The invention relates to a method and an anti-luxation device ( 20 ) for preventing dislocation of arthroplasty implants such as in hips. The invention prevents dislocation by providing a restraining force on the implant under all movements of the joint. The device provides a restraining force opposing movements typically leading to positions where dislocations are likely to occur, and an extra securing force for holding the implant head ( 7 ) in the cup ( 2 ) when the joint is at positions where dislocations are likely to occur. The invention further provides a method for mounting the device on an arthroplasty implant.
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