Surface Evaluation of Milled Chairside CAD/CAM Materials Based on Manufacturing Speed.

Aim: The aim is to record the surface roughness of monolithic chairside CAD/CAM zirconia materials to evaluate the influence of milling speed on the ability to achieve a clinically desirable surface. The null hypothesis is that there is no significant difference in the surface roughness of different zirconia materials based on the speed of subtractive milling.

Materials And Methods: All test samples were milled from four different monolithic CAD/CAM zirconia blocks including CEREC Zirconia (Dentsply Sirona), CEREC Zirconia+ (Dentsply Sirona), CEREC MTL Zirconia (Dentsply Sirona), and Katana Zirconia (Kuraray Noritake).

Virtual clinic: Applying technology to expand dental school walls.

Dental education traditionally requires the use of dedicated fixed preclinic facilities to provide clinically relevant experiences to support the development of dexterity, critical thinking, and self-assessment skills that are essential for excellent patient care. As a result of the social distancing guidelines instituted at the height of the COVID pandemic, dental education was severely affected when education pivoted to remote instruction and had significant restrictions on in-person training. This study evaluated a novel application of modern technology to allow students to perform clinically relevant hands-on exercises away from dental school and, most importantly, receive feedback on their performance as an aid in their development.

Keys to Predictable Digital Impressions.

Conventional impressions are the benchmark for any new replication technique due to the demonstrated accuracy of PVS and polyether impression materials.1 However, it is well known that throughout the impression process there are potential risks to final accuracy, including setting of the impression material, removal of the impression, and fabrication of the stone model.2-4 Despite the documented accuracy of PVS and polyether impressions, studies have repeatedly shown that most impressions sent to dental laboratories have some sort of deficiency.

Surface Evaluation of Resilient CAD/CAM ceramics after Contouring and Polishing.

Objective: This in-vitro study measured the differences in surface roughness for computer assisted design/computer assisted manufacturing (CAD/CAM) resilient ceramic and CAD/CAM composite materials.

Materials And Methods: The materials included Lava Ultimate (3 M), Cerasmart (GC America), Vita Enamic (Vita Zahnfabrik), and Brilliant Crios (Coltene). One calibrated operator polished each material with three polishing sytems: spiral polishers (Diacomp FeatherLite/Brasseler), rubbercup polishers (Enhance/DentsplyCaulk), and brush-paste (Diashine/VH Technologies).

Tooth-cusp preservation with lithium disilicate onlay restorations: A fatigue resistance study.

Objectives: This study examined the in vitro fatigue resistance of maxillary premolars with 2 mm or 3 mm preserved cusp thicknesses restored with lithium disilicate onlays.

Materials And Methods: Premolars(N = 48) were divided into six groups. Onlays for groups 1 to 4 preserved a 3 mm functional (G1), 2 mm functional (G2), 3 mm nonfunctional (G3), or 2 mm nonfunctional (G4) buccal-lingual cusp width.

Clinical evaluation of chairside Computer Assisted Design/Computer Assisted Machining nano-ceramic restorations: Five-year status.

Objectives: This investigation was a longitudinal, randomized clinical trial to measure the clinical performance of a nano-ceramic material (Lava Ultimate/3M) for chairside Computer Assisted Design/Computer Assisted Machining (CAD/CAM) fabricated restorations.

Materials And Methods: One hundred and twenty chairside CAD/CAM onlays were restored with a CEREC system randomly assigned to 60 leucite-reinforced ceramic (IPS EmpressCAD/Ivoclar Vivadent AGBendererstrasse 2FL-9494 SchaanLiechtenstein) onlays and 60 nano-ceramic (Lava Ultimate/3M) onlays. Equal groups of onlays were cemented using a self-etch and a total etch adhesive resin cement.

Repair or Observation of Resin Margin Defects: Clinical Trial After Five Years.

Objective: To assess the effectiveness of repair/resealing of stained composite margins as an alternative to controlled observation without treatment in a randomized clinical trial after five years.

Methods And Materials: Each patient recruited had from one to three composite restorations with visible margin discoloration. Initially, the characteristics of each defect were recorded with direct vision through a surgical microscope at 20× magnification.

Influence of Different CAM Strategies on the Fit of Partial Crown Restorations: A Digital Three-dimensional Evaluation.

Objective: CAM fabrication is an important step within the CAD/CAM process. The internal fit of restorations is influenced by the accuracy of the subtractive CAM procedure. Little is known about how CAM strategies might influence the fit of CAD/CAM fabricated restorations.

Three-Dimensional Digital Evaluation of the Fit of Endocrowns Fabricated from Different CAD/CAM Materials.

Purpose: A wide variety of CAD/CAM materials are available for single-tooth restorations. CAD/CAM material characteristics are different and may influence CAM fabrication accuracy. There is no study investigating the influence of different CAD/CAM materials on the final fit of the restoration.

Digital evaluation of the fit of zirconia-reinforced lithium silicate crowns with a new three-dimensional approach.

