Stress Distribution in an Implant-Supported Mandibular Complete Denture Using Different Cantilever Lengths and Occlusal Coating Materials. 2017

Rodrigo Antonio de Medeiros, and Marcelo Coelho Goiato, and Aldiéris Alves Pesqueira, and Aljomar José Vechiato Filho, and Liliane da Rocha Bonatto, and Daniela Micheline Dos Santos
*PhD Student, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, São Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil. †Professor, Department of Dental Materials and Prosthodontics, Aracatuba Dental School, São Paulo State University (UNESP), Aracatuba, Sao Paulo, Brazil. ‡Dentist, Private Practice, Cascavel, Parana, Brazil.

OBJECTIVE The aim of this study was to assess stress distribution in the bone-implant interface of a mandibular implant-supported prosthesis with different cantilever lengths, aesthetic coating materials, and implant abutments. METHODS A photoelastic model of an edentulous mandible, containing 5 external hexagon implants, was constructed. Experimental models were divided into 6 groups: group 1-UCLA component and metal bar; group 2-UCLA component and acrylic resin coating; group 3-UCLA component and porcelain coating; group 4-abutment and metal bar; group 5-abutment and acrylic resin coating; and group 6-abutment and porcelain coating. Forces were applied to the most anterior implant, the most posterior implant, and different cantilever lengths. RESULTS The results showed a higher number of high-stress fringes as the cantilever length increased. Fringes were better distributed in groups with prostheses composed of acrylic resin and in groups that contained an abutment. CONCLUSIONS The stress distribution in the bone-implant interface is improved when the cantilever is eliminated and when abutments in an acrylic resin prosthesis are used.

UI MeSH Term Description Entries
D012117 Resins, Synthetic Polymers of high molecular weight which at some stage are capable of being molded and then harden to form useful components. Dental Resins,Dental Resin,Resin, Dental,Resin, Synthetic,Resins, Dental,Synthetic Resin,Synthetic Resins
D003799 Dental Stress Analysis The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures. Analyses, Dental Stress,Analysis, Dental Stress,Stress Analyses, Dental,Stress Analysis, Dental,Dental Stress Analyses
D003824 Denture, Complete A denture replacing all natural teeth and associated structures in both the maxilla and mandible. Complete Denture,Complete Dentures,Dentures, Complete
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000069343 Bone-Implant Interface Region of interaction between the bone and PROSTHESES AND IMPLANTS which becomes bonded through cellular and extracellular interactions similar to OSSEOINTEGRATION. Bone-Prosthesis Interface,Bone Implant Interface,Bone Prosthesis Interface,Bone-Implant Interfaces,Bone-Prosthesis Interfaces,Interface, Bone-Implant,Interface, Bone-Prosthesis,Interfaces, Bone-Implant,Interfaces, Bone-Prosthesis
D016474 Weight-Bearing The physical state of supporting an applied load. This often refers to the weight-bearing bones or joints that support the body's weight, especially those in the spine, hip, knee, and foot. Load-Bearing,Axial Loading,Loadbearing,Weightbearing,Axial Loadings,Load Bearing,Weight Bearing
D017268 Dental Prosthesis Retention Holding a DENTAL PROSTHESIS in place by its design, or by the use of additional devices or adhesives. Prosthesis Retention, Dental,Retention, Dental Prosthesis
D019094 Dental Prosthesis, Implant-Supported A prosthesis that gains its support, stability, and retention from a substructure that is implanted under the soft tissues of the basal seat of the device and is in contact with bone. (From Boucher's Clinical Dental Terminology, 4th ed) Denture, Implant-Supported,Implant-Supported Dental Prosthesis,Implant-Supported Denture,Prosthesis Dental, Implant-Supported,Dental Prostheses, Implant-Supported,Dental Prosthesis, Implant Supported,Dental, Implant-Supported Prosthesis,Dentals, Implant-Supported Prosthesis,Denture, Implant Supported,Dentures, Implant-Supported,Implant Supported Dental Prosthesis,Implant Supported Denture,Implant-Supported Dental Prostheses,Implant-Supported Dentures,Implant-Supported Prosthesis Dental,Implant-Supported Prosthesis Dentals,Prostheses, Implant-Supported Dental,Prosthesis Dental, Implant Supported,Prosthesis Dentals, Implant-Supported,Prosthesis, Implant-Supported Dental
D066298 In Vitro Techniques Methods to study reactions or processes taking place in an artificial environment outside the living organism. In Vitro Test,In Vitro Testing,In Vitro Tests,In Vitro as Topic,In Vitro,In Vitro Technique,In Vitro Testings,Technique, In Vitro,Techniques, In Vitro,Test, In Vitro,Testing, In Vitro,Testings, In Vitro,Tests, In Vitro,Vitro Testing, In

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