[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"discoloration-tooth\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:discoloration-tooth":27},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,3,0,[8,40,63],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":13,"acronym":4,"eligibilityCriteria":14,"healthyVolunteers":15,"sex":16,"minAge":17,"maxAge":18,"enrollmentInfo":19,"targetDuration":4,"studyType":22,"phases":23,"briefSummary":25,"conditions":26,"keywords":4,"overallStatus":28,"whyStopped":4,"lastUpdateSubmitDate":29,"lastUpdatePostDateStruct":30,"startDateStruct":33,"completionDateStruct":35,"leadSponsor":37,"locationsCount":4},"100560816","bleaching-effect-of-solo-and-combined-kiwi-extract-and-ozone-and-their-impact-on-enamel-100560816",false,"NCT06582069","Bleaching Effect of Solo and Combined Kiwi Extract and Ozone and Their Impact on Enamel","Inclusion Criteria:\n\n* A total of the 40 participants aged between (18-35 years) with no gender prediction.\n* The participation will be entirely voluntary, and a signed statement of informed consent will be obtained prior to the start of the study.\n* Systemically healthy subject based on medical and drug histories, a subject requiring scaling and polishing with moderate calculus with at least two non-adjacent hypersensitive teeth with Schiff scale scores \\>1 with air blast stimulus.\n* Access to sound maxillary anterior teeth.\n* Vitapan classical shades should be A3 or darker and lighter shades are not included.\n\nExclusion Criteria:\n\n* Participants with poor oral hygiene.\n* Participants with missing anterior teeth.\n* Participants with unrealistic expectations.\n* Participants with dental caries, those undergoing orthodontic treatment.\n* Participants with a history of periodontal treatment, pregnant or lactating women and individuals with a history of asthma.\n* Those who are allergic to kiwi or ozone skin therapy were excluded from the study.\n* Smokers are excluded from the present study.",true,"ALL","18 Years","35 Years",{"count":20,"type":21},40,"ESTIMATED","INTERVENTIONAL",[24],"NA","ozone therapy has been extensively used in dentistry to manage wounds healing, dental caries, oral lichen planus, gingivitis and periodontitis, halitosis, osteonecrosis of the jaw, post-surgical pain, plaque and biofilms, root canal treatment, dentin hypersensitivity, tempro-mandibular joint disorders and teeth whitening, And based on the above, in this study kiwi extract and ozone gas will be used individually and combined to evaluate the resultant effects on bleaching, enamel microhardness and micromorphology.",[27],"Discoloration, Tooth","NOT_YET_RECRUITING","2024-08-30",{"date":31,"type":32},"2024-09-03","ACTUAL",{"date":34,"type":21},"2024-09-01",{"date":36,"type":21},"2026-01-01",{"name":38,"class":39},"Al-Azhar University","OTHER",{"id":41,"slug":42,"hasResults":11,"nctId":43,"briefTitle":44,"officialTitle":45,"acronym":4,"eligibilityCriteria":46,"healthyVolunteers":11,"sex":16,"minAge":47,"maxAge":48,"enrollmentInfo":49,"targetDuration":4,"studyType":51,"phases":4,"briefSummary":52,"conditions":53,"keywords":4,"overallStatus":28,"whyStopped":4,"lastUpdateSubmitDate":54,"lastUpdatePostDateStruct":55,"startDateStruct":57,"completionDateStruct":59,"leadSponsor":61,"locationsCount":4},"100555705","prevalence-of-teeth-discoloration--associated-risk-factors-and-the-most-common-shade-among-group-of-egyptian-population-100555705","NCT06515561","Prevalence of Teeth Discoloration , Associated Risk Factors and the Most Common Shade Among Group of Egyptian Population","Prevalence of Teeth Discoloration and Associated Risk Factors and Determination of the Most Common Shade Among Group of Egyptian Population: Educational Hospital Based Cross Sectional Study","Inclusion Criteria:\n\n* Age 20-45 years.\n* Males or females.\n* Egyptians.\n* Presence of at least 20 teeth in function.\n* Patient compliance.\n\nExclusion Criteria:\n\n* Psychologically unstable or mentally retarded participants\n* Participants with severe periodontal diseases.\n* Participants in need for emergency intervention","20 Years","45 Years",{"count":50,"type":21},213,"OBSERVATIONAL","\"The aim of this study is to assess the prevalence of tooth discoloration and explore its associated risk factors, including local cultural practices or environmental conditions, among a group of adults aged 20 to 45 years in an Egyptian population sample. Moreover, we aim to identify the most common dental shades in the same sample.\"",[27],"2024-07-23",{"date":56,"type":32},"2024-07-24",{"date":58,"type":21},"2024-08",{"date":60,"type":21},"2025-09",{"name":62,"class":39},"Cairo University",{"id":64,"slug":65,"hasResults":11,"nctId":66,"briefTitle":67,"officialTitle":68,"acronym":4,"eligibilityCriteria":69,"healthyVolunteers":11,"sex":16,"minAge":47,"maxAge":70,"enrollmentInfo":71,"targetDuration":4,"studyType":22,"phases":73,"briefSummary":74,"conditions":75,"keywords":4,"overallStatus":79,"whyStopped":4,"lastUpdateSubmitDate":80,"lastUpdatePostDateStruct":81,"startDateStruct":83,"completionDateStruct":85,"leadSponsor":87,"locationsCount":88},"100425257","dental-photography-and-numeric-shade-quantification-as-a-substitute-to-conventional-and-instrumental-shade-matching-techniques-in-the-esthetic-zone-100425257","NCT04817579","Dental Photography and Numeric Shade Quantification as a Substitute to Conventional and Instrumental Shade Matching Techniques in the Esthetic Zone","Dental Photography and Numeric Shade Quantification as a Substitute to Conventional and Instrumental Shade Matching Techniques in the Esthetic Zone: A Controlled Clinical Trial","Inclusion Criteria:\n\n1. Age range of the patients from 20-50 years old; able to read and sign the informed consent document.\n2. Patients able physically and psychologically to tolerate conventional restorative procedures.\n3. Patients with no active periodontal or pulpal diseases, having teeth with good restorations.\n4. Patients with teeth problems indicated for full coverage restoration (e.g. moderate discoloration, coronal fracture where partial coverage would lack retention, mal-posed or malformed teeth, esthetics enhancement of previously placed crown) where the contralateral\u002Fadjacent tooth is present.\n5. Patients with root canal treated teeth requiring full coverage restorations even if they need fiber post and core fabrication first.\n\nExclusion criteria are:\n\n1. Patients with poor oral hygiene and motivation.\n2. Patients with teeth with increased incisal translucency.\n3. Patients with severe discolored teeth.\n4. Patients with smoking habits.\n5. Patients with excessive consumption of coffee or tea.\n6. Pregnant women to avoid any complication that may occur in dental office due to pregnancy or due to injected anesthetic solution.\n7. Patients with psychiatric problems or unrealistic expectation (patient that has phobia from dental treatments or needle injection).\n8. Patients suffer from para-functional habits.","50 Years",{"count":72,"type":21},10,[24],"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.\n\nTherefore, 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.\n\nOne 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.\n\nThe 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.\n\nA Null Hypothesis is suggested where no significant difference regarding shade selection between eLAB protocol, conventional and instrumental methods will be found.",[27,76,77,78],"Chip Tooth","Non Vital Teeth","Trauma Dental","RECRUITING","2024-06-23",{"date":82,"type":32},"2024-06-25",{"date":84,"type":21},"2024-07",{"date":86,"type":21},"2024-12",{"name":62,"class":39},1]