Influence of Transmucosal Height on Loss of Prosthetic Abutment Torque After Mechanical Cycling

The Journal of Oral Implantology
Karla Regina Nogueira da SilvaElizabeth Ferreira Martinez

Abstract

The aim of this study was to measure and record the universal transmucosal abutment height, and then evaluate whether it influenced loosening of the abutment screw by analyzing the torque and detorque values after mechanical cycling. Thirty-six implants, model CM Unitite, with internal conical connections (3.5 × 10 mm) and respective universal prosthetic abutments (n = 36, 3.25 × 6 mm), were divided into three groups (n = 12 each) with respective transmucosal heights of 0.8, 3.5, and 5.5 mm. Insertion torque of 20 Ncm was used in accordance with the manufacturer's specifications. Afterward, the samples were submitted to fatigue tests consisting of 500,000 cycles at a frequency of 2Hz, a dynamic compressive load of 120N, and an angle of 30°. The detorque values were measured with a digital torque meter and tabulated to perform statistical analyses; a level of significance of 5% was adopted. The mean detorque values (SD) obtained were 22.83 (6.30), 22.5 (5.45), and 19.41 (4.69) Ncm for transmucosal abutments with heights of 0.8, 3.5, and 5.5 mm, respectively, and showed no statistically significant difference ( P = .262). The authors of this study concluded that the transmucosal height of prosthetic abutments submitted to mechani...Continue Reading

References

Dec 1, 1981·International Journal of Oral Surgery·R AdellP I Brånemark
Feb 13, 2001·Clinical Oral Implants Research·M S Schwarz
Jul 30, 2003·The Journal of Prosthetic Dentistry·Charles J GoodacreJoseph Y K Kan
Oct 3, 2003·Journal of Biomechanics·Dinçer Bozkaya, Sinan Müftü
Nov 19, 2003·The Journal of Oral Implantology·Sheldon WinklerKenneth G Boberick
Apr 30, 2004·The Journal of Prosthetic Dentistry·Ibrahim AlkanBülent Ekici
Dec 2, 2008·Clinical Oral Implants Research·Lars SteinebrunnerMatthias Kern
Aug 4, 2015·The Journal of Oral Implantology·Hakimeh SiadatMarzieh Alikhasi
Feb 21, 2016·Clinical Oral Investigations·Deceles Cristina Costa AlvesElizabeth Ferreira Martinez
Jun 1, 2016·International Journal of Biomaterials·Hooman KhorshidiMohammad Hassan Kalantari

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Citations

Nov 18, 2020·The Journal of Prosthetic Dentistry·Decio HeinElizabeth F Martinez
Apr 12, 2021·The Journal of Prosthetic Dentistry·Burak YilmazLisa A Lang

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