ONKOCET Ltd. has exhibited the devices from its portfolio on the MEDTEC UK exhibition in Birmingham, April 2011 through our partner Medical & Partners.
Freza Ltd. company produces burs with a wide variety of geometrical forms, sizes, and kinds of cutting surfaces ensuring any type of dental operations. There are burs of the following forms:
• cylindrical,
• cylindrical rounded,
• cylindrical pointed,
• needle-shaped
• conical
• tapered rounded
• tapered pointed
• tapered fine
• inverted conical rounded
• inverted conical
• parabolic
• flame
• elliptical
• pear-shaped
• round
The Company produces burs with the following forms of the cutting edge:
• thin symmetrical spiral cross-cut teeth
• normal right-side teeth
• normal right-side teeth with left-side spiral cross-cut thread
• normal symmetrical spiral cross-cut teeth
• very large symmetrical spiral cross-cut teeth
In total there are more than 80 items in “Freza” Ltd. company portfolio.
Every bur has a digital code - the ISO number. It consists of 15 figures (according to GOST R 50350.1-92 Dental rotary instruments. Number coding system. Part 1. General characteristics (ISO 6360-1-85) and GOST R 50350.2-92 (ISO 6360-2-85) Dental rotary instruments. Number coding system. Part 2. Shape and specific characteristics).
1. The first 3 figures describe the material of the working part and covering.
500 = tungsten carbide. We use only one kind of hard alloy appropriate to the application groups M10, K10 in accordance with ISO 513-2004 – tungsten carbide.
So, 500 are the first figures in the ISO number for all our burs without covering or with cover-ing of special type.
2. The second triple describes the shank (4th and 5th figures) and the overall length (6th figure).
104 = we use the shank of II type (according to GOST 26634-91 (ISO 1797-85) for fix in the straight handpieces. It is marked as 10. The overall length is standard for all our burs. It has the digital code 4.
So, 104 is the second triple of figures in the ISO number for all our burs.
3. The third triple of figures describes the shape of the working part of the bur.
001 = round (spherical)
112 = cylindrical
123 = cylindrical
116 = cylindrical
137 = cylindrical rounded
141 = cylindrical rounded
143 = cylindrical rounded
185 = needle-shaped
186 = needle-shaped
198 = tapered pointed
199 = tapered fine
200 = tapered rounded
201 = tapered rounded
225 = inverted conical
237 = inverted conical rounded/ peer-shaped
243 = flame standard
257 = flame
274 = parabolic
277 = elliptical
289 = cylindrical pointed
291 = cylindrical pointed
468 = tapered triangular
4. The forth triple of figures describes the type of cutting:
110 = cross cut super fine
140 = cross cut fine
175 = plain cut standard
176 = spiral fine
190 = cross cut large
220 = cross cut coarse (very large symmetrical spiral cross-cut teeth)
135 = left-hand spiral cut fine
103 = left-hand spiral superfine
133 = right-hand spiral fine
336 = right-handed spiral large
5. The last three figures (the fifth triple) describe the nominal size – the largest head diameter of working part in 1/10 mm
010 = Size 1.0 mm
012 = Size 1.2 mm
014 = Size 1.4 mm
016 = Size 1.6 mm
018 = Size 1.8 mm
021 = Size 2.1 mm
023 = Size 2.3 mm
040 = Size 4.0 mm
050 = Size 5.0 mm
060 = Size 6.0 mm
2.2.1 Digital code of every bur obeys GOST R 50350.1-92 Dental rotary instruments. Number coding system. Part 1. General characteristics. (ISO 6360-1-85 “Dental rotary instruments. Number coding system. Part 1. General characteristics.”) and GOST R 50350.2-92 Dental rotary instruments. Number coding system. Part 2. Shape and specific characteristics. (ISO 6360-2-85 “Dental rotary instruments. Number coding system. Part 2. Shape and specific characteristics.”).
2.2.2 Burs with standard fine toothing (see Pictures 1-7) are used for finishing operations and slight removal of gold, other metal and acrylic plastic materials.