PMID: 8601182Dec 1, 1995Paper

Comparison of strains transferred to a bone simulant among implant overdenture bars with various levels of misfit

Journal of Prosthodontics : Official Journal of the American College of Prosthodontists
N L ClellandA Gilat

Abstract

To measure and compare strains transferred to a bone simulant by screw-fastening implant overdenture bars with various levels of fit or misfit. Photoelastic resin was cast directly to two 3.75 X 13-mm Branemark fixtures (Nobelpharma USA Inc, Chicago, IL) situated 20 mm apart in a silicone mold of an edentulous mandible. Two strain-gauge rosettes were also incorporated in the resin to allow precise determination of principal stresses at two locations. Four groups of three overdenture bars with 0-, 180-, 360-, and 500-micrometer vertical gaps were fabricated. These bars were sequentially secured to the abutments with gold slot screws tightened to 10 N-cm. Strain indicator readings were recorded at a standardized time following the initial fastening of each bar. The test was repeated three times for each overdenture bar. Mean principal stresses and strains at the location of the rosettes were determined. The magnitude of these stresses and strains increased significantly with each increase in gap size. Strains were several times larger mesial to the fixture than they were distal. Strains are transferred to the bone when misfitting prostheses were secured. Some of the strains mesial to the fixture appeared to be unfavorable for reg...Continue Reading

References

Aug 1, 1978·The Journal of Prosthetic Dentistry·N TakahashiT Komori
Dec 1, 1992·Bone and Mineral·H M Frost
Jun 1, 1983·The Journal of Prosthetic Dentistry·R Skalak
Mar 1, 1993·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·A B Carr, R B Stewart
Feb 1, 1993·Journal of Oral and Maxillofacial Surgery : Official Journal of the American Association of Oral and Maxillofacial Surgeons·J D RuskinR S Markin

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Citations

Dec 11, 2002·The Journal of Prosthetic Dentistry·Murat C Cehreli, Senay Canay
Apr 12, 2003·The Journal of Prosthetic Dentistry·Donna M Hecker, Steven E Eckert
Jun 22, 2005·Implant Dentistry·Matthias KarlSiegfried M Heckmann
Apr 11, 2009·Implant Dentistry·Rashmi HegdeMichael S McCracken
Jun 11, 2014·The Journal of Oral Implantology·Jaini Jaini LalithammaRita Zarina
May 2, 2014·The Journal of Oral Implantology·Aldiéris Alves PesqueiraEduardo Piza Pellizzer
Oct 12, 2007·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Matthias KarlSiegfried M Heckmann
Nov 4, 2010·Clinical Oral Implants Research·Jaafar AbduoMichael Swain
Oct 15, 2013·The Journal of Oral Implantology·Souheil HussainiSaul Weiner
Nov 19, 2011·Journal of Prosthodontic Research·Jaafar Abduo, Karl Lyons
Sep 1, 1996·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·N L ClellandA Gilat
Mar 31, 2000·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·P J ZervasA B Carr
Aug 18, 2009·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Jose PaivaMichael S McCracken
Jul 31, 2013·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Angel AlvarezJoseba J Ellacuria

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