Comparative Evaluation of the Marginal and Internal Fitness of Monolithic CAD/CAM Zirconia Crowns Fabricated from Different Conventional Impression Techniques and Digital Impression Using Silicone Replica Technique (An in vitro study)

Al-Atyaa, Zainab T.; Majeed, Manhal A.

doi:10.13005/bpj/1397

Cited by 11 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A dentoform upper molar tooth (dentoform, Nissin Dental Product Inc., Tokyo, Japan) was used in this study as a model [12]. According to the standard protocol, the tooth was prepared of all ceramic crown, with 1.5 mm reduction from occlusal and axial, and 1.2 mm in thickness of finishing line on a chrome cobalt alloy master model with a crown fixed denture prosthesis [13].…”

Section: Methodsmentioning

confidence: 99%

The Effect of Thermocycling on Fracture Resistance of CAD- CAM and 3D Printing Provisional Prosthesis

Hadi¹,

Dulami

2022

View full text Add to dashboard Cite

This study aims to assess how thermal cycling affected the fracture strength of temporary restorations made using additive 3D printing procedures and computer-aided design- computer-assisted manufacturing (CAD/CAM), subtractive (milling) methods. For full coverage crowns, a dento form upper molar tooth was created. A second oral scanner digitally scanned developed model. Duplication of the metal dies was made using the master die (chrome cobalt alloy). A total of 40 samples were created and split into two groups: 20 were created using CAD/CAM technology with a (Bilkim) CAD PMMA disc and 20 were created using 3D printing with Asiga dentatooth resin. Thermal cycles (1250 cycles, 5-55 °C) were applied to 10 samples from each group. After that, a universal testing device determined the fracture resistance for each sample. The mean with standard deviation values of fracture resistance were recorded for the milled group before thermocycling (560.50 ±83.581 newton) and after thermocycling (901.00± 311.598 newton) meanwhile the mean ± stander deviation value was recorded with the printed group before thermocycling (1972.50±399.181 Newton) and after thermocycling (2284.10±239.001 Newton), it was found that the printed group recorded statistically significant higher fracture resistance mean value than the milled group. Provisional crowns constructed using the 3D printing technique showed higher fracture resistance compared to the temporary milled crowns.

show abstract

Section: Methodsmentioning

confidence: 99%

The Effect of Thermocycling on Fracture Resistance of CAD- CAM and 3D Printing Provisional Prosthesis

Hadi¹,

Dulami

2022

View full text Add to dashboard Cite

show abstract

“…The most important factors are patient comfort during the impression procedure, time e ciency, simple data communication and storage, and the option for immediate evaluation of tooth preparation. Digital impressions also obviate all fabrication errors that are traditionally encountered, including the deformation of impression materials caused by polymerization shrinkage and gypsum expansion (5)(6)(7). Accuracy refers to the scanner's capacity to capture a precise and highly detailed digital model of the patient's oral cavity (8).…”

Section: Trial Registrationmentioning

confidence: 99%

Trueness of intraoral scanners: Its impact on the trueness and marginal and internal discrepancies of fabricated crowns (A comparative in vitro study)

Ali,

Majeed

2024

Preprint

View full text Add to dashboard Cite

Background Digital dentistry is constantly growing, and the availability of IOSs has significantly increased in recent years. Numerous studies have investigated the accuracy of different intraoral scanners; however, limited evidence is available concerning the effects of the accuracy of IOSs on the fit of zirconia crowns. This study aimed to assess and compare the accuracy of four intraoral scanners in terms of trueness and to analyse its impact on the trueness, as well as the internal and marginal adaptations of zirconia crowns fabricated from these scanners. Methods Ten sound maxillary left first premolar teeth prepared to receive zirconia crowns were used in this research. First, the teeth were scanned with a lab scanner (inEos X5, Dentsply Sirona) as a reference. Each tooth was scanned serially with the following IOSs: PrimerScan, Medit i700 wireless, TRIOS5, and Helios 600. Five monolithic zirconia crowns were fabricated for each tooth, one crown per scanner. The trueness of the tested scanners was determined by the superposition of each IOS's scanned data with the reference scanner's scanned data by metrology software (Geomagic Control X) and presented as a colour-coded map. The accuracy of the fabricated zirconia restoration was assessed by superimposing the scanned data of the intaglio of the crown fabricated from each intraoral scanner with the intaglio of the crown fabricated from the lab scanner (reference crown). The internal and marginal gaps of the crowns were then measured via the silicone replica technique, followed by a 3D evaluation of the replica by the software. The data were analysed using one-way ANOVA and Tukey's HSD multiple comparisons test. Pearson's correlation test assessed the relationships between the trueness of the IOSs and the trueness, internal fit, and marginal fit of the fabricated crowns. Results The tested IOSs revealed significant differences in trueness (p < 0.05). Primescan, Medit i700, and their corresponding crowns showed the highest trueness among the groups, with no significant differences between them (p > 0.05), while Helios 600 and its corresponding crowns showed the lowest trueness. The lowest internal and marginal gaps were observed in the crowns fabricated from Primescan and Medit i700, whereas the highest marginal and internal gaps were observed in the crowns fabricated from Helios 600. A moderately positive correlation was found between the tested IOSs' trueness and the fabricated restorations’ marginal and internal adaptations. Conclusions There were significant differences in trueness between the IOSs, which substantially impacted the trueness and fitness of the produced crowns. Trial registration: The permission for this study was given by the research ethics committee of the College of Dentistry, University of Baghdad. Ref.number: 811/2023.

