Related Experiment Video
Updated: Jan 24, 2026
04:19
The Establishment of a Murine Mandibular Molar Extraction Socket Healing Model
Published on: January 13, 2023
5.5K
Three-dimensional image analysis of developing mandibular third molars apices for age estimation: A study using CBCT
Muhammad Khan Asif1, Phrabhakaran Nambiar2, Norliza Ibrahim1
1Department of Oral & Maxillofacial Clinical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
Legal Medicine (Tokyo, Japan)
|June 4, 2019
Summary
Forensic age estimation is enhanced by 3D imaging. Analyzing mandibular third molar apex surface area provides a reliable method for determining age, with high accuracy in validation studies.
Area of Science:
- Forensic Science
- Anthropology
- Radiology
Background:
- Three-dimensional (3D) imaging techniques have significantly advanced forensic science investigations.
- Accurate age estimation is crucial in legal and anthropological contexts.
Purpose of the Study:
- To develop a regression equation for age estimation using the surface area of developing mandibular third molar apices.
- To evaluate the influence of ethnicity, gender, and root development status on the age estimation model.
Main Methods:
- Utilized 128 training and 55 validation samples of mandibular third molars from CBCT scans.
- Performed 3D image modeling and surface area analysis using Mimics and 3-Matics software.
- Employed multiple linear regression analysis with chronological age as the dependent variable.
Main Results:
- A strong inverse correlation (r=0.95) was found between chronological age and predictor variables.
- The derived model explained 89.6% of the variation in age.
- Achieved a Mean Absolute Error (MAE) of 0.8223 on the validation sample.
Conclusions:
- 3D surface area analysis of mandibular third molar apices is a dependable method for forensic age estimation.
- The developed regression equation demonstrates high accuracy and reliability.
More Related Videos
Related Concept Videos
01:12Statistical Software for Data Analysis and Clinical Trials
1.4K
Statistical software is pivotal in data analysis and clinical trials by providing tools to analyze data, draw conclusions, and make predictions. These software packages range from simple data management applications to complex analytical platforms, supporting various statistical tests, models, and simulation techniques. Their significance lies in their ability to handle vast amounts of data with precision and efficiency, enabling researchers to validate hypotheses, identify trends, and make...
1.4K
03:40Dimensional Analysis
60.5K
Dimensional analysis, also known as the factor label method, is a versatile approach for mathematical operations. The main principle behind this approach is: the units of quantities must be subjected to the same mathematical operations as their associated numbers. This method can be applied to computations ranging from simple unit conversions to more complex and multi-step calculations involving several different quantities and their units.
Conversion Factors and Dimensional Analysis
The unit...
Conversion Factors and Dimensional Analysis
The unit...
60.5K
01:27Dimensional Analysis
653
Dimensional analysis is a valuable technique in fluid mechanics for simplifying complex problems by reducing them into dimensionless groups. These groups capture the essential relationships between the variables involved, allowing researchers and engineers to analyze fluid flow without dealing with each variable individually. This approach reduces the number of independent variables, allowing for easier analysis and better understanding of physical phenomena.
In fluid mechanics, dimensional...
In fluid mechanics, dimensional...
653
01:23Dimensional Analysis
2.1K
Dimensional analysis is a powerful tool that is used in physics and engineering to understand and predict the behavior of physical systems. The basic idea behind dimensional analysis is to express physical quantities in terms of fundamental dimensions such as the mass, length, and time. Derived dimensions like the velocity, acceleration, and force are derived from the combinations of these fundamental dimensions.
Dimensional analysis allows us to analyze and compare physical quantities on a...
Dimensional analysis allows us to analyze and compare physical quantities on a...
2.1K
02:19Dimensional Analysis
23.6K
The concept of dimension is important because every mathematical equation linking physical quantities must be dimensionally consistent, implying that mathematical equations must meet the following two rules. The first rule is that, in an equation, the expressions on each side of the equal sign must have the same dimensions. This is fairly intuitive since we can only add or subtract quantities of the same type (dimension). The second rule states that, in an equation, the arguments of any of the...
23.6K
01:54Molar Mass
86.3K
The identity of a substance is defined not only by the types of atoms or ions it contains but by the quantity of each type of atom or ion. For example, water, H2O, and hydrogen peroxide, H2O2, are alike in that their respective molecules are composed of hydrogen and oxygen atoms. However, because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties.
86.3K