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Related Concept Videos

Bone Structure01:55

Bone Structure

Within the skeletal system, the structure of a bone, or osseous tissue, can be exemplified in a long bone, like the femur, where there are two types of osseous tissue: cortical and cancellous.
Spongy Bone01:09

Spongy Bone

All bones comprise an outer layer of compact bone, and an interior made up of spongy bone tissue, also called cancellous or trabecular bone. In long bones, spongy bone tissue is mainly found in the interior of the epiphyses (broad ends of the bone).
Spongy bone is more porous, and less dense compared to compact bone. It is composed of concentric lamellae that are arranged irregularly to form the trabecular network. In some bones, the spaces between trabeculae contain red marrow, where...
Compact Bone01:27

Compact Bone

Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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...
Gross Anatomy of Bone01:17

Gross Anatomy of Bone

The two main features of a long bone are the diaphysis and the epiphysis.
The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The walls of the diaphysis are composed of dense and hard compact bone made of numerous osteons — the functional unit of the compact bone. The hollow region in the diaphysis is called the medullary cavity, which harbors the bone marrow. In infants and children, this marrow cavity is filled with red marrow, whereas in adults, it...
Bone Formation by Intramembranous Ossification01:29

Bone Formation by Intramembranous Ossification

Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...

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Updated: Jun 6, 2026

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model
06:59

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

Published on: September 8, 2023

Cross-Sectional Study on the Relationship Between Jawbone Types and Trabecular Bone Structures.

Honghong Liu, Yingying Zhang, Zongcheng Yang

    The Journal of Oral Implantology
    |June 4, 2026
    PubMed
    Summary
    This summary is machine-generated.

    This study reveals significant differences in jawbone structure across different bone types, impacting osseointegrated implant success. Understanding these bone types is crucial for selecting optimal implant sites and predicting outcomes.

    Keywords:
    biopsybone densityhistomorphometricjawbone typetrabecular bone

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    Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology

    Published on: August 22, 2022

    Area of Science:

    • Oral and Maxillofacial Surgery
    • Biomaterials Science
    • Dental Implantology

    Background:

    • Jawbone quality varies significantly among patients, influencing dental implant success.
    • Trabecular bone structure is a critical determinant of implant stability and osseointegration.
    • The Norton and Gamble classification provides a framework for categorizing jawbone types.

    Purpose of the Study:

    • To investigate the relationship between different jawbone types (Norton and Gamble classification) and their underlying trabecular bone structures.
    • To analyze key histomorphometric parameters of trabecular bone in relation to jawbone types.
    • To establish correlations between bone type and trabecular bone characteristics for improved implant site selection.

    Main Methods:

    • A cohort of 33 partially edentulous patients received 38 osseointegrated implants.
    • Jawbone recipient sites were assessed using Hounsfield units and classified into Types I, II/III, and IV.
    • Histomorphometric analysis quantified bone volume fraction (BV/TV), trabecular thickness (Tb. Th), trabecular number, and trabecular separation.

    Main Results:

    • Significant differences in BV/TV were observed between Type I and Type IV bone (p < .001).
    • Type I bone showed statistically significant differences in BV/TV, trabecular number, and trabecular separation compared to Type II/III bone (p < .01).
    • Tb. Th was the only significant differentiator between Type II/III and Type IV bone (p < .01).

    Conclusions:

    • Jawbone type is a significant factor influencing trabecular bone structure.
    • Understanding the relationship between bone types and trabecular parameters aids in predicting osseointegrated implant outcomes.
    • Careful selection of implant sites based on bone type is essential for successful dental implantology.