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Using Chin Bone Rings for Sinus Lifting and Dental Implants in One Surgery

Sponsor: Damascus University • ClinicalTrials.gov ID: NCT07619846

Registry updated: 2026-09-01

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Description

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.

Interventions

Bone Ring Technique (BRT) (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.

Eligibility criteria

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.

Conditions

Maxillary Deficiency Bone Resorption

Locations

Oral and Maxillofacial Surgery Hospital, Faculty of Dentistry, Damascus University, Mezzeh Highway, Damascus, Syria — Damascus, Governorate, Syria

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Official Source

Data sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

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