Relationship between ABO blood group and Rh factor with oral potentially malignant disorder

Introduction:

Oral cancer is the most life threatening of all oral diseases. It has a prolonged natural history with oral potentially malignant disorders (OPMD) as the precursor. Recognition and diagnosis of OPMD will help in early treatment, patient survival and in reducing morbidity related to treatment of oral cancer. OPMDs has multifactorial etiologies and is significantly associated with risk factors of the individual's lifestyle, particularly, chronic use of tobacco, spicy food, alcohol and smoking. Genetic factors also play an important role in the etiology of OPMDs. It is proven by many studies like Dermatoglyphics, Salivary miRNA, micronuclei in buccal mucosa etc., one of such kind is ABO blood group and Rh factor. OBJECTIVE: Aim of our study is to evaluate if any of the ABO blood group and Rh factor is associated with an increased risk for OPMDs.

Methodology:

A cross sectional study was conducted in Sri Rajiv Gandhi College of Dental Sciences included 55 patients with clinical and histopathologically proven OPMD's. Blood grouping was determined for all the patients using standardised agglutination method.

Result:

This study showed that people with blood group B+ are 1.46 times at a greater risk to develop OPMDs.

Conclusion:

Our study concludes that subjects with B+ blood group and habit of tobacco chewing and smoking are at higher risk to develop OPMDs than subjects with other blood groups.

Unicystic ameloblastoma of mural variant crossing the midline

Unicystic ameloblastoma (UCA) refers to cystic lesions that show gross features of a jaw cyst but on histologic examination show a typical ameloblastomatous epithelium lining part of the cyst cavity, with or without luminal and/or mural tumor growth. Even though the lesion is not as aggressive as the solid ameloblastoma, an accurate histopathologic diagnosis is essential for the treatment and prognosis. This case report illustrates a case of UCA of mural variant in the anterior region of the mandible crossing the midline, which is usually an unusual site of occurrence.

The correlation between micronuclei count and smoking behavior: A hospital-based study

Background: Micronucleus is a microscopically visible cyto-plasmic chromatin mass in the extranuclear vicinity, originating from aberrant mitosis, which consists of eccentric chromosomes that have failed to reach spindle poles during mitosis. The present study was designed to evaluate and compare cytogenetic changes in the buccal mucosa of smokers and non-smokers based on the occurrence of micronuclei. The study aimed to determine the correlation between the micronuclei count and the frequency and duration of smoking habit. Materials and Methods: Two groups (smokers and non-smokers) of 34 individuals each were examined. Cytological buccal smears were taken from participants using a moistened wooden spatula and stained with standard Papanicolaou stain. Presence of micronuclei was assessed at 40X magnification using a light microscope and a count per 500 cells was determined. The results of the study were analyzed statistically using Mann-Whitney U test, Spearman's rank correlation coefficient and Student t-test. Result: Smears from smokers showed a significant increase in the total number of micronuclei per 500 cell count compared to non-smokers. There was a strong positive correlation between the occurrence of micronuclei and the frequency and duration of smoking. A age-related increase in older age groups was also observed. Conclusion: The study reveals a strong positive correlation between the occurrence of micronuclei and the frequency and duration of smoking. This observation is vital in the utilization of the micronuclei detection in smears as a prognostic, educational and interventional tool in the management of patients with smoking habits.

Comparison and Clinical Evaluation of Two Pit and Fissure Sealants on Permanent Mandibular First Molars: An In Vivo Study

AIM

The aim of the study was to compare and evaluate the clinical efficacy of a microfilled pit and fissure sealant and a nanofilled pit and fissure sealant at 3, 6, and 12 months of interval.

MATERIALS AND METHODS

Samples consisting of 55 healthy 8- to 12-year-old children with deep pits and fissures in mandibular first permanent molars were selected for the study. It was a split mouth design and randomized clinical trial. A total of 110 mandibular first molars were divided into two groups of 55 each: group I Fissurit FX sealant and group II Grandioseal nanofilled fissure sealant. The sealed teeth were clinically evaluated at 3, 6, and 12 months of interval to assess marginal adaptation, sealant retention, fissure caries development, roughness of sealant surface, and change of color around the sealant.

