[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100585328":3},{"organization":4,"armGroups":7,"interventions":20,"overallOfficials":25,"centralContacts":30,"locations":41,"responsibleParty":59,"collaborators":25,"id":63,"slug":64,"hasResults":65,"nctId":66,"briefTitle":67,"officialTitle":68,"acronym":25,"eligibilityCriteria":69,"healthyVolunteers":70,"sex":71,"minAge":72,"maxAge":73,"enrollmentInfo":74,"targetDuration":25,"studyType":77,"phases":78,"briefSummary":80,"conditions":81,"keywords":25,"overallStatus":44,"whyStopped":25,"lastUpdateSubmitDate":83,"lastUpdatePostDateStruct":84,"startDateStruct":87,"completionDateStruct":89,"leadSponsor":91,"locationsCount":92},{"fullName":5,"class":6},"Cairo University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Study Group A: Retromolar bone block covered with collagen membrane.","EXPERIMENTAL","The onlay bone block harvested from retromolar region and fixed with micro screws, a mixture of autogenous and xenogenic particulate bone graft is going to be packed in between the bone block and recipient site. The assembly is going to be covered with native collagen membrane and fixed with titanium bone tacks.",[13],"Procedure: Onlay bone block covered with collagen membrane",{"label":15,"type":16,"description":17,"interventionNames":18},"Control Group B: Retromolar bone block without collagen membrane.","ACTIVE_COMPARATOR","The onlay bone block harvested from retromolar region and fixed with micro screws, a mixture of autogenous and xenogenic particulate bone graft is going to be packed in between the bone block and recipient site.",[19],"Procedure: Onlay bone block without collagen membrane",[21,26],{"type":22,"name":23,"description":23,"armGroupLabels":24,"otherNames":25},"PROCEDURE","Onlay bone block covered with collagen membrane",[9],null,{"type":22,"name":27,"description":28,"armGroupLabels":29,"otherNames":25},"Onlay bone block without collagen membrane","Onlay bone block covered without collagen membrane",[15],[31,37],{"name":32,"role":33,"phone":34,"phoneExt":35,"email":36},"Mohannad A. Ismail, MSc.","CONTACT","01222968444","+20","mohannadahmed@hotmail.com",{"name":38,"role":33,"phone":39,"phoneExt":35,"email":40},"Niveen A. Askar, PhD","01001558769","niveen.askar@dentistry.cu.edu.eg",[42],{"facility":43,"status":44,"city":45,"state":25,"zip":46,"country":47,"countryCode":48,"cosmosGeoPoint":49,"geoPoint":54,"contacts":55},"Faculty of Dentistry Cairo University","RECRUITING","Cairo","11553","Egypt","EG",{"type":50,"coordinates":51},"Point",[52,53],31.24967,30.06263,{"lat":53,"lon":52},[56],{"name":57,"role":33,"phone":58,"phoneExt":35,"email":40},"Niveen A. Askar, Professor","+201001558769",{"type":60,"investigatorFullName":61,"investigatorTitle":62,"investigatorAffiliation":5,"oldNameTitle":25,"oldOrganization":25},"PRINCIPAL_INVESTIGATOR","Mohannad Ahmed Ismail","Principle Investigator","100585328","reconstruction-of-deficient-maxillary-ridges-using-retromolar-blocks-with-and-without-collagen-membrane-100585328",false,"NCT06900933","Reconstruction of Deficient Maxillary Ridges Using Retromolar Blocks With and Without Collagen Membrane","Reconstruction of Horizontally Deficient Atrophic Maxillary Ridges Using Retromolar Blocks With and Without Coverage Using Collagen Membrane (Randomized Clinical Trials)","Inclusion Criteria:\n\n* Patients with maxillary residual alveolar bone height not less than 8 mm.\n* Alveolar bone width from less than or equal 5 mm.\n* Both genders.\n* At least missing single tooth.\n* Previous Failed Implants.\n* Previous Failed Grafting.\n\nExclusion Criteria:\n\n* • Heavy smokers more than 20 cigarettes per day.\n\n  * Patients with alcohol abuse\n  * Patients with narcotic abuse.\n  * Patients with bone disease that may affect normal healing, example; hyperparathyroidism.\n  * Patients had radiotherapy and chemotherapy in head and neck.\n  * Patients had neoplasms in sites to be grafted.\n  * Patients with Metabolic diseases uncontrolled diabetic patients, Glycated hemoglobin (Hb A1c) more than 7 mg\\\\dl.\n  * Pregnant females.\n  * Patients with Para functional habits, apprehensive and non-cooperative.\n  * Bone pathology related to the site to be grafted.\n  * Psychological problems, stress situation (socially or professionally), emotional instability, and unrealistic patients' expectations.\n  * Intraoral soft and hard tissue pathology.\n  * Systemic condition that contraindicate implant placement.\n  * Under the age of 18 years.",true,"ALL","20 Years","40 Years",{"count":75,"type":76},30,"ESTIMATED","INTERVENTIONAL",[79],"NA","Is the use of collagen membrane on top of particulate bone mixture covered by onlay bone block in Maxilla better than the use of mixture of particulate bone covered by onlay bone block without the use of collagen membrane, in terms of bone quantity?",[82],"Bone Augmentation","2025-07-12",{"date":85,"type":86},"2025-07-16","ACTUAL",{"date":88,"type":86},"2025-05-28",{"date":90,"type":76},"2026-02-15",{"name":5,"class":6},1]