[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100618901":3},{"organization":4,"outcomesModule":7,"designInfo":14,"detailedDescription":13,"studyPopulation":13,"armGroups":23,"interventions":33,"overallOfficials":13,"centralContacts":46,"locations":52,"responsibleParty":69,"collaborators":13,"id":71,"slug":13,"hasResults":72,"nctId":73,"briefTitle":74,"officialTitle":75,"acronym":13,"eligibilityCriteria":76,"healthyVolunteers":72,"sex":77,"minAge":78,"maxAge":79,"enrollmentInfo":80,"targetDuration":13,"studyType":83,"phases":84,"briefSummary":86,"conditions":87,"keywords":13,"overallStatus":55,"whyStopped":13,"lastUpdateSubmitDate":89,"lastUpdatePostDateStruct":90,"startDateStruct":93,"completionDateStruct":95,"leadSponsor":97,"locationsCount":98},{"fullName":5,"class":6},"Medstar Health Research Institute","OTHER",{"primaryOutcomes":8,"secondaryOutcomes":13,"otherOutcomes":13},[9],{"measure":10,"description":11,"timeFrame":12},"Measurement of femoral stem subsidence at 6 weeks, 6 months, and 1-year post-operation","Measurement of femoral stem subsidence at 6 weeks, 6 months, and 1-year post-operation used radiographic evidence.","6 weeks, 6 months, and 1 year post operation",null,{"allocation":15,"interventionModel":16,"interventionModelDescription":13,"primaryPurpose":17,"observationalModel":13,"timePerspective":13,"maskingInfo":18},"RANDOMIZED","PARALLEL","TREATMENT",{"masking":19,"maskingDescription":13,"whoMasked":20},"DOUBLE",[21,22],"PARTICIPANT","OUTCOMES_ASSESSOR",[24,29],{"label":25,"type":26,"description":13,"interventionNames":27},"Collard stem","ACTIVE_COMPARATOR",[28],"Other: Collared Femoral Stem",{"label":30,"type":26,"description":13,"interventionNames":31},"Collarless stem",[32],"Other: Collarless Femoral Stem",[34,40],{"type":6,"name":35,"description":36,"armGroupLabels":37,"otherNames":38},"Collarless Femoral Stem","Patients will be randomized to one of two groups receiving either a collarless or collared femoral stem. Patients randomized to this group will receive a collarless femoral stem implant at time of surgery.",[30],[39],"Collarless",{"type":6,"name":41,"description":42,"armGroupLabels":43,"otherNames":44},"Collared Femoral Stem","Patients will be randomized to one of two groups receiving either a collarless or collared femoral stem. Patients randomized to this group will receive a collared femoral stem at the time of surgery.",[25],[45],"collared",[47],{"name":48,"role":49,"phone":50,"phoneExt":13,"email":51},"Miles Hollimon, B.S.","CONTACT","(202) 444-8766","miles.hollimon@medstar.net",[53],{"facility":54,"status":55,"city":56,"state":57,"zip":58,"country":59,"countryCode":60,"cosmosGeoPoint":61,"geoPoint":66,"contacts":67},"MedStar Georgetown University Hospital","RECRUITING","Washington D.C.","District of Columbia","20007","United States","US",{"type":62,"coordinates":63},"Point",[64,65],-77.03637,38.89511,{"lat":65,"lon":64},[68],{"name":48,"role":49,"phone":50,"phoneExt":13,"email":51},{"type":70,"investigatorFullName":13,"investigatorTitle":13,"investigatorAffiliation":13,"oldNameTitle":13,"oldOrganization":13},"SPONSOR","100618901",false,"NCT07337642","Comparing Collared and Collarless Femoral Stems in Primary Total Hip Arthroplasty","Comparing Collared and Collarless Femoral Stems in Total Hip Arthroplasty","Inclusion Criteria:\n\n* Adults (≥ 18 years old) scheduled for primary, uncemented THA using a cementless femoral stem\n* Diagnosis of primary osteoarthritis or other non-inflammatory degenerative joint disease.\n* Ability and willingness to comply with study procedures and follow-up schedule.\n* Ability to provide written informed consent\n\nExclusion Criteria:\n\n* Patients not indicated for a cementless THA\n* Prior surgery on the ipsilateral hip (e.g., prior THA, internal fixation, osteotomy)\n* Use of cemented or hybrid femoral components.\n* Revision THA or conversion THA\n* Active or prior infection of the hip joint.\n* Severe osteoporosis (T-score ≤ -2.5) or known metabolic bone disease.\n* Inability to complete follow-up or anticipated relocation out of the area.","ALL","18 Years","99 Years",{"count":81,"type":82},100,"ESTIMATED","INTERVENTIONAL",[85],"NA","This is a prospective randomized control trial comparing two collared and collarless femoral implants used in primary total hip arthroplasty. The specific aims of this trial are to:\n\nSA1: Prospectively assess clinical outcomes in patients undergoing primary total hip arthroplasty with a collared versus collarless femoral stem of the same design.\n\nSA2: Evaluate serial radiographs to quantify differences in subsidence between collared and collarless implant groups.\n\nSA3: Report and compare incidence rates of intraoperative and postoperative periprosthetic fractures and aseptic loosening following primary total hip arthroplasty with use of either a collared or collarless stem.\n\nHypothesis: The addition of a collar to the same designed triple-taper primary hip stem will lead to a reduction in subsidence and incidence of perioperative and periprosthetic femur fractures.",[88],"Primary Total Hip Arthroplasty","2026-01-12",{"date":91,"type":92},"2026-01-13","ACTUAL",{"date":94,"type":92},"2025-12-03",{"date":96,"type":82},"2027-12-31",{"name":5,"class":6},1]