shows an alternative approach to placing said first sealing member 84 in the hip joint of a human patient said alternative approach comprises the steps of creating a hole 82 in the femur bone 7 following a length axis of the collum femur 6 as shown in fig4 a said hole starting from the lateral side of the thigh penetrating the cortex of the femur bone 7 and eventually reaching the cortex of the caput femur 5 from the inside thereof penetrating said cortex and entering into the hip joint after the creation of the hole 82 in the femur bone 7 the first sealing member 84 is inserted into the hip joint through the hole 82 using a surgical instrument 88 adapted therefor as shown in fig4 c fig4 a b c shows the surgical instrument adapted to insert a mould 81 and or a first and second sealing member 84 86 into the hip joint of a human patient through a hole 18 in the pelvic bone 9 or a hole 82 in the femur bone 9 fig4 b shows a section of the surgical instrument 83 85 88 comprising a tube like element for housing of the mould 81 and or said first and second sealing members 84 86 a piston 89 used to transport said mould 81 and or first and second sealing members 84 86 into the hip joint of a human patient is also shown fig4 c shows a surgical instrument 83 85 88 adapted to insert a mould 81 and or a first and second sealing member.