[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-studies-list:{\"conditionNormalized\":\"dental-arch-development\",\"overallStatus\":[\"RECRUITING\",\"AVAILABLE\",\"NOT_YET_RECRUITING\"],\"orderBy\":\"LastUpdateSubmitDate:desc\",\"size\":25,\"offset\":0}":3,"health-study-condition:dental-arch-development":28},{"pageToken":4,"total":5,"offset":6,"count":5,"results":7},null,1,0,[8],{"id":9,"slug":10,"hasResults":11,"nctId":12,"briefTitle":13,"officialTitle":14,"acronym":4,"eligibilityCriteria":15,"healthyVolunteers":16,"sex":17,"minAge":18,"maxAge":19,"enrollmentInfo":20,"targetDuration":4,"studyType":23,"phases":4,"briefSummary":24,"conditions":25,"keywords":30,"overallStatus":35,"whyStopped":4,"lastUpdateSubmitDate":36,"lastUpdatePostDateStruct":37,"startDateStruct":40,"completionDateStruct":42,"leadSponsor":44,"locationsCount":5},"100590312","space-changes-after-premature-loss-of-lower-first-primary-molars-in-children-using-digital-scanning-100590312",false,"NCT06965777","Space Changes After Premature Loss of Lower First Primary Molars in Children Using Digital Scanning","The Space Changes Following Premature Loss of Lower First Primary Molars in the Primary Dentition Stage Using Digital Scanning A Prospective Split-mouth Clinical Study","Inclusion Criteria:\n\n* Children aged 3 to 5.5 years\n* Mandibular first primary molar indicated for extraction due to extensive decay or hopeless prognosis\n* Contralateral mandibular first primary molar must be intact and free of proximal caries\n* No eruption of mandibular permanent first molar at the time of enrollment\n* Presence of primary canines and second primary molars\n* No space maintainers placed\n* Parents\u002Fcaregivers unable or unwilling to fabricate a space maintainer\n\nExclusion Criteria:\n\n* Bilateral premature loss of mandibular first primary molars\n* Contralateral mandibular molar has proximal caries or poor prognosis\n* Children with good prognosis first primary molars (i.e., not needing extraction)\n* Eruption of the mandibular permanent first molar\n* Children who already have space maintainers\n* Uncooperative behavior preventing study participation",true,"ALL","3 Years","66 Months",{"count":21,"type":22},11,"ESTIMATED","OBSERVATIONAL","This prospective split-mouth clinical study aims to evaluate space changes in the mandibular dental arch following premature extraction of the lower first primary molar in children aged 3 to 5.5 years. Using digital 3D models, changes in the D space and mandibular arch perimeter will be measured at baseline and 6 months post-extraction. The goal is to determine whether space maintainers are necessary in the primary dentition stage.",[26,27,28,29],"Premature Loss of Primary Molars","Space Maintenance","Dental Arch Development","Pediatric Tooth Extraction",[31,32,33,34],"Tooth Loss","Dental Arch","Pediatric Dentistry","Primary Dentition","NOT_YET_RECRUITING","2025-05-10",{"date":38,"type":39},"2025-05-14","ACTUAL",{"date":41,"type":22},"2025-08-01",{"date":43,"type":22},"2026-03-01",{"name":45,"class":46},"Cairo University","OTHER"]