title: The Effects of Denture Cleansing Solutions on the Retention of Attachments of Implant Supported Overdentures.
abstract: BACKGROUND
  Implant-retained overdenture can improve the stability of dentures and prevent bone loss. Overdenture-wearing patients need special hygiene care.
  
  
  OBJECTIVE
  The aim of this study was to evaluate the effects of various denture cleansers on the retention of Dio orange O-rings.
  
  
  METHODS
  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).
  
  
  CONCLUSIONS
  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.
authors.affiliation: Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran;
authors.forename: Reza
authors.initials: R
authors.lastname: Derafshi
authors.affiliation: Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran;
authors.forename: Mina
authors.initials: M
authors.lastname: Mohaghegh
authors.affiliation: Postgraduate Student in Orthodontics, Orthodontic Research Centre, Student Research Committee, Dept. of Orthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran;
authors.forename: Maryam
authors.initials: M
authors.lastname: Saki
authors.affiliation: Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran;
authors.forename: Anahita
authors.initials: A
authors.lastname: Safari
authors.affiliation: Undergraduate Student, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran;
authors.forename: Mohammad
authors.initials: M
authors.lastname: Rabee Haghighi
keywords: Denture cleanser; Denture retention; Implant overdenture; O-ring attachment