[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100638031":3},{"organization":4,"armGroups":7,"interventions":20,"overallOfficials":25,"centralContacts":29,"locations":39,"responsibleParty":59,"collaborators":25,"id":63,"slug":64,"hasResults":65,"nctId":66,"briefTitle":67,"officialTitle":68,"acronym":25,"eligibilityCriteria":69,"healthyVolunteers":65,"sex":70,"minAge":71,"maxAge":72,"enrollmentInfo":73,"targetDuration":25,"studyType":76,"phases":77,"briefSummary":79,"conditions":80,"keywords":84,"overallStatus":41,"whyStopped":25,"lastUpdateSubmitDate":86,"lastUpdatePostDateStruct":87,"startDateStruct":90,"completionDateStruct":92,"leadSponsor":94,"locationsCount":95},{"fullName":5,"class":6},"Suez Canal University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Group I","ACTIVE_COMPARATOR","Conventional spacemaintainer",[13],"Device: Conventional spacemaintainer",{"label":15,"type":16,"description":17,"interventionNames":18},"Group II","EXPERIMENTAL","3D printed spacemaintainer",[19],"Device: 3D printed spacemaintainer",[21,26],{"type":22,"name":11,"description":23,"armGroupLabels":24,"otherNames":25},"DEVICE","Two bands will be selected and checked for fit and adaptation around the distal abutment teeth, then an alginate impression will be taken and will be sent to the laboratory for fabrication",[9],null,{"type":22,"name":17,"description":27,"armGroupLabels":28,"otherNames":25},"An intraoral scan for the patients' lower arch will be taken using a 3D digital dental scanner.",[15],[30,35],{"name":31,"role":32,"phone":33,"phoneExt":25,"email":34},"Reham M. Assistant Professor, PhD","CONTACT","+966545318171","reham_mohamed@dent.suez.edu.eg",{"name":36,"role":32,"phone":37,"phoneExt":25,"email":38},"Rim M. Lecturer, PhD","+201222726567","rim_fathalla@dent.suez.edu.eg",[40],{"facility":5,"status":41,"city":42,"state":43,"zip":44,"country":45,"countryCode":46,"cosmosGeoPoint":47,"geoPoint":52,"contacts":53},"RECRUITING","Ismailia","Ismailia Governorate","41522","Egypt","EG",{"type":48,"coordinates":49},"Point",[50,51],32.27225,30.60427,{"lat":51,"lon":50},[54,57],{"name":55,"role":32,"phone":56,"phoneExt":25,"email":34},"Reham M. Principle investigator, Assistant professor","0545318171",{"name":58,"role":32,"phone":25,"phoneExt":25,"email":25},"Rim M. Co-investigator, Lecturer",{"type":60,"investigatorFullName":61,"investigatorTitle":62,"investigatorAffiliation":5,"oldNameTitle":25,"oldOrganization":25},"PRINCIPAL_INVESTIGATOR","Reham Mohamed","Assistant Professor","100638031","the-objective-of-this-research-is-to-compare-the-clinical-effectiveness-of-the-conventional-lingual-arch-space-maintainers-with-three-dimensional-printed-space-maintainers-100638031",false,"NCT07591324","the Objective of This Research is to Compare the Clinical Effectiveness of the Conventional Lingual Arch Space Maintainers With Three-dimensional Printed Space Maintainers.","Comparative Evaluation of the Conventional and Three-Dimensional Printed Lower Lingual Arch Space Maintainers A Randomized Clinical Trial","Inclusion Criteria:\n\n* Apparently, healthy cooperative children have recently prematurely loss of more than one mandibular primary molar in any of the quadrants, full erupted mandibular first permanent molars in both sides, and whose lower permanent incisors have erupted\n* The permanent successors of the lost primary molars were not expected to erupt within 6 months\n* Angle's class 1 occlusion with normal primary molar relation\n* Caries-free and periodontally healthy abutment teeth\n* Absence of parafunctional habits or abnormal occlusion conditions such as crossbite, open bite, or deep bite.\n* Children's age ranges from 7 to 9 years-old\n* Radiographically, presence of permanent successors, more than one millimeter of bone covering the successor tooth germ, and\u002For only about one-third of the root of the permanent tooth has been formed.\n* Parents and children were accepting the new treatment modality.\n\nExclusion Criteria:\n\n* children exhibited poor oral hygiene, para-functional oral habits, severe crowding, space loss, and abnormal occlusion\n* Extraction of primary molars exceeding three months.\n* Radiographically, absence of permanent successor.\n* uncooperative children","ALL","7 Years","9 Years",{"count":74,"type":75},44,"ESTIMATED","INTERVENTIONAL",[78],"NA","the objective of this research is to compare the clinical effectiveness of the conventional lingual arch space maintainers with three-dimensional printed space maintainers.",[81,82,83],"Gingival Health","Space Maintenance","Pain and Anxiety",[85,17],"lingual arch spacemaintainer","2026-05-12",{"date":88,"type":89},"2026-05-15","ACTUAL",{"date":91,"type":89},"2025-01-22",{"date":93,"type":75},"2026-09-01",{"name":5,"class":6},1]