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Sutures of the Skull

Sutures of the Skull

The human skull is composed of several bones that come together to protect the brain and support the structures of the face. The junctions where these bones meet are called sutures.
Sutures are immobile joints between adjacent bones of the skull. The narrow gap between the bones is filled with dense, fibrous connective tissue that unites the bones. The long sutures located between the skull bones are not straight but instead follow irregular, tightly twisting paths. These twisting lines tightly...

Structural Joints: Fibrous Joints

Structural Joints: Fibrous Joints

Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...

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Related Experiment Video

Updated: Jun 4, 2026

The Establishment of Calvarial Suture-Bony Composite Defects in Rats: A Standardized Model for Suture-Regenerative Therapy Investigation

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Published on: May 10, 2024

The mendosal suture.

Ozcan Gayretli¹, Ilke Ali Gurses, Aysin Kale

¹Faculty of Medicine, Department of Anatomy, Istanbul University, Istanbul, Turkey.

British Journal of Neurosurgery

|February 25, 2011

Summary

The mendosal suture, a debated anatomical feature, was found in 18 adult skulls, aiding clinicians in differentiating it from cranial fractures. This study details its occurrence and location.

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Area of Science:

Anatomy
Anthropology
Forensic Science

Background:

The mendosal suture's presence in adults is debated, with variable reports on its closure.
Understanding its prevalence and location is crucial for accurate anatomical interpretation.

Purpose of the Study:

To determine the occurrence of the mendosal suture in adult skulls.
To establish a precise topographic location for the mendosal suture.

Main Methods:

Analysis of 129 dry skulls.
Measurement of mendosal suture morphometrics and the angle (α) between mendosal and lambdoidal sutures.

Main Results:

Mendosal suture identified in 18 specimens (11 bilateral, 7 unilateral).
Suture lengths varied: 10.4-23.8 mm (right), 10.8-31.6 mm (left).
Inter-suture angles measured: 36-68° (right), 32-75° (left).

Conclusions:

The data provides valuable information for clinicians.
Helps avoid misinterpreting the mendosal suture as cranial fractures.