Photoelastic analysis of stresses transmitted by universal cast to long abutment on implant-supported single restorations under static occlusal loads
| Autor: | Maria da Glória Chiarello de Mattos, Ana Paula Macedo, Renata Cristina Silveira Rodrigues, Rodrigo Tiossi, Fábio Afrânio de Aguiar, Ricardo Faria Ribeiro |
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| Rok vydání: | 2012 |
| Předmět: |
Molar
Dental Stress Analysis Surface Properties medicine.medical_treatment Metal Ceramic Alloys Mandible Prosthesis Mandibular first molar Bite Force Stress (mechanics) Mandibular second molar Dental Prosthesis Retention Dental Implants Single-Tooth stomatognathic system Apatites Premolar Medicine Humans Bicuspid Cementation Orthodontics Crowns business.industry Dental Implant-Abutment Design General Medicine Dental Porcelain Models Dental Biomechanical Phenomena Dental Veneers medicine.anatomical_structure Otorhinolaryngology Dental Prosthesis Design Surgery Implant Chromium Alloys Dental Prosthesis Implant-Supported Stress Mechanical business Abutment (dentistry) |
| Zdroj: | The Journal of craniofacial surgery. 23(7 Suppl 1) |
| ISSN: | 1536-3732 |
| Popis: | OBJECTIVES The aim of this study was to compare the stresses resulting from cemented or screw-retained dental prostheses using universal cast to long abutment by the photoelastic method. MATERIAL AND METHODS A photoelastic resin model was fabricated to simulate a segment of the mandibular arch with resin replicas of a first premolar and a second molar, and two 3.75 × 11-mm implants replacing the second premolar and the first molar. Vertical static loads were individually applied on the occlusal surface of the premolar and the molar (5 kgf) and simultaneously on both crowns (10 kgf). RESULTS Results found variable stress patterns around each implant and concentrated stresses in the individually loaded crowns. Force transfer characteristics of each situation and quantification of the isochromatic fringes were evaluated. CONCLUSIONS Within the limitations of this study and based on the results obtained for implant-supported prosthesis with internal hexagon connection/universal cast to long abutment, it could be concluded that single adjacent screw-retained prosthetic restorations lead to higher stresses around the implants when compared with cement-retained restorations. |
| Databáze: | OpenAIRE |
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