Clinical trials: Staining
Mild Dysplasia of Esophagus, Moderate Dysplasia of Esophagus
Performance of White Light, NBI and Iodine Staining Endoscopy in the Diagnosis of Esophageal Lesions
The investigators aim to evaluate the performance of Narrow Band Imaging (NBI) endoscopy in Esophageal Squamous Cell Carcinoma (ESCC) screening, as compared to the currently used White Light Endoscopy (WLE) and Lugol's Iodine…
- Conditions
- Mild Dysplasia of Esophagus, Moderate Dysplasia of Esophagus, Severe Dysplasia of Esophagus, Carcinoma in Situ of Esophagus
- Trial name
- NCT04170257
- Testing
- Endoscopic examination using white light, NBI and iodine staining
- Where
- 5 sites in China
- Volunteers
- 10,000 people, healthy volunteers welcome
- Sponsor
- Peking University Cancer Hospital & Institute
Tooth Bleaching
Efficacy of Two Sonic Toothbrushes in Reducing Extrinsic Tooth Stain
The objective of the present study was to compare the effects of reduction of extrinsic stains between 2 commercially available Oclean sonic toothbrushes in comparison with an Oral-B manual toothbrush.
- Trial name
- NCT05202093
- Testing
- the Oclean Digital Visual toothbrush (2.16 N·cm torque), Oral B manual toothbrush, the Oclean Sonic Electric toothbrush (1.96 N·cm torque)
- Where
- China
- Volunteers
- 129 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Dry Eye
Clinical Efficacy of Two Topical Dry Eye Drops for Central Corneal Stain Clearing Over 90 Days
This study will be a randomized, double-blind prospective in 3 clinical sites to compare the efficacy of two currently approved topical ophthalmic drops in the clearing central corneal staining in 90 days prior to elective…
- Trial name
- NCT04172961
- Testing
- nanomicellular cyclosporine 0.09%, Lifitegrast
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Toyos Clinic
Corneal Staining
A Clinical Comparison of Marketed Lens Care Solutions With Avaira Lens Brand
This study is a clinical comparison of the biocompatibility of several multipurpose solutions, Renu Fresh, Optifree Replenish, and ClearCare, and saline as a control solution among adapted hydrogel contact lens wearers wearing…
- Trial name
- NCT01335750
- Testing
- Multipurpose Solution #1, Multipurpose Solution #2, Mutlipurpose Solution #3
- Where
- United States
- Volunteers
- 32 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Primary Teeth, Dental Caries
Assessment of Stainless Stain Crowns Placed Using the Hall Technique and Traditional Technique
The purpose of this study is to evaluate and compare the clinical performance of Stainless Stain Crowns Placed Using the Hall Technique and Traditional Technique
- Conditions
- Primary Teeth, Dental Caries, Dentin, Carious
- Trial name
- NCT03433157
- Testing
- Hall technique, Traditional technique
- Where
- Turkey (Türkiye)
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Hacettepe University
Contact Lens Solution Toxicity
The Physiological Consequence of Silicone-hydrogel Care-solution Bio-incompatibility
The purpose of this study is to more objectively evaluate potential lens-material/care solution bio-incompatibilities. We will do this by measuring corneal staining and the amount of fluorescein dye diffusion into the eye.
- Trial name
- NCT00829751
- Testing
- PureVision lenses soaked in ReNu Multiplus, PureVision lenses soaked in OptiFree RePlenish
- Where
- United States
- Volunteers
- 26 people, healthy volunteers welcome
- Sponsor
- Southern California College of Optometry at Marshall B. Ketchum University
Irritable Bowel Syndrome, Digestive System Diseases
Abnormal Expression Proteins, Mitochondrial DNA and miRNA of Irritable Bowel Syndrome
In the investigators study, the investigators will focus on the screening of the related proteins and miRNA to IBS in order to reveal the possible clues or molecular mechanism for this disorder.
- Conditions
- Irritable Bowel Syndrome, Digestive System Diseases, Gastrointestinal Diseases, Intestinal Diseases
- Trial name
- IBS (NCT01028898)
- Volunteers
- 180 people, healthy volunteers welcome
- Sponsor
- Chinese PLA General Hospital
Tooth Whitening, Tooth Discoloration
Clinical Research Study to Evaluate Stain Removal and Whitening Improvement
The objective of this clinical research study is to evaluate the stain removal and whitening improvement of a toothpaste containing Vitamin C and 1100 ppm F as sodium fluoride as compared to a matching placebo toothpaste…
- Trial name
- NCT07870018
- Testing
- Vitamin C toothpaste
- Where
- United States
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Colgate Palmolive
Bacterial Vaginosis
PNA FISH, PCR and Gram Staining for Detection of Bacterial Vaginosis - a Comparative Clinical Study in a Danish IVF Setting
The primary aim of the present study is to investigate the vaginal microbiota of infertile women with two novel molecular based diagnostic tests for Bacterial Vaginosis, a PNA FISH and a PCR method supported with conventional…
- Trial name
- NCT02042352
- Testing
- pH glove
- Where
- Denmark
- Volunteers
- 195 people, healthy volunteers welcome
- Sponsor
- Regionshospitalet Viborg, Skive
Tooth Discoloration, Tooth Staining
Effectiveness of Dental Bleaching Using Different Designs of 3D-Printed and Conventional Customized Nightguards
This randomized, double-blind, split-mouth clinical trial evaluates the effectiveness of at-home dental bleaching using customized nightguards fabricated by digital (3D-printed CAD-CAM) and conventional methods, with and without…
- Trial name
- NCT07464197
- Testing
- Customized bleaching tray fabrication, Reservoir tray design, Carbamide peroxide 10%
- Where
- Spain
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Universitat Internacional de Catalunya
Tooth Staining, Periodontitis
Impact of a Newly Formulated Toothpaste in Tooth Staining Associated With Chlorhexidine Rinses
Dental staining may interfere with compliance with chlorhexidine mouth rinse use Thus, developing strategies to control tooth staining associated with chlorhexidine use may be relevant for improving compliance.
