[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100600158":3},{"organization":4,"armGroups":7,"interventions":18,"overallOfficials":23,"centralContacts":27,"locations":32,"responsibleParty":48,"collaborators":51,"id":54,"slug":55,"hasResults":56,"nctId":57,"briefTitle":58,"officialTitle":59,"acronym":10,"eligibilityCriteria":60,"healthyVolunteers":56,"sex":61,"minAge":62,"maxAge":63,"enrollmentInfo":64,"targetDuration":10,"studyType":67,"phases":10,"briefSummary":68,"conditions":69,"keywords":10,"overallStatus":35,"whyStopped":10,"lastUpdateSubmitDate":71,"lastUpdatePostDateStruct":72,"startDateStruct":75,"completionDateStruct":77,"leadSponsor":79,"locationsCount":80},{"fullName":5,"class":6},"Menoufia University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Group I - Locator Attachments",null,"Patients received four implants were placed in the lateral incisor and first premolar regions. Overdentures were retained using unsplinted Locator attachments, processed chairside via direct intraoral pick-up, with vent holes to allow resin escape. These prostheses were implant-retained and tissue-supported.",[13],"Other: Four Locator Attachments, Four Bar Attachment System",{"label":15,"type":10,"description":16,"interventionNames":17},"Group II - Bar Attachments","Patient also received four implants in the same quadrilateral distribution. The implants were splinted with a custom-milled titanium bar, and overdentures were retained using clip attachments. These prostheses were designed to be fully implant-supported, minimizing soft tissue loading.",[13],[19],{"type":6,"name":20,"description":21,"armGroupLabels":22,"otherNames":10},"Four Locator Attachments, Four Bar Attachment System","This study retrospectively evaluated two types of implant-retained mandibular overdenture attachment systems placed in edentulous patients over a 10-year period. All patients received four dental implants placed in the interforaminal region (lateral incisor and first premolar areas).\n\nIn the Locator group, each implant was restored with an individual Locator attachment, allowing for independent retention and easier hygiene access.\n\nIn the Bar group, the four implants were splinted together with a rigid metal bar, and the overdenture was attached using clips that engaged the bar, offering splinted support and enhanced load distribution.\n\nBoth interventions were designed to support mandibular overdentures and were compared in terms of their long-term effects on posterior mandibular ridge resorption, marginal bone loss around implants, and anterior maxillary ridge resorption.",[9,15],[24],{"name":25,"affiliation":5,"role":26},"Mohammed El-Sawy, PhD","PRINCIPAL_INVESTIGATOR",[28],{"name":25,"role":29,"phone":30,"phoneExt":10,"email":31},"CONTACT","00201061314522","Dr_sawy@windowslive.com",[33],{"facility":34,"status":35,"city":36,"state":37,"zip":10,"country":38,"countryCode":39,"cosmosGeoPoint":40,"geoPoint":45,"contacts":46},"Faculty of Dentistry","RECRUITING","Al Mansurah","Menoufia","Egypt","EG",{"type":41,"coordinates":42},"Point",[43,44],31.38069,31.03637,{"lat":44,"lon":43},[47],{"name":25,"role":29,"phone":30,"phoneExt":10,"email":31},{"type":26,"investigatorFullName":49,"investigatorTitle":50,"investigatorAffiliation":5,"oldNameTitle":10,"oldOrganization":10},"Mohammed El-Sawy","Dr",[52],{"name":53,"class":6},"Mansoura University","100600158","mandibular-overdentures-retained-by-four-locator-attachments-versus-four-implant-bar-attachments-100600158",false,"NCT07093853","Mandibular Overdentures Retained by Four Locator Attachments Versus Four-Implant Bar Attachments","Residual Ridge Changes in Mandibular Overdentures Retained by Four Locator Attachments Versus Four-Implant Bar Attachments: A 10-Year Retrospective Study","Inclusion Criteria:\n\n* Completely edentulous mandible and maxilla for at least 12 months.\n* Four interforaminal dental implants placed in the lateral incisor and first premolar regions.\n* Opposing maxillary complete denture constructed using a muco-compressive impression technique, with maximum denture base extension and lingualized occlusion.\n* Mandibular bone height between 15-25 mm at the symphysis region as measured on panoramic radiograph.\n* Minimum 10-year follow-up with adequate radiographic documentation.\n\nExclusion Criteria:\n\n* Systemic diseases affecting bone metabolism.\n* Parafunctional habits (e.g., bruxism).\n* Smokers of more than 10 cigarettes\u002Fday or those with alcohol abuse.\n* Patients with implant failures, missing follow-up data, or implants placed outside the interforaminal region.","ALL","40 Years","70 Years",{"count":65,"type":66},22,"ESTIMATED","OBSERVATIONAL","This 10-year retrospective study investigates residual ridge changes in edentulous patients treated with mandibular overdentures (ODs) retained by either four Locator attachments or a four-implant bar system. Although two-implant ODs are well established, four-implant configurations may offer enhanced stability and function. Locator and bar attachments are commonly used, but their long-term effects on bone resorption patterns-especially posterior mandibular and anterior maxillary resorption-remain unclear. By standardizing implant positions, this study aims to directly compare the two systems to help guide clinicians in selecting the most effective attachment type for long-term success.",[70],"Bone Loss","2025-07-22",{"date":73,"type":74},"2025-07-30","ACTUAL",{"date":76,"type":74},"2024-01-01",{"date":78,"type":66},"2025-10-01",{"name":5,"class":6},1]