A multifunctional bone screw for poor bone condition

A multifunctional, bone screw technology, used in fastening devices, internal bone synthesis, internal fixators, etc., can solve the problem that the short-term and long-term effects of surgery cannot be effectively guaranteed, the possibility of secondary revision for patients is increased, and the bone Uncontrollable cement dosage and other problems can reduce the incidence of surgical complications, reduce the risk of bone cement leakage, and prevent screw loosening.
CN103845110BActive Publication Date: 2015-12-02FOURTH MILITARY MEDICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
FOURTH MILITARY MEDICAL UNIVERSITY
Publication Date
2015-12-02

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Abstract

The invention discloses a multifunctional bone screw applied to a bone with a poor sclerotin condition. The multifunctional bone screw applied to the bone with the poor sclerotin condition consists of an outer screw and a self-locking expanding bar, wherein the outer screw is a whole body formed by a screw body and a base, the interior of the screw body is a cylindrical hollow part, the tip part of the screw body is provided with a gap cut along the longitudinal axis of the screw body, circular gradient type interface reinforcing holes are symmetrically formed in the gap along the thread pitch of an outer thread at intervals and are communicated with the cylindrical hollow part, and the apertures of the gradient type interface reinforcing holes from the tip part of the screw body to the back part of the screw body are sequentially reduced; the self-locking expanding bar is a cylinder body, the diameter of the cylinder body is slightly smaller than the inner diameter of the cylindrical hollow part of the interior of the screw body, the front end of the self-locking expanding bar is conical, an inwards V-shaped groove is arranged at the conical back part of the self-locking expanding bar, the self-locking expanding bar is wedged with the cylindrical hollow part of the interior of the screw body after being embedded in the cylindrical hollow part of the screw body. The multifunctional bone screw applied to the bone with the poor sclerotin condition, which is disclosed by the invention, simultaneously expands the screw body and realizes self locking, and can realize stable fixation operation effect under a poor sclerotin operation condition.
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Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to a bone screw, in particular to a multifunctional bone screw for poor bone quality. Background technique

[0002] Bone screw internal fixation technology is widely used in spinal internal fixation systems to correct vertebral fractures and congenital deformities caused by degenerative changes, trauma, inflammation, tumors, etc. However, due to the aggravation of the aging trend of the global population, the number of patients with osteoporosis characterized by osteopenia is increasing, and inflammation, tumors, etc. will lead to changes in the bone quality of the patient's systemic or local bones. The screw internal fixation technology is to enhance the holding force of the bone and the screw through the firm anchoring of the screw and the bone to maintain the stability of the spinal internal fixation system including the screw, and to achieve the purpose of correcting ver...

Claims

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