- Trial name
- PaSTaining (NCT05354986)
- Testing
- Toothpaste with hexametaphosphate, tripolyphosphate and polyvinylpyrrolidone (PVP), Toothpaste without hexametaphosphate, tripolyphosphate and polyvinylpyrrolidone (PVP)
- Where
- Spain
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Universidad Complutense de Madrid
Healthy
Testing Performance and Usability of Q300 Device
A data collection clinical study performed on live human spermatozoa samples. Spermatozoa are imaged by QART Q300TM microscopy system. For the feasibility 1st phase of the study, up to 75 donors are expected to participate.
- Trial name
- NCT04901572
- Testing
- QISI device
- Where
- 4 sites in Israel
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- QART Medical
Teeth Color, Teeth Staining
A Clinical Study to Evaluate the Stain Reduction Efficacy of a Non-Fluoride Tooth Whitening Dentifrice Containing Nano-Hydroxyapatite (nHAP) and a High Cleaning Silica Abrasive System Compared to a Commercial Fluoride Non-Whitening Dentifrice as a Negative Control
To determine whether brushing with a non-fluoride tooth whitening dentifrice containing nHAP and a high cleaning silica system produces a greater level of stain reduction as indicated by the Modified Lobene Stain Index (MLSI) for…
- Trial name
- NCT07214038
- Testing
- toothpaste
- Where
- India
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Boka LLC
Aligner Staining
Cleaning Agents Impact on Invisalign Aligners: A Cross-Over Randomized Trial
Today, the increasing aesthetic expectations of the patients, showing its effect in the field of orthodontics, leads to the orientation towards aesthetic materials.
- Trial name
- İnvisalign (NCT05213650)
- Testing
- non-abrasive toothpaste, abrasive toothpaste, Efferdent
- Where
- Turkey (Türkiye)
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Bezmialem Vakif University
Whitening
Efficacy of a Toothpaste Containing Hydrogen Peroxide as Compared to a Regular Fluoride Toothpaste Without Hydrogen Peroxide in the Immediate Removal of Tooth Stains After a Single Brushing.
The aim of this study is to evaluate and compare the immediate efficacy of a hydrogen peroxide-containing toothpaste versus a regular fluoride toothpaste without hydrogen peroxide in removing extrinsic tooth stains following a…
- Trial name
- NCT07276672
- Testing
- Optic White Adv Sparkling White (2%HP) Toothpaste, Colgate Great Regular Flavor Toothpaste
- Where
- Dominican Republic
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Colgate Palmolive
Black Stains
A Crossover Clinical Study to Evaluate the Effect of Chitosan Mouthwash on Recurrence of Black Stains in Pediatric Patients
The goal of this clinical trial is to learn if Chitosan mouthwash works to affect the recurrence of black stains in pediatric patients.
- Trial name
- NCT06714695
- Testing
- Chitosan
- Where
- Egypt
- Volunteers
- 17 people, healthy volunteers welcome
- Sponsor
- Al-Azhar University
Sperm DNA Impact on ART Outcomes
Impact of Sperm DNA Integrity on Artificial Reproductive Treatment (ART)
The purpose of this study is to establish a new criteria with which to judge the quality of sperm samples submitted for artificial reproductive treatments.
- Trial name
- NCT00875095
- Where
- United States
- Volunteers
- 8 people, healthy volunteers welcome
- Sponsor
- Northwell Health
Tooth Discoloration, Tooth Staining
Peroxide Versus Non-Peroxide In-Office Tooth Bleaching
This randomized clinical trial aims to compare the effectiveness of peroxide and non-peroxide in-office tooth bleaching systems.
- Trial name
- BECTS (NCT07818031)
- Testing
- peroxide -based in office tooth bleaching, non-peroxide -based in office tooth bleaching
- Where
- Egypt
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Minia University
Contact Lens-induced Corneal Fluorescein Staining
Corneal Staining and Physiological Compromise After Eight Hours of Soft Contact Lens Wear
The purpose of this study is to assess corneal staining and to measure the relative corneal epithelial "barrier" function (the degree to which the cornea can prevent penetration of colored sodium fluorescein dye into the eye)…
- Trial name
- NCT01015768
- Testing
- ReNu Multiplus multipurpose disinfecting solution, Control
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Southern California College of Optometry at Marshall B. Ketchum University
Esthetic Restorations
Effect of One-step Versus Multistep Polishing Protocol on Class IV Composite Restorations.
This study aims to evaluate the effectiveness of various finishing and polishing techniques for composite resins used in dental restorations, with a focus on minimizing discoloration and surface roughness over time.
- Trial name
- NCT06732115
- Testing
- One-step polishing system with nanohybrid resin composite restorations., Multistep system polishing system Super-Snap X-treme (Shofu) with nanohybrid resin composite restorations.
- Where
- Egypt
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Cairo University