[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100638909":3},{"organization":4,"armGroups":7,"interventions":14,"overallOfficials":20,"centralContacts":25,"locations":31,"responsibleParty":44,"collaborators":19,"id":46,"slug":47,"hasResults":48,"nctId":49,"briefTitle":50,"officialTitle":51,"acronym":52,"eligibilityCriteria":53,"healthyVolunteers":48,"sex":54,"minAge":55,"maxAge":56,"enrollmentInfo":57,"targetDuration":19,"studyType":60,"phases":61,"briefSummary":63,"conditions":64,"keywords":66,"overallStatus":70,"whyStopped":19,"lastUpdateSubmitDate":71,"lastUpdatePostDateStruct":72,"startDateStruct":75,"completionDateStruct":77,"leadSponsor":79,"locationsCount":80},{"fullName":5,"class":6},"Damascus University","OTHER",[8],{"label":9,"type":10,"description":11,"interventionNames":12},"Bone Ring Technique (BRT)","EXPERIMENTAL","Eligible patients with posterior maxillary atrophy (RBH ≤4 mm) will undergo a single surgical session. Preoperatively, CBCT will be performed. Under local anesthesia, the surgeon will harvest an autogenous bone ring from the chin (mandibular symphysis) using trephine burs. A lateral window will be created in the maxillary sinus wall using a straight handpiece with a diamond round bur. The sinus membrane will be elevated, and the bone ring will be placed into the sinus. A dental implant (ICX) will be inserted through the ring into the residual ridge. The defect will be filled with xenograft particles and covered with a collagen membrane. Sutures will be removed at 7-10 days. Patients will be followed for 6 months with clinical and CBCT evaluations.",[13],"Procedure: Bone Ring Technique (BRT)",[15],{"type":16,"name":9,"description":17,"armGroupLabels":18,"otherNames":19},"PROCEDURE","The Bone Ring Technique (BRT) is a one-stage surgical procedure that combines external maxillary sinus floor elevation with simultaneous dental implant placement. An autogenous bone ring is harvested from the mandibular symphysis using trephine burs. The sinus membrane is elevated via a lateral window approach created with a straight handpiece and diamond round bur. The bone ring is then placed into the sinus cavity, and a dental implant is inserted through the ring into the residual alveolar bone. The surgical site is augmented with xenograft particles and covered with a collagen membrane.",[9],null,[21],{"name":22,"affiliation":23,"role":24},"Khaldoun Darwich, professor of OMFS","Damascus University Syria","STUDY_DIRECTOR",[26],{"name":27,"role":28,"phone":29,"phoneExt":19,"email":30},"Adel Alassaf, Resident &MSc candidate in OMF","CONTACT","+963 949038706","sx19adel@gmail.com",[32],{"facility":33,"status":19,"city":34,"state":35,"zip":36,"country":37,"countryCode":19,"cosmosGeoPoint":38,"geoPoint":43,"contacts":19},"Oral and Maxillofacial Surgery Hospital, Faculty of Dentistry, Damascus University, Mezzeh Highway, Damascus, Syria","Damascus","Governorate","4671","Syria",{"type":39,"coordinates":40},"Point",[41,42],36.29128,33.5102,{"lat":42,"lon":41},{"type":45,"investigatorFullName":19,"investigatorTitle":19,"investigatorAffiliation":19,"oldNameTitle":19,"oldOrganization":19},"SPONSOR","100638909","using-chin-bone-rings-for-sinus-lifting-and-dental-implants-in-one-surgery-100638909",false,"NCT07619846","Using Chin Bone Rings for Sinus Lifting and Dental Implants in One Surgery","Evaluation of Effectiveness of Bone Ring Technique in One Stage Surgery of External Maxillary Sinus Lifting With Implantation: A Prospective Case Series","BRT-SINUS","Inclusion Criteria:\n\n* Need for dental implant in posterior maxilla (premolar\u002Fmolar).\n* Residual alveolar bone height ≤4 mm on preoperative CBCT.\n* Age ≥18 years.\n* Controlled systemic health.\n* Able to comply with procedures and follow up.\n* Good oral hygiene.\n* Signed written informed consent.\n\nExclusion Criteria:\n\n* Uncontrolled systemic disease.\n* Head\u002Fneck radiotherapy.\n* Bisphosphonate therapy \\>3 years.\n* Autoimmune disease affecting healing.\n* Pregnancy\u002Flactation.\n* Active maxillary sinus pathology (sinusitis, cysts, polyps, tumours).\n* Heavy smoking (\\>10 cigarettes\u002Fday).\n* Severe bruxism.","ALL","18 Years","70 Years",{"count":58,"type":59},10,"ESTIMATED","INTERVENTIONAL",[62],"NA","This study evaluates the Bone Ring Technique, a single stage procedure that combines external sinus floor elevation and dental implant placement using an autogenous bone ring harvested from the chin. Ten patients with residual alveolar bone height ≤4 mm in the posterior maxilla will be enrolled. Implant stability (ISQ), vertical bone gain, peri implant bone density, and implant survival will be assessed over 6 months. The aim is to reduce treatment time and surgical interventions compared to traditional two stage approaches.",[65],"Severe Alveolar Bone Atrophy of the Posterior Maxilla With Residual Bone Height ≤4 mm",[67,68,69],"Bone Ring Technique","Maxillary Sinus Floor Elevation","Dental Implant","NOT_YET_RECRUITING","2026-06-03",{"date":73,"type":74},"2026-06-04","ACTUAL",{"date":76,"type":59},"2026-05-31",{"date":78,"type":59},"2027-03-21",{"name":5,"class":6},1]