engleski

A Pilot Study of Mandibular Overdentures Supported by Roxolid-Alloy Mini Implants with Optiloc Retention

Objective of Investigation: Mandibular complete dentures in edentulous patients with atrophied ridges usually lack stability and retention, leading to inability to chew all kinds of food. Four mini-implants made from Ti90Va4Al6 alloy inserted interforaminally, with rubber O-ring in metal housings for denture retention have proven to be beneficial in such patients. Recently, new MDI system made from Roxolid alloy (Ti85, Zr15) with a new Optiloc system for retention (PEEK material in metal housings) was released on the dental market. The new system should allow better mechanical properties of MDIs and better and more durable retention. The aim was to compare treatment effects and one- year results between patients with new MDI system (N-MDI) and patients with conventional MDI system (C-MDI) considering self-perceived chewing function (CF) and oral health-related quality of life (OHRQoL). Methods used: Ten patients received four Roxolid MDIs interforaminally with Optiloc system, epresenting a study group (N-MDI), and another ten patients received conventional MDIs with rubber O-ring in a metal housing, representing a control group (C- MDI). The OHRQoL was assessed using the OHIP-EDENT questionnaire ; the CF using the CF questionnaire in both groups: before treatment, one month after treatment and after one year in function. Results: All patients reported significantly better OHRQoL better CF, high effect size of the treatment and there was no significant differences between groups. However, at the one year stage, the MDI group with Optiloc system had slightly better CF than the O-ring MDI group. Only one MDI was lost in the O-ring group. Conclusion: Both groups of patients showed high effect size of a treatment, with consistent results over the one-year period of observation. The N-MDI group had slightly better self-reported chewing function after one year.

mini implant ; mandibula ; overdenture

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