Access Crown The First Step to Efficient and Accurate Temporary Fabrication

Author : Dental Product Shopper
Published Date 04/30/2012
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Access Crown The First Step to Efficient and Accurate Temporary Fabrication

Access Crown from Centrix is a bis-acryl product designed for efficient and accurate fabrication of temporaries. This class of provisional materials is significantly better than traditional methyl-methacrylates and ethylmethacrylates for several good reasons.

First, when fabricating provisionals, Access Crown gives off no volatile vapors like methacrylates, so your dental office will not smell like a nail salon. Second, there is no significant shrinkage, so relining is not necessary, and there is little chance of ever getting a provisional ?locked on? the preparation. Bis-acryls are also initially more esthetic and provide better color stability than traditional acrylics.

The Access Crown Advantage

Access Crown offers advantages over some of the other bis-acryls currently available. It is packaged in the 1:1 format cartridge, instead of a 10:1 format cartridge, so it will work in most highpressure dispensing guns. Also, it uses a smaller mixing tip, so there is less waste of the material.

Access Crown has one of the fastest setting times available (less than 1 minute), preventing the dreaded wait times. The material is available in a myriad of shades, so matching is not a problem, and it polishes very easily as well. It offers excellent translucency compared to some of the other products as well.

Access Crown has a higher fracture toughness than many other bis-acryl brands, nearly eliminating broken temporaries.

Access Crown Pearls

The most common ways to use Access Crown clinically are with preoperative alginate or silicone impressions, or with matrices made from diagnostic mock-ups on study models. When sufficient tooth structure is available, a simple dual-arch alginate or silicone impression is the more efficient way to provide a matrix for the provisional.

A little trick to make the provisional fit better and provide sufficient thickness at the margins (especially on the facial where there may have been pre-op ditching or abfraction) is to use an acrylic bur to slightly ream out the impression at the facial margin. When this is later used as the matrix for the Access Crown provisional, it will provide sufficient room for the material, which will yield a well-made provisional crown that will likely require no additional lining or patching of the temporary at the margins.

We remove the impression matrix at the 45 second mark, tease off the Access Crown provisional with an explorer, quickly trim any flash with iris scissors, reseat, and have the patient bite firmly into occlusion. At approximately 1 minute, we remove it, finish with discs and polish with paste. It is ready for cementation.

Material of Choice

With its ease of use, shade selection, fast set, and competitive cost, Access Crown has become one of my materials of choice for the fabrication of well fitting, strong, and esthetic provisional crowns and bridges.