Compass | Crown-cutters and filling removers

Fast-cutting specialist for separating non-precious metal

separates extremely hard alloys

ceramic veneers and metal frames

Effi cient composite removal

Pressure-free separation with a perfect view

H 35 L

H 4 NP

H 4 MCL

4 COMP

4 ZR

4 ZRSH32

„Jack“ for splitting

Fast-cutting specialist for removing amalgam

For grinding down crowns

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A

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All-ceramic restorations Universal

Precious metal Non-precious m

etal

Fi

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Cro

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Komet Dental · Gebr. Brasseler GmbH & Co. KG · Postfach 160 · 32631 Lemgo · Export: Telefon +49 (0) 5261 701-0 · Telefax +49 (0) 5261 701-329 · export@kometdental.de · www.kometdental.de

ca. 45°

4 5

Separation of all-ceramic crowns

• Split all-ceramic crowns with Jack (4ZRS): In front teeth, cut across the axial surface up to and beyond the inci-sal edge. Molars: Cut along the occlu-sal surface to simply break the crown open (4).

• Adhesive crowns can be opened piece by piece with crown dilating forceps (5). Start in the cervical region - as far as you can - and then remove further fragments step by step, working in an incisal or occlusal direction. Like this, lever forces exerted on the crown core can be prevented to a large extent.

• Grind down any remaining fragments with the longer crown-cutter 4ZR.

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General information

• Optimum speed: (160,000 rpm in the micro motor.

• Always work with sufficient cooling (at least 50 ml/min).

• Do not exceed a maximum contact pressure of 2N.

• We recommend reducing the speed to 120,000 rpm when working on alloys that make instruments “skip”. Alternatively, you can work with a dental turbine at low contact pressure.

• For an optimum cutting performance, apply the instrument to the crown at an angle of 45° (1).

Separation of PFM crowns

• When removing PFM crowns, start with the veneer and then separate the metal frame (2, 3).

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Perfect removal of crowns