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Related Concept Videos

Classification of Bones01:18

Classification of Bones

The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The long...
Bones of the Lower Limb: Tibia and Fibula01:10

Bones of the Lower Limb: Tibia and Fibula

The tibia is the main weight-bearing bone of the lower leg. It is larger than the fibula with which it is paired. The tibia is also the second longest bone in the body and is located right below the skin. The proximal end of the tibia forms the medial and the lateral condyle, which articulates with the condyles of the femur to form the knee joint. Between the articulating surfaces is the irregular elevated area known as the intercondylar eminence that serves as the inferior attachment point for...
Classification of Connective Tissues01:30

Classification of Connective Tissues

The connective tissues have different properties and functions in the human body. They are broadly categorized into proper, supporting, or fluid connective tissues.
Connective Tissue Proper
Connective tissue proper is the most abundant class of connective tissues. As its name implies, it predominantly connects different tissues in the body. Depending on the cell types, ground substance, viscosity, and fiber types in the ECM, connective tissue proper is further categorized into loose and dense.
Cellular Injury II: Classification01:21

Cellular Injury II: Classification

Cellular injury is any process that disrupts a cell’s ability to maintain homeostasis, leading to structural or functional changes. It is broadly classified based on etiology (cause) and mechanism of damage.Classification by EtiologyCellular injury may result from several causes. Hypoxic injury happens due to reduced oxygen delivery, most commonly from inadequate blood supply, such as arterial obstruction; for example, coronary artery thrombosis can cause myocardial infarction. Chemical injury...

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Related Experiment Video

Updated: Jun 24, 2026

A Simple Critical-sized Femoral Defect Model in Mice
09:41

A Simple Critical-sized Femoral Defect Model in Mice

Published on: March 15, 2015

New classification and score for tibial hemimelia.

Michael Weber1

  • 1Center for Limb Reconstruction and Limb Lengthening, University of RWTH Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany, mweber@ukaachen.de.

Journal of Children'S Orthopaedics
|March 25, 2009
PubMed
Summary

A new classification and score system for tibial malformations offers precise diagnosis and therapeutic relevance. This system improves upon previous methods by including the entire limb and functional outcomes for better clinical comparison.

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Area of Science:

  • Orthopedics
  • Developmental Biology
  • Medical Imaging

Background:

  • Existing classifications for tibial malformations lack clinical practicality and precision.
  • Previous systems often rely solely on X-ray diagnosis and fail to encompass all malformation types or functional aspects.

Purpose of the Study:

  • To introduce a novel, comprehensive classification and scoring system for tibial malformations.
  • To address the limitations of prior classifications by incorporating advanced diagnostic tools and a broader scope of anatomical and functional assessment.

Main Methods:

  • Developed a classification system categorizing tibial malformations into seven main groups, with five further divided into subgroups.
  • Integrated assessment of the entire limb (hip to foot) and introduced a five-class system for additional defects and function.
  • Emphasized the role of the cartilaginous anlage of the tibia in the classification.

Main Results:

  • The new system was evaluated on 95 affected limbs, demonstrating improved precision in defect detection and correct pathological-anatomical terminology.
  • Type VII malformations were most prevalent (61%), followed by Type III (15%).
  • The classification successfully incorporates the entire limb and functional outcomes, facilitating therapeutic considerations.

Conclusions:

  • The new classification and score system provide a simple, therapeutically relevant, and comprehensive method for categorizing tibial malformations.
  • It enables robust scientific comparison across different studies and authors.
  • For routine clinical practice, the tibial-specific classification is recommended.