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

2021 ◽  
Author(s):  
Saif Faruqi ◽  
Kiran Kumar Ganji ◽  
Vinod Bandela ◽  
Anil Kumar Nagarajappa ◽  
Roshan Noor Mohamed ◽  
...  
Keyword(s):  
Finish Line ◽  
Digital Assessment ◽  
Ceramic Crowns

Fit of metal ceramic crowns cast in Au-1.6wt% Ti alloy for different abutment finish line curvature

2006 ◽  
Vol 22 (5) ◽  
pp. 397-404 ◽  
Author(s):  
Jianxiang Tao ◽  
Masanobu Yoda ◽  
Kohei Kimura ◽  
Osamu Okuno
Keyword(s):  
Ti Alloy ◽  
Finish Line ◽  
Metal Ceramic ◽  
Ceramic Crowns

scholarly journals Comparison of Different Cervical Finish Lines of All-Ceramic Crowns on Primary Molars in Finite Element Analysis

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1094 ◽  
Author(s):  
Chin-Yun Pan ◽  
Ting-Hsun Lan ◽  
Pao-Hsin Liu ◽  
Wan-Ru Fu
Keyword(s):  
Finite Element ◽  
Maximum Stress ◽  
Primary Root ◽  
Biomechanical Analysis ◽  
Primary Tooth ◽  
Finish Line ◽  
Element Analysis ◽  
All Ceramic ◽  
Ceramic Crowns ◽  
Loading Type

This study aimed to conduct a stress analysis of four types of cervical finish lines in posterior all-ceramic crowns on the primary roots of molar teeth. Four different types of finish lines (shoulder 0.5 mm, feather-edged, chamfer 0.6 mm, and mini chamfer 0.4 mm) and two all-ceramic crown materials (zirconia and lithium disilicate) were used to construct eight finite element primary tooth models with full-coverage crowns. A load of 200 N was applied at two different loading angles (0° and 15°) so as to mimic children’s masticatory force and occlusal tendency. The maximum stress distribution from the three-dimensional finite element models was determined, and the main effect of each factor (loading type, material, and finish line types) was evaluated in terms of the stress values for all of the models. The results indicated that the loading type (90.25%) was the main factor influencing the maximum stress value of the primary root, and that the feather-edged margin showed the highest stress value (p = 0.002). In conclusion, shoulder and chamfer types of finish lines with a 0.4–0.6 mm thickness are recommended for deciduous tooth preparation, according to the biomechanical analysis.

Finish-line designs for ceramic crowns: A systematic review and meta-analysis

2019 ◽  
Vol 122 (1) ◽  
pp. 22-30.e5 ◽  
Author(s):  
Hao Yu ◽  
Ying-hui Chen ◽  
Hui Cheng ◽  
Takashi Sawase
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Finish Line ◽  
Ceramic Crowns

scholarly journals Influence of Cervical Finish Line Type on the Marginal Adaptation of Zirconia Ceramic Crowns

2009 ◽  
Vol 34 (5) ◽  
pp. 586-592 ◽  
Author(s):  
M. Comlekoglu ◽  
M. Dundar ◽  
M. Özcan ◽  
M. Gungor ◽  
B. Gokce ◽  
...  
Keyword(s):  
Clinical Relevance ◽  
Clinical Applications ◽  
Zirconia Ceramic ◽  
Marginal Adaptation ◽  
Finish Line ◽  
Zirconia Crowns ◽  
Ceramic Crowns ◽  
Line Type

Clinical Relevance Cervical finish line type has an influence on the marginal adaptation of Y-TZP restorations. Both shoulder and mini-chamfer exhibited the least marginal opening values for zirconia crowns and can be recommended for clinical applications.

Influence of finish line design on marginal adaptation of electroformed metal-ceramic crowns

2006 ◽  
Vol 95 (3) ◽  
pp. 237-242 ◽  
Author(s):  
Hisaka Shiratsuchi ◽  
Futoshi Komine ◽  
Yoshiyuki Kakehashi ◽  
Hideo Matsumura
Keyword(s):  
Marginal Adaptation ◽  
Finish Line ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Line Design

scholarly journals Effect of Finish Line on Marginal Fit of Sintered Gold Copings

2013 ◽  
Vol 24 (4) ◽  
pp. 322-325
Author(s):  
Fernanda Pelogia Gwinner ◽  
Marco Antonio Bottino ◽  
Lafayete Nogueira-Junior ◽  
Alvaro Della Bona
Keyword(s):  
Marginal Gap ◽  
Finish Line ◽  
Marginal Fit ◽  
Metal Ceramic ◽  
Ceramic Crowns ◽  
Master Model ◽  
Tooth Preparation ◽  
Student’S T ◽  
Equidistant Points ◽  
Student’S T Test

The aim of this study was to evaluate the vertical marginal gap of sintered gold copings and metal-ceramic crowns with different finish line preparations: a beveled round shoulder (BRS) and a beveled long chamfer (BLC), testing the null hypotheses that there are no differences in marginal gap regardless of finish line and phase of restoration (coping or crown). Stainless steel master models were fabricated to simulate tooth preparation for metal-ceramic crowns with different finish lines (BRS and BLC). Ten dies were obtained from each model. Preparations were coated with 2 layers of spacer to 1 mm from the margin. Sintercast gold copings were prepared, sintered and adjusted to the dies. The copings (n=10) were placed onto the master model and the marginal gap was measured in 24 equidistant points using optical microscopy (X230). An opaque and two body ceramic layers were subsequently applied to the copings and the same measuring procedure was performed for the crowns. The data were analyzed statistically using paired and unpaired Student's t-test (α=0.05). Mean marginal gap values (µm) for the copings and crowns were, respectively: 113.6 and 117.1 for the BRS; and 58.2 and 74.3 for the BLC preparation. Significantly greater marginal gaps (p=0.0307) were found for restorations with BRS than with BLC finish line, which also showed statistically significant differences in the gap size between coping and crown (p=0.001). In conclusion, marginal gap is influenced by ceramic application on copings fabricated on BLC preparation, and greater marginal gaps were found for restorations with BRS finish line, rejecting the experimental null hypotheses.

