Results 291 to 300 of about 100,978 (347)

Comparison of shear and microtensile failure stresses in the repair of dental composite restorations

2011 2nd International Conference on Instrumentation, Communications, Information Technology, and Biomedical Engineering, 2011
Failure of dental composite restorations frequently occurs. To preserve tooth structure, repair of existing restorations can be done by relayering (composite-to-composite-bonding). This study compares shear and microtensile failure in composite-to-composite-bonding.
Mutlu Özcan, Margareta Rinastiti, Widowati Siswomihardjo   +2 more
openaire   +3 more sources

Mechanical Failure of Dental Restorations: The Weakest-Link Theory

, 2020
Tooth tissues and many of the dental restorative materials, e.g. ceramics and resin composites, are brittle in nature. It is typical of these materials to show a large variation in their fracture strength. A mechanistic approach which can account for their complex shapes and stress distributions is needed in the design and performance optimization of ...
Alex Fok, Hooi Pin Chew
openaire   +3 more sources

The differences between three performance measures on dental restorations, clinical success, survival and failure: A matter of perspective

Dental Materials, 2019
The aim of this retrospective methodology study was to investigate the influence of using different definitions for restoration failure and inclusion criteria on restoration longevity expressed in AFR.EPF from fifteen general dental practices were used for collecting the data for this study. From the EPF, 321,749 composite restorations placed in 52,245
Laske, M., Opdam, N.J.M., Bronkhorst, E.M., Bronkhorst, E.M., Braspenning, J.C.C., Huysmans, M.C.D.N.J.M.   +5 more
openaire   +5 more sources

Effect of microthread presence and restoration design (screw versus cemented) in dental implant reliability and failure modes

Clinical Oral Implants Research, 2012
AbstractObjectivesThis study evaluated the reliability and failure modes of implants with a microthreaded or smooth design at the crestal region, restored with screwed or cemented crowns. The postulated null hypothesis was that the presence of microthreads in the implant cervical region would not result in different reliability and strength to failure ...
Almeida, Erika O., Freitas Júnior, Amilcar C., Bonfante, Estevam A., Rocha, Eduardo Passos, Silva, Nelson R. F. A., Coelho, Paulo G.   +5 more
openaire   +5 more sources

A retrospective cross-sectional study of early patient-reported failures of direct restorations placed in a primary dental care setting

British Dental Journal, 2021
Introduction A retrospective cross-sectional study of early patient-reported failures of restorations was initiated to understand the reasons and factors associated with early failure. Early patient-reported failures are defined as restorations requiring replacement within three months of placement.Aim To investigate if restorative material placed or ...
Yoke Kwan Chua, Holy Jr Koh, Kenneth Meng Tze Low, Vivian Yung Yee Wong   +3 more
openaire   +4 more sources

Dental Zirconia Implants up to Three Years in Function: A Retrospective Clinical Study and Evaluation of Prosthetic Restorations and Failures

The International Journal of Oral & Maxillofacial Implants, 2013
The clinical evaluation of one-piece zirconia dental implants with different diameters to determine survival rate and type of implant failure.Information concerning implant surgery (number, diameter, length, and position of inserted implants; patient age, sex, risk factors, and bone quality) was extracted from the clinical records. All treated patients
George Pfundstein, Ingrid Grunert, Doris Burtscher, Stefan Roehling, Michael Gahlert, Heinz Kniha   +5 more
openaire   +4 more sources

Types of Failures in Porcelain-Fused-to-Metal Dental Restoration

, 2015
Porcelain-fused-to-metal (PFM) restoration is a type of dental prosthesis introduced since the early 1960s. This prosthesis is strong, aesthetically satisfactory, and affordable. This study aims to classify the types of failures observed in PFM prostheses that were constructed in a dental laboratory in Misrata, Libya. Data from six months of laboratory
Che Husna Azhari, Norziha Yahaya, Andanastuti Muchtar, Mohamed Aboras   +3 more
openaire   +3 more sources

Prediction and failure analysis of composite resin restorations in the posterior sector applied in teaching dental students

Journal of Ambient Intelligence and Humanized Computing, 2020
The failure of composite resin restorations in the posterior region is an ongoing concern in current clinical practice This study assesses possible factors and causes of the failure of restoration 1 year after their placement by fourth year dental students (on a 5-year degree course).
Aliaga, Ignacio, De Paz, Juan F., Vera, Vicente, Garc?a, ?lvaro E., Bajo, Javier   +4 more
openaire   +4 more sources

Application of Optical Coherence Tomography to detect failures at the enamel dental restoration interface— an in vivo study

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference, 2009
Dental restoration interfaces can present failures, known as marginal microleakage. These failures are extremely difficult to diagnose and can develop into recurrent caries if left untreated. The most common tool used for diagnostic imaging in dentistry, X-ray, is not able to visualize micrometric structures.
Bernardo B. C. Kyotoku, Cláudia C. B. O. Mota, Anderson S. L. Gomes, H. U. K. S. Kashyap   +3 more
openaire   +3 more sources

Early Failure of Class II Resin Composite Versus Class II Amalgam Restorations Placed by Dental Students

Journal of Dental Education, 2012
Using the information from remake request slips in a dental school's predoctoral clinic, we examined the short‐term survival of Class II resin composite restorations versus Class II dental amalgam restorations. In the student clinic, resin composite is used in approximately 58 percent of Class II restorations placed, and dental amalgam is used in the ...
Diane J. Sullivan, J.D. Overton
openaire   +4 more sources