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Implantatdesign und Kraftübertragung auf den Knochen: eine photoelastische Analyse und Untersuchung mit Dehnmessstreifen
Author(s) -
Cehreli Murat,
Duyck Joke,
Cooman Michel De,
Puers Robert,
Naert Ignace
Publication year - 2004
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2004.00979.x
Subject(s) - photoelasticity , abutment , strain gauge , materials science , implant , dental abutments , strain (injury) , stress (linguistics) , conical surface , orthodontics , dentistry , composite material , structural engineering , medicine , engineering , surgery , anatomy , linguistics , philosophy , solid mechanics
Objectives: To compare stress and strain magnitudes of butt‐joint and internal‐cone oral implants in a bone simulant. Material and methods: Photoelastic and strain‐gauged models of solitary Brånemark ® , ITI ® and Astra Tech ® implants were obtained. Vertical and 20° oblique forces of 100 and 150 N were applied on the abutments in separate load cases. Isochromatic fringe patterns around implants were observed and photographed in the field of a polariscope. Strain‐gauge measurements were performed and principal strains induced around implants were calculated. Results: Isochromatic fringe orders of all designs were similar under both loading conditions ( P >0.05). Strains around Brånemark ® implants were lower than around Astra Tech ® and ITI ® implants, particularly under vertical loads. The latter implants had similar strain magnitudes ( P >0.05), although strains around the conical Astra Tech ® implant were lower under vertical load. Conclusions: Butt‐joint and internal‐cone oral implants have similar force distribution characteristics. The implant–abutment mating design is not a decisive factor affecting stress and strain magnitudes in a bone simulant.