Back - Sacroiliac Joint

The sacroiliac joint (SIJ) is a term used to describe the place where the sacrum and the iliac bones join.

  • The sacrum is located at the base of your spine. It is made up of 5 vertebrae, or backbones, that are fused together.
  • The iliac bones are the two large bones that make up your pelvis. The sacrum sits in the middle of the iliac bones.

The main purpose of the joint is to connect the spine and the pelvis. As a result, there is very little movement at the SIJ.

Major reasons for pain around the SIJ include:

  • Muscle tightness
  • Pregnancy: the pelvis widens to prepare for birth, stretching the ligaments. These are strong, flexible tissue that connects bone to bone
  • Different types of arthritis
  • Difference in leg lengths
  • Wearing away of the cartilage (cushion) between the bones
  • Trauma from impact, such as landing hard on buttock

Commonly treated back pain concerns:

  • Sacro-iliac Joint Incompetence

Before your procedure

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