Reverse Torque and Wear of Internal Connections of Metal‐Based Abutments Under Cyclic Loading

• DOI: 10.1111/jerd.13425
• Publication Date: 2025-01-30T06:51:08Z
• Authors: Daher Antonio Que...; Mariana Itaborai ...; Kaden Thomas Ockey; Damian Jaewhan Lee; Fengyuan Zheng
• Keywords: Cyclic stress

ABSTRACT Objective Evaluate the reverse torque values and wear of internal connections caused by metal‐based zirconia abutments under cyclic loading. Material Methods Thirty implants were divided into three groups ( n = 10), based on connection systems: Interference‐fit cone‐screw (Cortical Master Flash MI Fit—MTA Cortical RP—MTB), Internal hexagon Titanium Connect AR—IH). Metal‐based tightened implant, crowns bonded using resin cement. All specimens underwent loading at 300 N 9 Hz for 1,000,000 cycles. Reverse torques assessed postloading, was analyzed scanning electron microscopy (SEM). Statistical analysis employed one‐way ANOVA values, with significant differences via Tukey test α 0.05). Results Significant in found among groups: MTA (24.9 N), MTB (24.1 IH (14.4 N). The group showed higher mean tension side (121.0) compression (112.6), a difference 8.4. Conclusion interference‐fit demonstrated significantly reduced loss morphology after loading, reflecting enhanced performance. Clinical Significance Although stability metal base to accurate, clinicians should be cautious about more when connections.