RESULTS

The results showed that both Fissurit FX and Grandioseal pit and fissure sealants were effective in preventing dental caries. Marginal adaptation was significantly better with Fissurit FX when compared to Grandioseal pit and fissure sealant. There was no difference in sealant retention between the two groups. The surface roughness of Fissurit FX was high when compared to that of Grandioseal. Statistical analysis was done using the Chi-squared test for intra-group comparison and Fisher's exact test for inter-group comparison. Results were considered statistically significant if p ≤ 0.05.

CONCLUSION

Fissurit FX and Grandioseal pit and fissure sealants provided similar caries preventive effects and there was no difference in retention of sealants over a period of 1 year. However, surface roughness was better with Grandioseal fissure sealants.

CLINICAL SIGNIFICANCE

This study is significant because there is limited evidence about the efficacy of nanofilled pit and fissure sealants in vivo. It will also provide dental practitioners an insight into the clinical efficacy of nanofilled pits and fissure sealant when compared to micro-filled sealant enabling them to make the right choice for the betterment of their dental practice. How to cite this article: Smitha M, Paul ST, Nagaraj T, et al. Comparison and Clinical Evaluation of Two Pit and Fissure Sealants on Permanent Mandibular First Molars: An In Vivo Study. J Contemp Dent Pract 2019;20(10):1151-1158.

Linear Dimensional Changes of Five Interocclusal Recording Materials When Immersed in Two Disinfectants for Different Time Intervals

AIM

In this study, we intend to compare the linear dimensional changes of interocclusal recording media by immersing them in disinfectant solutions at different time intervals.

MATERIALS AND METHODS

Five interocclusal recording materials were used for this study and were grouped according to material types, namely wax, zinc oxide eugenol impression paste, polyether, polyvinyl siloxane, and bisacryl bite registration material. Each material was manipulated and injected into a stainless steel die. The materials were divided into 5 groups with 5 subgroups of 10 samples with a total of 250 samples. The samples were subjected to immersion in 2% glutaraldehyde and 0.5% sodium hypochlorite each for 30 and 60 minutes. Linear dimensional changes of the samples were tested by measuring the distance between points A and B at different time intervals by means of a stereomicroscope and compared with the control group.

RESULTS

Bisacryl showed the least linear dimensional change when immersed in both the solutions.

CONCLUSION

Bisacryl (Luxabite) presented no linear dimensional change at both time intervals as opposed to the other materials, hence, it is most accurate.

Estimation of serum hepcidin in oral submucous fibrosis before and after supplementation with oral iron: A randomized control clinical trial

Background:

Iron-deficiency anemia is synonymous with oral submucous fibrosis (OSMF). The cause for the same has not been ascertained yet. OSMF by way of anemia of chronic disease could be a probable cause of iron deficiency.

Aim and Objective:

This study was intended to evaluate the level of hemoglobin (Hb) in OSMF and to establish a relationship between serum hepcidin and Hb with OSMF, before and after oral supplementation of iron.

Materials and Methods:

The clinical trial was registered with the Clinical Trial Registry of India (CTRI/2016/03/006761). Eighty participants were selected. Based on the hematocrit values, they were divided into equal number of case (Group I) and control (Group II). Serum hepcidin was evaluated in these eighty participants with clinically established OSMF. Participants in the case group with low hematocrit values indicative of iron-deficiency anemia were supplemented with oral iron capsules twice daily for 3 months. After an interval of 3 months, serum hepcidin and hematocrit were evaluated.

Statistics:

Statistical analysis was done using SPSS software version 11.5 (IBM, New York, USA). One-way ANOVA test was done to assess the correlation between Hb% and serum hepcidin. Unpaired t-test was done to correlate Hb% and hepcidin before and after oral supplementation of iron. Clinical significance was established by calculating the effect size.

Results:

There was a significant correlation between the values of serum hepcidin and Hb (P < 0.001) before and after oral supplementation of elemental iron. After oral supplementation of iron, hematocrit improved in Group I along with reduction in serum hepcidin.

Conclusion:

It can be concluded that reduction of serum hepcidin is indicative of improvement in iron stores of body. Hence, serum hepcidin can be utilized as a diagnostic marker to assess iron stores in OSMF.

Verrucous carcinoma: A clinicopathological study

Objective

The purpose of this study is to identify a co-relation between clinical and histopathological features of verrucous carcinoma.

Materials and Methods

This study was conducted based on Knowledge Attitude and Practice (KAP) questionnaire comprising of 3 sets of questions covering clinical and histopathological aspects of the oral verrucous carcinoma. The target subjects were specialists in the field of Oral Medicine and Radiology, Oral and Maxillofacial Surgery and Oral Pathology.

