A Comparison of Zirconia and Titanium Abutments for Microleakage

Clinical Implant Dentistry and Related Research
Mohamed I AbdelhamedBinnaz Leblebicioglu

Abstract

Microleakage through the interface has been documented in implant systems with titanium (Ti) abutments. There is a current increase in the use of zirconia (Zi) abutments especially in esthetic zone in where higher risk of visible metal color through the peri-implant tissues exists. The aim of the present in vitro study is to evaluate the leakage at the implant fixture-abutment interface with two different screw-retained abutment systems at different torque values in a nonloading condition. In vitro study design included four groups (Ti and Zi torqued at 25 and 15 Ncm [N = 8/group]). Microcomputed tomography (micro-CT) was chosen to detect microgap. Microleakage from the implant chamber to the external milieu was evaluated using limulus amebocyte lysate (LAL) test, while microleakage from external milieu to the implant chamber was evaluated using toluidine blue dye (TBD) and colorimeter. Micro-CT images did not reveal any microgap. LAL test showed that there is a time-, abutment-, and torque-dependent increase in microleakage (p = .001) with Zi torqued at 15 Ncm having higher leakage with time compared with Ti torqued at 15 Ncm (p = .002), as well as Zi torqued at 15 Ncm having higher leakage with time compared with Zi torqued a...Continue Reading

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Citations

Jul 10, 2019·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Yubin CaoChunjie Li
May 14, 2019·The Journal of Advanced Prosthodontics·Nazmiye ŞenNezahat Gürler
Feb 24, 2021·International Journal of Oral and Maxillofacial Surgery·K KnihaS C Möhlhenrich

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