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Acta stomatologica Croatica : International journal of oral sciences and dental medicine, Vol. 51 No. 3, 2017.

Original scientific paper

https://doi.org/10.15644/asc51/3/1

Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings

Syed Rashid Habib ; College of Dentistry, King Saud University, Saudi Arabia
Mohammed Ginan Al Ajmi ; College of Dentistry, King Saud University, Saudi Arabia
Mohammed Al Dhafyan ; College of Dentistry, King Saud University, Saudi Arabia
Abdulrehman Jomah ; College of Dentistry, King Saud University, Saudi Arabia
Haytham Abualsaud ; College of Dentistry, King Saud University, Saudi Arabia
Mazen Almashali ; Security Forces Hospital, Riyadh, Saudi Arabia

Full text: croatian pdf 411 Kb

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Full text: english pdf 411 Kb

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Abstract

Objective: The aim of this in vitro study was to investigate the effect of Shoulder versus Chamfer margin design on the marginal adaptation of zirconia (Zr) copings. Materials and Methods: 40 extracted molar teeth were mounted in resin and prepared for zirconia crowns with two margin preparation designs (20=Shoulder and 20=Chamfer). The copings were manufactured by Cercon® (DeguDent GmbH, Germany) using the CAD/CAM system for each tooth. They were tried on each tooth, cemented, thermocycled, re-embedded in resin and were subsequently cross sectioned centrally into two equal mesial and distal halves. They were examined under electron microscope at 200 X magnification and the measurements were recorded at 5 predetermined points in micrometers (µm). Results: The overall mean marginal gap for the two groups was found to be 206.98+42.78µm with Shoulder margin design (Marginal Gap=199.50+40.72µm) having better adaptation compared to Chamfer (Marginal Gap=214.46+44.85µm). The independent-samples t-test showed a statistically non-significant difference (p=.113) between the means of marginal gap for Shoulder and Chamfer margin designs and the measurements were recorded at 5 predetermined points for the two groups. Conclusions: The Chamfer margin design appeared to offer the same adaptation results as the Shoulder margin design.

Keywords

Dental Crown Margin; Dental Marginal Adaptation; CAD/CAM

Hrčak ID:

186741

URI

https://hrcak.srce.hr/186741

Publication date:

26.9.2017.

Article data in other languages: croatian

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