Three Dimensional Finite Element Analysis Of The Stress Of Between Implant Titanium Abutments And All-ceramic Crowns Bonding Interface

Objective:To observe the four kinds of titanium abutment and three kinds of adhesive all-ceramic crowns of the different bonding interface stress distribution. Methods:The local structure of the mandibular first molar implants three-dimensional finite element model to simulate the maximum bite force at the crown teeth occlusal surface horizontal and vertical force loading.Results:The level of loading, zinc phosphate bonding interface stress the most, while the composite resin interface, the smallest force.Vertical loads, the largest zinc phosphate bonding interface stress, while the other three interfaces are very close in value. The level of bonding interface the stress loading is far greater than the vertical load. Level of loading, the stress is concentrated at the neck and the implant abutment junction and the contact area with the crown and neck of the buccal and lingual. Zinc adhesive interface stress concentration range greater than the other three bonding interface.Vertical load, the stress concentration at the lingual side of the neck. Maximum load level is higher than the vertical load strain. Strain of the main factors is the bonding agent, zinc phosphate bonding interface is much higher than the fatigue stress than the other three adhesives, but not at the same time its highest stress fatigue is much smaller. Stress and strain concentration zone distribution area similar changes have also remained the same, their maximum concentration in the central region and the shape changes along the line. The total vertical load above the level of deformation load. The total deformation of zinc phosphate bonding interface than the other three bonding interface, the total deformation of ceramic crowns cast than the other two groups. Levels of total deformation load base stations are concentrated mainly in the top lap, cheek, tongue slightly in the near side, far, the total deformation of the maximum base stations in the top center of the region outside the edge of the buccal and lingual 2.The total vertical load deformation concentrated region in the lingual side abutment area, the maximum base stations in the edge of the top centers. Zinc concentration of total deformation bonding interface region the largest alumina ceramic crowns of the total deformation of the region's largest, cast ceramic crowns minimum total deformation region. Conclusion:The bonding interface stress the size of the main factors is the type of adhesive, rather than the type of crown, crown of different materials, but very little influence on the bonding interface.The main factor is the strain adhesive. The total value of material strain deformation of larger range of smaller, more focused, and vice versa.