Prospective Randomised Study of a New an Uncemented Stem.

Prospective Randomised Study of a New Anteverted Uncemented Stem. Randomised Study Between the SP-CL and the Corail Stem With the Use of a Delta Cup.

Patients will be randomised to either operation with a Corail stem or a SP-CL stem. The groups are examined with RSA, conventional x-rays, PROM-data and DXA. First evaluation will be done at two years.

Inclusion Criteria:

• Primary osteoartritis Secondary osteoartritis

Exclusion Criteria:

• Ongoing treatment with corticoid steroids, Active cancer disease, previously known osteoporosis or osteomalacia, inflammatory arthritis, unsuitable anatomy, difficulties to speak or understand the Swedish language.