[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100649249":3},{"organization":4,"armGroups":7,"interventions":24,"overallOfficials":37,"centralContacts":43,"locations":30,"responsibleParty":52,"collaborators":30,"id":55,"slug":56,"hasResults":57,"nctId":58,"briefTitle":59,"officialTitle":60,"acronym":30,"eligibilityCriteria":61,"healthyVolunteers":62,"sex":63,"minAge":64,"maxAge":65,"enrollmentInfo":66,"targetDuration":30,"studyType":69,"phases":70,"briefSummary":72,"conditions":73,"keywords":76,"overallStatus":85,"whyStopped":30,"lastUpdateSubmitDate":86,"lastUpdatePostDateStruct":87,"startDateStruct":90,"completionDateStruct":92,"leadSponsor":94,"locationsCount":30},{"fullName":5,"class":6},"Minia University","OTHER",[8,14,19],{"label":9,"type":10,"description":11,"interventionNames":12},"Conventional Stainless Steel Fixed Retainer","EXPERIMENTAL","Participants receive a conventional multistranded stainless steel fixed retainer bonded after orthodontic debonding.",[13],"Device: Conventional Multistranded Stainless Steel Fixed Retainer",{"label":15,"type":10,"description":16,"interventionNames":17},"3D-Printed Cobalt-Chromium Fixed Retainer","Participants receive a customized 3D-printed cobalt-chromium fixed retainer bonded after orthodontic debonding",[18],"Device: 3D-Printed Cobalt-Chromium Fixed Retainer",{"label":20,"type":10,"description":21,"interventionNames":22},"3D-Printed Titanium Fixed Retainer","Participants receive a customized 3D-printed titanium (Ti-6Al-4V) fixed retainer bonded after orthodontic debonding.",[23],"Device: 3D-Printed Titanium Fixed Retainer",[25,31,34],{"type":26,"name":27,"description":28,"armGroupLabels":29,"otherNames":30},"DEVICE","Conventional Multistranded Stainless Steel Fixed Retainer","Conventional 0.0215-inch six-stranded stainless steel bonded fixed retainer.",[9],null,{"type":26,"name":15,"description":32,"armGroupLabels":33,"otherNames":30},"Customized 3D-printed cobalt-chromium bonded fixed retainer fabricated from intraoral scans.",[15],{"type":26,"name":20,"description":35,"armGroupLabels":36,"otherNames":30},"Customized 3D-printed titanium (Ti-6Al-4V) bonded fixed retainer fabricated from intraoral scans.",[20],[38,41],{"name":39,"affiliation":5,"role":40},"Salma A daabis, BDS","PRINCIPAL_INVESTIGATOR",{"name":42,"affiliation":5,"role":40},"Ahmed Sh Hashem, Professor",[44,49],{"name":45,"role":46,"phone":47,"phoneExt":30,"email":48},"Salma A Daabis, BDS","CONTACT","+201066600270","salma.daabis@pua.edu.eg",{"name":42,"role":46,"phone":50,"phoneExt":30,"email":51},"+201002024437","ahmedshawkydent@yahoo.com",{"type":40,"investigatorFullName":53,"investigatorTitle":54,"investigatorAffiliation":5,"oldNameTitle":30,"oldOrganization":30},"Salma Daabis","Principle Investigator","100649249","3d-printed-vs-conventional-fixed-retainers-after-orthodontic-treatment-100649249",false,"NCT07730476","3D-Printed vs Conventional Fixed Retainers After Orthodontic Treatment","Comparison Between Three-Dimensionally Printed Fixed Retainers Versus Conventional Multistranded Stainless Steel Fixed Retainers: Randomized Clinical Trial","Inclusion Criteria:\n\n* Age range 21-35 years old after finishing orthodontic treatment.\n* Presence of all maxillary and mandibular anterior teeth with normal shape and size.\n* Completion of orthodontic treatment with full fixed appliances.\n\nExclusion Criteria:\n\n* Patients with cleft lip and\u002For palate or any other craniofacial syndrome\n* Patients with compromised oral hygiene or periodontal disease\n* Patients who had orthognathic surgery\n* Lingual appliance treatments\n* Enamel hypoplasia, fluorosis, active caries, restorations, or fractures in the anterior teeth\n* Patients who had separate arch debondings with a difference of more than 2 months in-between jaws",true,"ALL","21 Years","35 Years",{"count":67,"type":68},36,"ESTIMATED","INTERVENTIONAL",[71],"NA","This randomized clinical trial aims to compare the clinical performance of two types of three-dimensionally printed fixed retainers (Cobalt-Chromium and Titanium Grade 5) with the conventional multistranded stainless steel fixed retainer following orthodontic treatment. Thirty-six participants will be randomly allocated into three parallel groups with a 1:1:1 allocation ratio. The primary outcome is post-treatment stability assessed by Little's Irregularity Index and lower arch dimensions. Secondary outcomes include bond failure rate and periodontal parameters over a 12-month follow-up period.",[74,75],"Orthodontic Relapse","Malocclusion",[77,78,79,80,81,82,83,84],"Orthodontic retention","Fixed retainer","3D-printed retainer","Cobalt-Chromium","Titanium","Multistranded stainless steel retainer","Randomized clinical trial","Little's Irregularity Index","NOT_YET_RECRUITING","2026-07-30",{"date":88,"type":89},"2026-07-31","ACTUAL",{"date":91,"type":68},"2026-08-01",{"date":93,"type":68},"2027-09-01",{"name":5,"class":6}]