scholarly journals Tooth preparation, digital design and milling process considerations for CAD/CAM crowns: Understanding the transition from analog to digital workflow

2021 ◽  
Author(s):  
Ilser Turkyilmaz ◽  
Gregory Neil Wilkins ◽  
Giuseppe Varvara
Keyword(s):  
Milling Process ◽  
Digital Design ◽  
Digital Workflow ◽  
Analog To Digital ◽  
Cad Cam ◽  
Tooth Preparation

scholarly journals Digital planning and guided surgery in oral rehabilitation

2020 ◽  
Author(s):  
Larissa Braga dos Santos ◽  
Adriano Relvas Barreira de Oliveira ◽  
Mauro Lefrançois ◽  
Marcos Venício Azevedo ◽  
Pablo Sotelo ◽  
...  
Keyword(s):  
Surgical Planning ◽  
Three Dimensional ◽  
Oral Rehabilitation ◽  
Digital Workflow ◽  
Surgical Guide ◽  
Surgical Guides ◽  
Digital Planning ◽  
Cad Cam ◽  
Correct Understanding ◽  
Plaster Model

Digital planning of the prosthesis associated with surgical planning increased predictability, since surgical guides indicate the best place for implant installation, thus reducing the number of complications, and the CAD/CAM system provides predictability in the preparation of final restorations, according to the procedure previously planned. Our study reported a digital workflow used for the guided installation of two dental implants in regions 14 and 16, extraction of tooth 15 and installation of a fixed prothesis over implants. After anamnesis and clinical evaluation, intra- and extra-oral photographs of the patient were performed, molding the upper arch with polyvinylsiloxane (2-step putty/light-body technique) and requesting computed tomography. The plaster model obtained was sent to the laboratory and scanned. The generated file (STL) was used to create a diagnostic wax-up that was aligned to the tomography (in DICOM format), enabling the three-dimensional planning of the implants, which generated a partial printed surgical guide after approval of the dentist. After six months, the patient received the provisional fixed prosthesis printed in PMMA (polymethylmethacrylate) on an intermediate in PEEK (polyetheretherketone) aiming to condition an emergency profile to receive a definitive prosthesis two months later, with zirconia-milled infrastructure on a ti-base. The correct understanding of the operator about the steps of the digital workflow (diagnosis, prosthetic planning, surgical planning, guide preparation, temporary and final restorations) gives the operator improved predictability at the time of surgery as well as satisfactory aesthetic and functional result of definitive restorations.

scholarly journals Technical and Biological Complications of Screw-Retained (CAD/CAM) Monolithic and Partial Veneer Zirconia for Fixed Dental Prostheses on Posterior Implants Using a Digital Workflow: A 3-Year Cross-Sectional Retrospective Study

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Paolo De Angelis ◽  
Giulio Gasparini ◽  
Francesca Camodeca ◽  
Silvio De Angelis ◽  
Margherita Giorgia Liguori ◽  
...  
Keyword(s):  
Survival Rate ◽  
Cross Sectional ◽  
Digital Workflow ◽  
Fixed Dental Prosthesis ◽  
Significant Difference ◽  
Cad Cam ◽  
Study Population ◽  
Clinically Significant ◽  
Technical Complication ◽  
Ceramic Restorations

Objective. The introduction of CAD/CAM and the development of zirconia-based restorations have allowed clinicians to use less expensive materials and faster manufacturing procedures. The purpose of the study was to analyze the differences, in terms of mechanical and biological complication, in multiunit zirconia fixed dental prosthesis (FPDs) on posterior implants produced using a digital workflow. Method and Materials. This study was a retrospective investigation, and patients treated with screw-retained monolithic or partial veneer FPDs on dental implants were selected. Periapical radiographs were taken at baseline and at the 3-year follow-up. Complications were recorded and classified as technical and biological ones. Results. The study population included 25 patients. The occlusal and interproximal corrections were not clinically significant. In the study sample, the survival rate and success rate of the FPDs after 3 years were 100% and 96%, respectively. One implant failed immediately after placement. Conclusion. Monolithic zirconia FPDs and partial veneer FPDs showed a 100% survival rate, presenting an interesting alternative to metal ceramic restorations. The partial veneer FPDs had a higher technical complication rate than the monolithic FPDs; however, no statistically significant difference was found.

scholarly journals Customized 3D-Printed Titanium Mesh Developed to Regenerate a Complex Bone Defect in the Aesthetic Zone: A Case Report Approached with a Fully Digital Workflow

