MECHANICAL EFFECT OF SIMULATED MARGINAL BONE RESORPTION ON NARROW DIAMETER IMPLANT IN MANDIBULAR RETAINED OVERDENTURE (IN-VITRO STUDY) | ||
| Alexandria Dental Journal | ||
| Articles in Press, Accepted Manuscript, Available Online from 06 October 2025 PDF (900.99 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/adjalexu.2025.388014.1630 | ||
| Authors | ||
| Mahmoud Mohamed Abbas* 1; Eman Zaghloul Alrafah2; Sara M Kamal3 | ||
| 1BDS, 2017, Faculty of Dentistry, Pharos University, Alexandria, Egypt | ||
| 2Professor of Prosthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt | ||
| 3Lecturer of Prosthodontics, Faculty of Dentistry, Alexandria University, Alexandria, Egypt | ||
| Abstract | ||
| Background: Marginal bone resorption affects implant stability and long-term success of mandibular overdentures. This study evaluates the biomechanical impact of bone resorption on narrow-diameter implants (NDIs) using Ball & Socket attachment systems. Purpose: To assess the mechanical effect of simulated marginal bone resorption on NDIs supporting mandibular overdentures and evaluate strain distribution using Ball & Socket attachments. Method: Fourteen epoxy resin models were divided into two groups—normal and resorbed bone. Each model received two NDIs supporting mandibular overdentures with Ball & Socket attachments. Strain gauges measured stress distribution under unilateral and bilateral loading. Statistical analysis assessed the impact of bone loss and loading conditions on strain values. Results: Bone resorption significantly increased strain values (p < 0.001), especially under unilateral loading. The Ball & Socket attachment system maintained consistent performance across bone conditions (p > 0.05). Resorbed bone models exhibited the highest strain values, emphasizing the critical importance of bone preservation for implant stability. Conclusion: Marginal bone resorption increased significantly strain around NDIs supporting mandibular overdentures with Ball & Socket attachments .proper occlusal load management and bone preservation are critical as ball attachments showed compromised load distribution capacity in atrophic cases. These findings emphasize that preventive strategies should prioritize minimizing bone loss to ensure long-term prosthetic success. | ||
| Keywords | ||
| Marginal bone resorption; Narrow diameter implant; Implant retained overdenture; Ball & Socket attachment; Unilateral and bilateral loading | ||
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