sutures

Examples of sutures in the following topics:

• Sutures

  • A suture is a type of fibrous joint (or synarthrosis) that only occurs in the skull (or cranium).
  • A suture is a type of fibrous joint (or synarthrosis) that only occurs in the skull.
  • Most sutures are named for the bones that they articulate.
  • Frontal suture or metopic suture: Located between the two frontal bones, prior to the fusion of the two into a single bone.
  • Calculate the age of an individual skeleton based on the cranial sutures

• Sutures

  • Sutures primarily visible from the side of the skull (norma lateralis) include:
  • Frontal suture / Metopic suture: between the two frontal bones, prior to the fusion of the two into a single bone
  • Late in life, the sagittal, coronal, and lambdoid sutures of the skull will begin to ossify and fuse, causing the suture line to gradually disappear.
  • Lateral view of skull showing the location of some of the cranial sutures.
  • Cranial sutures are depicted with the frontal suture highlighted in blue.

• Cranial Bones

  • The occipital bone borders the parietal bones through the heavily serrated lambdoidal suture, and also the temporal bones through occipitomastoid suture.
  • The two bones articulate to form the sagittal suture.
  • In the front, the parietal bones form the coronal suture with the frontal bone, and in the rear, the lambdoid suture is formed by the occipital bone.
  • Finally, the squamosal suture separates the parietal and temporal bones.
  • The frontal bone borders two other neurocranial bones—the parietal bones through the coronal sutures and the sphenoid bone through the sphenofrontal suture.

• Classification of Joints on the Basis of Structure and Function

  • There are three types of fibrous joints: sutures, syndesmoses, and gomphoses.
  • Sutures are found only in the skull and possess short fibers of connective tissue that hold the skull bones tightly in place .
  • Syndesmoses are joints in which the bones are connected by a band of connective tissue, allowing for more movement than in a suture.
  • Fibrous joints classified as synarthroses, or immovable, include: sutures, gomphoses, and synchondroses

• Structural Classification of Joints

  • Sutures are the types of joint found in the cranium (skull).
  • The nature of cranial sutures allows for some movement in the fetus.
  • (a) Sutures (b) Syndesmosis  (c) Gomphosis.

• General Features and Functions of the Skull

  • The skull is formed of several bones which, with the exception of the mandible, are joined together by sutures—synarthrodial (immovable) joints.
  • The neurocranium is formed from the occipital bone, two temporal bones, two parietal bones, the sphenoid, ethmoid and frontal bones; they are all joined together with sutures.

• Fontanels

  • The ossification of the bones of the skull causes the fontanelles to close over a period of 18 to 24 months; they eventually form the sutures of the neurocranium.
  • These are joined by fibrous sutures that allow movement that facilitates childbirth and brain growth.

• Fibrous Joints

  • The skull bones are connected by fibrous joints called sutures.
  • Except for the mandible, all are joined together by sutures, semi-rigid articulations formed by bony ossification.

• Episiotomy

  • The incision, which can be midline or at an angle from the posterior end of the vulva, is performed under local anesthetic (pudendal anesthesia), and is sutured closed after delivery.
  • The cut is repaired with stitches (sutures).

• Functional Classification of Joints

  • This category includes fibrous joints such as suture joints (found in the cranium) and gomphosis joints (found between teeth and sockets of the maxilla and mandible).