Left-handed flank angle screw

Abstract

The invention discloses a left-handed flank angle screw, and relates to the field of medical equipment. The left-handed flank angle screw comprises a screw body (1), a left-handed side angle (A) and a right-handed side angle (B), wherein the left-handed side angle (A) is arranged on one side of a thread of the screw body (1), and the right-handed side angle (B) is arranged on the other side of the thread of the screw body (1); and the left-handed side angle (A) is in an inward type. The left-handed flank angle screw has the following process route: barstock, longitudinal cutting processing center, numerical control turning, numerical control milling, polishing, cleaning, laser marking, fine cleaning, packing and warehouse entering. According to the left-handed flank angle screw, the connection and the fastening force of a thread can be effectively improved.

Description

Technical field: [0001] The invention relates to the field of medical instruments, in particular to a negative flank angle screw. Background technique: [0002] The fastening screw used in medical device products is mainly used for internal fixation of fracture patients, and it is a bone fixation device commonly used in orthopedic surgery. At present, the thread forms of medical orthopedic screws are generally divided into standard threads and non-standard threads. Different thread forms are selected according to the design structure of the product. In the field of orthopedic implants, spinal pedicle screws and pedicle screws are used in the field of orthopedic implants. The matching nuts and steel plate screws also have standard and non-standard thread forms, but their basic principle and function are fastening and connection. Now, whether it is domestic or foreign manufacturers, these types of thread forms are used. The problem faced clinically is the loosening or fasteni...

AI Technical Summary

Problems solved by technology

At present, the thread forms of medical orthopedic screws are generally divided into standard threads and non-standard threads. Different thread forms are selected according to the design structure of the product. In the field of orthopedic implants, spinal pedicle screws and pedicle screws are used in the field of orthopedic implants. The matching nuts and steel plate screws also have standard and non-standard thread forms, but their basic principle and function are fastening and connection. Now, whether it is domestic or foreign manufacturers, these types of thread forms are used. The problem faced clinically is the loosening or tightening of screws, the existing medical screws are not firmly connected and are easy to loosen

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