[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100641902":3},{"organization":4,"armGroups":7,"interventions":20,"overallOfficials":29,"centralContacts":33,"locations":43,"responsibleParty":94,"collaborators":97,"id":102,"slug":103,"hasResults":104,"nctId":105,"briefTitle":106,"officialTitle":106,"acronym":25,"eligibilityCriteria":107,"healthyVolunteers":108,"sex":109,"minAge":110,"maxAge":25,"enrollmentInfo":111,"targetDuration":25,"studyType":114,"phases":115,"briefSummary":117,"conditions":118,"keywords":121,"overallStatus":123,"whyStopped":25,"lastUpdateSubmitDate":124,"lastUpdatePostDateStruct":125,"startDateStruct":128,"completionDateStruct":130,"leadSponsor":132,"locationsCount":133},{"fullName":5,"class":6},"National University of Malaysia","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Hawley retainer","ACTIVE_COMPARATOR","A screening will be done to select suitable patients for the study. Only patients who fulfil the criteria will be invited to participate in this study. Following informed consent, eligible subjects will be randomly allocated into one of two groups wither hawley retainer or 3D printed retainer. Fabrication of Hawley retainers will be done using a standardized design across all centres.",[13],"Device: Hawley retainer",{"label":15,"type":16,"description":17,"interventionNames":18},"3D printed retainer","EXPERIMENTAL","A screening will be done to select suitable patients for the study. Only patients who fulfil the criteria will be invited to participate in this study. Following informed consent, eligible subjects will be randomly allocated into one of two groups wither hawley retainer or 3D printed retainer. Fabrication of 3d printed retainers will be done using a standardized design at one main centres by one technician using Nextdent Orhtoflex Resin.",[19],"Device: 3D printed retainer",[21,26],{"type":22,"name":15,"description":23,"armGroupLabels":24,"otherNames":25},"DEVICE","3D-printed retainer Using Nextdent Orthoflex resin\n\nStandard design of 3D printed retainer:\n\n* Monolithic design (no wires)\n* Thickness 0.8mm-1.0 mm\n* Fully cover the teeth and part of the gingiva (1-2mm)\n* Undercut block - 0.25-0.5mm",[15],null,{"type":22,"name":9,"description":27,"armGroupLabels":28,"otherNames":25},"Hawley retainers have served as the established standard for retention after maxillary expansion. Standard design of Hawley Retainer: - Labial bow (0.8mm hard stainless steel) from canine to canine - Adam clasp on the molar (0.7mm hard stainless steel) - acrylic baseplate (2-3mm thickness) .",[9],[30],{"name":31,"affiliation":5,"role":32},"Asma Ashari, MClinDent Lon","STUDY_DIRECTOR",[34,39],{"name":35,"role":36,"phone":37,"phoneExt":25,"email":38},"Asma Ashari, BDS Adel, MClinDent Lon, MOrth","CONTACT","+603 8921 5555","asmaashari@ukm.edu.my",{"name":40,"role":36,"phone":41,"phoneExt":25,"email":42},"ALIZAE MARNY FADZLIN SYED MOHAMED","+6038921 5555","alizaemarny@ukm.edu.my",[44,63,77],{"facility":45,"status":25,"city":46,"state":46,"zip":47,"country":48,"countryCode":49,"cosmosGeoPoint":50,"geoPoint":55,"contacts":56},"National University Of Malaysia","Kuala Lumpur","50300","Malaysia","MY",{"type":51,"coordinates":52},"Point",[53,54],101.68653,3.1412,{"lat":54,"lon":53},[57,60],{"name":58,"role":36,"phone":59,"phoneExt":25,"email":38},"Fakulti pergigian UKM","+6039289 7741",{"name":61,"role":62,"phone":25,"phoneExt":25,"email":25},"Mei Ling Cheng","PRINCIPAL_INVESTIGATOR",{"facility":64,"status":25,"city":46,"state":46,"zip":65,"country":48,"countryCode":49,"cosmosGeoPoint":66,"geoPoint":68,"contacts":69},"University