One-stage ridge splitting in the back lower jaw using two techniques
Official title: Evaluation of Endosseous Implants in One Stage Ridge Splitting Using the Conventional Technique Versus the Use of Piezo Surgery in the Posterior Mandible Region (Randomized Clinical Trial)
Run by Cairo University · NCT06891313 · Data updated 2026-11-12
This compares two surgical methods—piezo surgery versus conventional bone-disc cuts—to widen the narrow back lower jaw so dental implants can be placed in adults with limited ridge width.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 20 Years to 48 Years |
| Sex | All |
| Enrollment | 20 (estimated) |
| Sponsor | Cairo University Academic / other |
| Drugs / interventions | chemotherapy |
| Locations | 1 site (Cairo) |
| Status | Recruiting |
| Started | February 26, 2025 |
| Main results expected | July 30, 2025 |
| Study ends | October 31, 2025 |
| Registry record updated | July 16, 2025 |
| Trial ID | NCT06891313 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Adults with a posterior mandibular ridge 3–5 mm wide and at least 8 mm high, missing one or more posterior teeth and otherwise healthy enough for oral surgery, are the intended participants.
✕Probably not a fit
People who are heavy smokers (>20 cigarettes/day), have uncontrolled metabolic or bone diseases, prior head/neck radiotherapy, pregnancy, active oral pathology, or who are non-cooperative or have parafunctional habits are unlikely to benefit or be eligible.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This randomized interventional study assigns patients with narrow posterior mandibular ridges to ridge splitting with either piezoelectric surgery or conventional bone-disc osteotomies, with simultaneous implant placement. Patients undergo preoperative CBCT and diagnostic planning, local infiltration anesthesia, and a full-thickness mucoperiosteal flap with periosteal releasing incisions to permit tension-free closure. The study group uses piezo surgery inserts for osteotomies while the control group uses bone disc instruments, and all patients receive a CBCT at four months postoperatively to document bone changes. Outcomes include change in ridge width, healing and complications, and suitability of the sites for implants.
Why it matters
Potential benefit: If successful, the piezo approach could allow safer, more precise ridge widening with less bone trauma and improved conditions for implant placement.
How similar studies have gone: Piezoelectric ridge splitting and conventional osteotomy techniques have been reported in prior clinical series with encouraging results, but direct randomized comparisons remain limited.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Patients with mandibular residual alveolar bone height not less than 8 mm. * Alveolar bone width from 5mm to 3mm. * Both genders. * At least single missing tooth. * Previous failed implants. * Tapered or cylinder cross sectioned alveolar bone defect pattern. Exclusion Criteria: * Heavy smokers more than 20 cigarettes per day. * Patients with bone disease that may affect normal healing, example; hyperparathyroidism. * Patients had radiotherapy and chemotherapy in head and neck. * Patients had neoplasms in sites to be grafted. * Patients with Metabolic diseases uncontrolled diabetic patients, Glycated hemoglobin (Hb A1c) more than 7 mg\\dl. * Pregnant females. * Patients with Para functional habits, apprehensive and non-cooperative. * Bone pathology related to the site to be grafted. * Psychological problems, stress situation (socially or professionally), emotional instability, and unrealistic patients' expectations. * Intraoral soft and hard tissue pathology. * Systemic condition that contraindicates implant placement. * Under the age of 18 years. * Hourglass defects or defects with bone concavities and or undercuts.
Where it's running
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Faculty of Dentistry Cairo University
Cairo, Egypt Recruiting
Study contacts
- Study coordinator: Mohannad A. Ismail, MSc.
- Email: mohannadahmed@hotmail.com
- Phone: 01222968444
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.