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Dentomaxillofacil Radiology, Pathology and Surgery - Volume:11 Issue: 2, Spring 2022

Journal of Dentomaxillofacil Radiology, Pathology and Surgery
Volume:11 Issue: 2, Spring 2022

  • تاریخ انتشار: 1401/05/30
  • تعداد عناوین: 6
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  • Farzane Ostovarrad, Pedram Javidi, Rasoul Tabari Khomeiran, Danial Asna Ashari, Sarah Mohammadi, Yasaman Mousavi Azad* Pages 1-6
    Introduction

    Estimating the appropriate time for orthodontic treatment is a crucial factor. Given the earlier maturation of sinuses rather than maxillomandibular growth, finding the exact relationship between the growth of the jaws and frontal sinuses is considered to be a helpful element in Orthodontic treatment.

    Materials and Methods

    This is a descriptive-analytical study, conducted on 60 lateral cephalometric radiographs (18 male-42 female) to estimate the relation between frontal sinus dimension and prognathism/retrognathism of jaws.   The ANB-SNB-SNA angles and Wit’s analysis of the samples were divided into three- jaw I, II, and III classes, indicating the prognathism or retrognathism. The area of Frontal sinus was plotted on the tracing paper and transferred to the Auto CAD software.Independent samples t-test and Kruskal-Wallis test were used to compare the area of frontal sinus to the mandibular and maxillary position.

    Results

    The statistically difference between frontal sinus area and gender, between the mean area of the frontal sinus and maxillomandibular anterior-posterior orientation, was reported as p=0.294 and p=0.352/p=0.261, respectively.

    Conclusion

    There was no significant relation between the frontal sinus dimension and maxillary and mandibular prognathism/retrognathism. Consequently,  frontal sinus dimension cannot be used for estimating maxilla and mandibular growth.

    Keywords: Prognathism Retrognathia Frontal Sinus
  • Mohammad Javad Jabbari Sendi, Bardia Vadiati Saberi, Dorsa Rahi* Pages 7-13
    Introduction

    Toothbrushes can have a significant role in the transmission of diseases. This study aimed to assess the type and amount of toothbrush microbial contamination and the associated factors.

    Materials and Methods

    In this comparative cross-sectional descriptive study, 36 students were randomly selected. A modified bass brushing technique was prescribed and participants were given a toothbrush and toothpaste in a sterilized package. After five days, the brushes were gathered and the bristles were stored in Nutrient Broth. Specimens were inseminated in blood Agar, chocolate agar, and Mac conkey medias. Biochemical and microbiological tests were performed and bacterias were identified. Contaminations with <10,000 colonies were considered as low contaminated, between10,000 to 30,000 colonies were considered as medium contaminated, and 30,000< colonies were considered as highly contaminated. Data were analyzed using SPSS 16 by applying Kruskal-Wallis and Fisher tests at a significance level of 0.05.

    Results

    16(44.4%) toothbrushes belonged to females and 20 (55.6%) to males. The average age of participants was 23.70±2.43. All the toothbrushes were contaminated. Streptococcus Mutans had the highest and Streptococcus Sanguis had the lowest levels. A significant relation was observed between the amount of toothbrush contamination and toothbrush storage place, time of flossing, usage of mouthwash, brushing the palate and tongue, drying the toothbrush, washing with warm water, and having a cap.

    Conclusion

    Sufficient care should be taken in the storage, washing, and drying of the toothbrush; using mouthwash; brushing the tongue, and not using toothbrush caps to prevent toothbrush contamination.

    Keywords: Oral Hygiene, Streptococcus sanguis, Toothbrushing
  • Bardia Vadiati Saberi, Maryam Haddadian*, Niloufar Rasooli Pages 14-17
    Introduction

    The aim of this study was to identify the antibacterial components in the ethanol extraction of Aloe vera against four clinically frequent pathogenic 
    bacteria.

    Materials and Methods

    In this in-vitro study, Aloe vera extraction was prepared by dissolving 500 grams of the powder in 5L of 95% ethanol. The antibacterial activity of the extraction against Staphylococcus aureus, Streptococcus, Escherichia coli and Salmonella was tested using Agar well diffusion technique. The antibacterial activity was assessed using chromatography to determine Minimum Inhibitory 
    Concentration (MIC) and Minimum Bacterial Concentration (MBC). 

    Results

    The Acetoacetate component of Aloe vera extraction inhibited the growth of studied bacteria. And other components had no inhibitory activity. The Acetoacetate component of Aloe vera extraction had more inhibitory effect on gram-positive bacteria compared to the gram-negative bacteria. (P=0.001)

    Conclusion

    Aloe vera has anti-bacterial activity and can be an alternative to pharmaceutical medicines. Also, it can be an adjacent approach to maintain and improve oral health.

