Pack
Kit
Kit$260.33
The Directa Directa Poly Molar Crown Kit is a miscellaneous product supplied by Directa for dental use. Catalog code 609550.
Directa Poly Molar Crown Kit is a crown form from Directa. Manufacturer part number 609550.
Find it on our Crown & Bridge shelf, under Crown Forms.
Orders placed before 3 PM ET ship the same day when the item is on our shelf (otherwise within 3 business days), and ground shipping is free over $10.
| GTIN / barcode | 17310236095504 |
|---|
Product
- Manufacturer
- Directa
- Manufacturer #
- 609550
- Item code
- 107-0275
Catalog path
- Marketplace
- Clinical
- Category
- Restorative & Cosmetic
- Subcategory
- Crown Forms
Ordering
- Status
- Ships in 3 business days
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Questions
What is Directa Poly Molar Crown Kit used for?
The Directa Directa Poly Molar Crown Kit is a miscellaneous product supplied by Directa for dental use.
When does it ship?
In-stock orders placed before 3 PM ET ship the same day; anything not on our shelf ships within 3 business days.Ground shipping is free over $10.
About crown forms
Preformed provisional crowns, also called matrices, are tooth-shaped shells of plastic, cellulose acetate or metal. They come in a range of tooth sizes and are picked for a particular tooth anatomy. A shell is commonly relined with acrylic resin for a closer fit before it is cemented, and the plastic and metal shells can also be cemented straight onto the prepared tooth. The FDA calls this a preformed crown, a Class I device of plastic or metal, affixed temporarily to a tooth after the natural crown is removed or broken, and used as a working restoration until a permanent crown is made (21 CFR 872.3330).
Provisional crowns are either prefabricated or custom made. The shelf holds the prefabricated shells, as singles and as kits of several sizes.
What to look at when choosing a crown form
Size and shape: the forms are numbered by size, and the shelf carries anterior and molar shapes. Temporary materials have run from acrylics and premade crown forms to bis-acryl materials and computer-made restorations.
What the provisional has to do: cover exposed dentine, prevent unwanted tooth movement, maintain function, allow oral hygiene, prevent gingival overgrowth and give an adequate interim appearance.
Sources: Mohan et al. 2016, In vitro comparative evaluation of mechanical properties of temporary restorative materials used in fixed partial denture (J Pharm Bioallied Sci) · FDA 21 CFR 872.3330, Preformed crown · The Glossary of Prosthodontic Terms, 9th edition (J Prosthet Dent 2017) · Nejatidanesh et al. 2013, In vitro comparison of flexural strength and elastic modulus of three provisional crown materials (J Clin Exp Dent)
