[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100597976":3},{"organization":4,"armGroups":7,"interventions":24,"overallOfficials":30,"centralContacts":40,"locations":49,"responsibleParty":74,"collaborators":30,"id":78,"slug":79,"hasResults":80,"nctId":81,"briefTitle":82,"officialTitle":83,"acronym":84,"eligibilityCriteria":85,"healthyVolunteers":86,"sex":87,"minAge":88,"maxAge":89,"enrollmentInfo":90,"targetDuration":30,"studyType":93,"phases":94,"briefSummary":96,"conditions":97,"keywords":102,"overallStatus":51,"whyStopped":30,"lastUpdateSubmitDate":112,"lastUpdatePostDateStruct":113,"startDateStruct":116,"completionDateStruct":118,"leadSponsor":120,"locationsCount":121},{"fullName":5,"class":6},"Mansoura University","OTHER",[8,14,19],{"label":9,"type":10,"description":11,"interventionNames":12},"Conventional Splinted Impression","EXPERIMENTAL","Participants will undergo a conventional impression technique using open-tray impression copings rigidly splinted with DuraLay resin. The impression is taken using polyvinyl siloxane (PVS) material in a custom tray. This method serves as the control for comparison with digital techniques.",[13],"Procedure: Conventional Splinted Impression Technique",{"label":15,"type":10,"description":16,"interventionNames":17},"Standard Digital Scan","Participants will undergo a full-arch digital scan using an intraoral scanner. Scan bodies will be attached to the multi-unit abutments, and the scan will be performed without any additional geometric reference aids.",[18],"Device: Intraoral Scanner - Standard Protocol",{"label":20,"type":10,"description":21,"interventionNames":22},"Geometric Pattern-Assisted Digital Scan","Participants will undergo a full-arch digital scan using an intraoral scanner, with the addition of a geometric reference pattern placed in the scanning field to improve stitching accuracy and scan reliability.",[23],"Device: Intraoral Scanner with Geometric Reference Pattern",[25,31,35],{"type":26,"name":27,"description":28,"armGroupLabels":29,"otherNames":30},"DEVICE","Intraoral Scanner - Standard Protocol","A full-arch digital impression is obtained using a high-precision intraoral scanner. Scan bodies are placed on multi-unit abutments and scanned without the use of external reference markers or geometric aids. The scan follows the manufacturer-recommended scanning path to capture the complete arch. This serves as a baseline digital technique for comparison with geometric pattern-assisted scanning.",[15],null,{"type":26,"name":32,"description":33,"armGroupLabels":34,"otherNames":30},"Intraoral Scanner with Geometric Reference Pattern","The same intraoral scanner is used, but with an additional geometric reference pattern introduced in the scanning field to improve stitching accuracy and alignment of the digital scan.",[20],{"type":36,"name":37,"description":38,"armGroupLabels":39,"otherNames":30},"PROCEDURE","Conventional Splinted Impression Technique","A physical impression is taken using open-tray impression copings splinted with DuraLay resin and polyvinyl siloxane (PVS) material in a custom tray, according to conventional protocols for full-arch implant prostheses.",[9],[41,46],{"name":42,"role":43,"phone":44,"phoneExt":30,"email":45},"Mirna A. Anis","CONTACT","+20502522062","mirnaashraf01@gmail.com",{"name":47,"role":43,"phone":48,"phoneExt":30,"email":30},"Khaled M. Zahran","20 50 2200150",[50],{"facility":5,"status":51,"city":52,"state":53,"zip":54,"country":55,"countryCode":56,"cosmosGeoPoint":57,"geoPoint":62,"contacts":63},"RECRUITING","Al Mansurah","Dakahlia Governorate","35516","Egypt","EG",{"type":58,"coordinates":59},"Point",[60,61],31.38069,31.03637,{"lat":61,"lon":60},[64,67,71],{"name":65,"role":43,"phone":66,"phoneExt":30,"email":45},"Mirna Ashraf, B.D.S., M.D.S.","+20 1281771023",{"name":68,"role":43,"phone":30,"phoneExt":69,"email":70},"Khaled Zahran, Ph.D.","+20 1002706780","khaled.zahran@mans.edu.eg",{"name":72,"role":73,"phone":30,"phoneExt":30,"email":30},"Mirna Ashraf Anis, B.D.S., M.D.S.","PRINCIPAL_INVESTIGATOR",{"type":75,"investigatorFullName":76,"investigatorTitle":77,"investigatorAffiliation":5,"oldNameTitle":30,"oldOrganization":30},"SPONSOR_INVESTIGATOR","Mirna ashraf anis heneen","Assistant Lecturer of Prosthodontics, Horus University, Damietta - PhD Candidate, Mansoura University","100597976","accuracy-of-standard-and-geometric-pattern-assisted-digital-scanning-for-full-arch-implant-prosthesis-frameworks-100597976",false,"NCT07065487","Accuracy of Standard and Geometric Pattern-Assisted Digital Scanning for Full-Arch Implant Prosthesis Frameworks","Accuracy of Standard vs Geometric Pattern-Assisted Digital Scanning Techniques for Construction of Full Arch Implant Prosthesis Framework: A Crossover Study","GPA Scan","Inclusion Criteria:\n\nAdults aged 30 to 70 years\n\nCompletely edentulous mandible\n\nPresence of four osseointegrated implants in the lower jaw\n\nGood oral and general health\n\nWillingness to participate and provide written informed consent\n\nAvailability for all study appointments\n\nExclusion Criteria:\n\nSystemic diseases or conditions that affect bone healing or implant integration\n\nPresence of oral inflammation, infection, or soft tissue abnormalities at implant sites\n\nHistory of bruxism or parafunctional habits\n\nInability to understand or comply with study procedures",true,"ALL","30 Years","70 Years",{"count":91,"type":92},4,"ESTIMATED","INTERVENTIONAL",[95],"NA","This clinical trial aims to compare three different impression techniques used to fabricate full-arch implant-supported dental prostheses. Accurate impressions are essential to ensure a passive and precise fit of the final prosthetic framework, which contributes to long-term implant success and patient comfort.\n\nIn this crossover study, participants with four osseointegrated dental implants in the lower jaw will undergo three types of impressions:\n\nConventional splinted impression using polyvinyl siloxane (PVS) material.\n\nStandard digital impression using an intraoral scanner.\n\nGeometric pattern-assisted digital impression, which incorporates a visual reference pattern to improve scan alignment and accuracy.\n\nEach participant will receive all three impression techniques in a randomized sequence, at different time points. The accuracy of each method will be assessed by evaluating the passivity of the resulting prosthetic frameworks using two methods: (1) digital superimposition analysis to measure three-dimensional (3D) spatial deviation, and (2) the clinical \"one-screw test\" to detect misfit.\n\nThe study seeks to determine whether digital scanning, particularly with geometric pattern assistance, can provide accuracy comparable to or better than conventional methods. Findings may guide improvements in digital prosthodontic workflows and support more efficient, predictable treatment outcomes.",[98,99,100,101],"Edentulous Jaw","Dental Prosthesis, Implant-Supported","Prosthodontics","Dental Implantation, Endosseous",[103,104,105,106,107,108,109,110,111],"Digital impression","Full-arch implant","Geometric pattern","Prosthesis framework","Intraoral scanner","Splinted impression","CAD\u002FCAM prosthodontics","Passive fit","Dental implants","2025-07-13",{"date":114,"type":115},"2025-07-15","ACTUAL",{"date":117,"type":92},"2025-09-30",{"date":119,"type":92},"2026-09-15",{"name":76,"class":6},1]