    Keywords: Aloe, Agar, Oral Health Gram-Negative Bacteria, Chromatography
  • Bardia Vadiati Saberi, Maryam Haddadian* Pages 18-22
    Introduction

    Biological Width is needed to maintain the health of gingiva around teeth that need restoration. Crown Lengthening (CL) surgery can be used to prevent 
    invading the BW by sub-gingival restoration. The aim of this study was to evaluate gingival indices before and after CL surgery.

    Materials and Methods

    In this analytical-longitudinal study, 23 teeth of 18 patients referred to the School of Dentistry of Guilan University of Medical Sciences were analized. Patients underwent CL surgery. Plaque Index (PI), Probing Depth (PD), Gingival Index (GI) and Papillary Bleeding Index (PBI) were measured and recorded at the beginning of the study (before CL surgery), 1 week, 1 month and 3 months after the surgery. Patients were referred to restorative dentist at the end of the study. All tests were performed using SPSS software version 24 at the significance level of 0.05.

    Results

    in this study PD consistently decreased significantly. (P = 0.001) PI increased in the first 1 month after surgery and decreased from the first to the third month after surgery. PI was significantly reduced during the study. (P <0.001) GI increased in the first 1 week after surgery and decreased from the first week to the third month after surgery. GI was significantly reduced during the study. (P <0.001) PBI increased in the first 1 week after surgery and decreased from the first week to the third month after surgery. PBI was 
    significantly reduced during the study. (P <0.001)

    Conclusion

    All measured indices decreased significantly after crown lengthening surgery. Therefore, it can be concluded that CL helps to improve and stabilize periodontal indices.

    Keywords: Crown Lengthening Periodontal Index Dental Plaque Index
  • Farnoosh Khaksari*, Mohammad Danesh Ardakani, Seyed Hosein Tabatabaei Pages 23-28
    Introduction

    Myofibroblasts are the main stromal components that constitute the desmoplastic reaction of host cells to inductive stimuli exerted by tumor cells. The purpose of this study was to evaluate the score of myofibroblasts using α -smooth muscle actin marker (α–SMA) in mucoepidermoid carcinoma (MEC) in comparison with pleomorphic adenoma (PA)and study the amount presence of these cells in those tumors.

    Materials and Methods

    The study included 20 cases of mucoepidermoid carcinoma and 20 cases of pleomorphic adenoma, using paraffin-embedded blocks that are appropriate for immunohistochemistry staining. 5 cases of mucocele and 5 cases of oral squamous cell carcinoma served as the negative and positive control. The expression of α -smooth muscle actin marker was determined by the immunohistochemically stained section. Myofibroblasts presence was assessed by a semiquantitative scale based on the score of immunopositive staining(0,1+,2+and 3+). The data were analyzed statistically with SPSS (ver.24) statistical software and using Mann-Whitney, Chi-Square, and Spearman`s correlation tests.

    Results

    There are no significant differences in the mean score of positive cells for mucoepidermoid carcinoma and pleomorphic adenoma with mean and standard deviation (2.45±0.89) and (2.10±0.91) (Pvalue=0.182). Also, there are no significant differences between low and high grades of mucoepidermoid carcinoma (Pvalue=0.4).

    Conclusion

    In conclusion, despite the presence of α-SMA-positive myofibroblast cells in the connective stroma, PA capsule septa, and the stroma of MEC cases with different grades of malignancy, no significant difference was detected in the frequency of myofibroblast cells between the two groups.

    Keywords: ImmunohistochemistryMyofibroblastsCarcinoma
  • Saede Atarbashi-Moghadam, Niloofar Jalali, Soran Sijanivandi, Shaghayegh Dowdani* Pages 29-35
    Introduction

    Pigmented odontogenic lesions are rare; to date, only 60 cases have been reported in the literature. Melanocytes have been detected in a wide variety of odontogenic lesions. Several studies have discussed melanocyte presence and melanin production in odontogenic lesions, but its origin is still unclear. Therefore, the present systematic review aimed to gather information on such cases.

    Materials and Methods

    An electronic search was performed in PubMed Central’s database The search strategy was limited to human studies (case reports and case series) and full-text English articles published till June 2021. Irrelevant articles were omitted.

    Results

    Pigmented odontogenic cysts (66.66%) are more common than pigmented tumors. The most common pigmented cyst was calcifying odontogenic cysts (22 cases), followed by odontogenic keratocysts (10 cases). The most common pigmented neoplasm was mixed odontogenic tumors (10 cases). Pigmented lesions are more 
    common in the Asian race.

    Conclusion

    The melanocyte presence in odontogenic lesions has no particular prognostic importance. Some possible factors in this field include ethnicity, dental hard tissue induction, neural crest cells, and dental lamina’s origin. Further documentation of such cases helps to improve the available information on these lesions.

    Keywords: Odontogenic Cysts, Odontogenic Tumors, Melanocytes Mouth