Movable platform unicondylar replacement medullary cavity rod insertion 3D positioning guide plate and manufacturing method thereof

A technology of unicondylar replacement and movable platform, which is used in fixator, medical science, surgery, etc., can solve the problems of difficult placement, large subjective error, patient error, etc., so as to improve the accuracy of surgery and improve the accuracy of positioning. Effect

Pending Publication Date: 2020-04-17
XUANWU HOSPITAL OF CAPITAL UNIV OF MEDICAL SCI
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Problems solved by technology

This positioning has the following disadvantages: first, the affected limb is abducted 30 degrees during the operation, which is difficult to place accurately during the operation, and the subjective error is relatively large when touching the anterior superior iliac spine outside the body; second, the femoral valgus in the crowd Angle diffe...

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  • Movable platform unicondylar replacement medullary cavity rod insertion 3D positioning guide plate and manufacturing method thereof
  • Movable platform unicondylar replacement medullary cavity rod insertion 3D positioning guide plate and manufacturing method thereof
  • Movable platform unicondylar replacement medullary cavity rod insertion 3D positioning guide plate and manufacturing method thereof

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Embodiment Construction

[0014] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0015] It should be noted that the terms "first" and "second" in the claims and description of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0016] On the basis of the existing axial line of force method, the researchers of the present invention refer to the concept of the axial line of force of the femur, and use computer software to reconstruct the CT image of the femur in 3D. According to the personalized design for different patients, a personalized unicondylar knee replacement medullary cavity rod is inserted into the 3D positioning guide.

[0017] f...

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Abstract

The invention discloses a movable platform unicondylar replacement medullary cavity rod insertion 3D positioning guide plate and a manufacturing method thereof, which belong to the technical field ofmedical instruments. The movable platform unicondylar replacement medullary cavity rod insertion 3D positioning guide plate comprises a 3D upper surface, a plurality of guide plate fixing holes, an intramedullary positioning rod guide-in hole, an intramedullary positioning rod screw-in point corresponding to the intramedullary positioning rod guide-in hole is arranged between femoral condyles of the patient, and an included angle between the central axis of the intramedullary positioning rod guide-in hole and a femoral mechanical axis determined by CT scanning of the femur on the coronal position is 7 degrees. According to the 3D positioning guide plate and the manufacturing method thereof, the accuracy of femoral intramedullary positioning is improved, the accuracy of an operation is improved, and the service life of a prosthesis is prolonged.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, in particular to a unicondyle replacement medullary cavity rod inserted into a 3D positioning guide plate on a movable platform and a manufacturing method thereof. Background technique [0002] Unicompartmental knee arthroplasty (UKA) is more and more used in the treatment of unicompartmental osteoarthritis because of its advantages of less trauma, quick recovery and good postoperative joint function recovery, and the results are satisfactory. short-term clinical effects. However, the long-term survival rate of UKA is not as good as that of total knee arthroplasty (total knee arthroplasty, TKA). Studies have found that many early UKA revisions are associated with poor alignment of the prosthesis. [0003] At present, the positioning of the femoral prosthesis line is determined by the intramedullary positioning of the femur. The intramedullary positioning depends on the intersection of...

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Application Information

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IPC IPC(8): A61B17/90
CPCA61B17/88A61B17/90
Inventor 冯明利程静波
Owner XUANWU HOSPITAL OF CAPITAL UNIV OF MEDICAL SCI
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