Personalized articular bone cement spacer mold and preparation method

Abstract

The invention discloses a personalized articular bone cement spacer mold and a preparation method. According to the CT, X-ray or MR medical image data of the joint of a specific patient and the jointpart of the long bone part where a handle body of a bone cement spacer is located, the anatomy image features and parameters, the specific size, shape and length are designed, and an articular bone cement spacer three-dimensional model and a mold of a female mold forming cavity part of the mold matched with the outer surface of the articular bone cement spacer three-dimensional model are designed.The mold comprises a personalized articular bone cement spacer forming cavity, a bone cement injecting hole and a plug cover, half-round positioning registration points, a fastening threaded hole ora rapid locking device and a pull-out handle. With the personalized articular bone cement spacer mold and the preparation method, the defects that for the existing commercial bone cement spacer mold,only the specific models can be selected, the size of a specific patient can not be well adapted, and a bone cement spacer formed by manual kneading of a medical worker by virtue of experience is notaccurate in shape and size, and is weak in strength, are overcome, the service life of the bone cement spacer is effectively prolonged, and the success rate of the surgery is improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a personalized joint bone cement spacer mold and a preparation method. Background technique [0002] Infection around the spacer after arthroplasty is a catastrophic complication, the incidence rate is 1% to 2% after knee arthroplasty, but its consequences are serious. At present, the treatment of infection after artificial joint replacement is based on thorough debridement and removal of the prosthesis + implantation of antibiotic bone cement spacer (spacer) + two-stage joint revision as the standard treatment process. During the infection control period, the use of joint spacers can not only maintain joint tension, but also prevent soft tissue contracture around the joint from affecting the effect of the second-stage revision surgery. It can also locally supply high-concentration antibiotics to control infection. [0003] At present, bone cement spacers are divided into ...

AI Technical Summary

Problems solved by technology

However, this kind of spacer bone cement model manually kneaded by experience has high requirements for medical personnel, and it is not easy to accurately control the shape and size of the required spacer bone cement model, which seriously affects the relationship between the patient's spacer bone cement model and the joint. and the degree of fit and matching of the medullary cavity, which reduces the surgical effect and increases the risk of surgery; in addition, the hand-kneaded spacer bone cement model takes a long time, which affects the operation process; in addition, the hand-kneaded spacer bone cement model Pores often remain in the spacer, which affects the strength of the spacer bone cement model and shortens the service life of the pelvic bone cement model

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