Results and Conclusion

Verrucous carcinoma is a low grade variant of squamous cell carcinoma and the clinical features of both are very similar. The treatment of both differs widely; we fail to diagnose it correctly. This study correlates the clinic-pathologic features of oral verrucous carcinoma by means of statistically analyzing the varied clinical features and pathological impressions. This is helpful in eliminating the diagnostic dilemma and thus channelizing the data to present a clear treatment planning.

Transmigration of mandibular canines

The purpose of this paper is to present the first case of unusual reverse oblique (110 degrees to midsagittal plane) migration of mandibular right canine crossing the jaw midline and piercing the lower border of the mandible at the level of the opposite canine and also to report two more cases of transmigrated mandibular canine and one case of transmigrating mandibular canine. Mandibular canines are "cornerstone" of dental arch; their importance is manifested by their efficiency in masticatory function, stability of dental arch, and aid in maintaining natural facial expression. Early detection of this anomaly can help preserving these canines by orthodontic intervention or by surgical transplantation. This developmental anomaly is properly diagnosed by radiographic evaluation, which is primarily based on the panoramic radiograph. In patients with overretained deciduous canines or missing permanent canines, an intraoral radiograph should be supplemented with panoramic radiograph. This paper discusses the importance of early diagnosis of canine transmigration in treatment planning and reviews the various possible treatment options.

The antimicrobial activity of the three commercially available intense sweeteners against common periodontal pathogens: an in vitro study

AIM

To evaluate the in vitro antimicrobial activity of three commercially available intense sweeteners against two common periodontal pathogens Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans.

MATERIALS AND METHODS

Three commercially available intense sweeteners namely saccharin, aspartame and sucralose were obtained and powdered. Necessary concentrations of the sweeteners were prepared by mixing them with an inert solvent. The antimicrobial efficacy was assessed using agar well diffusion technique. Statistical analysis was done using one-way ANOVA followed by Tukey's post hoc test. p-value < 0.05 was considered statistically significant.

RESULTS

All the three sweeteners showed significant antimicrobial activity against the periodontal pathogens tested. Sucralose containing sucralose showed maximum zone of inhibition, against Aggregatibacter actinomycetemcomitans. Saccharin and aspartame containing saccharin and aspartame respectively, showed maximum zone of inhibition, against Porphyromonas gingivalis.

CONCLUSION

All the sweeteners used in this study have demonstrated significant antimicrobial activity. Therefore, these sweeteners could be recommended as an ideal alternative to sucrose.

CLINICAL SIGNIFICANCE

Dental caries and periodontal diseases are ubiquitous diseases of mankind caused by microorganisms. Dental caries is caused by sucrose. By altering the source like intense sweetener we can combat caries as well as with its antimicrobial properties against periodontopathic bacteria, we can reduce prevalence of periodontal diseases.

Ante mortem diagnosis of human rabies using saliva samples: comparison of real time and conventional RT-PCR techniques

BACKGROUND

Rabies is an enzootic and fatal disease and is still a major problem in developing countries. Ante mortem diagnosis in human cases is necessary for medical management of the patient and to ensure appropriate post-exposure treatment of contacts. Both conventional RT-PCR and Real time PCR (TaqMan) have been described for the detection of rabies virus RNA from saliva and tissue respectively, however to date, there have been no studies comparing conventional and real time PCR assays for detection of rabies virus nucleic acid using saliva samples for ante mortem diagnosis.

OBJECTIVES

In this study, we evaluated the utility of conventional RT-PCR and SYBR Green I Real time PCR in the ante mortem diagnosis of rabies using saliva samples.

STUDY DESIGN

Saliva samples collected from twenty-four patients presenting with typical clinical manifestations of rabies were tested in the two assays.

RESULTS

Amongst the 24 samples tested, 21 samples (87.5%) were positive by either of the two molecular methods. Of these 21, rabies virus RNA was detected in 6/21 in the conventional RT-PCR assay while SYBR Green I Real time PCR could detect RNA in 18/21 samples.

CONCLUSION

Real time PCR assay was more sensitive than conventional RT-PCR assay (sensitivity 75% versus 37%, p=0.0189). This study highlights the utility of molecular diagnostic tests in establishing ante mortem diagnosis of rabies using saliva samples within a few hours.