Individual orthopedics department positioning sheet based on medical images

Abstract

The invention discloses an individual orthopedics department positioning sheet based on the medical image three-dimensional reconstruction and computerized design technology. The individual orthopedics department positioning sheet is manufactured based on 3D printing or other machining methods and is used for knee prosthesis. The positions of key positioning holes and cutting faces in knee prosthesis are particularly and accurately determined. Firstly, a skeleton model is reconstructed based on medical images; preoperative planning is carried out on the reconstructed model so as to determine important parameters of a lower extremity force line, a thighbone rotating shaft, an osteotomy reference point and the like and simulate osteotomies and prosthesis imbedding; by means of the results, the positioning sheet (in a single positioning type or a composite type) is determined and designed; a doctor logs into a data management module to query data. The single positioning type positioning sheet is formed by thickening and punching on an extraction face of the reconstructed model; the composite positioning sheet is a combination of the single positioning type positioning sheet and an osteotomy device, and the osteotomy positioning function is achieved. By means of the positioning sheet designed through an auxiliary system, the lower limb force line can be accurately reconstructed, and accurate osteotomies can be achieved; an informatization management method is provided by the data management module for operations, and convenience is brought to data storage and querying.

Description

technical field [0001] The present invention relates to the technical field of medical devices, in particular to a personalized orthopedic positioning piece for knee joint replacement surgery based on medical image three-dimensional reconstruction technology and computer-aided design technology, using 3D printing or other processing methods, and a positioning piece auxiliary design system . Background technique [0002] With the aging of society, osteoarthritis has become one of the most common bone and joint diseases in humans. The third National Health and Nutrition Examination Survey (NHANES) estimates that about one-third of people aged 60 and over suffer from primary osteoarthritis. For surgeons, this is undoubtedly a growing burden. At the same time, in a certain sense, knee replacement has high requirements for surgical skills and postoperative rehabilitation of patients, and it is still a major medical problem. At present, total knee replacement (Total Knee Replac...

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Problems solved by technology

[0005] However, navigation technology also has some recognized disadvantages: ①Input of bony landmark points is required during the operation, which prolongs the operation time; ②The positioning of bony landmark points is still based on naked eye judgment and needs to rely on the experience of doctors ;③Navigation technology is to measure the force line of the lower limbs under the condition of non-weight bearing, and the result is different from that under weight bearing;④The patella is in a state of complete dislocation when the navigation technology measures, which does not help the osteotomy of the patella;⑤The navigation system itself has Instability, and the cost of surgery is high, and it is still difficult to promote widely in clinical practice

However, it cannot be denied that the robot-assisted surgery system still has some limitations: ①The cost of equipment is high, and operations such as installation, commissioning, and disinfection are relatively complicated; Accept fully automatic surgery; ③ There will be some problems with the anti-interference ability and stability of electronic instruments, once an emergency occurs, the consequences will be unimaginable; ④ The flexibility and accuracy of surgical operations still need to be improved; ⑤ Current surgical robots The speed of automatic bone cutting is very slow, prolonging the operation time and increasing the blood loss of patients

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