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Related Concept Videos

Sutures of the Skull01:22

Sutures of the Skull

7.9K
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...
7.9K
Structural Joints: Fibrous Joints01:03

Structural Joints: Fibrous Joints

2.5K
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...
2.5K
Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

4.5K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
4.5K
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

2.8K
As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary...
2.8K
Cranial Bones: Superior and Posterior View01:14

Cranial Bones: Superior and Posterior View

3.0K
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
3.0K
Cranial Bones: Lateral View01:27

Cranial Bones: Lateral View

2.8K
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
2.8K

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Related Experiment Video

Updated: Sep 22, 2025

Author Spotlight: Development and Evaluation of a Standardized Rat Model for Calvarial Suture-Bony Composite Defects
04:17

Author Spotlight: Development and Evaluation of a Standardized Rat Model for Calvarial Suture-Bony Composite Defects

Published on: May 10, 2024

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Squamosal Suture Synostosis: An Under-Recognized Phenomenon.

Justin W Beiriger1, Xiao Zhu1, Madeleine K Bruce1

  • 1University of Pittsburgh Medical Center, Pittsburgh, PA, USA.

The Cleft Palate-Craniofacial Journal : Official Publication of the American Cleft Palate-Craniofacial Association
|May 20, 2022
PubMed
Summary
This summary is machine-generated.

Squamosal suture (SQS) synostosis may occur earlier and more frequently in children than previously thought. Many isolated cases are asymptomatic and incidentally discovered, suggesting it

Keywords:
computerized tomographycraniofacial morphologysynostosis

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Endoscopic Septoplasty with Limited Two-line Resection: Minimally Invasive Surgery for Septal Deviation
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Last Updated: Sep 22, 2025

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Author Spotlight: PEGASOS Tissue Clearing Technique to Visualize Bone Remodeling
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Endoscopic Septoplasty with Limited Two-line Resection: Minimally Invasive Surgery for Septal Deviation
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Area of Science:

  • Pediatric Neurosurgery
  • Craniofacial Surgery
  • Developmental Biology

Background:

  • The squamosal suture (SQS) is a poorly understood craniosynostosis site.
  • SQS fusion is traditionally believed to occur late in life.
  • This study investigates earlier SQS fusion in pediatric patients.

Approach:

  • Retrospective review of pediatric craniofacial imaging (CT scans).
  • Analysis of clinical notes and relevant patient data.
  • Identification of patients with SQS synostosis.

Key Points:

  • 47 pediatric patients with SQS synostosis identified.
  • 57% had bilateral SQS synostosis; 32% had isolated SQS.
  • 19% required surgery, all with multi-suture synostosis.
  • 57% diagnosed incidentally; symptomatic cases showed developmental delays and neurological issues.

Conclusions:

  • SQS synostosis may be more common and occur earlier in children.
  • Isolated SQS synostosis is often asymptomatic and incidentally found.
  • Further research is needed to understand SQS synostosis' significance and natural course.