Results 271 to 280 of about 71,499 (301)

Risk factors for failure of class V restorations of carious cervical lesions in general dental practices

Journal of Dentistry, 2018
The aim of this retrospective, non-interventional, multi-center, practice-based study was to analyze factors influencing the survival of restorative treatments of one- and two-surface active cervical (root) caries lesions (CCLs).Records from patients who visited five private practices regularly were searched for the presence of active one- and two ...
Richard Johannes Wierichs, Enno J. Kramer, H. Meyer‐Lueckel   +2 more
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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.
Margareta Rinastiti, Widowati Siswomihardjo, Mutlu Özcan   +2 more
openalex   +3 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 ...
Érika Oliveira de Almeida, Amílcar Chagas Freitas Júnior, Estevam A. Bonfante, Eduardo Passos Rocha, Nelson R.F.A. Silva, Paulo G. Coelho   +5 more
openalex   +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 ...
Vivian Yung Yee Wong, Yoke Kwan Chua, Holy Koh, Kenneth Meng Tze Low   +3 more
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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
Michael Gahlert, Doris Burtscher, George Pfundstein, Ingrid Grunert, Heinz Kniha, Stefan Roehling   +5 more
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Dental restoration longevity: survival functions and statistical indices in low and high failure rate groups

Community Dentistry and Oral Epidemiology, 1988
Abstract A group of 71 patients was examined to determine the longevity of restorations placed at the University of North Carolina School of Dentistry. Patients with an overall restorations failure rate of equal to or greater than 40 per 1000 restoration‐yr were categorized as having a “high failure rate” and those below that were considered “low ...
Claude W. Drake
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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).
Ignacio Aliaga, Juan F. De Paz, Vicente Vera, Álvaro Enrique García Barbero, Javier Bajo   +4 more
openalex   +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.
Cláudia Cristina Brainer de Oliveira Mota, H. U. K. S. Kashyap, Bernardo B. C. Kyotoku, Anderson S. L. Gomes   +3 more
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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 ...
J.D. Overton, Diane J. Sullivan
openalex   +4 more sources

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Failure mode of dental restorative materials under Hertzian indentation

Dental Materials, 2007
To explore the application of Hertzian indentation testing to amalgam and GIC; study the failure behavior of the bi-layer structure of each material on a relatively soft substrate; and investigate the effect of thickness.Amalgam (Lojic+, SDI, Bayswater, Australia) and ceramic-reinforced GIC (Advanced Healthcare, Tonbridge, UK) discs, 10 mm diameter ...
Yan Wang, Brian W. Darvell
openaire   +3 more sources