Study the Effect of Two Different Types of Attachment Systems on strain of Mandibular complete Overdentures Retained by Midline Implant

Abstract

Aim: This study was conducted to evaluate the effect ball and equator attachments strain (invitro study) of mandibular over denture retained by single midline implant for completely edentulous patient. Subjects and methods: Ten complete lower dentures have ball attachment and another ten complete lower dentures have equator attachment were constructed on ten acrylic models covered by rubber material to simulate oral mucosa have single midline implant, strain were evaluated around the mandibular midline implant and in the posterior area using strain meter after unilateral and bilateral loading by universal testing machine for each abutment individually. Results: When comparing strain in the peri implant area under unilateral and bilateral loading there is a significant increase in strain for ball than equator with insignificant increase in strain in the posterior area. Conclusion: According to this study strain around implant and posterior residual ridge of ball attachment more than equator one for mandibular over denture retained by single midline implant.

Comparative clinical study of conventional dental implant and mini dental implant‐retained mandibular overdenture: A 5‐ to 8‐Year prospective clinical outcomes in a previous randomized clinical trial

“…Higher MBLC in Group 3 might be relate to the ball attachment, the higher profile attachment when compared with OT Equator ® . These results were supported by Salem et al 31 reported the significant greater strain in ball attachment than OT Equator ® . The more resilience in OT Equator ® allowed the more movement in denture and…”