[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"fixed-orthodontic-retainer\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:fixed-orthodontic-retainer":27},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,2,0,[8,49],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":13,"acronym":14,"eligibilityCriteria":15,"healthyVolunteers":11,"sex":16,"minAge":17,"maxAge":18,"enrollmentInfo":19,"targetDuration":4,"studyType":22,"phases":23,"briefSummary":25,"conditions":26,"keywords":32,"overallStatus":36,"whyStopped":4,"lastUpdateSubmitDate":37,"lastUpdatePostDateStruct":38,"startDateStruct":41,"completionDateStruct":43,"leadSponsor":45,"locationsCount":48},"100648133","bacterial-diversity-study-using-16s-rrna-sequencing-of-periodontal-samples-from-patients-with-orthodontic-retainers-100648133",false,"NCT07718061","Bacterial Diversity Study Using 16S rRNA Sequencing of Periodontal Samples From Patients With Orthodontic Retainers","Ortho-Perio","Inclusion Criteria:\n\n* Treatment involving both dental arches\n* Permanent dentition with at least 24 teeth\n* Treatment duration longer than 12 months\n* Treatment using the Versatile MBT system with a 0.022-inch slot\n\nExclusion Criteria:\n\n* Patients with systemic disease or taking medications that may affect periodontal health\n* Inadequate restorations or active carious lesions\n* iodontal disease\n* Plaque index greater than 20% before placement of the retainer or during the study\n* Use of oral antiseptics within the previous 6 months or during the study period\n* Use of antibiotics within the previous 14 days or during the study period\n* Smokers\n* Pregnant or breastfeeding women\n* Presence of open gingival embrasures, crowding, or dental malposition in the mandibular anterior region after orthodontic treatment","ALL","18 Years","40 Years",{"count":20,"type":21},10,"ESTIMATED","INTERVENTIONAL",[24],"NA","After completion of orthodontic treatment, a retention phase is required to prevent relapse of tooth malposition. Fixed retention in the mandibular anterior region is commonly used. This type of retainer is bonded to the lingual surfaces of the canines and incisors and may hinder oral hygiene, thereby promoting bacterial plaque accumulation and gingival inflammation.\n\nCurrently, probably due to the increasing use of clear aligner therapy, clear removable Essix-type retainers are becoming more widely used. Since these retainers can be removed by the patient, they may facilitate oral hygiene. However, studies assessing gingival health and the composition of the subgingival microbiota in patients wearing orthodontic retainers remain scarce.\n\nTherefore, the aim of this study will be to assess the composition of the gingival sulcus microbiota and gingival health in patients wearing fixed or removable orthodontic retainers.\n\nTen adult patients who have completed orthodontic treatment will be recruited and divided into two groups:\n\n1. Fixed retention group.\n2. Removable retention group.\n\nPeriodontal parameters will be assessed, and bacterial plaque samples will be collected from the gingival sulcus at five time points:\n\nT0: Bracket removal and dental scaling appointment. Periodontal parameters will be assessed, and plaque samples will be collected before bracket debonding and dental scaling.\n\nT1: Retainer placement appointment, three days after T0. Periodontal parameters will be assessed, and plaque samples will be collected before retainer placement.\n\nT2: One month after retainer placement.\n\nT3: Three months after retainer placement.\n\nT4: Six months after retainer placement.",[27,28,29,30,31],"Fixed Orthodontic Retainer","Orthodontic Appliances, Removable","Orthodontic Appliance Complication","Gingivitis","Periodontal Diseases",[33,34,30,35],"Orthodontic retainer","Periodontal health","Microbiota","RECRUITING","2026-07-27",{"date":39,"type":40},"2026-07-28","ACTUAL",{"date":42,"type":40},"2026-01-12",{"date":44,"type":21},"2027-07",{"name":46,"class":47},"Universidad de Murcia","OTHER",1,{"id":50,"slug":51,"hasResults":11,"nctId":52,"briefTitle":53,"officialTitle":54,"acronym":4,"eligibilityCriteria":55,"healthyVolunteers":56,"sex":16,"minAge":17,"maxAge":57,"enrollmentInfo":58,"targetDuration":4,"studyType":22,"phases":60,"briefSummary":61,"conditions":62,"keywords":4,"overallStatus":36,"whyStopped":4,"lastUpdateSubmitDate":68,"lastUpdatePostDateStruct":69,"startDateStruct":71,"completionDateStruct":73,"leadSponsor":75,"locationsCount":48},"100552706","retentive-capacity-of-bonded-retainer-vs-vacuum-formed-and-combined-bonded-vacuum-retainers-100552706","NCT06476574","Retentive Capacity of Bonded Retainer Vs Vacuum-formed and Combined Bonded-vacuum Retainers","Retentive Capacity of Bonded Retainer Versus Vacuum-formed and Combined Bonded-vacuum Retainers: A Randomized Controlled Clinical Trial","Inclusion Criteria:\n\n* Adult patients\n* Finished non-extraction orthodontic treatment\n* Full set of permanent dentition (excluding third molars).\n* Good oral hygiene\n* No restorations on lower anterior teeth or morphologic crown anomalies.\n* Little's irregularity index score 0\n\nExclusion Criteria:\n\n* Systemic disease or drugs affecting periodontal health.\n* Smokers\n* Poor oral health that precludes orthodontic treatment (presence of caries, active white spots,or periodontal diseases)",true,"35 Years",{"count":59,"type":21},45,[24],"The main goal is to test the differences between the retentive capacity of fixed retainer, vacuum-formed retainer \\& combination of both; and recommend the most effective protocol for retention of lower incisors crowding treated by non-extraction treatment plan\n\nThe main question is: In patients with lower incisors crowding treated by non-extraction treatment plans, what is the difference in retentive capacity between fixed retainer, vacuum formed retainer and combined bonded and vacuum retainers in maintaining corrected lower anterior segment crowding? After enrolment, each participant will have the orthodontic appliance debonded, the adhesive remnant removed and the enamel surface polished. An alginate impression will be taken to be poured into a study model which will be scanned to obtain STL files for digital models. All patients will have periodontal charting and probing depths recorded for the lower anterior segment. According to the randomization, each patient will be assigned to a group to receive the retainer. All patients will be called for follow-up after 1 week, 1 and 3 months.",[63,27,64,65,66,67],"Orthodontic Retainer","Orthodontic Relapse","Essix Retainer","Vacuum-formed Retainer","Dual Retention Protocol","2024-06-25",{"date":70,"type":40},"2024-06-26",{"date":72,"type":40},"2023-09-29",{"date":74,"type":21},"2024-08",{"name":76,"class":47},"Cairo University"]