For private patients with dental insurance – the OVC is a custom-made onlay/crown (see below for an outline of the process).
In Australia, a lot of our customers have chosen to use the insurance codes 555 and 613, depending on the level of preparation required for the individual patient. We recommend you read the definitions below and decide which code is best for you.
The ADA definition of these codes:
555 Tooth-coloured restoration – five surfaces – indirect. Indirect non-metallic restoration, involving five surfaces of a tooth.
613 Full crown – non-metallic – indirect. An artificial crown constructed with tooth-coloured material, restoring a natural tooth.
The ADA definition of the terms “Direct” and “Indirect”:
The terms “direct” and “indirect” are used to distinguish between restorations/services fabricated directly in the mouth (direct) and those fabricated outside the mouth using models, copings or digitised images (indirect). A dental technician may assist in the fabrication of indirect restorations. Certain restorations use both intraoral and extraoral procedures but are to be itemised by the predominant element of fabrication. Example: Some resin-based restoration materials are formed in the mouth but are removed for extraoral curing and finishing before cementation/insertion. These are to be itemised as direct restorations. Some restorations are milled extra-orally before cementation/insertion. These are to be itemised as indirect restorations.
The OVC4 Process and how it is custom-made:
The OVC4 is made under prescription outside of the mouth at Rhondium Dental Laboratories using a dental impression and plaster models. The crown is custom-made as follows:
1. The peripheral form and contours are constructed to match the patient’s original tooth form.
2. The occlusal anatomy is constructed according to the tooth-type anatomy and the opposing dentition. This means that every OVC4 is unique and all are different shapes. Articulating paper and occlusal adjustments are repeatedly used to confirm that the occlusion is correct both in centric occlusion and with lateral excursions for that particular patient.
3. A custom-made Occlusal Seating Guide (jig) is manufactured by the dental technician by placing the OVC4 in the ideal position, making the occlusal adjustments described above, and then using the neighbouring teeth of the plaster model to create a custom Occlusal Seating Guide. This guide enables the dentist to position the OVC4 in exactly the same three-dimensional position as set by the dental technician. The Occlusal Seating Guide will only fit that particular patient.
4. A statement of manufacture is included with provided dental crown/onlay.