal of Oral Science Research, 2018, 34(12): 1342-1346.

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