Crestal Bone Response to Narrow vs. Regular Tie-Base in Subcrestal Implants

This 24-month randomized clinical trial evaluates peri-implant marginal bone changes at subcrestal implants restored with narrow versus regular tie-base abutments. The study investigates whether narrow or regular tie-base abutments influence peri-implant crestal bone remodeling over 24 months. This trial assesses the effect of abutment diameter (narrow vs. regular tie-base) on marginal bone stability at subcrestal implants after 24 months. We aimed to determine if abutment diameter impacts peri-implant marginal bone levels by comparing narrow and regular tie-base abutments in a 24-month RCT.

NCT Number	NCT07196228
Lead Sponsor	Menoufia University Collaborators: Mansoura University
Conditions	Bone Loss
Enrollment	40 participants
Start Date	2025-09-30
Primary Completion	2028-09-01 (estimated)
Study Completion	2028-12-01 (estimated)
Updated on ClinicalTrials.gov	2025-09-29