TY - JOUR
T1 - A digital image correlation analysis on the influence of crown material in implant-supported prostheses on bone strain distribution
AU - Tiossi, Rodrigo
AU - Lin, Lianshan
AU - Conrad, Heather Joan
AU - Rodrigues, Renata C.S.
AU - Heo, Young Cheul
AU - de Mattos, Maria da Gloria Chiarello
AU - Fok, Alex Sui Lun
AU - Ribeiro, Ricardo Faria
N1 - Funding Information:
This investigation was supported by Research Grant Number 2007/06995-3 from Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and by Research Grant Number 2450/09-7 from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) .
PY - 2012/1
Y1 - 2012/1
N2 - Purpose: A digital image correlation (DIC) method for full-field surface strain measurement was used to analyze the effect of two veneering materials for implant supported crowns on the strain distribution within the surrounding bone. Methods: An epoxy resin model of a bone block was made by housing acrylic resin replicas of a mandibular first premolar and second molar together with threaded implants replacing the second premolar and first molar. Porcelain-veneered (G1 and G3) and resin-veneered (G2 and G4) screw-retained splinted crowns were fabricated and loaded with (G1 and G2) and without (G3 and G4) the presence of the second molar replica. A 2-dimensional DIC measuring system was used to record surface deformation of the bone block model at a frequency of 1.0 Hz during application of a 250-N load. Results: Maximum compressive strains (eXX, %) were found for the following regions: between molars, G1 (-0.21), G2 (-0.18), G3 (-0.26), and G4 (-0.25); between implants, G1 (-0.19), G2 (-0.13), G3 (-0.19), and G4 (-0.14). The magnitude of strains in the simulated bone block with the resin-veneered crowns was lower than that with porcelain-veneered crowns, irrespective of the presence or absence of the second molar. Conclusions: The softer resin veneer helped to spread the load more evenly amongst the supporting teeth and implants, thus reducing the strains in the simulant bone block. Conversely, using the harder porcelain veneer resulted in the load being concentrated within one or two teeth or implants, thus leading to higher strain values in the bone block.
AB - Purpose: A digital image correlation (DIC) method for full-field surface strain measurement was used to analyze the effect of two veneering materials for implant supported crowns on the strain distribution within the surrounding bone. Methods: An epoxy resin model of a bone block was made by housing acrylic resin replicas of a mandibular first premolar and second molar together with threaded implants replacing the second premolar and first molar. Porcelain-veneered (G1 and G3) and resin-veneered (G2 and G4) screw-retained splinted crowns were fabricated and loaded with (G1 and G2) and without (G3 and G4) the presence of the second molar replica. A 2-dimensional DIC measuring system was used to record surface deformation of the bone block model at a frequency of 1.0 Hz during application of a 250-N load. Results: Maximum compressive strains (eXX, %) were found for the following regions: between molars, G1 (-0.21), G2 (-0.18), G3 (-0.26), and G4 (-0.25); between implants, G1 (-0.19), G2 (-0.13), G3 (-0.19), and G4 (-0.14). The magnitude of strains in the simulated bone block with the resin-veneered crowns was lower than that with porcelain-veneered crowns, irrespective of the presence or absence of the second molar. Conclusions: The softer resin veneer helped to spread the load more evenly amongst the supporting teeth and implants, thus reducing the strains in the simulant bone block. Conversely, using the harder porcelain veneer resulted in the load being concentrated within one or two teeth or implants, thus leading to higher strain values in the bone block.
KW - Dental implants
KW - Dental materials
KW - Fixed partial denture
KW - Image correlation
KW - Load transfer
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U2 - 10.1016/j.jpor.2011.05.003
DO - 10.1016/j.jpor.2011.05.003
M3 - Article
C2 - 21684233
AN - SCOPUS:84856727262
SN - 1883-1958
VL - 56
SP - 25
EP - 31
JO - Journal of Prosthodontic Research
JF - Journal of Prosthodontic Research
IS - 1
ER -