Anatomic plate for complicated scapula body fracture

Abstract

The invention provides an anatomic plate for complicated scapula body fracture. The anatomic plate comprises an internal margin (1), an external margin (2), a scapular spine (3) and an infraspinous fossa (4) which can fit a scapular body, wherein the external margin (2) is smoothly connected with the internal margin (1), the scapular spine (3) and the infraspinous fossa (4) sequentially with arcs along the clockwise direction; the internal margin (1), the external margin (2), the scapular spine (3) and the infraspinous fossa (4) are connected to form a scapular-like irregular triangular shape; the infraspinous fossa (4) is bent upward; and a connecting piece (5) is connected between the internal margin (1) and the infraspinous fossa (4). The anatomic plate has the appearance which completely accords with the anatomic characteristics of a scapular body, can well fit the scapular body, has an elasticity modulus in accordance with the mechanical requirement of the scapula body, has the advantages of reliable fixing, small stress shielding and reasonable structure, and is applicable to various types of complicated scapular body fractures.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to an anatomical steel plate for complex scapula body fractures. Background technique [0002] The scapula is a flat and wide irregular bone in an irregular triangular shape, and it is an important part of the shoulder blade of the upper limb. In the process of raising the upper limbs, if the scapula is fixed, the upper limbs can only be lifted to 90 degrees actively and 120 degrees passively. When the scapular movement is lost, the shoulder movement is reduced by at least 1 / 3 of the normal movement. According to the statistics of Hardegger et al. and Nordqvis et al., scapula fractures account for 3% to 5% of shoulder fractures and 0.5% to 1.0% of systemic fractures. In recent years, with the rapid development of the economy, the multiple complex fractures of the scapula caused by high-energy injuries such as car accident injuries and high-fall injuries have ...

AI Technical Summary

Problems solved by technology

The bones of the pelvis bear a lot of stress, the thickness of the steel plate is 2.5-2.7mm, and the elastic modulus is high; while the scapula bears little stress. If the pelvic plate is fixed, the excessively high elastic modulus will increase the stress shielding effect and lead to fracture healing Slow, disuse atrophy of bone

At the same time, the current internal fixation for complex scapular body fractures has too thick a steel plate, too much stress shielding, a non-integral structure, it is difficult to resist shear force, and there is no suitable anatomical shape

[0005] At present, the scapula bone plate that has appeared completely wraps the scapula when fixing the scapula, so the stress shielding is too large, which affects the fracture healing. At the same time, the bone plate completely covers the bone, so that the muscle is completely separated from the bone and loses the original contraction of the muscle. The function that makes the joint move

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