Crown, Veneer Lumineer, those are strange terms that one can come across, or hear at the dental office. What are they?
They are actually methods of preserving / restoring a tooth.
A crown is a prosthetic restoration used to entirely cover or cap a damaged tooth. Besides strengthening a damaged tooth , a crown can be used to improve its appearance, shape or alignment. A crown can also be placed on top of an implant to provide a tooth like shape and structure for function.
Your dentist may recommend a crown to
- replace a large filling when there isnt enough tooth remaining.
- protect a weak tooth from fracturing
- restore a fractured tooth
- attach a bridge
- cover a dental implant
- cover a tooth that has had a root canal treatment.
How a crown is fit
Visit 1. On your first visit to the dentist, the tooth is prepared and an impression is taken.
- step1 : After numbing the area the dentist trims some tooth structure ,just enough to provide space for the crown to fit in. This is also done to provide adequate strength and give room for proper shape.
- Step2: After the tooth is reshaped and impression is taken by the dentist.
- Step 3: Shade selection with your dentist, to make sure that it looks as natural as possible , similar to remaining teeth
- Step 4: A temporary tooth is made on the chair to replace the tooth while the impression is being sent to the laboratory.
- On your second visit, the temporary tooth is removed.
- The permanent crown is fitted, and occlusion is tested using an articulation paper.
- Once both doctor and patient is satisfied, the crown is cemented tp the tooth.
Crowns can be of different materials such as metal , ceramic or ceramic over metal.
Dental Veneer are tiny shells of porcelain that are custom made to fit over teeth providing a natural attractive look. they can be used to fix chipped stained misaligned worn down uneven or abnormally spaced teeth. Veneers are difficult to stain , making them popular for people seeking a perfect smile while keeping as much sound tooth structure as possible.
Procedure for getting a veneer
Getting a veneer usually takes 3 sittings with the dentist.
The first one is consultative where a dentist examines the teeth to make sure if it is appropriate and discuss the procedure and planning .
If a different shape is desired like the case I am working on at the moment, then at first appointment an impression is taken for study model and sent to the laboratory and a wax up is made.
At second appointment, if the patient validates the projected result, the dentist will shave a little bit of enamel from the tooth surface. This will be equal to the thickness of the veneer that will be added on the tooth. Next an impression will be taken and sent to the dental laboratory where a the prosthesist will fabricate the veneer. The dentist will put a temporary veneer on your tooth. And you will be recalled in about a week time.
After a week, the temporary veneer is removed and the permanent veneer is cemented. The dentist will tell you a list of precautions to be taken.
Lumineers on the other hand are very very thin shell like structures placed on the teeth without the need of shaving the tooth. This is done in very specific cases. And very few laboratories do it in the Indian Ocean do it.
Personally the laboratory I send my works to do Emax Veneers.
IPS e.max Lithium Disilicate
Lithium disilicate (LS2) glass-ceramic is ideally suitable for the fabrication of monolithic restorations or veneered restorations in the anterior and posterior region. Due to its natural-looking tooth colouring and excellent light-optical properties, this material produces impressive results.
Years of clinical experience
The material is used in the dental laboratory in conjunction with either press or CAD/CAM technology. Years of clinical experience confirm the high strength of 500 MPa* for IPS e.max lithium disilicate. The outstanding performance of the material is based on a combination of excellent flexural strength and high fracture toughness adjusted to the given dental requirements. The clinical success of the material attests to its quality. Furthermore, these properties allow you to work according to the requirements of conservative dentistry. Depending on the patient situation, the restorations may be veneered in a highly esthetic manner or, if fabricated as monolithic restorations, they will be stained.
Patients with devitalized teeth
Even if the preparations demonstrate a dark shade (e.g. as a result of discolouration or titanium abutments), all-ceramic restorations may be used. In this case, it is important for you to inform your laboratory about the die shade, and the dental technicians then selects the IPS e.max lithium disilicate material in the required opacity in order to design the true-to-nature esthetic appearance.
- Veneers (≥ 0.3 mm)
- Inlays and onlays
- Occlusal veneers, partial crowns
- Minimally invasive crowns (≥ 1 mm)
- Implant superstructures
- Hybrid abutment solutions
- Three-unit bridges up to the second premolar as the terminal abutment
- Excellent esthetics and high strength (500 MPa*)
- Versatile applications and extensive indication range
- Minimally invasive preparation and adhesive cementation of crowns with a layer thickness of 1 mm
- Clinical long-term success and scientifically documented results
- Natural-looking esthetics irrespective of the preparation shade
- Adhesive, self-adhesive or conventional cementation depending on the indication
* Mean biaxial flexural strength (IPS e.max CAD 530 MPa, IPS e.max Press 470 MPa). Source: R&D Ivoclar Vivadent, Schaan, Liechtenstein
Below are more information about the materials used. Please do not hesitate to contact me if you have more questions.