[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"maxilla-hypoplasia\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:maxilla-hypoplasia":45},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":4,"hasResults":10,"nctId":11,"briefTitle":12,"officialTitle":13,"acronym":4,"eligibilityCriteria":14,"healthyVolunteers":10,"sex":15,"minAge":16,"maxAge":17,"enrollmentInfo":18,"targetDuration":4,"studyType":21,"phases":22,"briefSummary":24,"conditions":25,"keywords":28,"overallStatus":33,"whyStopped":4,"lastUpdateSubmitDate":34,"lastUpdatePostDateStruct":35,"startDateStruct":38,"completionDateStruct":40,"leadSponsor":42,"locationsCount":5},"100616154",false,"NCT07301918","Leaf Expander Versus Hyrax Expander in Mixed Dentition Patients With Posterior Crossbite.","Evaluation of the Effects of the Leaf Expander Versus Hyrax Expander in Mixed Dentition Patients With Posterior Crossbite: A Randomized Clinical Trial.","Inclusion Criteria:\n\n* Male and female patients\n* Mixed dentition stage\n* Unilateral or bilateral posterior crossbite.\n* Patients in prepubertal stage with cervical vertebral maturation stage 1-3.\n* Fully erupted maxillary and mandibular permanent first molars.\n* Skeletal class I or II.\n\nExclusion Criteria:\n\n* Previous orthodontic treatment.\n* Missing teeth.\n* Inadequate oral hygiene.\n* Patients with bad oral habits.\n* Patients with medical conditions.\n* Patients with cleft lip and palate.","ALL","6 Years","12 Years",{"count":19,"type":20},30,"ESTIMATED","INTERVENTIONAL",[23],"NA","Design: Two-arm parallel randomized clinical trial in mixed dentition (6-12 years).\n\nArms: (1) 9 mm, 900 g leaf expander; (2) 9 mm Hyrax expander. Follow-up: From appliance insertion → completion of intended expansion → 6-month retention.\n\nPrimary outcome: Pain perception during the first 7 days post-insertion (daily patient-reported scale).\n\nSecondary outcomes: Skeletal and dental changes on CBCT.",[26,27],"Posterior Crossbite","Maxilla; Hypoplasia",[29,30,31,32],"expander","maxillary transverse deficiency","posterior crossbite","mixed dentition","RECRUITING","2026-06-03",{"date":36,"type":37},"2026-06-04","ACTUAL",{"date":39,"type":37},"2025-10-01",{"date":41,"type":20},"2027-03",{"name":43,"class":44},"Cairo University","OTHER",""]