Evaluation of Different Attachment Systems on Single Implant Retained Mandibular Overdenture

Abstract

Purpose: This study was conducted to evaluate bone height around ball and socket and equator attachment in mandibular overdenture retained by single implant. Material and methods: Ten completely edentulous patients were selected with ages ranging from 50-60 years. Single implant was inserted for each patient and they all received heat cured acrylic dentures. The ten patients were divided into two groups, group (I) have received ball &socket attachment, group (II) received equator attachment. In the fitting surface of the lower denture two holes where made between 6 and 7 acrylic teeth and were filled with radioopaque material (amalgam). These represented posterior marker areas of evaluation the bone height. Evaluation of bone height around the implant and the posterior edentulous area which were marked for measurement was done by CAD_CAM CT at the time of attachment placement then after 3 months then 6 months. Results: In our study the comparison of equator and ball and socket attachments regarding the bone height changes around the implant revealed a significant difference. On the other hand there was an insignificant difference when comparing the distal extension area between them throughout the six months studies period. Conclusion: According to this study the equator attachment group indicates lesser marginal bone loss, as compared with the ball and socket attachment group, and there is no difference in bone resorption on the posterior area of the ridge between the two attachments.

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

“…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.This may be attributed to the equator is low profile resilient attachment performance which is superior to that of the ball and socket attachment in the implant. This resiliency of the equator permits denture movement in every direction and distribution of stress induce lower stress on bone around implant of equator than ball abutment.The results also comes in agreement with previous studies that showed that the decrease marginal bone loss around the implant in crestal region which was usually a significant indicator of implant health (11) .…”

Peri-Implant Marginal Bone Height Change and Patient’s Satisfaction Rehabilitated with Ball and OT Equator with Smart box Attachment for Retaining Mandibular Implant Overdenture

“…Sample size calculation was performed using G*Power version 3.1.9.7 (15) . Based on the results of a previous study (16) . A power analysis was designed to have adequate power to apply a two-sided statistical test to reject the null hypothesis that there is no difference between groups.…”