Introducing OVC4

The first lab-made crown/onlay that is prepared and fitted in just one visit. No CAD/CAM needed.

We’ve made some significant changes that we believe will greatly improve the way you use the One Visit Crown.

Try OVC4

Request a copy of the lab prescription form here.

Why are we making the change to OVC4?

We’ve listened to your feedback and have made changes so the OVC procedure and ordering process better meet your needs. OVC4 is now custom-made by our lab technicians for your individual patient, removing any concerns you may have had about measuring and sizing an OVC. It also now comes with a custom-made Occlusal Seating Guide allowing you to get the positioning and occlusal height exactly right for each case.

Occlusal Seating Guide

Advantages of the OVC4 and what this means to you

How does OVC4 work?

The key to OVC4 is that a quick fast-set impression is taken of an UNPREPARED tooth, at your patient’s CONSULTATION

This is very different from a traditional lab crown as you do NOT need to prepare the patient’s tooth prior to taking the impression. This means that the patient’s tooth can be prepped, and the OVC fitted, in just ONE appointment.

How does OVC4 work?

The key to OVC4 is that a quick fast-set impression is taken of an UNPREPARED tooth, at your patient’s CONSULTATION appointment.

This is very different from a traditional lab crown as you do NOT need to prepare the patient’s tooth prior to taking the impression. This means that the patient’s tooth can be prepped, and the OVC fitted, in just ONE appointment.

Frequently Asked Questions

We’ve now developed a delivery system that will qualify for dental insurance thereby making it more accessible to all patients.  It’s important to recognise the OVC material has remained 100% constant since it was launched in 2014 and it is the procedure and method of delivery which has changed over time. We’ve been listening to customer feedback and constantly improving the procedure to meet your needs. 

The OVC4 clinical procedure is the same as the OVC3 procedure. The difference is that now the OVC is custom-made by our laboratory using a model, to get the shade, fit and occlusion right for your patient. We have also added a custom-made Occlusal Seating Guide to help you get the position and height of the OVC just right. We’ve also worked on ways to help you get tight contacts with the use of a retainer ring.

OVC4 differs from a traditional laboratory crown in that the fast-set impression is taken at the patient consultation appointment, of the un-prepped tooth. This means there is no need for temporary crowns. It is the only lab-crown that can be prepped and fitted in a single visit.

Yes – we recommend you use up your current OVC3 stock – if you find you do not have the correct OVC3 size in stock – you can then order an OVC4 for that patient (just be sure to allow enough time for the custom OVC4 restoration to arrive).

Around 10 working days. Because the OVC4 will now be custom-made for your patient for an accurate fit, we need to perform a similar process to a normal dental lab. We still need time to receive the impression (of an unprepped tooth – this contrasts with a regular dental lab that requires an impression of an already prepped tooth) and then use this impression to custom-make the OVC4 and seating guide. We recommend our customers leave at least 2 weeks between the initial consultation appointment and the OVC4 procedure appointment.

Even though our lab technicians now have additional work to prepare the custom-made OVC4, we are pleased that we have been able to keep the price the same as the OVC3. As an added bonus, we will now offer free shipping on all orders going forward.

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.

Just like a traditional lab crown, you must complete an individual OVC4 Prescription Form for each order. This is then sent to us along with the impression of the un-prepped tooth, that you take during your initial patient consultation appointment. We supply pre-paid postage bags for you to send us the impression, and we will send your custom-made OVC4 with free shipping also.

Download the NZ prescription form here.

Download the Australian prescription form here.

We recommend Dual-arch trays.

The impression is of a UN-PREPPARED tooth.

The impression is best taken at the initial consultation. If, at the consultation, the patient is unsure as to which treatment option to take, we recommend taking a “no obligation quick impression” to prevent the patient having to return.

For a usable impression, please ensure the following:
• The patient’s teeth must be in centric occlusion.
• Include teeth on either side of the treatment tooth.
• Canines should be in the impression as our lab needs canine-guidance to get the occlusion correct.
• The entire crown of the tooth to be treated should be in the impression. Less impression material is required for the opposing arch as only the occlusal surfaces are required.

Material choice

Any silicone impression material is suitable. We recommend fast set PVS materials such as bite impression materials. Cavex ColorChange Alginate is also acceptable as this is dimensionally stable for 7-9 days. If you are concerned about the longevity of alginate, please cast the treatment side with stone-plaster.

Wrap in damp tissue and place in a Ziplock bag. Wrap impressions carefully in bubble-wrap to minimise the chance of distortion during shipping to the lab.

Yes, we’d like to encourage all our customers to try the OVC4, so we are offering a 30-day money back guarantee on all OVC4 orders. If you are not 100% satisfied, we want to know about it so we can continue to improve the product and procedure.
No. The uncured sub-layer is the same as the OVC3, and simply requires etching and bonding.

Yes, we now accept digital scans for New Zealand and Australia. Click here to submit a scan.

Please contact one of our product specialists by emailing or call our free-phone number.


Better still, we will now be structuring the quantity discounts on a monthly basis rather than on a per order basis. No longer do you need to guess what sizes you need to qualify for the discount, nor do you need to keep stock on hand.


  1. Buy 10 OVC’s in one month and receive a 5% discount on the following month’s orders
  2. Buy 20 OVC’s in one month and receive a 10% discount on the following month’s orders

Want to get started?

Request a free OVC4 Welcome Pack using the form here, and we will get it shipped out to you as soon as possible. The OVC4 Welcome Pack contains;

  • 1 pre-paid courier bag
  • Prescription order forms
  • OVC4 instructions for use booklet that contains a useful chairside guide on the reverse
  • You can choose if you would like to include more patient brochures

30-day money back guarantee*

If you’re not completely satisfied with OVC4, we are offering a 30-day money back guarantee so you can try OVC4 risk free.

*terms apply

Upcoming One Visit Crown Events