CUTTING INSTRUMENT

Handpiece :
- Burs
- twist-drill
- abrasive-stones
- cutting-disks

Standard ISO 6360

Material untuk mata bur :
Logam/ steel
Stainless steel
Karbid Wolfram
Aluminium Oksida
Intan
Material : Baja Antikarat
Stainless steel

Corrosion resistant

Murah, tapi mudah aus dan keropos (terutama dalam desinfektan) disposible (sekali pakai)

Kecepatan > 50.000 rpm akan merusak bur

Material : Karbid Wolfram
Extremely hard materials

Can be used a very high speed

For softened and hard materials

brittle

Penggunaan : bur lab, pemotong akrilik, keperluan presisi tinggi

Material : Aluminium Oksida
Corundum (Al2O3),

keras seperti intan tp lbh murah

Dapat disesuaikan bentuknya

Menggerinda akrilik, matriks resin dari komposit dan logam

Kurang baik untuk porselen karena bereaksi dengan gelas (Porselen : digunakan silikon karbid)

Material : Intan
Dapat memotong hampir semua benda

Dapat menimbulkan panas tinggi yang dapat melelehkan beberapa material tertentu

Mata bur mudah tersumbat krg tajam

Perlu ; coolant water spray, minimizes wear, a diamond cleaning rubber, ultrasonic cleaners with a detergent bath

Bentuk Tangkai Handpiece :
Standard handpiece bur
Handpiece bur
Contra-angle standard
Standard friction-grip
Unmounted grinding points

Bentuk Kepala Bur :
1. Round : initial preparation, removal of softened and dentin decay

2. Inverted-cone : undercut for filling retained

3. Cylindrical : preparation wall extend
(silinder)

4. Conical(kerucut) : full crown prep.

5. Pear-shaped : finishing metal restoration6. flame-shaped : making smooth edge prep. (finishing)7. Bud-shape : reduce lingual ‘n occlusal for crown8. Torpedo-shaped : finish line for metal restoration (chamfer-edge)9. Lens-shaped : finishing bur 10. Disk / cakram : interproximal prep., cutting (crown)