Manufacturing Reliable Ceramic Crowns: The Role of Abrasive Machining in Digital Dentistry

2016 ◽  
Author(s):  
Ling Yin ◽  
Abdur-Rasheed Alao ◽  
Xiao-Fei Song ◽  
Richard Stoll
Keyword(s):  
Digital Processing ◽  
Ceramic Materials ◽  
Current Status ◽  
Abrasive Machining ◽  
Digital Dentistry ◽  
Dental Ceramic ◽  
Dental Restorations ◽  
Cad Cam ◽  
Ceramic Restorations

Dental caries is a ubiquitous disease and nearly 100% of the population is affected worldwide. Consequently, reliable dental restorations are in high demand. More and more patients expect and request esthetics and biosafety, and desire metal-free prostheses. Both biocompatible and esthetic ceramics and digital processing of prostheses have been developed to meet these demands. This paper reviews the current status of abrasive machining involved in affordable digital dental ceramic restorations with regard to dental ceramic materials, dental CAD/CAM systems, and extra/intraoral dental handpiece adjustments. It highlights the importance and challenge of abrasive machining technologies in manufacturing of affordable and reliable dental restorations with cutting-edge materials.

scholarly journals VIRTUAL TECHNOLOGIES IN DENTISTRY

2020 ◽  
pp. 606-612
Author(s):  
S.V. KAZUMYAN ◽  
◽  
I.A. DEGTEV ◽  
V.V. BORISOV ◽  
K.A. ERSHOV
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
Interdisciplinary Treatment ◽  
Digital Dentistry ◽  
Dental Restorations ◽  
Technological Advances ◽  
Planning Approach ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

The article represents the information that in the age of digital dentistry, virtual treatment planning is becoming an increasingly important element of dental practice. With new technological advances in computer-aided design and computer-aided manufacturing (CAD/CAM) of dental restorations, predictable interdisciplinary treatment using a reverse planning approach appears to be beneficial and feasible. It is noted that thanks to achievements in medical imaging and computer programming, 2D axial images can be processed into other reformatted representations (sagittal and coronal) and three-dimensional (3D) virtual models representing the patient’s anatomy. It is shown that telemedicine occupies a special place among modern technologies in dentistry, which is used both for remote consultation and for the successful treatment of patients. Keywords: Virtual assistants , virtual nurses, voice technologies, artificial intelligence, virtual reality, 3D printing, telemedicine.

Effects of Polishing versus Glazing on Dental Ceramic Wear: A Comparative In Vitro Study

2021 ◽  
Vol 11 (1) ◽  
pp. 73-79
Author(s):  
Mohammed Abujalala ◽  
A. Nehir Özden
Keyword(s):  
Wear Behavior ◽  
In Vitro Study ◽  
Ceramic Materials ◽  
Volume Loss ◽  
Dental Ceramic ◽  
Chewing Simulation ◽  
System A ◽  
Before And After ◽  
Cad Cam

This study analyzed the wear behavior caused by steatite antagonists to four dental ceramic materials, comparing this between two surface treatments: polishing and glazing. Methods: Thirty flat samples (10 × 8 × 2 mm) were prepared from each of four ceramics: IPS e. max CAD (IPS), GC Initial LiSi Press (LP), Vita Enamic (VE), and monolithic zirconia (MZ). Subgroups of samples were finished by polishing or glazing or neither (as controls). The samples were subjected to computer-controlled chewing simulation (240,000 cycles of 49 N at 1.6 Hz, with thermocycling at 5/55 C), with steatite balls as antagonists. The samples and antagonists were visualized before and after the test with a laser abrasion measurement system, a CAD/CAM scanner, and electron microscopy scanning, and the volumes lost from the tested samples and antagonists were analyzed. Results: For the MZ samples, the polished samples showed significantly less volume loss than the glazed samples (0.0200 mm3 vs. 0.0305 mm3; p =0.0001), whereas there was significantly greater antagonist volume loss (0.0365 mm3 vs. 0.0240 mm3; p = 0.011). There were no significant differences between the subgroups for IPS, VE, and LP, although antagonist volume losses were non-significantly greater with the glazed samples than with the polished samples. Conclusions: Polishing MZ had adverse effects on the corresponding antagonist wear. Glazed MZ showed the lowest antagonist wear.

scholarly journals Esthetic Rehabilitation of Anterior Teeth with Copy-Milled Restorations: A Report of Two Cases

