Locking metal bone fracture plate device commonly used for cortical bone and cancellous bone

Abstract

The invention discloses a locking metal bone fracture plate device commonly used for cortical bone and cancellous bone. The device is a fracture setting medical instrument and can be used for fixing a skeleton of different bone substances at a fracture position. The device comprises a locking metal bone fracture plate, a locking coarse-pitch thread bone screw and a locking fine-pitch thread bone screw. Same taper screw threads are arranged at the rear ends of the two locking bone screws, coarse-pitch threads and fine-pitch threads are respectively arranged on the surface of a cylinder, and the locking metal bone fracture plate is provided with more than two tapered screw thread locking holes which are matched with the taper screw threads of the locking bone screws. The coarse-pitch threads are single threads or multiple threads, the fine-pitch threads and the taper screw threads are multiple threads, and the lead of the coarse-pitch threads, the lead of the fine-pitch threads and the lead of the taper screw threads are the same. In the fracture setting process, the locking coarse-pitch thread bone screw is screwed into one tapered screw thread hole corresponding to the cancellous bone at the fracture position, the locking fine-pitch thread bone screw is screwed into one tapered screw thread hole corresponding to the cortical bone, and therefore the holding force of skeletons of different substances at the two ends of a fracture line is enhanced.

Description

technical field [0001] The invention relates to the field of orthopedic medical instruments. Background technique [0002] The use of locking metal plate devices to set bones in fractured patients is a common medical treatment. Usually the locking metal bone plate device is composed of a locking metal bone plate and a locking bone screw. The coarse thread of the bone is called a locking coarse thread bone screw, and the head of the locking bone screw is provided with a tapered thread. Application (patent) number: 200610154959.6 discloses a locking elastic bone plate for orthopedic implants, which includes a bone plate with locking holes on the bone plate, which is characterized in that the locking hole on the bone plate is a tapered threaded hole, and is used in conjunction with it The screw is a taper screw, and the two are threaded through a taper hole. Application number: CN200610040293.1 discloses a locking bone screw, the structure of which consists of a screw shank ...

AI Technical Summary

Problems solved by technology

To sum up, it can be seen that the taper thread of the screw head of the existing locking bone screw and the lead of the coarse thread and fine thread of the shank are not publicly designed to be the same. Therefore, the locking fine thread bone screw and the locking coarse thread Bone screws cannot be applied to a locking metal bone plate at the same time. When one end of the patient's fracture is cortical bone and the other end is cancellous bone, the existing locking metal bone plate device is used to fix the bone, and one end of the cancellous bone locks the bone screw. The force is smaller than that of the cortical bone end, so there is a problem of insufficient fixation to the bone. Therefore, the commonly used locking metal bone plate device can no longer meet the needs of osteosynthetic treatment for the above patients

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