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Gloss and Surface Roughness of Anterior Pediatric Zirconia Crowns

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Purpose: The purpose of this study was to determine gloss and surface roughness (Ra) of pediatric anterior zirconia crowns.

Methods: Gloss of labial and lingual surfaces of pediatric anterior zirconia crowns from three manufacturers was measured on 20 specimens using a small area gloss meter on each. Ra (μm) was measured using a contact-type surface profilometer. Data were evaluated by analysis of variance and pair-wise comparison at the 0.05 level of significance.

Results: There were statistically significant interactions between surface location and crown type for both gloss and Ra scores. NuSmile had higher mean gloss scores and lower mean Ra scores than both Kinder Krowns and EZCrowns. Kinder Krowns showed lower mean gloss scores and higher Ra scores than other crown groups.

Conclusion: Among all crowns, there was a trend of higher mean gloss paired with lower mean surface roughness, and lower mean gloss paired with higher mean Ra. Hand smoothed followed by mechanically polished zirconia crowns (NuSmile) displayed the highest mean gloss and lowest mean Ra compared to hybrid polishedglazed zirconia crowns (Kinder Krowns, EZCrowns). Of the hybrid polished-glazed zirconia crowns, Kinder Krowns displayed the lowest mean gloss and highest mean Ra.
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Keywords: BACTERIAL ADHESION; GLOSS; PEDIATRIC DENTISTRY; SURFACE ROUGHNESSS; ZIRCONIA CROWNS

Document Type: Research Article

Affiliations: 1: Second year resident, at the University of Texas Health Science Center School of Dentistry at Houston, Houston, Texas, USA;, Email: [email protected] 2: Chair, Department of General Practice and Dental Public Health, at the University of Texas Health Science Center School of Dentistry at Houston, Houston, Texas, USA 3: Chair, Department of Pediatric Dentistry, at the University of Texas Health Science Center School of Dentistry at Houston, Houston, Texas, USA 4: Chair, Department of Esthetic Dentistry and Oral Biomaterials, Houston Center for Biomaterials and Biomimetics, and professor, Department of Restorative Dentistry and Prosthodontics, at the University of Texas Health Science Center School of Dentistry at Houston, Houston, Texas, USA

Publication date: 01 September 2017

More about this publication?
  • Acquired after the merger between the American Society of Dentistry for Children and the American Academy of Pediatric Dentistry in 2002, the Journal of Dentistry for Children (JDC) is an internationally renowned journal whose publishing dates back to 1934. Published three times a year, JDC promotes the practice, education and research specifically related to the specialty of pediatric dentistry. It covers a wide range of topics related to the clinical care of children, from clinical techniques of daily importance to the practitioner, to studies on child behavior and growth and development. JDC also provides information on the physical, psychological and emotional conditions of children as they relate to and affect their dental health.
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