Malaya","50603",{"type":51,"coordinates":67},[53,54],{"lat":54,"lon":53},[70,74],{"name":71,"role":36,"phone":72,"phoneExt":25,"email":73},"May Nak Lau","+60379674802","minalau@um.edu.my",{"name":75,"role":76,"phone":25,"phoneExt":25,"email":25},"Zhang Yi Tan","SUB_INVESTIGATOR",{"facility":78,"status":25,"city":79,"state":80,"zip":81,"country":48,"countryCode":49,"cosmosGeoPoint":82,"geoPoint":86,"contacts":87},"University Teknologi Mara Selangor branch","Sungai Buloh","Selangor","47000",{"type":51,"coordinates":83},[84,85],101.561,3.21,{"lat":85,"lon":84},[88,92],{"name":89,"role":36,"phone":90,"phoneExt":25,"email":91},"Nik Mukhriz Nik Mustapha","+6036126 6103","nikmukhriz@uitm.edu.my",{"name":93,"role":76,"phone":25,"phoneExt":25,"email":25},"Siti Nor Hafizah Salehun",{"type":62,"investigatorFullName":95,"investigatorTitle":96,"investigatorAffiliation":5,"oldNameTitle":25,"oldOrganization":25},"ASMA ASHARI","DR",[98,100],{"name":99,"class":6},"University of Malaya",{"name":101,"class":6},"Universiti Teknologi Mara","100641902","effectiveness-patient-acceptance-and-cost-estimation-of-3d-printed-retainer-compared-to-hawley-retainer-in-expansion-case-a-randomized-controlled-trial-100641902",false,"NCT07659041","Effectiveness, Patient Acceptance, and Cost Estimation of 3D-printed Retainer Compared to Hawley Retainer in Expansion Case: a Randomized Controlled Trial","Inclusion Criteria:\n\n* Patients aged 16 years or older at the time of debonding\n* Treatment plan of extraction or non-extraction followed by straight wire appliances in the upper arch only or both arches\n* Undergone expansion treatment in the upper arch causing an arch width increase of 3-10mm, either using a Quadhelix, expansion with archwires, or URA with midline screw\n* Had pretreatment dental cast\n* Had no chronic medical condition.\n\nExclusion Criteria:\n\n* Cleft lip and palate\n* Chronic medical conditions\n* Broken teeth or bubbles on study model at site of measurement.",true,"ALL","16 Years",{"count":112,"type":113},28,"ESTIMATED","INTERVENTIONAL",[116],"NA","Expansion of the arches is generally considered highly unstable and prone to relapse regardless of the type of expansion. Retention appliances play a vital role in preserving these changes. Hawley retainer users often avoid wearing them due to speech difficulties and less aesthetic appeal. They are also more prone to breakage, costlier, and require more labour. Despite the relatively recent introduction of 3D-printed retainers, they offer potential advantages in orthodontics, including the accuracy of digitally scanned images, reduced labour and material costs, and improved patient comfort. While 3D-printed retainers are quite new, most studies focus on laboratory testing of their mechanical properties, there is limited evidence directly comparing their effectiveness in retaining arch width increases, patient acceptance, and cost estimation. This knowledge gap creates uncertainty about the optimal choice of retainer for long-term stability, necessitating a comparative assessment of their performance. This study addresses this knowledge gap by evaluating the retention of arch width increases achieved using Hawley retainers versus 3D-printed retainers",[119,120],"Orthodontic Relapse","Retention in Orthodontic",[122,15],"orthodontic","NOT_YET_RECRUITING","2026-06-15",{"date":126,"type":127},"2026-06-22","ACTUAL",{"date":129,"type":113},"2026-06",{"date":131,"type":113},"2027-12",{"name":5,"class":6},3]