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Sapna Rani ◽  
Jyoti Devi ◽  
Chandan Jain ◽  
Parul Mutneja ◽  
Mahesh Verma
Keyword(s):  
Clinical Success ◽  
Ceramic Materials ◽  
Digital Revolution ◽  
Anterior Teeth ◽  
All Ceramic ◽  
Computer Aided ◽  
Recent Developments ◽  
Cad Cam ◽  
Copy Milling ◽  
Ceramic Restorations

Digitalization has become part and parcel of contemporary prosthodontics with the probability of most of the procedures being based on the digital techniques in the near future. This digital revolution started in the latter half of the 20th century by converting analog objects/signals into digital bits and bytes. Recent developments in all-ceramic materials and systems of computer-aided designing and computer-aided manufacturing (CAD/CAM), copy milling, and so forth offer excellent esthetics and superb biocompatibility. Copy milling system for ceramics enables milling of the zirconia cores of all-ceramic restorations precisely and also if this system is properly used the procedure for fabricating all-ceramic restorations can be substantially simplified. This case report presents fabrication of all-ceramic Maryland Bridge and post-core with a copy milling system for esthetics and preservation of integrity of tooth. For both of the patients, the use of biologic, all-ceramic, copy-milled restorations resulted in clinical success and recovered function and esthetics.

Demystifying Modern Dental Ceramics

2019 ◽  
Vol 8 (3) ◽  
pp. 28-33
Author(s):  
Kasim Butt ◽  
Naren Thanabalan ◽  
Khawer Ayub ◽  
George Bourne
Keyword(s):  
Survival Data ◽  
Survival Rates ◽  
Ceramic Materials ◽  
Clinical Indication ◽  
Dental Ceramics ◽  
High Quality ◽  
Dental Restorations ◽  
Modes Of Failure ◽  
Ceramic Restorations

With increasing patient expectation for aesthetic dental restorations, there has been a drive towards developing ceramic materials to meet this expectation. Multiple ceramic systems have been introduced over the past four decades with considerable advances in material properties. Survival rates of all-ceramic crowns differ by type of ceramic used, fabrication method and clinical indication. Zirconia and lithium disilicate are the most commonly used contemporary ceramic materials in dentistry. Survival data for these types of restorations appears to be promising; however, there is a lack of high-quality long-term clinical data on the success of these restorations. In the absence of robust longitudinal clinical research, laboratory studies have provided some useful information on the performance of ceramic restorations. Further high quality long-term clinical studies are needed to inform us of modes of failure of these restorations and the range of clinical circumstances in which each type of ceramic restoration may be used.

Clinical Success of IPS Empress II Inlays/Onlays

2011 ◽  
Vol 493-494 ◽  
pp. 620-625
Author(s):  
Funda Yanıkoğlu ◽  
Gürol Özyöney ◽  
Nuran Özyöney ◽  
Dilek Tağtekin ◽  
Hesna Öveçoğlu ◽  
...  
Keyword(s):  
Glass Ceramic ◽  
Clinical Performance ◽  
Clinical Success ◽  
Ceramic Materials ◽  
Dental Restorations ◽  
Dental Applications ◽  
Ceramic Restorations

For the dental restorations, ceramic materials have increasing popularities because of their biocompatibility and superior esthetics. IPS Empress which is leucite-reinforced glass ceramic is one of the most popular ceramics. IPS Empress II was developed in following years which is stronger than IPS Empress. In the dental applications some problems occur about ceramic restorations. Hence,this study was performed to examine the six-year clinical performance of IPS Empress II ceramic onlay and inlay restorations.

scholarly journals The Role of Solvents in Lithography-Based Ceramic Manufacturing of Lithium Disilicate

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1045
Author(s):  
Malte Hartmann ◽  
Markus Pfaffinger ◽  
Jürgen Stampfl
Keyword(s):  
Bending Strength ◽  
Lithium Disilicate ◽  
Ceramic Materials ◽  
Processing Technique ◽  
Digital Dentistry ◽  
Photo Polymerization ◽  
Complementary Approach ◽  
Dental Practices ◽  
Ceramic Manufacturing ◽  
Ceramic Restorations