Consistency of Labial Finish Line Preparation for Metal Ceramic Crowns: An Investigation of a New Bur

2007 ◽  
Vol 0 (0) ◽  
pp. 071117012507002-???
Author(s):  
Kevin G. Seymour ◽  
George P. Cherukara ◽  
Dayananda Y.D. Samarawickrama ◽  
Lifong Zou
Keyword(s):  
Finish Line ◽  
Metal Ceramic ◽  
Ceramic Crowns

scholarly journals Bonding All-Ceramic Restorations with Two Resins Cement Techniques: A Clinical Report of Three-Year Follow-Up

2011 ◽  
Vol 05 (04) ◽  
pp. 478-485 ◽  
Author(s):  
Rodolfo Bruniera Anchieta ◽  
Eduardo Passos Rocha ◽  
Erika Oliveira de Almeida ◽  
Amilcar Chagas Freitas Junior ◽  
Ana Paula Martini
Keyword(s):  
Wide Spectrum ◽  
Resin Cement ◽  
Clinical Report ◽  
Finish Line ◽  
Adhesive Resin ◽  
Luting Cements ◽  
Luting Cement ◽  
All Ceramic ◽  
Ceramic Crowns

ABSTRACTCeramics have been widely used for esthetic and functional improvements. The resin cement is the material of choice for bonding ceramics to dental substrate and it can also dictate the final esthetic appearance and strength of the restoration. The correct use of the wide spectrum of resin luting agents available depends on the dental tooth substrate. This article presents three-year clinical results of a 41 years old female patient B.H.C complaining about her unattractive smile. Two all-ceramic crowns and two laminates veneers were placed in the maxillary incisors and cemented with a self-adhesive resin luting cement and conventional resin luting cement, respectively. After a three-year follow-up, the restorations and cement/teeth interface were clinically perfect with no chipping, fractures or discoloration. Proper use of different resin luting cements shows clinical appropriate behavior after a three-year follow-up. Self-adhesive resin luting cement may be used for cementing all-ceramic crowns with high predictability of success, mainly if there is a large dentin surface available for bonding and no enamel at the finish line. Otherwise, conventional resin luting agent should be used for achieving an adequate bonding strength to enamel. (Eur J Dent 2011;5:478-485)

scholarly journals Evaluation of the marginal fit of full ceramic crowns by the microcomputed tomography (micro-CT) technique

2014 ◽  
Vol 08 (04) ◽  
pp. 437-444 ◽  
Author(s):  
Necla Demir ◽  
Atiye Nilgun Ozturk ◽  
Meral Arslan Malkoc
Keyword(s):  
Microcomputed Tomography ◽  
Marginal Adaptation ◽  
Oxide Ceramic ◽  
Micro Ct ◽  
Ceramic System ◽  
Finish Line ◽  
Group I ◽  
Ceramic Crowns ◽  
Line Design ◽  
Preparation Design

ABSTRACT Objective: To evaluate the marginal gap (MG) and absolute marginal discrepancy (MD) of full ceramic crowns with two finish line designs, shoulder and chamfer, using microcomputed tomography (micro-CT) before and after cementation. Materials and Methods: Sixty extracted human maxillary premolar teeth were divided into two groups based on the finish line design: Group I: 90° shoulder and Group II: 135° chamfer. The specimens were further grouped based on the type of full ceramic crown they received: Group A: Feldspathic Cerec inLab ceramic system, Group B: Cerec inLab aluminum oxide ceramic system and Group C: Lithium disilicate press ceramic system. Before cementation, five crowns from each group were scanned using micro-CT in two sections, sagittal and coronal, to determine the MG and MD values for four regions of the crown (sagittal buccal, sagittal lingual, coronal mesial and coronal distal). After cementation and thermal cycling, the scanning was repeated. Measurements were obtained from 10 points for each region, 80 points totally, to evaluate the MG and MD values. Files were processed using NRecon and CTAn software. Results were statistically analyzed using one- and two-way ANOVA and Tukey HSD tests (P = 0.05). Results: Full ceramic systems showed clinically acceptable marginal adaptation values. The Feldspathic Cerec inLab ceramic system generally presented the lowest variance, except in the MG values of the coronal mesial region. The MG and MD values of all ceramics increased significantly after cementation, except in the shoulder preparation design (sagittal buccal region) for MG and in the chamfer preparation design (sagittal lingual region) for MD values. Conclusions: Full-ceramic crowns showed clinically acceptable marginal adaptation values. The Feldspathic Cerec inLab ceramic system (Vitablocs Mark II) generally presented the lowest variance when compared with the other ceramics, except for the MG values on the mesial surface of the coronal section.

Sign in / Sign up

Export Citation Format

Share Document