Objective: Several methods for the evaluation of fit of computer-aided design/computer-assisted manufacture (CAD/CAM)-fabricated restorations have been described. In the study, digital models were recorded with an intraoral scanning device and were measured using a new three-dimensional (3D) computer technique to evaluate restoration internal fit. The aim of the study was to evaluate the internal adaptation and fit of chairside CAD/CAM-fabricated zirconia-reinforced lithium silicate ceramic crowns fabricated with different post-milling protocols.

Full-Contour Zirconia Fixed Partial Dentures as Chairside Applications: A Case Report.

Clinical application of zirconia has been expanding due to the high strength properties it offers. Initial use of zirconia was as a coping or substructure material replacing cast metal. More recent formulations have been introduced for monolithic zirconia contour designs.

Surface Evaluation of Polishing Techniques for New Resilient CAD/CAM Restorative Materials.

Purpose: The purpose of this study was to measure the surface roughness of milled chairside computer-assisted design/computer assisted machining (CAD/CAM) restorations using several contouring/polishing systems as to their effectiveness for creating a clinically acceptable surface.

Materials And Methods: One hundred onlays were milled from monolithic CAD/CAM blocks with an MCXL milling chamber (Sirona Dental) as follows: 30 resin nano-ceramic (Lava Ultimate, 3M ESPE), 30 hybrid ceramic (Enamic, Vita) and 40 leucite-reinforced ceramic (EmpressCAD, Ivoclar). A single group of EmpressCAD onlays was glazed-fired in a porcelain oven (Programat CS2, Ivoclar).

Grand rounds for dental students: an exploration.

Grand Rounds are widely used in medicine for educating students comprehensively about clinical issues. The aim of this study was to explore the value of Grand Rounds for introducing first- (D1) and second-year (D2) dental students to an interdisciplinary approach to dental care. The objectives were to explore how interested students were in various topics, which topics they would like to see addressed in future sessions, which aspects they liked/disliked, how they evaluated the program components, and how they evaluated the outcomes.

Computerized technology for restorative dentistry.

Computers have had a meaningful impact on the dental office and dental practice leading to significant changes in communication, financial accounting, and administrative functions. Computerized systems have more recently generated increasing diversity of application for the delivery of patient treatment. Digital impression systems and chairside CAD/CAM systems offer opportunities to integrate digital impressions and full contour restorations in the dental office.

Using digital technology to enhance restorative dentistry.

While there are many benefits for dental practices that incorporate digital systems into their workflow, the dental team must first master the learning curve involved in order to maximize their advantages for creating well-fitting restorations. This article describes the current systems-both digital impression systems and chairside CAD/CAM systems-including software and digital cameras and scanners. The author emphasizes that to consistently capture accurate impressions with this technology, the dental team must continue to rely on traditional skills such as achieving optimal soft-tissue retraction and maintaining moisture control and isolation.

Chairside CAD/CAM: an overview of restorative material options.

A number of categories of materials are available for chairside CAD/CAM restorations that have demonstrated predictability and longevity. These materials include esthetic and high-strength ceramics, composite resins for both final and temporary restorations, and newer nanoceramics that offer ease of handling and a glossy surface finish. Each category of materials has unique features designed for specific clinical applications.

Accuracy of CAD/CAM crown fit with infrared and LED cameras.

Purpose: The intraoral recording of digital images is a critical component of fabricating accurate Cerec restorations. This study evaluated the marginal fit and internal adaptation of Cerec ceramic crowns fabricated using different cameras, alternative powdering materials, and multiple image capture sequences.

Materials And Methods: A master epoxy resin model was fabricated using a polyvinylsiloxane (PVS) impression of a typodont with an all-ceramic crown preparation on tooth 14.

Accuracy of occlusal contacts for crowns with chairside CAD/CAM techniques.

Information from the opposing dentition is used to design and fabricate occlusal contacts with a reasonable level of accuracy for a given restoration. The dental database with the antagonist design process utilizes a bite registration to propose the construction of a virtual opposing model. The Articulation design technique utilizes a functionally generated bite registration to control both the maximum intercuspation and excursive contacts on the restoration.

Materials for chairside CAD/CAM restorations.

Chairside computer-aided design/computer-aided manufacturing (CAD/CAM) systems have become considerably more accurate, efficient, and prevalent as the technology has evolved in the past 25 years. The initial restorative material option for chairside CAD/CAM restorations was limited to ceramic blocks. Restorative material options have multiplied and now include esthetic ceramics, high-strength ceramics, and composite materials for both definitive and temporary restoration applications.

Digital dentistry: innovation for restorative treatment.

The evolution of digital technology and computer-aided design/computer-aided manufacture (CAD/CAM) systems are creating exciting opportunities for improving the delivery of restorative dentistry. Digital systems now offer the opportunity to avoid traditional, analog impressions, including the usual impression materials, time, and handling limitations associated with them. Intraoral scanners have the potential to offer excellent accuracy with a more comfortable experience for the patient and more efficient workflow for the office.