PKT wax carvers for dental wax modelling
Cervical wax contains geo - Modeling with a very low retraction.
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Référence: H100234
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Livraison 24/48 h en France
Livraison 2 à 5 jours Europe
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** Pour un achat de 300 à 1100 € en France (Choix dans le panier) - *Uniquement en France
Brand: Renfert SKU: H100234 Manufacturer ref.: 4861000 75 g wax block
GEO Classic Renfert cervical wax for precise cervical margins
GEO Classic Renfert cervical wax is a hard, organic, tension-free dental laboratory wax designed to create thin, stable and clearly readable cervical margins on crowns, bridges and pressed ceramic restorations.
Indication
Cervical adjustment of wax patterns
Techniques
Crowns, bridges, metal-ceramic, pressed ceramic
Colour
Transparent burgundy / high-visibility red
Lab benefit
Very low shrinkage, residue-free burnout, clean marginal fit
Renfert cervical wax for stable, clean marginal definition
In fixed prosthodontics, the accuracy of the cervical margin directly affects marginal fit, casting quality and the reliability of the final restoration.
GEO Classic Cervical Wax Renfert enables fine adaptation along the preparation margin, using a stable, easy-to-carve wax developed for the precision requirements of dental laboratories.
Its organic, tension-free formulation helps minimise deformation after cooling.
The wax preserves the position of the modelled cervical area, helping dental technicians achieve more consistent restorations in critical areas such as shoulders, chamfers, cervical finish lines and crown margins.
Key benefits of GEO Renfert cervical wax
Very low shrinkage
The wax helps maintain a stable cervical margin after application, cooling and finishing.
Residue-free burnout
Its organic composition burns out cleanly, an essential advantage for casting and pressing techniques.
Hard and precise wax
The wax hardness supports scraping, refining and clear visual control of the marginal edge.
Flexible laboratory workflow
It can be used with a Bunsen burner, induction heating or an electric wax knife, depending on the laboratory protocol.
Applications in fixed prosthetics and pressed ceramics
Main indications
- Modelling of cervical margins for single crowns.
- Definition of marginal limits on bridges and fixed prosthetic restorations.
- Cervical finishing before investing and metal casting.
- Preparation of wax patterns for pressed ceramic techniques.
- Refinement of cervical areas, chamfers, shoulders and fine finish lines.
Benefits for dental technicians
- Improved margin readability thanks to the transparent burgundy shade.
- Thin application on the die without excess cervical volume.
- Precise finishing with modelling instruments or PKT wax carvers.
- Compatible with classic wax-up, investment, casting and pressing workflows.
- Suitable for everyday work on crowns, bridges and aesthetic restorations.
Recommended use at the wax workstation
Preparation and application
- Prepare the model and check that the cervical finish line is perfectly visible.
- If required, isolate the working area with a suitable wax modelling separator.
- Gradually heat the wax with a Bunsen flame, induction source or electric wax knife.
- Apply a small amount of wax to the cervical margin without overloading the finish line.
Finishing and process control
- Refine the margin with a clean instrument to obtain a continuous cervical contour.
- Check the transition between the cervical wax and the occlusal modelling wax.
- Avoid excess thickness around the shoulder or chamfer area.
- Proceed with investing, casting or ceramic pressing according to the selected protocol.
Cervical wax or standard modelling wax: which should you choose?
GEO Renfert cervical wax
Recommended for marginal limits, cervical edges and fine detail areas. It provides better dimensional stability, clear margin visibility and clean burnout.
Standard modelling wax
Used for main volumes, occlusal morphology, axial walls and general shaping. It complements cervical wax but does not replace it in high-precision marginal areas.
Laboratory tip for more regular cervical margins
To obtain a clean cervical edge, apply the wax in very small quantities and refine it with controlled adjustments.
If the wax is overheated, it becomes too fluid and may obscure the preparation margin.
Progressive heating helps maintain a controlled consistency, ideal for precise marginal adaptation.
For an even more stable workflow, combine this wax with a Renfert Waxlectric electric wax knife, clean PKT instruments and a suitable separator such as Picosep when required by the protocol.
Technical specifications
| Brand | Renfert |
|---|---|
| Product name | GEO Classic Renfert cervical wax |
| Massilia SKU | H100234 |
| Manufacturer reference | 4861000 |
| Type | Hard, organic, tension-free cervical wax |
| Indications | Cervical margins, marginal limits, crowns, bridges, pressed ceramics |
| Colour | Transparent burgundy / transparent red |
| Working temperature | Approx. 58–71 °C depending on the heating method and setting |
| Compatible heating methods | Bunsen burner, induction, electric wax spatula, electric wax knife |
| Behaviour | Very low shrinkage, good dimensional stability, residue-free burnout |
| Packaging | 1 x 75 g wax block with protective cover |
Complementary products for cervical wax modelling
To secure your cervical wax workflow, combine GEO Renfert with precise carving instruments, a stable electric wax knife and a separator compatible with wax and ceramic techniques.
Documents & resources
Application advice
Work the cervical wax in a thin layer and systematically check the continuity of the finish line before investing. This step helps reduce adjustments at the metal, pressing or finishing stage.
Recommended workflow
Clean model, suitable separator, progressive heating, thin application, controlled carving, then investing according to the parameters of the material used in the dental laboratory.
Delivery
Delivery of GEO Classic Renfert cervical wax as a 75 g wax block, supplied with a protective cover.
A practical format for daily use at the wax workstation in dental prosthetic laboratories.
FAQ – GEO Classic Renfert cervical wax
What is GEO Renfert cervical wax used for?
GEO Renfert cervical wax is used to model and adjust the cervical margins of wax patterns.
It helps reproduce the preparation margin with high precision at the cervical area.
It is especially useful for crowns, bridges and restorations intended for casting or pressed ceramic techniques.
Why use cervical wax instead of standard modelling wax?
Cervical wax is formulated for marginal areas, where precision is most critical.
It offers better stability, low shrinkage and excellent readability at the cervical margin.
Standard modelling wax remains useful for volumes, but it is less suitable for very fine finish lines.
Is this wax suitable for pressed ceramic techniques?
Yes, GEO Classic Cervical Wax Renfert is suitable for pressed ceramic workflows.
Its residue-free burnout helps secure the result in fine and marginal areas.
It enables clean wax patterns before investing, pressing or casting according to the laboratory protocol.
How should this cervical wax be heated correctly?
The wax can be heated with a Bunsen flame, an induction source or an electric wax knife.
Progressive heating is recommended to obtain a plastic texture without excessive fluidity.
A controlled temperature allows a thin, regular layer to be placed on the cervical finish line.
Does the transparent burgundy colour provide an advantage?
Yes, the transparent burgundy shade improves visual control of the cervical margin on the model.
It helps distinguish the wax from the preparation and makes it easier to detect excess thickness or missing areas.
This visibility is particularly useful during fine finishing of marginal areas.
Cervical wax contains geo - Modeling with a very low retraction.