the effects of denture cleansing solutions on the retention of attachments of implant supported overdentures

statement of the problem: implant-retained overdenture can improve the stability of dentures and prevent bone loss. overdenture-wearing patients need special hygiene care. purpose: the aim of this study was to evaluate the effects of various denture cleansers on the retention of dio orange o-rings. method and materials : in this experimental study, 40 dio orange o-rings were divided into 4 groups (10 o-rings each) and each group was soaked for equivalent of 6 months in the following solutions: 5.25% naocl (1:10 dilution), corega cleanser tabs, professional cleanser tabs and water (as the control group). after 6 months, o-rings were tested for 2inch/minutes of tensile force. the peak load-to-dislodgement was recorded. data were imported to spss18 and were analyzed by one-way anova and tukey hsd test ( p ≤ 0.05). results: denture cleansing solutions have significant effects on the reduction of retentive value of o-rings ( p ≤ 0.001). corega tabs caused the reduction of 15.7% (9.91±0.53 n) in the retentive value of o-rings and professional tabs caused 15% (10.00±0.86 n). naocl caused significant decrease (48%) in retentive value of o-rings (6.10±0.91 n in comparison with the control group (11.76±1 n). conclusion: this in-vitro study demonstrated that the retention of o-rings was affected when soaked in cleansing solutions. naocl caused more reduction in retentive value compared to effervescent cleansers and would not be recommended for cleansing o-rings. these results should be interpreted clinically and the role of other factors in the retention of o-rings should be considered in order to recommend the best cleanser for o-ring overdentures.