Bone dilator

Abstract

The present invention relates to a bone dilator designed for treating osteoporotic compression fracture of vertebral body, fractures of cancellous bones at other sites and certain traumatic or pathologic compression fracture of vertebral body. The bone dilator comprises a head portion, a neck portion, a connecting tube, a handle and a rotary hilt; the head portion and the neck portion are integrated as a whole via hinged joint therebetween; the head portion, the neck portion, the connecting tube and the handle are hollow bodies, in which a pull rod is arranged; at the center of the rotary hilt is disposed a tension bolt, which is connected to the pull rod; the front end of the pull rod is provided with bar stays at both sides thereof, and the two ends of the bar stays are respectively movably connected to the pull rod and the head portion; the distal end of the connecting tube is movably connected to the proximal end of the neck portion, and the proximal end thereof is fixedly connected to the distal end of the handle; a hilt support is disposed at the proximal end of the handle, and the rotary hilt is movably connected to the hilt support. The head portion consists of two parts of the same or dissimilar shapes, and embodies different shapes, such as racket-shaped, rectangular shape, elliptical shape, circular shape or semicircular shape, etc., for use at different locations. The neck portion assumes a shape of two semicircular tubes. When the head portion and the neck portion completely join together, the distal end of the pull rod and the bar stays are completely or partially retracted in grooves inside the head portion and the neck portion.

Dependencies are inferred from the claim text.