Abdolreza Jamilian; Hadi Parhiz; Hossein Rastegariyan; Saeedeh Nobakht
Abstract
Background and Purpose: Dental impressions often carry microorganisms that may cause cross infection from patients to dental staff. The purpose of this study was to evaluate the disinfecting efficacy of three commercially available disinfectants on Staphylococcus aureus. Methods and subjects: Impressions ...
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Background and Purpose: Dental impressions often carry microorganisms that may cause cross infection from patients to dental staff. The purpose of this study was to evaluate the disinfecting efficacy of three commercially available disinfectants on Staphylococcus aureus. Methods and subjects: Impressions were made of a sterile metal model of the maxillary arch that had been contaminated with Staphylococcus aureus. The Impressions were cultured before and after immersion in one of the following disinfectants: 15 minutes in Micro 10⁺ (5%), 5 minutes in Deconex (2%) and 10 minutes Glutaraldehyde (2%).
Results: Kruskal-Wallis test was used to evaluate the colony forming units (CFUs) of Staphylococcus Aureus.in each of the three groups. The same test showed that the colony forming units (CFUs) were reduced to Zero by all disinfectants.
Conclusion: This study showed that all disinfectants were fully successful in complete removal of Staphylococcus Aureus.
Rahman Showkatbakhsh; Abdolreza Jamilian; Ladan Eslamian
Abstract
Aim: The main goal of this study was to compare the effects of a differently designed functional appliance (R-appliance) with a bionator treated group in Class II Division I (C1 II Div I) cases.Materials and Methods: 22 patients (12 girls, 10 boys) treated with R-Appliance were selected as experimental ...
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Aim: The main goal of this study was to compare the effects of a differently designed functional appliance (R-appliance) with a bionator treated group in Class II Division I (C1 II Div I) cases.Materials and Methods: 22 patients (12 girls, 10 boys) treated with R-Appliance were selected as experimental group. Control group consisted of 22 patients (11 boys, 11 girls) treated with a bionator. All of the patients had a C1 II Div I malocclusion due to mandibular deficiency. Lateral cephalograms were analyzed at the beginning (T1, T 1) and the end of the study (T 2, T 2).Results: Paired T-test showed that SNB significantly increased in both groups. The same test revealed that IMPA was reduced in the R-appliances treated group by 4.5°±3.5° (P<0.001) but it was increased by 1.9°±3.9° (P<0.03) in the bionator group. Analysis utilizing T-test showed that the inter group difference of IMPA was statistically significant (P<0.01). SNA showed an increase of 0.1°±1.6° (P<0.9) in the R-appliance treated group; while, it was decreased for 0.4°±0.9° (P<0.1) in the bionator treated group.
Conclusions: Both groups were successful in advancement of mandible; however, the R-appliance achieved this result without retroclination of the lower incisors.