PMID: 7546466Feb 1, 1995Paper

Indirect composite preparation width and depth and tooth fracture resistance

American Journal of Dentistry
D C WattsF J Burke

Abstract

To evaluate the influence of preparation width and depth on the fracture resistance of teeth restored with one type of indirect composite restoration. Variations of depth and width were superimposed on a preparation of dentin design and dimensions with other variables including tooth size and morphology being controlled. Indirect composite restorations were constructed and placed in accordance with manufacturer's instructions. The restored teeth were subjected to compressive loading with fracture being induced by application of a 4 mm steel rod to the specimens in a universal testing machine, at a cross-head speed of 1 mm/minute. Preparation depths of 3 to 4 mm were found to be preferable, but when the prevalence of severe tooth fracture was assessed, the shallower preparation depth was found to be indicated. Cavity depths of one-third and one-half bucco-lingual width were evaluated, the fracturing forces for the group with the narrower width being statistically lower.

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology
Y M Chen
Deutsche zahnärztliche Zeitschrift
R R Miethke
Journal of Periodontology
Isaac Suzart Gomes-FilhoJohelle de Santana Passos
© 2021 Meta ULC. All rights reserved