A hip joint spacer mold
A technology for placeholders and hip joints, which is applied in the field of molds for making hip joint placeholders, can solve problems such as inability to change the molding ability, and achieve the effects of multiple operation possibilities, high forming precision, and saving operation time.
Active Publication Date: 2016-12-21
BEIJING AKEC MEDICAL
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Problems solved by technology
[0006] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a hip joint placer mold with simple structure, convenient use, guaranteed dimensional accuracy, and reusability. The problem
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[0020] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0021] Such as figure 1 As shown, the present invention is made up of upper mold part 1 and lower mold assembly 2, and upper mold assembly and lower mold assembly all have a cavity feature 11 and 21 that are symmetrical to each other along the upper and lower mold interface respectively, when upper and lower mold assembly After the parts are fastened together, a closed cavity in the shape of the hemiprosthesis will be formed, and the shape of the cavity is consistent with the hip joint spacer 3, and is used to form the hip joint bone cement spacer 3;
[0022] During the manufacturing process of the spacer, first, bone cement containing antibiotics needs to be injected into the cavities of the upper and lower molds respectively, and after curing, the hip joint spacer 3 is formed. The hip joint spacer 3 is made in a sterile environment during the operation,...
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The invention discloses a mold for a hip joint occupant. The mold is composed of an upper mold assembly and a lower mold assembly. After the upper mold assembly and the lower mold assembly are fastened together, an airtight seal in the shape of a half-hip prosthesis can be formed. Cavity, which is used to form a spacer for the bone cement of the hip joint. The lower mold assembly includes a base and a fastening system. The fastening system can be rotated along the shaft to facilitate unfastening. The upper mold assembly includes a cavity body, positioning pins and grooves. The positioning pins ensure that the upper and lower molds are aligned correctly. Fitting, the groove facilitates the opening of the mould. The beneficial effect of the present invention is that there are positioning pins during the mating process of the upper mold assembly and the lower mold assembly, which facilitates the mating and high fitting accuracy, and does not affect the surface quality of the spacer due to wrong molds; the present invention has The fastening device does not require doctors to press the upper and lower molds with bare hands, and can continuously provide extrusion capacity to ensure the production quality of the spacer; the fastening device of the present invention can rotate around the axis, and can be easily released. The design of the middle groove is convenient for the doctor to open the mold and take out the spacer, saving operation time.
Description
technical field [0001] The present invention relates to a mold used in hip joint replacement in orthopedic surgery, more specifically, to a mold used for making a hip joint spacer. Background technique [0002] Deep infection after artificial hip replacement is a devastating complication. Once such infection occurs, it is a disaster for the patient and a nightmare for the doctor. Through the unremitting efforts of scholars at home and abroad, the treatment of infection has undergone exploration from the first-stage revision to the second-stage revision. The first-stage operation removes the artificial hip joint prosthesis and performs thorough debridement; A second surgery is done after that, when a new prosthesis is inserted. It has been clinically shown that after debridement in the first-stage operation, other objects should be used to occupy the space where the prosthesis is removed, otherwise the soft tissue around the joint will contract, which will cause difficulties...
Claims
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IPC IPC(8): B29C39/26
Inventor 王彩梅
Owner BEIJING AKEC MEDICAL