Effect of Diamond-like Carbon Coating Applied by the Physical Vapor Deposition Technique on Wear of Diamond and Tungsten Carbide Dental Burs
Publish place: Avicenna Journal of Dental Research، Vol: 15، Issue: 2
Publish Year: 1402
نوع سند: مقاله ژورنالی
زبان: English
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JR_AJDR-15-2_005
تاریخ نمایه سازی: 14 آذر 1402
Abstract:
Background: The methods of increasing the longevity of dental burs by improving the mechanical
properties of these surfaces, can increase their longevity. This study assessed the effect of diamond-like
carbon (DLC) coating applied by the physical vapor deposition (PVD) technique on wear of diamond and
tungsten carbide (TC) burs.
Methods: In this in vitro study, ۳۰ diamond and ۳۰ TC burs were evaluated in four groups, including
TC burs without coating (control), TC burs with a ۳.۵-μm DLC coating applied by the PVD technique,
diamond burs without coating (control), and diamond burs with a ۳.۵-μm DLC coating applied by the
PVD technique. The burs were weighed by a digital scale, underwent the pin-on-disc wear test, and were
weighed again. The weight loss indicated the degree of wear in each group. For qualitative assessments,
the surface of the burs was inspected under a stereomicroscope at × ۴ and × ۱۰ magnifications before wear,
halfway through the test, and after the test. Finally, the data were analyzed by two-way ANOVA (α = ۰.۰۵).
Results: The effect of DLC coating was significant on the wear of burs (P = ۰.۰۳۲), but the effect of the type
of bur and their interaction effect on wear were not significant (P = ۰.۱۵۱). A significant difference existed
in wear among the four groups (P < ۰.۰۰۱), and the wear of coated burs was significantly lower than that
of non-coated burs (P = ۰.۰۱۲). Stereomicroscopic assessments revealed some residual diamond particles,
the impression of dislodged particles and the path of wear on the surface of diamond burs, and the path
of wear on the surface of TC burs.
Conclusions: Overall, the DLC coating of diamond and TC dental burs by the PVD technique could
increase their wear resistance irrespective of the bur type.
Keywords:
Authors
Bahareh Asgartooran
Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
Zahra Khamverdi
Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
Faezeh Soury
Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
Shiva Kavousinejad
Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran