No abstract

Purpose To evaluate and compare the alterations in retention of three Locator attachments after immersion in various denture cleansers at defined time intervals. Materials and Methods Two implants were embedded in an acrylic block. Pink, blue, and clear Locator attachments (n = 10 for each subgroup) were immersed into three different cleansing solutions (Corega, Protefix and NaOCl) and tap water (control) at different time intervals that simulate 1 (T1), 6 (T2), and 12 (T3) months of clinical use. Universal testing machine set at a crosshead speed of 50 mm/min was used for pull‐out tests. After the immersion procedure, the peak force to dislodgement was recorded to demonstrate the changes in retention of Locator attachments. Data were analyzed using repeated‐measures ANOVA followed by Tukey's Honestly Significant Difference (HSD) tests (α = .05). Results All denture cleansing solutions affected the retentive values of all Locator attachments at defined time intervals (F = 4.299, p = 0.001). NaOCl affected all groups significantly after 12‐month immersion time (p = 0.001). The least retention loss at all subgroups was observed in Corega for clear Locator attachments (106.17 ± 5.21 N). The difference in retention values for pink attachments were not statistically significant for tap water, Protefix and Corega immersion at all time intervals (p > 0.05). Following NaOCl (blue; 33.31 ± 4.72 N, clear; 52.3 ± 8.5 N), tap water decreased the retention value of blue (41.14 ± 3.93 N) and clear (76.72 ± 8.42 N) Locator attachments at T3. Corega caused the least retention loss to clear attachments at T1 (106.17 ± 3.55 N). Conclusion The retention of Locator attachments decreases over time after exposure to various denture cleansing solutions. As NaOCl significantly decreased the retentive values of all attachments, patients must be informed about that disadvantage. Also, tap water remarkably decreased retentive ability of all attachments. Periodic addition of an effervescent tablet into tap water may be recommended to patients that wear implant retained overdentures with Locator attachments.

No abstract

SUMMARYAim: Dentin desensitizers can inhibit bonding between dentin and resin cements. The aim of this study is to examine if pre-treatment with a gluteraldehyde containing desensitizer and cavity varnish have a negative effect on shear bond strength of a resin cement between a full ceramic restoration and dentin. Material and Methods:Thirty extracted human molars' occlusal surfaces were ground to expose dentin; and were randomly

No abstract