![]() ![]() 95% of them had received blood-contaminated impressions. Irrespective of the disinfection status of the received impressions, 50% of the responding dental technicians disinfected all impressions. 24.7% of dentists did not inform the laboratory of disinfection. 37.2% rinsed the impressions with water, and 2.6% always brushed debris away, before disinfection. A wide range of solutions, at different dilutions of the same product, was used by the dentists to disinfect dental impressions. Results Questionnaire return rates of 42.1% and 31.2% were recorded for dentists and dental technicians respectively. Method Dentist (n = 200) and dental technician (n = 200) potential participants, selected at random from the registers held by the General Dental Council, were invited to complete an anonymous postal questionnaire that sought to establish current practices and perceived effectiveness of impression disinfection. Objective To ascertain, from the perspectives of dentists and dental technicians, current impression decontamination and disinfection practices with, in the case of the technicians, an estimate of the relative prevalence of contaminated voids within apparently disinfected impressions. Uncertainty of impression disinfection risks both the health of the receiving dental technician and potential repeat disinfection of an already disinfected impression with detrimental consequences for its dimensions. Spraying with aloe vera for 7 minutes was proved to be the most effective disinfection procedure without altering dimensional stability.Īloe vera Cast Dimensional Stability Disinfectant Irreversible Hydrocolloid.Introduction The responsibility of ensuring impressions have been cleaned and disinfected before dispatch to the dental laboratory lies solely with the dentist. There was a statistically significant difference in the increase of the mean anteroposterior (AP) and cross arch (CA) dimension after 3 and 7 minutes immersion in aloe vera. Complete elimination of all the microorganism cells after 7 min immersion and spray disinfection. albicans after 3 minutes of immersion in aloe vera and after 3 minutes spray disinfection. We found out that there is a mean percentage reduction in colony count of S. Statistical analysis of data was determined by analysis of variance. Dimensional stability was determined from the mean percentage deviation of three measurements that were taken between the fixed points on the casts using a traveling microscope and compared with corresponding measurements from the master model and controls. The efficacy of the disinfection procedures against Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans was evaluated by determining the number of colony-forming units (CFU) recovered after disinfection of alginate discs inoculated with 1x106 CFU for defined intervals with aloe vera solution (99.96%). ![]() ![]() The need to use a natural alternative for disinfecting dental impression materials, which should be biocompatible and effective, led us to evaluate the efficacy of Aloe vera as a disinfectant by immersion and spray method on alginate impression material and its effect on the dimensional stability of the resultant gypsum cast. ![]()
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