Digital dentistry is increasingly replacing conventional methods of manually producing dental restorations. With regards to computer-aided manufacturing (CAM), milling is state of the art. Additive manufacturing (AM), as a complementary approach, has also found its way into dental practices and laboratories. Vat photo-polymerization is gaining increasing attention, because it enables the production of full ceramic restorations with high precision. One of the two predominantly used ceramic materials for these applications is lithium disilicate, Li2Si2O5. This glass ceramic exhibits a substantial fracture toughness, although possesses much lower bending strength, than the other predominantly used ceramic material, zirconia. Additionally, it shows a much more natural optical appearance, due to its inherent translucency, and therefore is considered for anterior tooth restorations. In this work, an optimized formulation for photo-reactive lithium disilicate suspensions, to be processed by vat photo-polymerization, is presented. Following the fundamental theoretical considerations regarding this processing technique, a variety of solvents was used to adjust the main properties of the suspension. It is shown that this solvent approach is a useful tool to effectively optimize a suspension with regards to refractive index, rheology, and debinding behavior. Additionally, by examining the effect of the absorber, the exposure time could be reduced by a factor of ten.

scholarly journals Is 'Digital Dentistry’ Dangerous for Teeth? Problems Associated with Zirconia and CAD/CAM Restorations

2019 ◽  
Vol 8 (1) ◽  
pp. 52-60 ◽  
Author(s):  
Robert D. Kelly ◽  
Martin G.D. Kelleher
Keyword(s):  
Digital Dentistry ◽  
Metal Free ◽  
Dental Restorations ◽  
Cad Cam ◽  
Dental Professionals

The increasing prescription of metal-free dental restorations has come about as a result of various patient demands and somewhat narcissistic expectations. However, some dental professionals have contributed to the rise in popularity of these materials and techniques. This article highlights the potential pitfalls of undertaking inherently destructive procedures, particularly when performed for questionable “cosmetic” reasons.

scholarly journals Effects of polishing vs. glazing on dental ceramic wear: A comparative in vitro study

2019 ◽  
Author(s):  
Mohammed Abujalala ◽  
A.Nehir Özden
Keyword(s):  
Wear Behavior ◽  
In Vitro Study ◽  
Ceramic Materials ◽  
Volume Loss ◽  
Dental Ceramic ◽  
Chewing Simulation ◽  
System A ◽  
Before And After ◽  
Cad Cam

Abstract Background: This study analyzed the wear behavior caused by steatite antagonists to four dental ceramic materials, comparing this between two surface treatments: polishing and glazing. Methods: Thirty flat samples (10 × 8 × 2 mm) were prepared from each of four ceramics: IPS e.max CAD (IPS), GC Initial LiSi Press (LP), Vita Enamic (VE), and monolithic zirconia (MZ). Subgroups of samples were finished by polishing or glazing or neither (as controls). The samples were subjected to computer-controlled chewing simulation (240,000 cycles of 49 N at 1.6 Hz, with thermocycling at 5/55°C), with steatite balls as antagonists. The samples and antagonists were visualized before and after the test with a laser abrasion measurement system, a CAD/CAM scanner, and electron microscopy scanning, and the volumes lost from the tested samples and antagonists were analyzed.Results: For the MZ samples, the polished samples showed significantly less volume loss than the glazed samples (0.0200 mm3 vs. 0.0305 mm3; p = 0.0001), whereas there was significantly greater antagonist volume loss (0.0365 mm3 vs. 0.0240 mm3; p = 0.011). There were no significant differences between the subgroups for IPS, VE, and LP, although antagonist volume losses were non-significantly greater with the glazed samples than with the polished samples. Conclusions: Polishing MZ had adverse effects on the corresponding antagonist wear. Glazed MZ showed the lowest antagonist wear.

scholarly journals CAD-CAM Occlusal Splints: Milling and Printing Methods

2019 ◽  
Vol 69 (12) ◽  
pp. 3461-3463
Author(s):  
Smaranda Buduru ◽  
Daniel Talmaceanu ◽  
Oana Baru ◽  
Rares Buduru ◽  
Camelia Szuhanek ◽  
...  
Keyword(s):  
Occlusal Splint ◽  
Digital Dentistry ◽  
Temporomandibular Dysfunction ◽  
Time Costs ◽  
Occlusal Splints ◽  
Suitable Solution ◽  
Cad Cam ◽  
Design Software ◽  
Ceramic Restorations

In dentistry, splints are often used as means of protecting teeth, ceramic restorations or for treating temporomandibular dysfunction. Digital dentistry has become a common tool involving the following: intraoral scanners, model scanners, design software, computerized milling or printing. Our study aims at comparing two different methods of producing an occlusal splint (milled and printed) with the end result of determining the most suitable solution for patients in terms of time, costs, efficiency, and medical results.

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