The primary goal of Total Hip Replacement (THR) surgery in the treatment of hip osteoarthritis is to reduce pain and restore hip function in order to increase patient mobility and quality of life. Two different cement fixation methods are used in order to insert THR implants. This will be done before and after surgery in 2 groups randomized to either of 2 cement fixation methods. Gait analysis preoperative and 2 year after surgery.

The primary goal of Total Hip Replacement (THR) surgery in the treatment of hip osteoarthritis is to reduce pain and restore hip function in order to increase patient mobility and quality of life. Patients with radiological signs of osteoarthritis of the hip, hip pain and functional disability may be treated with insertion of a THA.

Two different fixation methods are used in order to insert THR implants. Cemented fixation using bone cement, polymethyl methacrylate (PMMA) is the most commonly used fixation method in Sweden. A new bone cement, Refobacin®, already marketed in Germany is planned to be introduced in Sweden in late 2018.

The hospital is also equipped with a modern gait laboratory were the functional gait performance can be evaluated. This will be done before and after surgery in 2 groups randomized to either of 2 cement fixation methods. The subjects will undergo gait analysis befor and 2 year after surgery.

Inclusion Criteria:

• hip arthritis

Exclusion Criteria:

• no hip arthritis

Plan to make individual participant data (IPD) after publication

After publication

After publication

Preop Postop