Orthopedics and trauma surgery
Chief Physician

Partial Hip Replacement

Professor MD Thomas Gösling

Chief Physician

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Partial Hip Replacement

Partial hip replacement, or hemiarthroplasty, is surgery for replacing the fermoral head degenerated as result of injury and, rarely, wearing out of arthritis. It is also often called half hip replacement as only the one part of the joint is replaced.

Indications for Half Hip Replacement

Partial hip replacement is more demanded in trauma surgery rather than for arthritis treatment. The reason that arthritis rarely affect a half of the joint only and in the most cases total hip surgery is required for arthritis. Your doctor may consider on partial hip replacement based on the following reasons:

  • Severe fracture of femoral neck
  • Traumatic arthritis developed from injury
  • Developmental dysplasia
  • Avascular necrosis (dead femoral head)
  • Perthes disease in children
  • Congenital hip displacement

Types of Partial Hip Replacement

  • Unipolar hemiarthroplasty. The head and neck of the femoral bone are replaced.
  • Bipolar hemiarthroplasty. Replacing the femoral head and neck together with acetabular cup on the other side.
  • Resurfacing hemiarthroplasty. Only the surface of femoral cup is replaced.

The Materials for Hip Implants

Partial Hip Replacement

The hip prosthesis devices are performed as a combination of different materials. The bones are replaced with hard materials as metal or porcelain, when plastic spacers and polyethylene imitate cartilage tissues. The most common are implants as following:

  • Metal and Plastic. Common combination when artificial ball and socket are made of metal with spacers of plastic.
  • Metal on Metal. This type of implants have no plastic components but it is become less popular as wearing out it release metal micro particles into the blood.
  • Ceramic on Ceramic. Those are durable and scratch resistant implants.
  • Metal with Highly cross Linked Polyethylene. More durable new kind of spacers makes this type of implants growing popular.

Based on type of fixation implants can be divided for cemented and uncemented. The last ones are recommended for younger and more active people as using cementless technology implies the bones growing where the surfaces are contacts.

Partial Hip Replacement Surgery

The surgery for half hip replacement is normally performed under general anesthesia and takes 1-1.5 hours. It is possible to mark out the following stages of the process:

  • Entering the joint. There are a few possible approaches to the joint: frontal, side and back. The surgeon made an incision and moves away tendons and muscles to expose operational area including femoral head and acetabulum.
  • Femoral head removal. The surgeon cuts a femoral head together with the neck.
  • Preparation of channels. After the head removal the channels made in femoral bone for inserting of the stem.
  • Implant placing. The femoral stem is inserted and either cemented or just “press-fitted” to the bone and, then, a ball is placed on the stem.
  • Joint assembling. The joint is assembled, wound is closed and stitched.

Recovery after Surgery

After surgery you should stay in a hospital at least 3-4 day. Normally, during that time you have pain reducing therapy and try doing simple kinds of activities as getting out of your bed independently, enjoying food, using bathroom, walking in the hall with supporting devices and starting doing exercises recommended by your physician.

After discharge you keep getting physiotherapy and increase your activities. You will need special regime avoiding everything that makes you unstable. You will need supporting devices for a few months. You may experience swelling and treat it with compresses.

Step by step you should return to normal life and resume your habitual activities. You may be advised a certain sleeping position for time being and recommended a diet.

Have an Advice of Orthopedic and Fracture Specialist

If you experience hip problems but not sure what kind of treatment is preferable, please have professional support of the best hip surgery specialists in Germany. Clinic of Braunschweig offers a whole range of treatments of hip disorders. What is better: partial hip replacement or total hip replacement? What kind of implants to choose? You will find answers for all of your questions if contact us online.

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