Overview

FAQ / Application

Shape and colour

The pre-fabricated COMPONEER shells offer the advantage of identical colour shades, shapes, and surface structures for contralateral pairs of teeth, as intended by nature. Thus, the dentist is provided with a template, which simplifies treatment considerably compared with freehand reconstruction.

Contour Guide

The unique transparent blue Contour Guides permit precise contour conformity, and therefore selection of the correct tooth shape. A total of 30 different shapes is available: 6 per size.

Selection of shades

The shade is selected prior to using the dental dam, as the shade would otherwise change due to dehydration of the tooth.

Shades are selected using the Shade Guide COMPONEER SYNERGY D6, which is based on the SYNERGY D6 product. Placing the dentine sample onto the Universal or White Opalescent enamel shell gives the final shade. The Universal and White Opalescent enamels correspond exactly to the COMPONEER Universal and White Opalescent enamel shades.

Shading

Shading must be handled very individually, depending on the clinical picture. There are many factors that can affect the final result. For example:

  • How far is the enamel shell reduced during the final trimming?
  • What is the basic shade of the existing teeth?
  • How thick is the dentine layer underneath the COMPONEER?
  • How much dental substrate of the teeth to be restored is available initially?
  • Should the prevailing shade of the teeth be retained, or should the final result be brighter than the initial shade?

The procedure does not differ from freehand techniques; in both cases, the missing dental substrate is reconstructed and replaced with the corresponding amount of composite (dentine and/or enamel). It is important for the shade of the treated tooth surface to be homogeneous. All old, discoloured fillings must be removed thoroughly and replaced with new composite. If tooth whitening is desired, the dark shading of the teeth must be bleached beforehand (dark areas cannot be covered completely with composite). As a rule, COMPONEER is bonded with the Universal or White Opalescent enamel shade for a homogeneous transition.

Preparation

COMPONEER:

Preparation is performed in compliance with dentistry guidelines according to the indication, and is as minimally invasive as possible. However, in contrast to indirect veneers, there is no standard guideline for COMPONEER preparation. For example, this means that the preparation edges can be tapered. A flat preparation corresponding to the inside of COMPONEER is advantageous. Cervical reduction allows a greater volume of COMPONEER to be retained.

The proximal point of contact remains basically the same. Although the height of the incisal edge should generally be maintained, it may be reduced somewhat anteriorly if required (the necessity of this alterationis dictated by the clinical picture). When extending the incisal edge, it is recommended that one trim the remaining edge to provide a labial, and particularly a palatal, slanted reduction (to offer resistance). This technique allows for optimal distribution of acting forces and does not weaken COMPONEER.

Conventional and indirect veneers:

Specific preparation guidelines must be complied with. For example, in the case of ceramic veneers, a defined thickness of dental substrate must be prepared to achieve an acceptable thickness of the restoration. The preparation must not have any undercuts.

As in classical filling treatment (freehand modelling), the dentist selects the preparation instruments according to the usual methods. For example, a round end taper, 105µ, is recommended for basic preparation in the anterior region. A football shape with the same grit size can be used for basic palatal or lingual preparation.

Trimming the incisal edge

If the incisal edge corresponds to the natural anatomical tooth shape in neutral occlusion, palatal trimming of the incisal edge is unnecessary with COMPONEER for the following reasons:

  • Today’s adhesion technology enables the composite and bond to develop very high adhesion forces to enamel and dentine .The bond between COMPONEER and the analogue bonding composite to the natural tooth is optimal; the bonding power is significantly higher than for ceramic veneers (see COMPONEER brochure “High bonding values”, page 7). For the same reason, only minimal removal of tooth substance is necessary for a “freehand modelling technique”.
  • COMPONEER offers abrasion values and hardness comparable to natural teeth, which minimises tensile stress in the material. The difference of the material used in ceramic veneers to the material of composite or natural teeth is much greater. For this reason, trimming of the incisal edge is often recommended during the preparation of indirect veneers to reduce impacting forces.
  • COMPONEER is not an indirect or customised veneer. It must be suitable for a variety of clinical cases, or be made to fit with little effort. Therefore, COMPONEER is only the basic shape of the final layer of enamel (without trimming of the incisal edge). Accordingly, preparation is minimally invasive and can be done with tapered edges (as with filling treatment in the anterior region).
  • The following necessary protective measures should be taken in clinical situations with bruxism, parafunction, deep bite, edge-to-edge bite, etc.:
  • - Palatal trimming
    - Grinding of occlusion
    - Protective splint

Extending incisors

When extending the incisal edge, it is recommended that one trim the remaining edge to provide a labial, and particularly a palatal, slanted reduction (to offer resistance). This technique allows for optimal distribution of impacting forces and does not weaken COMPONEER (untapered preparation edges increase the risk of fracture). As a matter of principle, one should proceed according to the guidelines in dentistry. In clinical situations with an increased risk of fractures (i.e., bruxism, parafunction, deep bite, edge-to-edge bite, etc.), the necessary protective measures should also be carried out (e.g., grinding of occlusion, protective splint, etc.).

