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This gives the bones of a synovial joint the ability to move smoothly against each other, allowing for increased joint mobility. At synovial joints, the articular surfaces of bones are covered with smooth articular cartilage. This fluid-filled space is the site at which the articulating surfaces of the bones contact each other. A key structural characteristic for a synovial joint that is not seen at fibrous or cartilaginous joints is the presence of a joint cavity. Synovial joints are the most common type of joint in the body ( Figure 9.4.1).

Clinical Relevance: Pelvic FracturesBy the end of this section, you will be able to:ĭescribe the characteristic features for synovial joints and give examples Circumferential pressure is applied by the binder at the level of the greater trochanters – an important anatomical landmark. As a result, major trauma patients are assumed to have a pelvic fracture until proven otherwise and a ‘ pelvic binder’ is used to stabilise the pelvis and minimise further bleeding. In the context of a high energy major trauma patient, the pelvis can be a major source of bleeding due to fracture. Vascular injury can result in life threatening haemorrhage. In particular, the bladder and urethra are at high risk of damage. Higher energy injuries can be associated with soft tissue and vascular injury.These can be ‘unstable’ injuries and may require urgent surgery.These result in more extensive fractures which may include the acetabulum and sacroiliac joint. For example, after a high speed road traffic accident.High energy injuries with direct or transmitted trauma:.