Research Output Details
Biomechanical effect of different abutment and crown restoration materials in a single anterior dental implant and surrounding bone: A 3D finite element analysis
Published
43
Abstract
Statement of problem
The longevity of implant-supported prostheses is influenced by factors that include the distribution of stress and strains within the prosthetic components and surrounding bone. However, a consensus regarding the optimal combination of abutment and crown materials for implant-supported restorations is lacking.
Purpose
This in vitro study evaluated, through finite element analysis (FEA), the stress distribution within prosthetic components and at the bone-implant interface resulting from different combinations of esthetic abutment and crown materials.
Material and methods
A 3-dimensional (3D) FEA model of an implant-supported maxillary central incisor was constructed with segmented computed tomography data of an edentulous premaxilla processed in the Mimics and 3-Matic software programs. The implant and components were integrated with 5 materials of varying elastic moduli (E) to create 6 abutment and crown combinations: polyetheretherketone (PEEK) and lithium disilicate, PEEK and composite resin, resin-modified ceramic and lithium disilicate, resin-modified ceramic and resin-modified ceramic, PEEK and resin-modified ceramic, and zirconia and lithium disilicate. A static axial loading of 500 N was applied, principal stresses, and von Mises (mvM) stresses were analyzed at the bone-implant interface, luting agent, and prosthetic components.
Results
All models exhibited similar mvM stress distribution patterns at the bone-implant interface. Abutments with higher E values (zirconia, resin-modified ceramic) generated lower mvM stresses in the crown and luting agent compared with lower E materials (PEEK). The PEEK and composite resin model showed the highest mvM stresses (180.7 MPa in the crown; 1542 MPa in luting agent), while zirconia and lithium disilicate exhibited the lowest (107.5 MPa and 146.6 MPa, respectively).
Conclusions
Abutments with higher elastic moduli demonstrated more favorable stress distribution within the crown and luting agent than those with lower modulus values.
The longevity of implant-supported prostheses is influenced by factors that include the distribution of stress and strains within the prosthetic components and surrounding bone. However, a consensus regarding the optimal combination of abutment and crown materials for implant-supported restorations is lacking.
Purpose
This in vitro study evaluated, through finite element analysis (FEA), the stress distribution within prosthetic components and at the bone-implant interface resulting from different combinations of esthetic abutment and crown materials.
Material and methods
A 3-dimensional (3D) FEA model of an implant-supported maxillary central incisor was constructed with segmented computed tomography data of an edentulous premaxilla processed in the Mimics and 3-Matic software programs. The implant and components were integrated with 5 materials of varying elastic moduli (E) to create 6 abutment and crown combinations: polyetheretherketone (PEEK) and lithium disilicate, PEEK and composite resin, resin-modified ceramic and lithium disilicate, resin-modified ceramic and resin-modified ceramic, PEEK and resin-modified ceramic, and zirconia and lithium disilicate. A static axial loading of 500 N was applied, principal stresses, and von Mises (mvM) stresses were analyzed at the bone-implant interface, luting agent, and prosthetic components.
Results
All models exhibited similar mvM stress distribution patterns at the bone-implant interface. Abutments with higher E values (zirconia, resin-modified ceramic) generated lower mvM stresses in the crown and luting agent compared with lower E materials (PEEK). The PEEK and composite resin model showed the highest mvM stresses (180.7 MPa in the crown; 1542 MPa in luting agent), while zirconia and lithium disilicate exhibited the lowest (107.5 MPa and 146.6 MPa, respectively).
Conclusions
Abutments with higher elastic moduli demonstrated more favorable stress distribution within the crown and luting agent than those with lower modulus values.