Original M.E. Müller® Acetabular Reinforcement Ring
The Acetabular Roof Reinforcement Ring was designed by Prof. Maurice E. Müller. Reinforcement of the acetabulum using an acetabular roof reinforcement
ring is indicated in total hip replacement in cases of osteoporosis, rheumatoid arthritis, acetabular roof cysts, simultaneous bone grafting, small dysplastic
hips, after arthrodeses and in socket revision.
An acetabular roof reinforcement ring is also recommended in combination with polyethylene cups with low wall thickness.
After the preparation of the acetabulum, an acetabular roof reinforcement ring with a diameter of 4 mm smaller than the last reamer is normally used. The implant is wedged into the acetabulum with the metal impactor. The ring is positioned correctly if its lateral rim lies on the border of the acetabulum. It is imperative that the area of the screw holes and the lower border of the ring should have sufficient bone contact.