[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100620787":3},{"organization":4,"armGroups":7,"interventions":19,"overallOfficials":28,"centralContacts":32,"locations":38,"responsibleParty":54,"collaborators":24,"id":58,"slug":59,"hasResults":60,"nctId":61,"briefTitle":62,"officialTitle":63,"acronym":64,"eligibilityCriteria":65,"healthyVolunteers":66,"sex":67,"minAge":68,"maxAge":69,"enrollmentInfo":70,"targetDuration":24,"studyType":73,"phases":74,"briefSummary":76,"conditions":77,"keywords":80,"overallStatus":41,"whyStopped":24,"lastUpdateSubmitDate":86,"lastUpdatePostDateStruct":87,"startDateStruct":90,"completionDateStruct":92,"leadSponsor":94,"locationsCount":95},{"fullName":5,"class":6},"University of Baghdad","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"New clear expander","EXPERIMENTAL","After obtaining the 3D-printed maxillary dental cast, a 2 mm PETG (rigid) thermoforming material (Leone® S.p.A., Florence, Italy) will be adapted separately to the maxillary cast using a pressure molding vacuum machine. The clear appliance will then be trimmed and finished. Depending on the degree of maxillary constriction, a Leone® Standard or universal expansion screw (Leone® S.p.A.,Florence, Italy) measuring 6-9 mm will be incorporated into the appliance and positioned in the midline of the maxillary cast after splitting the appliance midpalatally embedded in acrylic composed from Methyl methacrylate monomer and Methyl methacrylate polymer Orthocryl® liquid (monomer), and Orthocryl® EQ-powder (polymer) (Dentaurum GmbH \\& Co. KG, Ispringen, Germany)",[13],"Device: New clear expander",{"label":15,"type":10,"description":16,"interventionNames":17},"Hyrax expander","After obtaining the 3D-printed maxillary dental cast, patients will be treated with a Hyrax expander using a rapid expander from Leone® S.p.A., Florence, Italy, cemented in the upper first premolars and first molars. If the first premolars had not yet erupted, the Hyrax expander will be cemented in the upper first permanent molars only.",[18],"Device: Hyrax expander",[20,25],{"type":21,"name":9,"description":22,"armGroupLabels":23,"otherNames":24},"DEVICE","All patients with a clear expander will be instructed to wear the appliance 24 hours a day, except during eating and cleaning. The expander will be activated twice daily (0.2 mm per turn). Patients will be provided with an instruction brochure and advised to use a reminder to ensure compliance. The expansion will continue until the desired amount of the maxillary arch expansion occurs when the maxillary first molars' palatal cusps occlude the lingual side of the mandibular first molar buccal cusps to overcome the expected relapse due to the elasticity of the palatal soft tissue.",[9],null,{"type":21,"name":15,"description":26,"armGroupLabels":27,"otherNames":24},"The activation protocol for the Hyrax expander will be the same in all patients, twice daily (0.2 mm per turn). The expansion will continue until the desired amount of the maxillary arch expansion occurs when the maxillary first molars' palatal cusps occlude the lingual side of the mandibular first molar buccal cusps to overcome the expected relapse due to the elasticity of the palatal soft tissue.",[15],[29],{"name":30,"affiliation":5,"role":31},"Yassir A Yassir, Ph.D. (UK)","STUDY_CHAIR",[33],{"name":34,"role":35,"phone":36,"phoneExt":24,"email":37},"Noor FK Al-Khawaja, BDS, MSc","CONTACT","+9647712222834","noor.alkhawaja@codental.uobaghdad.edu.iq",[39],{"facility":40,"status":41,"city":42,"state":43,"zip":24,"country":44,"countryCode":45,"cosmosGeoPoint":46,"geoPoint":51,"contacts":52},"University of Baghdad\u002FCollage of Dentistry","RECRUITING","Baghdad","Al-Rusafa, Bab Al-moadham","Iraq","IQ",{"type":47,"coordinates":48},"Point",[49,50],44.40088,33.34058,{"lat":50,"lon":49},[53],{"name":34,"role":35,"phone":36,"phoneExt":24,"email":37},{"type":55,"investigatorFullName":56,"investigatorTitle":57,"investigatorAffiliation":5,"oldNameTitle":24,"oldOrganization":24},"PRINCIPAL_INVESTIGATOR","Noor Falah Kadhim Al-Khawaja","postgraduate\u002FPhD student","100620787","clear-orthodontic-expander-versus-hyrax-100620787",false,"NCT07362160","Clear Orthodontic Expander Versus Hyrax","Evaluating the Clinical Performance of a Novel Clear Orthodontic Expander Versus Hyrax: A Randomized Clinical Trial","COE-Hyarx","Inclusion Criteria:\n\n1. Patients' age at the start of treatment will range from 10-14 years.\n2. Unstable unilateral or bilateral posterior crossbite due to maxillary constriction.\n3. The first molars are fully erupted.\n4. Good oral health free from caries and periodontal problems at the start of treatment.\n5. Good general health.\n\nExclusion Criteria:\n\n1. Patients with obvious facial asymmetry.\n2. Patients with orofacial cleft.\n3. Patients with previous orthodontic treatment.\n4. Patients with bad oral habits.\n5. Patients with active periodontal disease.",true,"ALL","10 Years","14 Years",{"count":71,"type":72},40,"ESTIMATED","INTERVENTIONAL",[75],"NA","This study will be conducted to evaluate the effectiveness of a clear expander fabricated from 2-mm biocompatible polyethylene terephthalate glycol (PETG) thermoforming material integrated with an expansion screw in achieving dental and skeletal expansion in adolescent patients, compared with the conventional Hyrax expander.",[78,79],"Malocclusion","Narrow Maxilla",[81,82,83,84,85],"clear expander","hyrax","clinical trial","adolescent","thermoplastic material","2026-04-17",{"date":88,"type":89},"2026-04-22","ACTUAL",{"date":91,"type":89},"2026-02-01",{"date":93,"type":72},"2027-02-01",{"name":5,"class":6},1]