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Related Concept Videos

Fractures: Bone Repair01:27

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Microcracking in Concrete01:20

Microcracking in Concrete

Microcracking in concrete refers to the tiny cracks that can form within the material even before any external load is applied. These microcracks typically occur at the interface between the coarse aggregate and the hydrated cement paste, often as a result of differential volume changes prompted by variations in stress-strain behavior, as well as thermal and moisture movement. Initially, these microcracks remain stable and do not grow substantially until the concrete is stressed to about 30...
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Bleeding in Fresh Concrete

Bleeding in fresh concrete occurs when water from the mix rises to the surface. This happens because the mix's solid components fail to retain all the water as they settle, leading to separation where water collects at the top. The severity of bleeding can be measured by assessing the total settlement or by noting the decrease in height per unit height of concrete.
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Tensile Strength Considerations of Concrete01:16

Tensile Strength Considerations of Concrete

Considering the tensile strength of concrete involves recognizing that the theoretical strength of cement paste can be up to a thousand times higher than what is observed in practical applications. This significant discrepancy is largely attributed to the presence of microscopic cracks within the concrete. These cracks tend to amplify stress at their tips when a load is applied, a phenomenon explained by Griffith's theory of brittle fracture.
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A Reproducible Cartilage Impact Model to Generate Post-Traumatic Osteoarthritis in the Rabbit
08:42

A Reproducible Cartilage Impact Model to Generate Post-Traumatic Osteoarthritis in the Rabbit

Published on: November 21, 2023

Multiple cemental tears.

Chie Watanabe1, Yoshihisa Watanabe, Mutsumi Miyauchi

  • 1Watanabe Dental Clinic, 1870-6 Kusabuka Numakuma Town, Fukuyama City, Hiroshima Prefecture, Japan. y.watanabe@fkym.enjoy.ne.jp

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
|August 7, 2012
PubMed
Summary
This summary is machine-generated.

Multiple cemental tears, a rare dental condition, were found in 14 teeth of a single patient. This case challenges previous reports, suggesting a potential structural weakness in the cementum as a cause.

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Area of Science:

  • Dentistry
  • Periodontology
  • Pathology

Background:

  • Cemental tears involve separation of cementum from the tooth root, often causing deep periodontal pockets.
  • Previous literature typically documented cemental tears in only one tooth per individual.

Observation:

  • A unique clinical case presented with cemental tears affecting 14 teeth in a single patient.
  • This presentation of multiple cemental tears in one individual is unprecedented in dental literature.

Findings:

  • The case highlights a significant deviation from the commonly reported incidence of cemental tears.
  • The extensive nature of the tears suggests a potential underlying systemic or localized factor.

Implications:

  • This case necessitates a re-evaluation of the etiology and prevalence of cemental tears.
  • Further research is warranted to explore potential causes, such as inherent structural weaknesses in the cementum.