show abstract

“…polysiloxane elastomeric impressions 15 were made using two steps (putty-wash) impression technique: in the first step, the putty impression was taken before tooth preparation, then the excess material was removed and escape channels were cut in the putty impression using dental scalpel and scalpel 16 blade size 11 17 . The second step was taken after preparation by relining the putty impression with light wash 18 [28].…”

Section: Vinylmentioning

confidence: 99%

“…There should be a relatively smooth transition from the restoration to tooth with no visible restoration opening, overhang or other discrepancy. If the margin appeared to be open along or any catch with the tip of the explorer occurred, rechecking of the restoration complete seating was first done then remnants of temporary cement or other debris on the tooth surface or trapped in the gingiva or on the internal surface of the crown were also checked; c -Internal fit and tightness of the proximal contact were located using pressure indicating paste 28 . The internal surface is coated and the crown seated then removed for checking any binding areas.…”

Section: Intra-oral Trial Fit Of the Restorationsmentioning

confidence: 99%

One Year Clinical Evaluation of E-max Press Crowns Retained with Fiber Reinforced Composite Post Versus E-max Press Endocrowns in Anterior Endodontically Treated Teeth (A Randomized Clinical Trial)

El-Enein

Elguindy

Zaki

2021

BDS

View full text Add to dashboard Cite

Objective: The purpose of this study was to assess patient satisfaction, gross fracture and marginal adaptation of e.max press endocrowns versus e.max press crowns retained with Fiber reinforced composite post (FRCP) and core in upper anterior teeth. Material and methods: The present study included 24 patients seeking root canal treatment in anterior upper arch. The patients received root canal treatment (RCT) then they were randomly assigned into two groups (n=12). The first group received preparation for the IPS e.max crowns retained with FRCP and core and the second group received preparation for the IPS e.max endocrowns. Press technique was used for the fabrication of both restorations using IPS e.max press ingots. Marginal integrity and gross fracture were evaluated using USPHS criteria and a questionnaire was conducted to evaluate patient satisfaction. Data were analyzed using IBM SPSS Statistics for Windows, Version 23.0. Armonk, NY: IBM Corp. Results: There was no statistical significant difference regarding gross fracture of both groups after 12 months (p-value = 0.093, Effect size = 0.447), meanwhile; group 1 was statistically significantly higher than group 2 regarding marginal integrity (p-value = 0.037, Effect size = 0.513). Regarding patient satisfaction FRCP and core group showed statistical significant higher satisfaction than endocrown group (p-value = 0.047, Effect size = 0.447). Conclusion: E.max press endocrowns revealed successful performance similar to e.max press crowns retained with FRCP in terms of gross fracture, however better marginal adaptation and patient satisfaction was obtained with e.max press crowns retained with FRC post and core group. Keywords Anterior teeth; Endocrown; Endodontically treated teeth; Fiber Post; E.max.

show abstract

Comparative Evaluation of the Marginal and Internal Fitness of Monolithic CAD/CAM Zirconia Crowns Fabricated from Different Conventional Impression Techniques and Digital Impression Using Silicone Replica Technique (An in vitro study)

Cited by 11 publications

References 0 publications

The Effect of Thermocycling on Fracture Resistance of CAD- CAM and 3D Printing Provisional Prosthesis

The Effect of Thermocycling on Fracture Resistance of CAD- CAM and 3D Printing Provisional Prosthesis

Trueness of intraoral scanners: Its impact on the trueness and marginal and internal discrepancies of fabricated crowns (A comparative in vitro study)

One Year Clinical Evaluation of E-max Press Crowns Retained with Fiber Reinforced Composite Post Versus E-max Press Endocrowns in Anterior Endodontically Treated Teeth (A Randomized Clinical Trial)

Contact Info

Product

Resources

About