Discoloured teeth

A) If the objective is to match the shade of the teeth (i.e., in case of severely damaged or discoloured substrate), the natural layer of enamel must be reduced to the dentinal junction. Next, the substrate is fully coated with the appropriate composite-dentine material. Then COMPONEER can be mounted with the appropriate composite-enamel material.

B) Root-treated teeth (dark teeth) can be bleached from the inside and covered with an opaque composite. Then proceed as under point A.

Customisation

COMPONEER:

Customisation of the facial surface of COMPONEER is not required. However, depending on the dentist’s preferences, COMPONEER can be trimmed as desired and the shape can be matched individually (stripping with rotating instruments, coating with composite, or customising with effect finishes).

Conventional and indirect veneers:

Indirect ceramic veneers are customised completely by dental technicians. Interim sessions are always necessary for corrections prior to final placement.

Bonding

How does bonding on the inner side of COMPONEER work if an inhibition layer no longer exists?

  • When the composite cures, the turnover of methacrylate groups is 70%; 30% do not react. Due to the special composition of the One Coat Bond, the non-reacting methacrylate groups can be reactivated and bond to the newly formed radicals on the surface of the composite.

Why is the bond on the inner surface of COMPONEER not polymerised by light?

  • A non-polymerised bond permits better wettability of the composite. The bond tends to pool at the edges (accumulation of bond). This layer becomes visible during pre-curing or placement (interference, overlap). In contrast, non-polymerised bond is distributed evenly by the composite when placing COMPONEER.

As a rule, a polymerised composite surface is sand-blasted for micro-retention. The glass released in this process is activated with silane. COMPONEER already has a micro-retentive surface coated with matrix (i.e. the fillers are already chemically coated). This layer is reactivated chemically with One Coat Bond.

Placement and fixing

COMPONEER:

The composite is always applied to the fixing side of COMPONEER. For concave shapes, the composite is also applied to the tooth to prevent any inclusion of air.

COMPONEER is easy to position using the Placer instrument. As long as the bonding composite has not been light-cured, COMPONEER can be moved into the ideal position. In contrastwithindirectly manufactured ceramic veneers, a trial fitting is unnecessary (which saves time).However, when restoring an entire front, we recommend positioning the two central incisors at the same time to allow optimal adjustment of the tooth axes.

Conventional and indirect veneers:

In most cases, a trial fitting will be required (which will require an additional session).

Fixing COMPONEER to ceramic restorations

COMPONEER can be fixed to existing ceramic restorations. In such cases, the attachment with COMPONEER is principally better than with freehand modelling, as stress and shrinkage are reduced.

Although COMPONEER adheres less well to ceramic than to enamel, the quality of adhesion also depends on the quality of the ceramic.

The following procedure is possible:

  1. Place a dental dam.
  2. Reduce the ceramic by approximately 0.3mm (roughen with a diamond bur); glazing must be removed completely, and the opaquer must not be exposed.
  3. If possible, sandblast with 25-50 aluminum oxide (Al2O3) or Airflow.
  4. Thoroughly rinse and dry the bonding area.
  5. Ideally, use intraoral etching with hydrofluoric acid (HF) for intraoral use (i.e., Porcelain Etch by Ultradent) with special protective measures. It is important to use the HF according to manufacturer’s instructions.
  6. Rinse and dry according to manufacturer’s instructions.
  7. Silanise after conditioning with Porcelain-Etch. Silane by Ultradent is a single-component liquid for application to ceramic surfaces. Silane is a chemical adhesion-promoting agent to improve bonding. Use according to manufacturer’s instructions.
  8. Rinse and dry.
  9. Apply One Coat Bond to the treated ceramic.
  10. Air-clean gently for 20s.
  11. Light-cure for 20s.
  12. Apply One Coat Bond to the inner surface of COMPONEER.
  13. Air-clean lightly.
  14. Apply Synergy D6 composite to COMPONEER and the treated ceramic surface.
  15. Place COMPONEER.
  16. Model the edges and remove any excess composite.
  17. Light-cure.
  18. Finish and polish.

 

IMPORTANT: if the dentist does not want to use HF in the patient’s mouth, point 5 must be substituted by the following procedure:

5)   Etch with 35% etching gel for 30s (i.e., with Etchant Gel S, 35%).

Note: In this case, adhesion force is considerably less than with HF pre-treatment.

Pre-treatment of COMPONEER and the next procedure correspond to the directions for use for COMPONEER.

Trimming, reworking, polishing

COMPONEER: 

COMPONEER can be trimmed easily and efficiently with rotary instruments before and after cementing.

Conventional and indirect veneers:

The reworking and polishing of ceramic veneers is more time-consuming compared with COMPONEER.

Repairs

COMPONEER:

Repairs to COMPONEER are easy and uncomplicated using the bonding system and composite. Using identical materials provides an optimal result.

Conventional and indirect veneers:

Optimal repairs of ceramic veneers are not possible using composite. A new replacement is often necessary.

Replacement of COMPONEER

COMPONEER can be replaced at any time. Careful treatment of the hard tooth substance avoids unnecessary stress on the teeth.

Children and teenagers

COMPONEER can be used as a temporary solution in children and adolescents (e.g., enamel defects, accidents, etc.).