In vitro digital image correlation analysis of the strain transferred by screw-retained fixed partial dentures supported by short and conventional implants

Author(s)

Peixoto, Raniel Fernandes ^[1] ; Honorio Tonin, Bruna Santos ^[2] ; Martinelli, Janisse ^[3] ; Macedo, Ana Paula ^[2] ; Chiarello de Mattos, Maria Gloria ^[2]

Affiliation

^[1] Univ Fed Ceara, Fac Pharm Dent & Nursing, Dept Restorat Dent, Rua Monsenhor Furtado S-N, BR-63430355 Fortaleza, Ceara - Brazil

^[2] Univ Sao Paulo, Ribeirao Preto Sch Dent, Dept Dent Mat & Prosthodont, Ribeirao Preto, SP - Brazil

^[3] Univ Fed Triangulo Mineiro, Sch Dent, Uberaba, MG - Brazil

• Document type: Journal article
• Source: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS; v. 103, MAR 2020.
• Web of Science Citations: 0

Abstract

Purpose: This study used digital image correlation (DIC) to evaluate the strain transferred by splinted and non-splinted screw-retained fixed partial dentures (FPDs) supported by short and conventional implants. Material and methods: Four polyurethane models were fabricated to simulate half of the mandibular arch with acrylic resin replicas of the first premolar. Short (5 mm) and/or conventional (11 mm) implants replaced the second premolar and the first and second molars. Groups were: G1, two conventional (second premolar and first molar) and one short (second molar) implant; G2, one conventional (second premolar) and two short (first and second molar) implants; G3, three short implants; and G4, three conventional implants. Splinted (S) and non-splinted (NS) FPDs were screwed to the implant abutments. Occlusal load and a single point load on the second premolar, both of 250 N, were applied. Strain in the horizontal direction MO was calculated and compared using the DIC software. Results: Splinted crowns presented the highest strain magnitudes of all tested groups (p < 0.05). The strain was concentrated near the short implants and presented a higher magnitude compared to conventional implants, especially in G2S (-560.13 mu S), G3S (-372.97 mu S), and G4S (-356.67 mu S). Conclusions: Splinted crowns presented a higher strain concentration around the implants, particularly near the implant replacing the first molar. A combination of short and conventional implants seems to be a viable alternative for the rehabilitation of the posterior edentulous mandible with reduced bone height. (AU)

• FAPESP's process: 12/09808-8 - Qualitative and quantitative analysis of the tensions generated by metaloplastic fixed crowns, splinted and non-splinted, in the posterior region of the mandible, rehabilitated with regular and short implants, by digital image correlation method.
• Grantee: Raniel Fernandes Peixoto
• Support type: Scholarships in Brazil - Master