PLANEX SET

This set of burs was assembled in collaboration with: Dr. Spang

Description

How to use

Definition
Planex stones are diamond coated, cylindrical burs with a rounded edge. The central area of their top surface has been kept smooth. They are coated with a one and a half fold diamond layer. The diamond coating includes the edges and the perimeter of the bur's top surface. The smooth center of the surface is at level with the surrounding diamond layer.

Planex stones are manufactured in the standard ISO sizes of 014, 016 and 018 and are coated with a layer of normal ( 80 um ) or fine ( 40 um ) diamond particles.
Their working length is 8 mm. The rounding of the edges is proportional to the diameter. The external dimensions of the burs fulfill ISO specifications independently of their diamond grain sizes. The three different sizes are marked by 1, 2 or 3 rings on the shank.

The standard set is supplemented by 3 margin finishing burs ( Order No. D18 ) whose grain sizes range from normal, to fine and ultrafine ( 15 um ).
Their purpose is to prepare, smoothen and polish shoulder edges and preparation margins. The grain sizes are color coded.

The table on p. 2 gives an overview of all the details.
 

Function

The burs, when held vertically on the soulder, only work laterally. The smooth surface on the top surface limits vertical progression. This design allows the deepening of shoulders at a predetermined level with minimal vertical alterations. When heid obliquely, the bur will be active axialiy, thus allowing the apical relocation of a shoulder. The technique produces smooth and internally rounded shoulders thereby improving the statics of the abutments. Compared to sharp internal angles, internally rounded shoulders will also facilitate laboratory procedures. Since Planex burs arg of the same shapes and dimensions in all grain sizes, the geometry of the preparabon is left intact during refinement of the abutment surfaces.
 

Indication

shoulders and boxes of any shape for the placement of fillings or gold-, ceramic- or composite inlays. They are also suited for the preparation of telescopes, ceramic- and veneer crowns. Further,telescopes, ceramic- and veneer crowns. Further, a shoulderless abutment.

Technique recommendations

For all preparation designs :

• Use a high-speed handpiece (40.OC)0 - 80.000 rpm) with water cooling (at least 50 ml/rnin)

• Reduce bulk with Planex burs No. 1, 2 or 3.

• Open interdental spaces with margin finishing burs D 18 N and D 18 F.

• Perforrn finishing procedures with fine grain Planex burs.

• Smoothen and polish preparation margins with margin finishing burs D 18 F and D 18 SF.

For crowns with circular shoulder we recommend to mark the location of the shoulder with a fine pencil. The burs are guided vertical to this line and by lateral milling motions, a shoulder is established. Simultaneously, the operator defines the axial walls of the abutment. lf the shoulder is to be relocated more apically, the bur is angled slightly and guided over the shoutder again. So as to produce crisp margins, the shoulder edges are smooth-ened and polished with m„rgin finishing burs.

For crowns with partial shoulder preparations, start by removing undercuts and by giving adequate taper to the abutment preparation. The shoulder is prepared scondarily, usually in visually accessible locations only.

For complex fillings and inlays, Planex burs will allow the placement and finishing of boxes, shoulders and margins. Edges can be bevelled with the F series of burs. Chamfers and smoothened gingival marginal areas are developed with margin finishing burs.
 
 
 

For the detail information, please, contact our representative:

E-mail: sc@ukrdental.com