Combined artificial intervertebral disc

Abstract

The invention relates to a combined artificial intervertebral disc, which comprises an upper end plate, an upper end plate gasket, a middle disc, a lower plate and a lower end plate gasket, wherein an upper positioning beam is designed at the upper end surface of an upper plate; the lower end of the upper plate is provided with a fixing pin or a fixing groove; the upper end of the upper end plate gasket is provided with a fixing groove or a fixing pin; the lower end surface of the upper end plate gasket is a circular inner cavity; the inner surface of the circular inner cavity is smooth; the middle disc is in a circular disc shape; the outer surface of the middle disc is smooth; the upper end surface of the lower end plate gasket is provided with a position limiting ring; the lower end of the lower end plate gasket is provided with a fixing groove or a fixing pin; the upper end surface of a lower end plate is provided with a fixing pin or a fixing groove; and a lower positioning beam is designed at the lower end surface of the lower end plate. The combined artificial intervertebral disc has the design characteristics that sliding matching components including the middle disc, the upper end plate gasket and the lower end plate gasket are used; and during material selection, the ceramic-to-ceramic matching can be selected, and other materials can also be selected for matching.

Description

Technical field [0001] The invention relates to an artificial intervertebral disc, in particular to a combined artificial intervertebral disc. Background technique [0002] All artificial cervical intervertebral discs currently used in clinical practice are either limited in the direction of movement or limited in material selection due to design defects. These make it difficult to reduce the stress generated by the intervertebral disc as expected, which brings safety to patients’ daily life Hidden dangers, such as patents CN 101961270 A, CN 105708584A, CN 105105890A, CN103417313 B, and other artificial intervertebral discs have been disclosed. The limitation of choice makes the friction of the mating part not more resolved, because these designs should consider the biocompatibility, corrosion resistance, and physical properties of the materials used in the upper and lower end plates with the human body when considering the friction of the mating parts. Strength and other proper...

AI Technical Summary

Problems solved by technology

[0002] All artificial cervical intervertebral discs currently used in clinical practice are either limited in the direction of movement, or are limited in material selection due to design defects, which make it difficult for the stress generated by the intervertebral disc to achieve the expected reduction, which brings safety to patients' daily life Hidden dangers, such as patents CN 101961270 A, CN 105708584ACN 105105890A, CN103417313 B, and other disclosed artificial intervertebral discs, the cooperation between the core block and the upper endplate and the lower endplate or the direct cooperation between the upper endplate and the lower endplate due to the material Due to the limitation of selection, the friction force at the mating part cannot be fully resolved, because when considering the friction of the mating part in these designs, more con

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