NCT04720495

One-stage Versus Two-stage Inverted U-shaped Ridge Splitting

One-stage Versus Two-stage Inverted U-shaped Ridge Splitting With Simultaneous Implant Placement for Treatment of Anterior Maxillary Alveolar Ridge Undercut (a Comparative Randomized Clinical Trial)

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 14 (actual)
• Sponsor: Hams Hamed Abdelrahman · Academic / Other
• Sex: All
• Age: 20 Years – 45 Years
• Healthy volunteers: Not accepted

Summary

Fourteen patients having anterior maxillary undercut defect were selected to match a list of inclusion and exclusion criteria. The participants were randomly allocated using a computer system into two groups: Group A undergo inverted U-shaped maxillary ridge splitting using piezotomes with simultaneous implant placement in the same surgery. Group B undergo inverted U-shaped maxillary ridge splitting as a first stage and after four weeks, ridge expansion and implant placement will be performed with only envelop flap. Assessment included measurements of bone gain at the undercut defect and bone density labial to implants in each group from the cone-beam computed tomography

Conditions

• Maxillary Ridge Augmentation

Interventions

Type	Name	Description
PROCEDURE	One stage ridge splitting with simultaneous implant placement	A full mucoperiosteal flap was raised using the sharp periosteal elevator to expose the bone crestally and buccally. An inverted U-shaped bone cut, down to the cancellous bone, was done in the undercut area with a piezoelectric device. The horizontal bone cut was made apical to the most concave point in the undercut area with a distance of 3 mm. The two vertical bone cuts were placed at least 1 mm away from the adjacent roots and extended beyond the undercut area. The released bone end was minimally elevated using a periosteotome through a greenstick fracture. All implants were installed with the implant shoulders flush to the bone level using a low-speed drilling procedure.
PROCEDURE	Two-stage ridge splitting with implant placement	The first surgery is the same as one stage ridge splitting Four weeks later, after revascularization between the bone block and the mucoperiosteum, the second surgery will be performed. A crestal incision was done and the envelope flap slightly elevated to preserve the blood supply. The implants will be placed in the same manner as one stage ridge splitting

Timeline

• Start date: 2019-10-01
• Primary completion: 2020-09-30
• Completion: 2020-09-30
• First posted: 2021-01-22
• Last updated: 2021-01-22

Locations

1 site across 1 country: Egypt