Evaluation of Effectiveness of Bone Ring Technique in One Stage Surgery of External Maxillary Sinus Lifting With Implantation: A Prospective Case Series
| Registry | NCT07619846, acronym BRT-SINUS |
|---|---|
| Status | Recruiting |
| Phase | Not applicable |
| Study type | Interventional; na, single group, masking: none, treatment |
| Enrollment | 10 (Estimated) |
| Sponsor | Damascus University (Other) |
| Conditions | Maxillary Deficiency, Bone Resorption |
| Interventions | Bone Ring Technique (BRT) (Procedure) |
| Dates | start 2026-05-31, primary completion 2027-02-21 (estimated), completion 2027-03-21 (estimated), first posted 2026-06-02, last updated 2026-09-01 |
| Locations | 1 site in Syria |
Related Papers Related Patents Related Grants Related Experts
All trials for Maxillary Deficiency All trials for Bone Resorption All trials of Bone Ring Technique (BRT)
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.
The Bone Ring Technique (BRT) was introduced by Giesenhagen (2004) to address severe posterior maxillary atrophy. In this prospective single arm case series, after obtaining ethics approval (DN 28102025 542, Damascus University), ten patients with residual bone height ≤4 mm will undergo: harvesting of an 8 mm cylindrical autogenous bone ring from the mandibular symphysis using trephine burs; creation of a lateral window in the maxillary sinus using a straight handpiece with a diamond round bur; meticulous elevation of the Schneiderian membrane; placement of the bone ring; simultaneous insertion of a dental implant (ICX) through the ring into the native ridge; filling of the defect with xenograft (bovine) particles; coverage with a collagen membrane; and suturing Primary stability will be measured immediately after implantation using resonance frequency analysis (Mega ISQ II).
CBCT scans (PaX i3D, VATECH) will be performed preoperatively, at 1 week, and at 6 months to quantify vertical bone gain (distance from implant shoulder to sinus floor) and peri implant bone density (Hounsfield like units).
Clinical follow up includes suture removal at 7 10 days and assessment of implant survival/success at 6 months (absence of mobility, pain, radiolucency, suppuration, crestal bone loss <1.5 mm).
Results will be submitted for publication in a peer reviewed journal.
| Arm | Type | Interventions | Description |
|---|---|---|---|
| Bone Ring Technique (BRT) | Experimental | Procedure: Bone Ring Technique (BRT) | 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. |
Sex: All, ages: 18 Years to 70 Years
Inclusion Criteria: * Need for dental implant in posterior maxilla (premolar/molar). * Residual alveolar bone height ≤4 mm on preoperative CBCT. * Age ≥18 years. * Controlled systemic health. * Able to comply with procedures and follow up. * Good oral hygiene. * Signed written informed consent. Exclusion Criteria: * Uncontrolled systemic disease. * Head/neck radiotherapy. * Bisphosphonate therapy >3 years. * Autoimmune disease affecting healing. * Pregnancy/lactation. * Active maxillary sinus pathology (sinusitis, cysts, polyps, tumours). * Heavy smoking (>10 cigarettes/day). * Severe bruxism.
| Facility | City | Country | Status |
|---|---|---|---|
| Oral and Maxillofacial Surgery Hospital, Faculty of Dentistry, Damascus University, Mezzeh Highway, Damascus, Syria | Damascus, Governorate | Syria | Recruiting |