| Objective:In this study,three-dimensional finite element analysis method was used to compare the stress distribution and distribution of different bonding systems for fiber-reinforced composite resin bonded dentures and resin bonded denture complexes in order to reasonably select the bonding system and bonding for clinical use.The design and application of dentures provide a theoretical basis.Methods:Part I Establishment of three-dimensional finite element model of mandibular anterior teeth fiber-reinforced composite resin adhesive fixed denture and resin bonded fixed dentureThe cone-beam CT scan was used to obtain the CT images of the maxillary and mandibular dentition.The original tooth data obtained from the CBCT scan was imported into Mimics 10.01 software,and the mandibular teeth,periodontal ligament,adhesive layer,prosthesis and fiber reinforced were generated using Geomagic Studio software and CATIA software.The three-dimensional finite element model of the adhesive denture complex was established separately:Experimental model I: Absence of the left mandibular central incisor(31),abutment of the left lower incisor(32)and right lower incisor(41),and fiber-reinforced composite adhesive denture repair of the left lower central incisor(31)Experimental model II: missing of the left mandibular central incisor(31),the left lower incisor(32)and the right lower incisor(41)as the abutment,and the resin-bonded denture repair of the left lower central incisor(31)Part ? Three-dimensional finite element analysis of different denture bonding systems for mandibular anterior teeth with fiber-reinforced composite resinThe ABAQUS/Standard solver was used to analyze the three bonding systems ofSuper-Bond C&B,Panavia Fluoro,and RelyX Ultimate.When vertical and oblique loads were applied to the fiber-reinforced composite resin bonded fixed denture complex(Model I),the fibers To enhance the Von Mises stress and stress distribution pattern of the prosthesis,adhesive layer interface,abutment tooth and periodontal ligament in the composite denture adhesively bonded to the fixed prosthetic composite.Part III Finite Element Analysis of Fiber-reinforced Composite Resin Bonded Fixed Denture and Resin Bonded Fixed Denture with Different LoadsAn ABAQUS/Standard solver was used to analyze the fiber-reinforced composite resin bonded fixed partial dentures(Model 1)and the resin bonded fixed partial dentures(Model 2),and applied perpendicular to Model 1 and Model 2 under the Super-Bond C&B bonding system.When loaded diagonally and obliquely,the fiber-reinforced composite resin bonded to the fixed denture complex(Model 1)and the resin-bonded fixed denture complex(Model II)in the prosthesis,adhesive layer interface,abutment tooth and periodontal ligament Von Mises stress and its stress distribution.Result:Part I Establishment of three-dimensional finite element model of mandibular anterior teeth fiber-reinforced composite resin adhesive fixed denture and resin bonded fixed dentureA three-dimensional finite element model of a fiber-reinforced composite resin-bonded fixed denture complex(Model I)and a resin bonded fixed denture complex(Model II)with relatively complete structure and high geometric similarity was established.There are 66357 units and 17157 nodes of tetrahedral elements.After the second model is built up,a total of 63838 elements and 16256 tetrahedral elements are generated.Part ? Three-dimensional finite element analysis of different denture bonding systems for mandibular anterior teeth with fiber-reinforced composite resin1.Under the same load condition,the three bonding systems had little effect on the Von Mises values of the prosthesis,abutment tooth and periodontal ligament in the fiber-reinforced composite resin bonded denture complex;The Von Mises value of the adhesive layer increases as the Young's modulus of the bonding system increases.In the Super-Bond C&B bonding system,the Von Mises value at the interface of the adhesive layer is the smallest.The trend of Von Mises values of the components of the fiber-reinforced composite resin adhesive-fixed denture composite under the sameadhesive system was that the prosthesis>bonding layer>abutment tooth>periodontal membrane showed a decreasing trend of stress transmission.2.Stress distribution cloud diagrams of different dentures bonded to fiber-reinforced composite resin,The connection area of the restoration is a high stress concentration area,The stress of the adhesive layer is mainly concentrated on the connecting body near the edentulous region.The stress of the abutment teeth is mainly concentrated on the abutment surface,the mesial surface,and near the tongue angle.The stress in the periodontal ligament is mainly concentrated on the near-middle of the periodontal ligament,the lip surface,and the corner of the proximal lip.3.Under the same adhesive system,the vertical load has a greater influence on the stress of the restoration,the adhesive layer and the abutment tooth,and the oblique load has a greater effect on the stress of the periodontal membrane.The stress buffering effect of the periodontal membrane under vertical load is more obvious than that under the oblique load.Part III Finite Element Analysis of Fiber-reinforced Composite Resin Bonded Fixed Denture and Resin Bonded Fixed Denture with Different Loads1.At the same load,under the same adhesive system,the Von Mises values and the stress distribution of the adhesive layer,the abutment tooth,and the periodontal ligament of the fiber-reinforced composite resin-bonded and fixed denture composites were not significantly different.2.The stress concentration of the prosthesis in the fiber-reinforced composite resin-bonded and fixed denture complex was smaller than that of the resin-bonded and fixed prosthesis,and the stress reduction was more obvious under the oblique load.The fiber-reinforced tape can better share the stress in the fiber direction,but the stress distribution perpendicular to the fiber direction is limited.The change in the Von Mises value of the prosthetic component is related to the use of the reinforcing fiber tape.Conclusion:1.Feasibility of three-dimensional finite element model of fiber-reinforced composite resin bonded fixed denture complex(Model I)and resin bonded fixed denture complex(Model II)2.Super-bond C & B super adhesive is more conducive to the dispersion of the interface between the restoration and the abutment stress,is conducive to the long-term stability of the adhesive restorations.That is,selecting a binder with a low elastic modulusfacilitates the stability of the bonding interface.3.The damage to the prosthesis,the adhesive layer and the abutment teeth is greater when loaded vertically,and the periodontal membrane is more destructive when loaded obliquely.4.Adhesive fixed denture design should be selected with everStick C & B fiber-reinforced composite resin adhesive fixed denture design.The connection area is a high-stress concentration area,and the method of increasing the bonding area between the restoration and the abutment connection area should be adopted to reduce the stress in the connection area. |
PDF Full Text Request