Comparison of screw access channel obturation on the retention of implant-supported fixed restorations
Author(s):
Abstract:
Introduction
A limited number of studies have evaluated factors influencing the retention of fixed prostheses cemented to implant abutments. The aim of this study was to compare the effect of varying degrees of screw access channel obturation on retention of implant-supported cast fixed restorations.Materials and Methods
In this experimental study, 40 implant abutments with a diameter of 4.5 mm were connected to implant analogues and mounted in acrylic resin blocks. The samples were divided into four groups randomly. In groups 1, 2 and 3, the access channels were obturated with a 1-mm, 2-mm and 3-mm free space and in group 4 the access channels were obturated completely with silicone material and the copings were cemented with a temporary bonding agent containing eugenol. After thermocycling, the retention of the samples was evaluated in a universal testing machine under 5000 N at a strain rate of 5 mm/min. Data were analyzed with one-way ANOVA and post hoc LSD test (α = 0.05).Results
The mean retention for the group with abutment access channel completely obturated was less than that in others. One-way ANOVA showed statistically significant differences between the groups (p value = 0.032). The difference between the group with completely obturated access channels and the other groups was significant (p value 0.05).Conclusion
The retention of castings cemented to implant abutments might be influenced by the obturation mode of screw access channel. Complete obturation of access channel with poly vinyl siloxane results in a decrease in retention.Language:
Persian
Published:
Journal of Isfahan Dental School, Volume:12 Issue: 1, 2016
Pages:
81 to 88
magiran.com/p1543052
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!