Digital assessment of marginal accuracy in ceramic crowns fabricated with different marginal finish line configurations.

Autor: Faruqi S; Department of Prosthodontics, College of Dentistry, Jouf University, Saudi Arabia., Ganji KK; Department of Preventive Dentistry, College of Dentistry, Jouf University, Saudi Arabia.; Department of Periodontics, Sharad Pawar Dental College & Hospital, Datta Meghe Institute of Medical Sciences, Nagpur, Maharashtra, India., Bandela V; Department of Prosthodontics, College of Dentistry, Jouf University, Saudi Arabia., Nagarajappa AK; Department of Oral Maxillofacial Radiology, College of Dentistry, Jouf University, Saudi Arabia., Mohamed RN; Department of Pediatric Dentistry, Faculty of Dentistry, Taif University, Taif, Saudi Arabia., Ahmed MA; College of Dentistry, Jouf University, Saudi Arabia., Farhan M; College of Dentistry, Jouf University, Saudi Arabia., Alwakid WN; College of Dentistry, Jouf University, Saudi Arabia., Al-Hammad KAS; Dental Department, King Abdulaziz Airbase Hospital, Dhahran, Saudi Arabia., Alam MK; Department of Preventive Dentistry, College of Dentistry, Jouf University, Saudi Arabia.
Jazyk: angličtina
Zdroj: Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] [J Esthet Restor Dent] 2022 Jul; Vol. 34 (5), pp. 789-795. Date of Electronic Publication: 2021 Oct 19.
DOI: 10.1111/jerd.12822
Abstrakt: Aim: To digitally evaluate the marginal adaptation of different types of all-ceramic crowns on two different marginal configurations such as Shoulder and Chamfer of the prepared teeth.
Methods: The marginal fit of the crown specimens on the model of the prepared teeth were assessed using the dual scan replica technique. Two plastic teeth were prepared; one having a Shoulder finishing line (A), while the other with a Chamfer finish line (B). Three types of different all-ceramic crowns, layered zirconia, monolithic zirconia, and pressed lithium disilicate, were fabricated for each prepared tooth (A) and (B). Measurements for assessing the marginal discrepancy were done on four designated points on the mesial, distal, buccal, and palatal surface of the superimposed image.
Results: The average marginal gap was the largest in the layered zirconia group, followed by monolithic zirconia, while pressed lithium disilicate crowns showed the least marginal gaps. Crowns with Chamfer finish lines were better fitting (less marginal gap) than the shoulder finish lines across all the groups.
Conclusions: Chamfer finish lines produced better fitting restorations, and heat-pressed lithium disilicate crowns showed better adaptation at the margins than both layered zirconia and monolithic zirconia.
(© 2021 Wiley Periodicals LLC.)
Databáze: MEDLINE
Externí odkaz: