In selecting an impression disinfectant, material compatibility is a requirement (see Table 1). It should be noted that no single disinfectant is compatible with all impression materials. Tuberculocidal hospital disinfectants with both hydrophilic and lipophilic virus kill are recommended. Personal protective equipment must be utilized and adequate ventilation in place when hazardous materials, such as disinfectants, are used. Optimally, impressions should be decontaminated through chairside disinfection immediately after removal from the patient`s mouth. Dental impressions are included in this category. Under OSHA`s 1991 Bloodborne Pathogens Standard, items contaminated with saliva in dental procedures are considered potentially infectious. Microorganisms can be transferred from contaminated impressions to dental casts, and oral bacteria can remain viable in set gypsum materials for up to seven days. Although most infectious agents do not survive for extended periods outside the body, many pathogens, if present in high enough numbers, can survive several days in protein-containing body fluids. Such fluids can contain viral and bacterial pathogens, including HIV and hepatitis A, B, and C viruses. 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.Editor's note: Please read " Dental impression disinfection recommendations and best practices" on Dental Economics for updated (2022) information on the topic of infection control and dental impressions.ĭental impressions are among the items that are considered potentially infectious.ĭental impressions invariably are contaminated with patient saliva or blood. 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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