Fracture Load of Veneered Zirconia Restorations is affected by the Number of Firings

Katrin Zumstein*

Department of Prosthodontics and Periodontology, University of Campinas-Piracicaba Dental School, Piracicaba, Brazil

*Corresponding Author:
Katrin Zumstein
Department of Prosthodontics and Periodontology, University of Campinas-Piracicaba Dental School, Piracicaba, Brazil
E-mail:Zumstein_K@Med.Br

Received date: August 26, 2022, Manuscript No. IPJDCR-22-15059; Editor assigned date: August 29, 2022, PreQC No. IPJDCR-22-15059 (PQ); Reviewed date: September 12, 2022, QC No. IPJDCR-22-15059; Revised date: September 22, 2022, Manuscript No. IPJDCR-22-15059 (R); Published date: September 29, 2022, DOI: 10.36648/2576-392X.7.5.121

Citation: Zumstein K (2022) Fracture Load of Veneered Zirconia Restorations is affected by the Number of Firings. J Dent Craniofac Res Vol.7 No.5: 121.

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Description

A veneer is a layer of material applied to a tooth in dentistry. A smile's aesthetics can be enhanced and the tooth's surface protected from damage with veneers. When making a veneer, two main types of material are used: Porcelain dental composite. A composite veneer can either be fabricated by a dental technician in a dental lab and later bonded to the tooth, typically with resin cement, or it can be directly placed (built up in the mouth). Typically, they are used to treat adolescents who will need a more durable design when they are fully grown. A composite veneer has a lifespan of about four years, while a porcelain veneer can only be made indirectly. A restoration that covers all coronal tooth surfaces (mesial, distal, facial, lingual, and occlusal) is called a full veneer crown. On the other hand, laminate veneer is a thin layer that only covers the surface of the tooth and is typically used for aesthetic reasons. These typically perform better and look better, and they are less likely to retain plaque.

Cosmetic Dentist

The cosmetic dentist only prescribes veneers as a prosthetic device. A dentist may use one veneer to restore a single tooth that has been fractured or discolored, a high-quality veneer to create a big, bright "Hollywood" smile makeover, or multiple veneers on the upper arch. Many people have gaps between their teeth that may not be easy to close with orthodontic treatment. Some people's teeth have worn away at the edges, giving them a prematurely aged appearance, while others may have crooked or misaligned teeth. Dentists also recommend using thin porcelain veneers to strengthen worn teeth. They are also applied to yellow teeth that will not whiten. Multiple veneers can close these spaces, lengthen teeth that have been shortened by wear, fill the black triangles between teeth caused by gum recession, provide a uniform color, shape, and symmetry and make the teeth appear straight. Patients who are getting older and have worn teeth can benefit from thin veneers. When using porcelain veneers, tooth preparation is typically minimal or non-existent in many instances. The dentist can make temporaries, typically made of composite, during the preparation phase, which takes place between the veneer's prep and fit appointments. These are not usually recommended, but they can be used if the patient is complaining of sensitivity or aesthetics. One of the most prominent cosmetic dentists in Beverly Hills. The temporaries play a crucial role in the design and finalization of the final veneers' aesthetics. Temporaries assist both the patient and the dentist in selecting the appropriate veneer color, length, and shape.

When an adolescent or young adult with otherwise healthy teeth only requires whitening or more frequent cleanings, some cosmetic dentists may push unnecessarily for prosthodontic treatment. Sensitivity and decay will still be issues even if veneers are applied correctly because sometimes shaving the tooth is necessary for preparation. Additionally, the cost of veneer maintenance can be prohibitive for many people. Individuals who do not qualify for a crown or full replacement and have significant aesthetic issues, such as severely cracked or broken teeth, should only have veneers placed. The following are additional contraindications, but are not limited to: Poor oral hygiene, uncontrolled gingival disease, a high rate of cavities, parafunction, no enamel, patient expectations that are too high and large restorations that are already in place porcelain laminate veneers can be prepared in four basic ways: Window, feather, bevel, and incisal overlap. Ultra-thin porcelain laminate veneers can now be made thanks to recent technological advancements. The tooth structure is only minimally or completely removed in some cases when these veneers are used. These veneers are frequently referred to as "non-prep."

Poly Methyl Methacrylate

It originated from the ancient art of making pottery, in which primarily clay was fired to create a brittle, hard object; a material with metallic and non-metallic elements (usually oxygen) is a modern definition. Because of the ionic and covalent structure of their inter-atomic bonding, these materials can be identified by their inherent characteristics, which include being rigid, brittle and hard. Metals, on the other hand, are non-brittle (they behave elastically) and ductile (they behave plastically) because of the nature of their inter-atomic metallic bond. A cloud of shared electrons that are able to move easily when energy is applied defines these bonds. The opacity of ceramics can range from very transparent to very opaque. In general, a microstructure that is less crystalline and more glassy will appear more translucent, while one that is more crystalline will appear more opaque.

Ceramic restorations can be made on a metal coping or core or a refractory die, which is a replica of a prepared tooth made of a strong material that can with-stand high temperatures. In ceramic-fused-to-metal restorations, the metal's black color is first covered with an opaque layer that gives it the appearance of white before subsequent layers are added. Before firing, water is mixed with the powder that matches the desired shade of dentine base. To replicate the tooth's natural transparency, additional layers are added. For extra strength, the porcelain is fused to a precious or semi-precious metal, like gold.

Glazing is the final step in sealing the surface, filling in any gaps and preventing wear on adjacent teeth. Glazing is necessary to create a smooth surface. Glazing can be accomplished by using glazes with lower fusing temperatures or by refiring the restoration, which fuses the outer layers of the ceramic; these are applied in a thin layer to the restoration's outer surface. After that, polishing rubbers and fine diamonds are used to make any adjustments. Denture teeth are typically made of Poly Methyl Methacrylate (PMMA), but ceramic denture teeth have also been and continue to be used for this purpose. Ceramic teeth superior wear resistance is the main advantage of using them. However, ceramic denture teeth have a number of drawbacks, one of which is that they are unable to form chemical bonds with the PMMA denture base; Instead, ceramic teeth are held in place by mechanical retention, which increases the likelihood of debonding over time as the teeth are used. Due to their brittle nature, they are also more likely to break.

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