Clinical Evaluation of Single Versus Multi-Shade Direct Composite Resin Veneers

Tooth Discoloration Clinical Trial

Official title: Clinical Evaluation of Single Versus Multi-Shade Direct Composite Resin Veneers

Status Completed

Clinical Trial Summary

The aim of this study was to clinically evaluate the single versus multi-shade direct composite resin veneers.

Clinical Trial Description

For several decades, growing demands have boosted the use of direct resin composites in esthetic restorative dentistry. The recent advances in adhesive dentistry have resulted in the development of materials and techniques for restoring the natural teeth appearance, particularly in the anterior region. The introduction of more esthetic and natural tooth structure mimicking materials can enable the clinicians to imitate the natural dental tissues to produce very natural-looking restorations.

Many clinical issues such as tooth discoloration, extensive fractures, misaligned teeth and carious lesions may cause an important impairment in esthetic appearance and smile harmony which ultimately impacts the quality of life. The use of direct composite resin veneers may be a fascinating option to recover the esthetic appearance of damaged teeth as they actually allow the operator to monitor and assess the entire restorative procedure from shade selection to final morphology.

Direct veneering with composite resins involves applying resin directly to the prepared tooth surfaces and artistically sculpting them to rectify aesthetic defects of color, anatomy, and morphology. Direct composite veneering has many advantages, such as being a chair-side technique, not requiring multiple appointments or luting agents, being minimally invasive, preserving natural tooth structure, being easily repaired and cost-effective due to no laboratory costs were involved. In addition, they have similar abrasion rates as those of natural tooth structures.

The color variation of natural teeth prompted manufacturers to fabricate composite resins with several shades, frequently utilizing the Vita Classical shade guide as a reference. Moreover, resin composites are available in a wide range of opacities, usually named dentin, body or opaque, and enamel or translucent. They seek to emulate dentin and enamel's optical characteristics, which are indicated for different areas of the tooth.

The layering technique for resin composite restorations has been recommended since 1980. In order to mimic the optical features of a natural tooth; this procedure involves the use of composites with different chroma and opacities for each layer. Even while the layering technique has been proven to yield satisfactory results for color matching, this approach is much more complex than a regular two or one shade technique, requiring excellent restorative skills and an extended chair-side time.

Composite materials and restorative techniques that enable the use of streamlined clinical protocols are highly desirable among clinicians in order to save chair time, minimize technique sensitivity and enhance the final aesthetically pleasing results. Since color selection might be challenging and subjected to environmental and operator-dependent variables, a tendency to simplify shade selection has resulted in the fabrication of so-called universal composites. These composites have a universal opacity and few Vita shades available, being recommended by developers to be used in a single shade increment that may be able to match varying tooth shades.

Recently, smart chromatic technology was employed to develop OMNICHROMA, a unique single-shade resin restorative composite that has 260 nm spherical fillers and a similar appearance to the surrounding tooth structure. Its broad color matching ability may eliminate the need for a shade assessment procedure and reduce the inventory of resin composites, enabling clinicians to reduce chair time, the wastage of unused resin composite shades, and their reliance on shade selection techniques.

Clinical testing of the restorative materials is crucial to determine their durability when compared to in vitro screening. Even with meticulously designed simulations of clinical circumstances in vitro tests, the conditions differ markedly from those in vivo. In the oral cavity, several interactive clinical variables pertaining to the tooth substrate and oral environment such as the outward flow of fluids through the dentinal tubules, the surface tension and others which cannot be simulated with in vitro tests. The null hypothesis of this study is that there is no significant difference in the clinical performance between single versus multi-shade direct composite resin veneers ;

Related Conditions & MeSH terms

• Tooth Discoloration

• NCT number: NCT06404398
• Study type: Interventional
• Source: Tanta University
• Status: Completed
• Phase: N/A
• Start date: July 19, 2022
• Completion date: April 9, 2024