Showing 3 results for Razeghi
S Alirezaei, E Razeghi, M Rezaie, N Moezi Ghadim, L Sabet Ghadam,
Volume 3, Issue 2 (4-2018)
Abstract
Background and Aim: Halitosis, candidiasis, and metallic taste are some of the oral complications in chronic renal failure patients undergoing dialysis. The aim was to evaluate the prevalence of oral manifestations and the related factors in hemodialysis patients at selected hospitals of Tehran in 2016.
Materials and Methods: This cross-sectional study was performed through observation, examination, interviewing, reviewing the medical records, and completing the information form. Oral manifestations were examined with indices of halitosis, metallic taste, and candidiasis. The presence of each indicator was considered as oral manifestations, and the measurement was standardized and performed by a student under the supervision of the respective professors. The training required for measurements was provided by the supervisor and the advisor. The reliability was measured in a seven-day pilot study. An organoleptic method was used to measure halitosis. The diagnosis of metallic taste and candidiasis was made through interviewing and observation, respectively.
Results: The study was performed on 250 patients (58.8% male and 41.2% female) with the mean age of 59 years (17 to 88 years). The average duration of dialysis was 62 months. Oral manifestations were present in 91.2% of patients. The most common oral manifestation was halitosis (90%), followed by metallic taste (12%), and candidiasis (10.8%). The incidence of candidiasis was higher in older patients and denture wearers (P≥0.05). Halitosis and metallic taste did not relate to the studied factors (P≥0.2 and ≥0.9).
Conclusion: The prevalence of oral manifestations in chronic kidney failure patients undergoing hemodialysis is high. Etiologic studies are recommended to understand the causes and to reduce the complications.
Z Tavakolinejad, Hr Razeghi, M Sadeghi,
Volume 6, Issue 1 (3-2021)
Abstract
Background and Aim: Orthodontic patients are at an increased risk of caries due to difficulty in plaque control. Antimicrobial agents, such as fluoride and chlorhexidine, can be useful in preventing tooth demineralization. The present study aimed to determine the effect of fluoride and chlorhexidine gels and their mixture on the shear bond strength (SBS) of orthodontic brackets.
Materials and Methods: In this ex-vivo study, 70 premolars were divided into seven groups. The first group was considered as the control. The second, third, and fourth groups were first etched with 37% phosphoric acid and then pretreated with chlorhexidine, fluoride, and fluoride-chlorhexidine gels, respectively. The brackets were then bonded. In the fifth, sixth, and seventh groups, the enamel surface was etched after pretreatment, and then, the brackets were bonded. After mounting the teeth, SBS was measured using the Instron machine. Data were analyzed using one-way analysis of variance (ANOVA) and Tamhane's T2 test (α≤0.05).
Results: The mean SBS was 19.7 MPa in the control, 11.1±2.5 MPa in the second, 11.8±3.6 MPa in the third, 21±7.5 MPa in the fourth, 19.4±9 MPa in the sixth, and 14.1±6.7 MPa in the seventh group with no statistically significant differences. However, there was a statistically significant decrease in the mean SBS (8±5.2 MPa) of the fifth group (chlorhexidine before etching) compared to the control group (P=0.04).
Conclusion: The use of fluoride and chlorhexidine can be recommended to orthodontic patients because of antibacterial and anticaries properties and no significant decrease in the SBS of orthodontic brackets (except when chlorhexidine is used before etching).
Hr Razeghi Jahromi, M Sadeghi, F Iranmanesh, M Tashakori,
Volume 7, Issue 1 (2-2022)
Abstract
Introduction: Decontamination of gutta-percha (GP) cones is recommended before placement in the root canal system. However, the incidence of contamination is still a matter of debate. The present study aimed to evaluate the contamination of GP cones before and during clinical use by general dentists.
Materials and Methods: In this in vitro study, 120 GP cones (#20) were examined for incidence of contamination. First, 30 GP packages were opened under aseptic laboratory conditions, and two cones were randomly selected for the laboratory tests. Next, the initially sampled packages were distributed among 30 general dentists and then they were asked to use them clinically for 7 days and then the packages were collected for the microbial tests. The collected cones were placed in tubes containing thioglycolate medium and incubated at 37℃ for 21 days. Bacterial growth was detected by presence of turbidity and comparison with the control groups. A sample was collected from the tubes showing turbidity and plated in blood agar and also underwent Gram-staining, followed by colony counting. Data were analyzed using the Chi-square and paired sample t-test (alpha=0.05).
Results: None of the 60 samples from initial sampling of packages showed contamination. However, in secondary sampling after clinical use, 8.3% of GP samples were positive for contamination. There was a statistically significant difference in contamination of packages before and after clinical use (P= 0.02).
Conclusion: Within the limitations of this study, it can be concluded that GP cones can become infected after opening the package and in the process of clinical use.