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3874 ◽  
Author(s):  
Marco Tallarico ◽  
Chang-Joo Park ◽  
Aurea Immacolata Lumbau ◽  
Marco Annucci ◽  
Edoardo Baldoni ◽  
...  
Keyword(s):  
Female Patient ◽  
Computer Aided Design ◽  
Digital Technologies ◽  
Titanium Mesh ◽  
Digital Workflow ◽  
Anterior Maxilla ◽  
Ridge Augmentation ◽  
Implant Placement ◽  
Computer Aided ◽  
Cad Cam

Alveolar-ridge augmentation, anterior aesthetics, and digital technologies are probably the most popular topics in the dental-implant field. The aim of this report is to present a clinical case of severe atrophy of the anterior maxilla in a younger female patient, treated with a titanium membrane customized with computer-aided design/computer-aided manufacturing (CAD/CAM), simultaneous guided implant placement, and a fully digital workflow. A young female patient with a history of maxillary trauma was treated and followed-up for 1 year after implant placement. A narrow implant was inserted in a prosthetically driven position with the aid of computer-guided surgery. In the same surgical section, a customized implantable titanium mesh was applied. The scaffold was designed according to the contralateral maxillary outline in order to recreate a favorable maxillary bone volume. Finally, highly aesthetic, CAD/CAM, metal-free restorations were delivered using novel digital technologies.

scholarly journals Performance based approach in design of freeform space structures

2017 ◽  
Vol 15 (2) ◽  
pp. 153-166
Author(s):  
Miodrag Nestorovic ◽  
Predrag Nestorovic ◽  
Jelena Milosevic
Keyword(s):  
Design Process ◽  
Rational Design ◽  
Optical Measurement ◽  
Digital Fabrication ◽  
Digital Design ◽  
Physical Models ◽  
Design Solution ◽  
Roof Structure ◽  
Cad Cam ◽  
Context Specific

This paper is related to the fact that use of computational tools for form generation, analysis and digital fabrication (CAD/CAM/CAE) in an efficient way enables accurate representation of ideas, simulation of diverse impact and production of rational design solutions. Application of geometrical and numerical computational methods and adoption of performance based priorities enables formal exploration in constrained conditions and improvement of architectural engineering design process. Implementation of advanced technologies in 3D digital design process facilitates production of unconventional complex designs, their verification by construction of physical models and experimental diagnostics, as phase preceding construction of real structure. Within this work concept that provides design of non-standard, context-specific, freeform structure using rapid prototyping technology and 3D optical measurement will be reviewed. The analyzed design solution of roof structure above atrium of National Museum in Belgrade has a function to demonstrate the effectiveness of this approach.

scholarly journals In Vitro Evaluation of the Effect of Different Luting Cements and Tooth Preparation Angle on the Microleakage of Zirconia Crowns

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Behnaz Ebadian ◽  
Amirhossein Fathi ◽  
Melika Savoj
Keyword(s):  
Resin Cement ◽  
Cement Type ◽  
Digital Photograph ◽  
Luting Cements ◽  
Luting Cement ◽  
Cad Cam ◽  
Zirconia Crowns ◽  
Tooth Preparation ◽  
Cementing Agent

Introduction. Discrepancy between the crown border and prepared tooth margin leads to a microleakage that eases the penetration of microorganisms and causes the dissolution of luting cement consequently. Several factors should be considered to achieve optimal fitness, including tooth preparation taper and type of cementing agent. The study aimed to determine the relation of tooth preparation taper and cement type on the microleakage of zirconia crowns. Materials and Methods. Fifty-six freshly extracted premolars without caries and restorations were selected as the study sample and divided into two groups of different tapering degrees (6 and 12 degrees). Zirconia copings were designed and fabricated by the CAD/CAM system. The samples were divided into four subgroups for cementation, and each subgroup was cemented with a different luting cement (n = 7). After 5000 thermocycles at 5°C–55°C and dye penetration, the specimens were sectioned in the mid-buccolingual direction, and a digital photograph of each section was taken under a stereomicroscope. Data were analyzed by the Kruskal–Wallis and Mann–Whitney tests (α = 0.05). Results. The results showed significant differences among the four types of luting cement in marginal permeability (PV < 0.001). Regardless of the type of cement, the 12-degree tapering resulted in a lower microleakage (46.4% without microleakage) with statistically significant differences from the 6-degree tapering (PV = 0.042). Conclusion. Within the limitations of this study, increasing the tapering degree of the prepared tooth for CAD/CAM zirconia copings improved the marginal fit and decreased the microleakage score. In addition, total-etch resin cement indicated the least microleakage.

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