Clinical Corner: Information on Dental Procedures

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"Precision Trimming and Finishing of Current Dental Restorations Using the Safe End Bur System”

Dr. Ian Shuman 

Current highly aesthetic restorative materials can be finished to a surface that is indistinguishable from the surrounding tooth structure. The objective of this guide is to demonstrate the simplicity and rapid method with which the Safe End Bur System is used to trim and polish restorative materials. Because of their design, these burs can be used to provide a smooth finish on composites, ceramic margins, enamel, dentin, and other dental materials. TABLE 01

Composite Resin Finishing: Posterior Teeth

Figure 1 Finish grooves and fissures with a 10-blade #SE8 Safe End bur.

1. Choose the #7379 or the #7408 egg-shaped finishing bur, depending upon the amount of occlusal anatomy bulk present to be refined. 2. Occlusal grooves are initially placed into the composite by using the #7901 or the #7801 tapered finishing bur. 3. All grooves and fissures are finished with a 10 blade #SE8 Safe-End Bur (FIG 01) followed by refined polishing with a 20 blade #SE8 Safe End Bur.

Current composite resins can be finished to a surface that is indistinguishable from that of enamel. To insure optimal results, choose the correct instrument to task. Factors that Influence finishing bur shape selection when considering surface contour, tooth morphology is the number one determining factor in choosing the proper instrument to task for finishing composite materials.Composite Resin Finishing: Anterior teeth

Figure 2 Refine composite to a high polish with a 20-blade #SE9 Safe End bur.

Marginal decay has created the need for a composite restoration of this upper left canine. Following restoration placement and curing, gross composite is contoured using the 10 blade #SE9 Safe-End Bur followed by refined polishing with a 20 blade #SE9 Safe End Bur. (FIG 02)

Resin-Reinforced Glass Ionomer Finishing

Figure 3 Shape occlusal anatomy using the 10-blade #SE6 Safe End bur.

In this case, a primary tooth was restored using a resin-reinforced glass ionomer restorative material. Following bulk placement, primary and secondary anatomical form is first shaped using the flame shaped #7106 finishing bur, followed by the use of #SE6 Safe-End Bur (FIG 03). It is then refined by polishing with a 20 blade #SE9 Safe End Bur.

Ceramic Polymer Indirect Onlay: Margin Finishing

Figure 4 Polish margins using the 20-blade #SE4 Safe End bur. .

Using the minimally invasive restorative approach to tooth restoration and conservation, an indirect ceramic polymer onlay was fabricated and bonded to the lower right premolar using a dual cure resin-luting agent. Following complete cure, excess cement is removed and the margins are polished using only the 20 blade #SE4 Safe End Bur. (FIG 04)

Ceramic Veneer: Margin Finishing

Figure 5 Finish ceramic veneer margins to an even, smooth, refined polished surface using the 20-blade #SE3 Safe End bur. .

Ceramic veneers are a commonly used indirect restoration when correcting aesthetics. Here, following cementation using a dual-cure resin, the gross resin cement is removed at the margins with the 10 blade #SE3 Safe-End Bur. Next, the margins are finished to an even, smooth, refined polished surface using the 20 blade #SE3 Safe End Bur. (FIG 05)

Bis-acryl composite: Provisional finishing

Figure 6 Refine and polish composite provisionals with a 20-blade #SE8 Safe End bur. .

Refining joined provisional units to appear as individual teeth is as much an art as it is a science where form follows function. Here, using state-of-the-art bis-acryl autocure composite resin, the upper right lateral incisor and canine are modified to open the interproximal margins at the gingiva and at the facial to give them a lifelike appearance. This is easily accomplished using the 10 blade #SE8 Safe-End Bur followed by refined polishing with a 20 blade #SE8 Safe End Bur. (FIG 06)

Table 1:

Figure 7 The Safe End #SE3 and #SE4 instruments are designed to follow the angles of a tooth at the egress from the sulcus.

Trimming and Finishing Burs (FIG 07, 08) The Safe End Finishing Bur Kit of carbide burs on small (hybrid) composite resins produces a non-disrupted surface that is free from the striations and grooves left by diamond instruments. In addition, Figure 8 The Safe End #SE8 and #SE9 instruments are designed to have dimensions that correspond to the length and contour of natural tooth anatomy.

desired finishing results will be accomplished by considering factors such as dimensional bulk placement, the amount of overbuild to refine, depth and amount of layers of different shading and stain, degree and desired depth of texture. Excellence in Restorations is created by predictability. The finest restorations are created by the development of an orderly systematical sequence of treatment along with taking extra time and care on both the trimming and finishing of both the composite and the ceramic restoration. Proper selection is the key too creating natural looking composite restorations. The goal of instrument design is to provide the clinician with shapes that will make it easier to efficiently and correctly contour teeth. The Safe End Bur System of finishing and polishing carbide burs is a simplified approach that is highly desired for the dentist. This system is available in 10 and 20 bladed trimming and finishing burs.

10 Bladed: Twelve bladed finishing burs provide a smooth finish on composites, amalgam, enamel, dentin, and other dental materials.

20 Bladed: Twenty bladed finishing burs eliminate most surface striations and are used to obtain a semi gloss finish prior to final polishing. The finished surface created by 20-blade instrument produces smoothness acceptable for restorations.