What Is a Skew Chisel?

Osteosynthesis is a surgical instrument used for orthopedic surgery to repair bones and chisels ^[1] . Osteotome is divided into (large, small), flat osteotome (straight, curved), round osteotome (straight, curved), hollow shell, etc. The main technical indicators are that the edge of the osteotome should be sharp without chipping The phenomenon of curling edge; The connection part of osteotome should be fixed firmly, and it should not be loose or fall off when working.

Chinese name: Osteotome
Foreign name: Osteotome

Management category: Class I medical devices
Category Name: Saw, chisel, file for orthopedic (orthopedic) surgery

Osteotomy definition

Osteotome is a commonly used surgical medical tool in clinical practice of orthopedics. Osteotome is mainly used for repairing bone surface and bone removal. The osteotome used clinically is usually designed in one piece. The head cuts bone tissue.

Contraindications for osteotomy

1. Metal allergies are prohibited.

2. The elderly, osteoporosis, diabetes and other patients should not be used with caution.

The structure of osteotome

The osteotome is mainly composed of a chisel and a chisel. According to its shape, the chisel can be divided into straight, curved, straight, double, right-angled, curved, double oblique flat blade, curved double oblique flat blade, round blade The chisel body can be divided into round shank, hexagonal shank, oblate shank, flat square shank, square shank, etc. according to the difference of the shank. The edge of the chisel blade is short and thick. When using a bone hammer, the bone cutting edge is relatively thick and high in strength.

Osteotome type

Straight double oblique / single oblique flat-edged square shank bone chisel, straight double oblique flat-edged flat shank bone chisel

Square Flat Stem Bone Chisel

2. Straight double oblique / single oblique flat blade square shank bone chisel, straight round blade square shank bone chisel

Flat-blade, straight-rounded square shank bone chisel

Arc round chisel

Arc Round Chisel-1

Arc Round Chisel-2

4. Straight single oblique flat-blade round osteotome, curved single oblique flat-blade round osteotome

Straight single oblique, curved single oblique flat blade round shank osteotome

5. Angle curved double oblique flat-blade round osteotome, angle curved round-blade round osteotome

Angle curved double oblique flat blade, angle curved round blade round shank osteotome

6. Double curved single oblique flat-blade round osteotome, right-angle curved single oblique flat-blade round osteotome

Double curved single oblique flat blade, right angle curved single oblique flat blade round shank osteotome

7. Straight round-blade round osteotome, curved round-blade round osteotome

Straight round blade, curved round blade round shank osteotome

8. Straight double oblique flat blade round shank osteotome, straight round blade hexagon shank osteotome, curved round blade hexagon shank osteotome

Straight double oblique flat-blade round osteotome

Limitations of osteotome use

1. The head of an osteotome commonly used in orthopaedic surgery has only a sloped blade surface. The edge of the osteotome blade is short and thick, so there is a danger of chipping the bone during operation.

2. Due to the small gap in the bone cavity, when the osteotome extends into the bone cavity, the vision of the medical staff will be affected, and because there is no visible light source in the bone cavity, the medical staff cannot see the position of the bone cement, only Being able to knock on bone mud by feeling increases the risk of injury to bone tissue and nerves.

3. In the process of osteotomy, the bone fragments generated need to be cleaned at any time, which prolongs the operation time and reduces the operation efficiency.

Technical indicators of osteotomy

1. Osteotome should have good cutting performance, sharp cutting edge, no missing edge and chipping edge.

2. The osteotome handle connection should be firm and free of looseness.

3. The outer surface of the osteotome should be smooth and free of sharp edges, burrs and cracks. The handle flower should be clear and complete, without missing teeth and rotten teeth, no obvious trachoma and deposits at the welding site, and the color and gloss of the surface oxide film of the aluminum handle should be consistent.

4. Osteotome has good corrosion resistance.

Osteotome osteotome cleaning

1. The osteotome should be cleaned immediately after use. If dirt residues remain on the instrument and coagulate, it will make subsequent cleaning more difficult; if the adhesive material of the instrument is hardened on the instrument, it will damage the instrument; if the instrument is left for a long time, it will not be processed. Contaminants can corrode equipment.

2. During the disinfection and cleaning process, collision impact shall be prevented. The collision impact may cause the osteotome with a cutting edge to be damaged, and excessive force or pressure cannot be used during the cleaning process.

3. The osteotome should be stored in a special container or placed in a suitable device and handled separately to avoid damage to the cutting edge.

4. When cleaning by hand, use a soft rag, plastic brush or cleaning gun. Do not use metal brushes or flushing reagents. To avoid water stains, the instruments must be dried immediately after cleaning.

5. Any chemical method of sterilization will have different degrees of impact on the instrument. Therefore, units with conditions should choose high-temperature and high-pressure physical methods to sterilize, which can effectively extend the service life of the instrument.

6. When sterilizing by chemical method, do not immerse the instrument in normal saline, because pitting or rust will occur when it comes into contact with normal saline.

Osteotomy Extended Reading

[1] Wang Xinwei, Chen Deyu, Jia Lianshun, etc. Design of "U" double-edged osteotome and its application in anterior cervical decompression and fusion [J]. Chinese Journal of Orthopedic Surgery, 2001 (08): 103-104.

[2] Ding Jihong. Surgical treatment of 40 cases of lumbar spinal stenosis [J]. China Modern Drug Application, 2013, 7 (14): 105-106.