View clinical trials related to Tooth Discoloration.
Filter by:Conservatism is considered the main concern in any treatment plan, the feather edge preparation design of laminate veneers have been introduced yet clinical studies are lacking to evaluate their clinical performance.The aim of this study is to evaluate the effect of the two different preparation designs on the functional and esthetic outcome of laminate veneers in terms of marginal adaptation, retention, fracture, marginal discoloration and patient satisfaction
Visual shade matching is the most common method, in which a color standard from a commercially available dental shade guide is compared to and matched with the target tooth. However, several factors can contribute to perception errors including: different lighting variables, multiple shade systems available in the market with lack of standardization in color systems and corresponding porcelain systems, individual human variables in color perception and lack of understanding of color science. Therefore, in order to eliminate the uncontrolled variables during the color matching process, instrumental methods have been developed. Spectrophotometric measurement methods employing computer calculations, based on color science and theories, allow quantitative evaluation which is objective and appears to be more accurate. However, extremely high costs, relatively low performance with respect to agreements of the computer-aided devices, and edge loss error make it less acceptable. One of the most powerful tools in communicating with both patients and dental ceramists is digital photography. Hence, this study is designed to explore the possibilities of a novel approach to shade management (eLABor_aid) utilizing a photocolorimetric (PCM) method and subsequent shade formulation without the use of stock shade guides in comparison to well-known visual and instrumental methods. The aim of the study is to evaluate the accuracy of digital photography combined with shade analyzing software (eLAB) in optimizing shade matching when compared to conventional and instrumental methods of shade selection. A Null Hypothesis is suggested where no significant difference regarding shade selection between eLAB protocol, conventional and instrumental methods will be found.
Although black staining is considered a drawback that is clinically observed following SDF application and is the main primary barrier for its use clinically . Child's behaviour and cooperation cannot be controlled at a young age or in special health care needs cases. Therefore, the best treatment modality will always be a simple, fast and painless procedure and SDF is the best solution for those cases. Discolouration caused researchers to search for a solution that will reduce or prevent discolouration using KI and GSH. A systematic review was conducted in-vitro, and it showed the use of SDF with KI had reduced stains markedly, potential advantages of minimal staining might be advantageous, along a short period. However, studies with long-term follow-up would be required to provide evidence-based guidelines for using SDF and KI formulations in routine clinical practice
To clinically compare the effects of LED- or Diode laser-activated bleaching on colour change, tooth-sensitivity, gingival-irritation and temperature variation over 9-months. Thirty-five patients with tooth colour A2 or higher will be included in the study. In a split-mouth design, using a 35% HP bleaching agent (Whiteness HP); one side of each mouth will be randomly activated by a diode laser (Epic X) and the other side by an LED (Radii Plus) light-source. During bleaching, the temperature variations will be recorded using a thermocouple from the buccal surface of canine teeth. Colour change (ΔSGU, ΔE) will be evaluated by subjective (Vita classic/bleached guide) and objective methods (spectrophotometry) before treatment and immediately, 48h, 1 week, 1, 6, 9 months after. Tooth-sensitivity and gingival- irritation will be assessed by visual analogue scale (VAS) and Gingival Index.
The aim of this study was to evaluate the survival of laminate veneers constructed using a recent polymer-infiltrated ceramic network material following the aesthetic pre-evaluative temporary (APT) technique of tooth preparation in comparison to traditional technique.
The increasing demand for whitening teeth necessitates requirements and guidelines to ensure the efficacy of products and bleaching techniques. So far there is no comparative study to evaluate the effectiveness of pre-operative air-powder polishing device (APD) and rubber-cup prophylaxis on tooth bleaching in-office. Office-bleaching has some advantages such as avoiding soft tissue irritation, preventing the use of excess material and producing immediate esthetic results. The aim this study is to compare the effects of pre-operative air-powder polishing and rubber-cup prophylaxis on tooth bleaching outcomes. The null hypothesis of this research was that there would be no difference in the change in according to the type of prophylaxis on tooth-bleaching outcomes.△L,△a,△b,△E and △SGU. The results of the study show that both rubber cup prophylaxis and APD devices can be equally used before bleaching treatment as there were no statistical differences in color change.
Vital pulp therapy including pulpotomy is commonly used for managing teeth with carious pulp exposure instead of performing root canal therapy. The gold standard materials used in this procedure are the calcium silicate based materials, however recent case reports have shown tooth discoloration caused by these materials especially MTA which is of concern to the patients. The aim of this study is to compare tooth color changes and discoloration induced by 3 calcium silicate based materials used in pulpotomy over 6 months, 12 months and yearly up to 5 years.
Having an aesthetic smile has become very common among patients today. Recent studies have shown that people aged 18-49 want to have whiter and brighter teeth. The demand for whitening has increased by 300% in the last 5 years. New materials and equipment have been developed to meet this demand, and various whitening techniques have been developed for use at home and in clinical practice. Determination of color in dentistry; It can be divided into two categories with the help of visual and computer-aided devices. Eye color determination is the most widely used method during the construction of a indirect restoration. The evaluation of tooth color by eye is quite subjective. Physiological variables such as external light source, experience, age and human eye fatigue, color blindness cause inadequate results. Due to interpersonal detection differences during color perception, the lack of standardization in the determination of tooth color can be improved with the use of computer-aided devices such as spectroradiometer, spectrophotometer, colorimeter and with the help of film-based photographs and digital photographs. Spectrophotometric approach; the point of view is interesting, as it allows for an objective application, regardless of the practitioner's experience. The color selection made with the use of these devices provides a potential advantage over the color selection made with the eye. Because these measurements are objective, can be counted and can be obtained faster. Although widespread uses of computer aided colorimeters and spectrophotometers have been reported in dental studies, most devices are not suitable for routine clinical use. Color analysis with these computer-aided devices may cause inaccurate results especially in the evaluation of translucent objects such as teeth. Therefore, a combination using both eyes and devices should be used.
This is a 30 day randomized, parallel comparative trial where participants with tooth shade of C2 or darker will be assigned to one of five groups. The participants will be evaluated for the difference in tooth shade, as determined by the digital VITA Easyshade V (provided by GLO) before the respective whitening regimen (baseline), immediately following the treatment period, and at 30 days (~4 weeks) from end of the treatment intervention.
Objective: The purpose of this randomized controlled split-mouth clinical trial was to evaluate the effectiveness of MI paste in reducing sensitivity associated vital bleaching. Methods: 45 subjects were randomly divided into two groups, based upon which arch received MI Paste. Group 1 bleached Maxillary arch, Group 2 bleached mandibular arch. Two weeks later subjects stopped bleaching the first arch and started second arch. Sensitivity was measured by VAS daily log scale for two weeks. Shade was taken with colorimeter and Classic Vita shade guide at baseline, immediate post-bleaching, and two weeks post-bleaching. Longitudinal sensitivity over the 14 days period of bleaching was summarized. The Wilcoxon Signed Rank test was used to compare summary measures.