CN201542683U

CN201542683U - Spiral vertebral arch pedicle opening drill

Info

Publication number: CN201542683U
Application number: CN2009200949285U
Authority: CN
Inventors: 刘一
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-15
Filing date: 2009-12-15
Publication date: 2010-08-11
Anticipated expiration: 2019-12-15

Abstract

The utility model discloses a spiral vertebral arch pedicle opening drill, which comprises a handle, a drill rod and a drilling bit. The rear end of the drill rod is fixed inside the handle; the drilling bit is integrally formed by the front end of the drill rod and the drill rod; the shape of the drilling bit is a cone; the diameter of a cone base is larger than that of the drill rod; a ball head is arranged at the top end of the drilling bit; three spiral grooves are arranged on the conical surface of the drilling bit; the bottom surface of each spiral groove is arc-shaped; the drill rod and the drilling bit are made of corrosion-resistant alloy materials; the handle is a flat body; the rear end of the handle is arc-shaped; and the handle is made of plastics or wood. The spiral vertebral arch pedicle opening drill has the advantages of simple structure, convenient operation, labor-saving use and capability of penetrating through vertebral arch pedicle cortex in one time.

Description

Spiral type pedicle of vertebral arch opening bores

Technical field

This utility model relates to a kind of medical apparatus and instruments, and particularly a kind of spiral type pedicle of vertebral arch opening bores.

Background technology

Spinal column is the important structure that supports human body, and it saves vertebra by one and is formed by connecting.When spinal column generation pathological changes (as fracture, tumor etc.), in treatment, to carry out internal fixation and keep it the human body supporting role to spinal column.Pedicle of vertebral arch is the continuous core of the place ahead vertebral body and rearward attachment structure in each joint vertebra, so proved the strongest fixed form at present by the fixation of pedicle spinal column.Pedicle screw technique for fixing began to use so far since the 1950's, and lot of documents shows that this technology has tangible clinical advantage for treatment vertebra various diseases.But because pedicle of vertebral arch is adjoined important organ pipe on every side, as the inboard spinal cord is arranged, there are thoracic cavity, abdominal cavity device and blood vessel in the outside at the breast loin, at cervical region vertebral artery is arranged, upper and lower sides then has nerve root, and any operate miss all might cause serious consequence, so it is most important accurately to insert pedicle screw.

Insert pedicle screw at present clinically, at first determine the pedicle of vertebral arch entry point by the bone mark positioning mode of vertebra, penetrate pedicle of vertebral arch surface projection place's cortex with hole making drill then, drill out the pedicle screw duct again, insert screw, hole making drill at present commonly used is sharp cone distal and three-blade shape, and it is little that it penetrates the cortex scope, increases the difficulty in probing pedicle screw duct.

Summary of the invention

To penetrate the cortex scope little in order to solve used clinically at present pedicle of vertebral arch hole making drill, increase probing pedicle screw duct difficulty these problems and a kind of spiral type pedicle of vertebral arch opening of providing bores.

This utility model is made up of handle, drilling rod, drill bit, wherein the rear end of drilling rod is fixed in the handle, and the front end of drilling rod and drilling rod be one-body molded a drill bit, drill bit be shaped as cone, the diameter at the awl end is greater than the diameter of drilling rod, the top of drill bit is a bulb, offers three road helical grooves on the conical surface of drill bit, the bottom surface camber of helical groove, drilling rod and drill bit are that anti-corrosive alloy material is made, handle is a flat-shaped body, and the rear end of handle is an arc, and handle is plastics or wooden making.

The beneficial effects of the utility model are: simple in structure, easy to operate, more laborsaving when using, can not destroy pedicle of vertebral arch internal orifice place cortex, and clear demonstration pedicle of vertebral arch inlet, be convenient to probe and enter.

Description of drawings

Fig. 1 is this utility model front view.

Fig. 2 analyses and observe enlarged diagram among Fig. 1 along the A-A direction.

Fig. 3 is this utility model vertical view.

Fig. 4 is the drill bit amplification plan view.

Fig. 5 is a bit head bit architecture parameter mark sketch map.

1, handle 2, drilling rod 3, drill bit 4, groove.

The specific embodiment

See also Fig. 1, Fig. 2, Fig. 3, shown in Figure 4: this utility model is made up of handle 1, drilling rod 2, drill bit 3, wherein the rear end of drilling rod 2 is fixed in the handle 1, the front end of drilling rod 2 and drilling rod 2 be one-body molded a drill bit 3, drill bit 3 be shaped as cone, the diameter at the awl end is greater than the diameter of drilling rod 2, on drill bit 3, offer three road helical grooves 4, the bottom surface camber of helical groove 4, drilling rod 2 is made for anti-corrosive alloy material with drill bit 3, handle 1 is a flat-shaped body, the rear end of handle 1 is an arc, and handle 1 is plastics or wooden making.

See also Fig. 2, shown in Figure 5, each size of drill bit 3 is as follows:

1, diameter d is 8 millimeters at the bottom of the vertebra;

2, top bulb diameter d 1 is 4 millimeters;

3, the height h of drill bit 3 is 8 millimeters;

4, the width h1 of groove 4 is 3 millimeters;

5, the degree of depth h2 of groove 4 is 3 millimeters;

6, the angle α of vertebra face and drilling rod centrage is 27 degree;

7, groove 4 is 30 degree with the angle β of drilling rod centrage;

Claims

1. a spiral type pedicle of vertebral arch opening bores, form by handle, drilling rod, drill bit, wherein the rear end of drilling rod is fixed in the handle, it is characterized in that: the front end of drilling rod and drilling rod be one-body molded a drill bit, drill bit be shaped as cone, the diameter at the awl end is greater than the diameter of drilling rod, the top of drill bit is a bulb, on the conical surface of drill bit, offer three road helical grooves, the bottom surface camber of helical groove.

2. spiral type pedicle of vertebral arch opening according to claim 1 bores, and it is characterized in that: described drilling rod and drill bit are that anti-corrosive alloy material is made.

3. spiral type pedicle of vertebral arch opening according to claim 1 bores, and it is characterized in that: described handle is plastics or wooden making.

4. bore according to each described spiral type pedicle of vertebral arch opening in the claim 1,2,3, it is characterized in that: each one of described drill bit is of a size of: cone bottom diameter (d) is 8 millimeters; Top bulb diameter (d1) is 4 millimeters; Highly (h) is 8 millimeters; The width of groove (h1) is 3 millimeters; The degree of depth of groove (h2) is 3 millimeters; The angle of the conical surface and drilling rod centrage (α) is 27 degree; The angle of groove and drilling rod centrage (β) is 30 degree.