A systematic review of <scp>CAD</scp>/<scp>CAM</scp> fit restoration evaluations

Boitelle, Philippe; Mawussi, Bernardin; Tapie, Laurent; Fromentin, Olivier

doi:10.1111/joor.12205

Cited by 219 publications

(207 citation statements)

References 161 publications

Supporting

Mentioning

155

Contrasting

Unclassified

Order By: Relevance

“…The clinically allowable marginal gaps of dental prostheses have been described in numerous studies. Some authors have reported marginal gaps under 120 µm to be clinically allowable for traditional fixed prostheses 13. Others have reported marginal gaps of 160 - 172 µm to be clinically acceptable for conventional crowns, with an acceptable marginal gap range of under 200 µm and occlusal gap range of under 250 - 300 µm 23242526.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the fit accuracy of zirconia-based prostheses generated by two CAD/CAM systems

Cho

2016

J Adv Prosthodont

View full text Add to dashboard Cite

PURPOSEThe purposes of this study are to evaluate the internal and marginal adaptation of two widely used CAD/CAM systems and to study the effect of porcelain press veneering process on the prosthesis adaptation.MATERIALS AND METHODSMolar of a lower jaw typodont resin model was prepared by adjusting a 1.0 mm circumferential chamfer, an occlusal reduction of 2.0 mm, and a 5° convergence angle and was duplicated as an abrasion-resistant master die. The monolithic crowns and copings were fabricated with two different CAD/CAM system-Ceramil and Zirkonzahn systems. Two kinds of non-destructive analysis methods are used in this study. First, weight technique was used to determine the overall fitting accuracy. And, to evaluate internal and marginal fit of specific part, replica technique procedures were performed.RESULTSThe silicone weight for the cement space of monolithic crowns and copings manufactured with Ceramil system was significantly higher than that from Zirkonzahn system. This gap might cause the differences in the silicone weight because the prostheses were manufactured according to the recommendation of each system. Marginal discrepancies of copings made with Ceramil system were between 106 and 117 µm and those from Zirkonzahn system were between 111 and 115 µm. Marginal discrepancies of copings made with Ceramil system were between 101 and 131 µm and those from Zirkonzahn system were between 116 and 131 µm.CONCLUSIONMarginal discrepancy was relatively lower in Ceramil system and internal gap was smaller in Zirkonzahn system. There were significant differences in the internal gap of monolithic crown and coping among the 2 CAD/CAM systems. Marginal discrepancy produced from the 2 CAD/CAM systems were within a reported clinically acceptable range of marginal discrepancy.

show abstract

Section: Discussionmentioning

confidence: 99%

Comparison of the fit accuracy of zirconia-based prostheses generated by two CAD/CAM systems

Cho

2016

J Adv Prosthodont

View full text Add to dashboard Cite

show abstract

“…Nevertheless, other studies have underlined the superiority of adaptation of crowns created using optical impressions compared to those using conventional impressions 7121314151617. As an indirect CAD/CAM technique, conventional impressions are transmitted to a prosthetist who then conducts the digital acquisition of the data, by scanning either the impression or the model itself.…”

Section: Discussionmentioning

confidence: 99%

Adaptation of zirconia crowns created by conventional versus optical impression:in vitrostudy

et al. 2017

View full text Add to dashboard Cite

PURPOSEThe aim of this study was to compare the precision of optical impression (Trios, 3Shape) versus that of conventional impression (Imprint IV, 3M-ESPE) with three different margins (shoulder, chamfer, and knife-edge) on Frasaco teeth.MATERIALS AND METHODSThe sample comprised of 60 zirconia half-crowns, divided into six groups according to the type of impression and margin. Scanning electron microscopy enabled us to analyze the gap between the zirconia crowns and the Frasaco teeth, using ImageJ software, based on eight reproducible and standardized measuring points.RESULTSNo statistically significant difference was found between conventional impressions and optical impressions, except for two of the eight points. A statistically significant difference was observed between the three margin types; the chamfer and knife-edge finishing lines appeared to offer better adaptation results than the shoulder margin.CONCLUSIONZirconia crowns created from optical impression and those created from conventional impression present similar adaptation. While offering identical results, the former have many advantages. In view of our findings, we believe the chamfer margin should be favored.

show abstract

“…Several dental researchers have reportedd that the clinically acceptable marginal gap for cast restorations is less than 160 µm. [1415] Larger marginal gap leads to dissolution of luting cement and subsequent periodontal and caries disease activities. The results of this study are in agreement with the findings of Davis et al .…”

Section: Discussionmentioning

confidence: 99%

The effect of casting ring liner length and prewetting on the marginal adaptation and dimensional accuracy of full crown castings

Haralur

Hamdi

Alshahrani

et al. 2017

J Int Soc Prevent Communit Dent

View full text Add to dashboard Cite

Aim:To evaluate the effect of varying cellulose casting ring liner length and its prewetting on the marginal adaptation and dimensional accuracy of full veneer metal castings.Materials and Methods:The master die was milled in stainless steel to fabricate the wax pattern. Sixty wax patterns were fabricated with a uniform thickness of 1.5 mm at an occlusal surface and 1 mm axial surface, cervical width at 13.5 mm, and 10 mm cuspal height. The samples were divided into six groups (n = 10). Groups I and II samples had the full-length cellulose prewet and dry ring liner, respectively. The groups III and IV had 2 mm short prewet and dry cellulose ring liner, respectively, whereas groups V and VI were invested in 6 mm short ring liner. The wax patterns were immediately invested in phosphate bonded investment, and casting procedure was completed with nickel-chrome alloy. The castings were cleaned and mean score of measurements at four reference points for marginal adaption, casting height, and cervical width was calculated. The marginal adaption was calculated with Imaje J software, whereas the casting height and cervical width was determined using a digital scale. The data was subjected to one-way analysis of varaince and Tukey post hoc statistical analysis with Statistical Package for the Social Sciences version 20 software.Results:The group II had the best marginal adaption with a gap of 63.786 μm followed by group I (65.185 μm), group IV (87.740 μm), and group III (101.455 μm). A large marginal gap was observed in group V at 188.871 μm. Cuspal height was more accurate with group V (10.428 mm), group VI (10.421 mm), and group II (10.488 mm). The cervical width was approximately similar in group I, group III, and group V. Statistically significant difference was observed in Tukey post hoc analysis between group V and group VI with all the other groups with regards to marginal adaptation.Conclusion:The dry cellulose ring liners provided better marginal adaptation in comparison to prewet cellulose ring liners. Accurate cuspal height was obtained with shorter ring liner in comparison to full-length cellulose ring liners.

show abstract

A systematic review of CAD/CAM fit restoration evaluations

Cited by 219 publications

References 161 publications

Comparison of the fit accuracy of zirconia-based prostheses generated by two CAD/CAM systems

Comparison of the fit accuracy of zirconia-based prostheses generated by two CAD/CAM systems

Adaptation of zirconia crowns created by conventional versus optical impression:in vitrostudy

The effect of casting ring liner length and prewetting on the marginal adaptation and dimensional accuracy of full crown castings

Contact Info

Product

Resources

About