Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Hydration of Cement

Hydration of Cement

Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...

Soundness of Cement

Soundness of Cement

The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...

Portland Cement

Portland Cement

Portland cement is the essential binding ingredient in concrete, made from finely ground materials including lime, iron, silica, and alumina. Lime is derived primarily from limestone, marble, marl, seashells, and clays, which also supply iron and alumina, while silica is sourced from sand, chalk, and bauxite. Contemporary manufacturing of Portland cement is a significant source of carbon dioxide emissions, prompting research into reducing its content in concrete through alternative...

Fineness of Cement

Fineness of Cement

The fineness of cement directly influences the rate of hydration, as the hydration begins at the surface of the cement particles. In addition to hydration, the fineness of cement is vital for various properties of concrete including workability, gypsum requirement, and long-term behavior. The fineness of cement is represented in terms of the specific surface of cement which is typically measured in square meters per kilogram, with several methods available for this determination.
Direct...

Strength of Cement

Strength of Cement

Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...

Types of Cement I

Types of Cement I

Portland cement comes in several types, each with distinct properties and applications based on their chemical composition and hydration characteristics:
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Unveiling conserved and breed-specific RNA expression signatures underlying hepatic homoeostasis across genetically diverse chicken breeds.

British poultry science·2026

Same author

Laser-Assisted Gingivectomy in Amlodipine-Induced Gingival Enlargement: A Case Report.

Cureus·2025

Same author

Experimental arrangement to study the impact of atmospheric turbulence on user-defined beams.

The Review of scientific instruments·2025

Same author

Professor Dr. Bangalore Krishnaswamy Venkataraman (1923-2018): An Icon and Pioneer of Oral Medicine in India.

Cureus·2024

Same author

A Three-Dimensional Assessment of a Type I Shallow Palatogingival Groove by Cone Beam Computed Tomography: A Case Report.

Cureus·2024

Same author

Panoramic Radiograph and CBCT in Unilateral Mandibular Condylar Hyperplasia-A Case Report.

The Indian journal of radiology & imaging·2022

Search research articles

Related Experiment Video

Updated: Jan 29, 2026

Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way

Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way

Published on: November 21, 2017

Age estimation by cemental annulation rings.

N Mohan¹, Sabitha Gokulraj¹, Merlyn Thomas¹

¹Department of Oral Medicine and Radiology, Vinayaka Missions Sankarachariyar Dental College, Salem, Tamil Nadu, India.

Journal of Forensic Dental Sciences

|February 13, 2019

Summary

This summary is machine-generated.

Dental cementum annulation, the counting of incremental lines in tooth cementum, can accurately estimate a person's age. This forensic dentistry technique offers a reliable method for age determination when other identification means are unavailable.

Keywords:

Age estimation forensic odontology tooth cementum annulation

More Related Videos

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans

Published on: November 26, 2017

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

Published on: November 25, 2011

Related Experiment Videos

Last Updated: Jan 29, 2026

Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way

Detecting the Water-soluble Chloride Distribution of Cement Paste in a High-precision Way

Published on: November 21, 2017

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans

Methods to Study Changes in Inherent Protein Aggregation with Age in Caenorhabditis elegans

Published on: November 26, 2017

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering

Published on: November 25, 2011

Area of Science:

Forensic Odontology
Anthropology

Background:

Tooth identification is crucial in forensic science, especially when other remains are compromised.
Dental evidence, specifically cementum annulation, aids in estimating individual age.
The number of alternating light and dark bands in cementum correlates with patient age.

Purpose of the Study:

To determine individual age using tooth cementum annulation.
To evaluate the efficacy of cementum annulation for age estimation in forensic dentistry.

Main Methods:

Twenty extracted teeth were collected with recorded clinical details (age, sex, chief complaint).
Teeth were preserved, washed, sectioned, and observed under a light microscope (10× objective).
Photomicrographs were taken for counting cementum lines; the observer was blinded to the actual patient age.

Main Results:

A statistically significant correlation was found between actual age and age estimated via cementum annulation.
The study demonstrated the reliability of the cementum annulation method for age determination.

Conclusions:

Incremental lines in tooth cementum are a viable indicator for age estimation in forensic dentistry.
Cementum annulation provides a valuable tool for identifying individuals in forensic investigations.