The effect of load cycling on metal ceramic screw-retained implant restorations with unrestored and restored screw access holes

The Journal of Prosthetic Dentistry
M KarlS M Heckmann

Abstract

It has been shown that under cyclic loading, more chipping fractures of the veneer ceramic occur on the occlusal surface of screw-retained implant-supported fixed partial dentures (FPDs) with unrestored screw access holes (SAHs) than in cemented restorations. This lack of stability may result in esthetic and functional problems. The purpose of this study was to investigate whether, under dynamic loading, fewer chipping fractures occur on the occlusal surface of screw-retained ceramic veneered implant FPDs with restored SAHs than in those with unrestored SAHs. Twenty screw-retained ceramic veneered 5-unit FPDs were manufactured for a 3-implant situation and divided into 2 groups of 10 unrestored and 10 SAHs restored with adhesive composite resin restorations (Tetric Evo Ceram). A masticatory simulator was used to load the FPDs occlusal to the implant positions for 20,000 cycles with a force of 100 N applied for 1 second, followed by 1 second of no loading. Three prosthodontists evaluated the FPDs using a light microscope and a dental probe. The number of chipping fractures found were analyzed using a generalized linear model with Poisson response and log link function (alpha =.05). Investigators found significantly more chipping...Continue Reading

References

May 1, 1996·The Journal of Prosthetic Dentistry·E Cavazos, F A Bell
Oct 18, 2001·Critical Reviews in Oral Biology and Medicine : an Official Publication of the American Association of Oral Biologists·G BaranJ McCool
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Mar 31, 2005·The Journal of Prosthetic Dentistry·Matthias KarlSiegfried M Heckmann
Mar 31, 2007·The Journal of Prosthetic Dentistry·Matthias KarlSiegfried M Heckmann

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Citations

Mar 11, 2015·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Lorenna Bastos Lima Verde NogueiraGregorio Antonio Soares Martins
Jan 3, 2014·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Sami SherifRobert F Wright
Sep 17, 2014·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Remy Tanimura, Shiro Suzuki
Mar 17, 2017·Brazilian Dental Journal·Cibele Oliveira de Melo RochaJoão Neudenir Arioli
Apr 9, 2016·Brazilian Dental Journal·Rodrigo de Paula PereiraJoão Neudenir Arioli-Filho

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