Hip Pain

Your hip is one of the largest weight-bearing joints in the body.  When it's working properly, it lets you walk, sit, bend and turn without hip joint pain.  To keep it moving smoothly, a complex network of bones, cartilage, muscles, ligaments and tendons must all work in harmony. The hip is a very stable ball-and-socket joint: A ball (femoral head) at the top of the thighbone (femur) fits into a rounded socket or cup-like cavity (acetabulum) in your pelvis. Bands of tissues called ligaments form a capsule connecting the ball to the socket and holding the bones in place. A layer of smooth tissue called cartilage cushions the surface of the bones, helping the ball to rotate easily in the socket. Fluid-filled sacs (bursae) cushion the area where muscles or tendons glide across bone. The capsule surrounding the joint also has a lining (synovium) that secretes a clear liquid called synovial fluid. This fluid lubricates the joint, further reducing friction and making movement easier. hip replacementInjury or disease can damage your hip in several ways, resulting in a broken or deteriorated bone, irritated bursae, or worn cartilage. The most common cause of hip pain is osteoarthritis (OA). Other causes of hip pain include rheumatoid arthritis, osteoporosis, osteonecrosis (death of bone caused by insufficient blood supply), injury, infection, and bone tumors. The Hip HemiCAP® is useful in two types of hip pathologies: Pipkin Fractures and Avascular Necrosis (osteonecrosis).  

Pipkin Fracture

A Pipkin Fracture is a traumatic defect in the femoral head and can be caused the hip dislocating during a car accident for example.  Pipkin Fractures are a result of posterior dislocation of the femoral head and usually result in a piece or fragment breaking off from the femoral head. The fractured fragment can be removed and replaced with the HemiCAP®.

Avascular Necrosis

AVN is Avascular Necrosis, a condition in which poor blood supply to an area of bone leads to the death of that area of bone.  AVN is most often a result of steroid use 40-60%, alcoholism 20%, and 20-40% classified as Idiopathic or unknown origin.  In AVN, the cartilage when exposed may look fine, but is often delaminating or peeling off from the dead bone below.  70-80% of confirmed AVN cases lead to femoral head collapse when untreated.  The hip is the most common site for AVN to occur.  It is observed more frequently in men than in women. There are 30,000 new AVN cases reported each year, and AVN accounts for over 10% of the 1,000,000 total hips performed each year.

  • Quick Facts

    • Little to no activity restrictions making the Arthrosurface® implants an active alternative to hip replacement Total versus HemiCAP®
    • It is custom matched to fit a patient’s joint size and shape
    • Significantly less cartilage and bone is removed than traditional joint replacements
    • The HemiCAP® Implant is placed into the surface of the bone, rather than on top, leaving the natural anatomy of the joint
    • Joint Structures (Ligaments, Tendons, etc.) are preserved, so no bridges are burned for future surgical options
    • Allows you to Stay Active and resume full activity level. Results may vary.
    • Twenty to thirty percent of people who fall suffer moderate to severe injuries such as lacerations, hip fractures, and head traumas
    • Most fractures among older adults are caused by falls.8 The most common are fractures of the spine, hip, forearm, leg, ankle, pelvis, upper arm, and hand
    • There are over 330,000 Hip Replacements performed in the US each year.