Support body in expansion fixing whirlbone

Abstract

The invention relates to a support body in an expansion fixing whirlbone, which comprises a support main body and an internal expansion bolt, wherein the support main body is sleeved outside the internal expansion bolt; the top part of the support main body is arc-shaped; the support main body is provided with a radial expansion wing; the expansion wing is composed of a plurality of wing fins; an expansion gap is formed between each wing fin; the internal expansion bolt is provided with an expansion section; after the internal expansion bolt is arranged in the support main body, the expansion wing can be opened by the expansion section; and the support main body is in threaded connection with the internal expansion bolt. According to the invention, the support body is fixed below the whirlbone or is fixed in bone tissues around a femoral neck through the expansion of a partial structure after the support body is planted on a predetermined position below the collapsing position of the whirlbone; the support body disclosed by the invention does not need to make cortical bone on the lower part of a whirlbone greater trochanter as support mechanics basis; therefore, the support body can be relatively short so that a osteotomy space between the greater trochanter and a lesser trochanter is kept in a future total hip replacement without taking out the support body deliberately.

Description

technical field

[0001] The invention relates to a supporting body, in particular to an expansion-fixing femoral head internal supporting body used for treating hip joints and specially used for the depression of the cartilage tissue of the femoral head. Background technique

[0002] In recent years, the number of cases of avascular necrosis of the femoral head has been on the rise. There are many methods for the treatment of avascular necrosis of the femoral head, including medication and surgery, and the indications and curative effects are not the same. Compression surgery, free fibula grafting and artificial total hip replacement. Heart medullary decompression and free fibula transplantation are suitable for stage I and stage II femoral head necrosis, and the long-term follow-up is not very effective, and there is a possibility of further necrosis and collapse of the femoral head; artificial total hip replacement is suitable For patients with advanced osteonecrosis of th...

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