These results suggest that all of the commercially available mouthguard sheet materials had high shock-absorbing capabilities.

The aims of the present study were to investigate the shock absorption capability and force dispersion effect of mouthguard (MG) materials using load cell and film sensors. Two kinds of MG materials, ethylene vinyl acetate and polyolefin, were chosen for this study. When impact forces of approximately 5,000 N were applied on the MG materials using a round flat-nosed rod and a bluntly pointed rod, peak intensities were measured using the load cell sensor while peak stresses and impressed stress distribution areas were measured using the film sensor. Combined analysis using both load cell and film sensors clearly showed the shock absorption properties and force dispersion effects of different MG materials with different impact object shapes. Therefore, impact analysis involving a combined use of these sensor systems was useful and reliable in assessing the shock absorption capability and force dispersion effect of MG materials.

Background/Aim Sports mouthguards are effective devices that prevent dental trauma in sports activities. Players should change mouthguards on a regular basis because of thickness reduction and shape deformation. However, there is no guidance regarding the best timing to change mouthguards. The aims of this study were to analyze the thickness change and deformation of mouthguards after 2 years of use in Bangladesh field hockey players and to consider appropriate evaluation criteria. Material and Methods Fifty‐seven field hockey players belonging to the Bangladesh Sports Education Institute participated in this study. Participants were provided with double‐layered mouthguards made of polyolefin‐based material using a vacuum‐forming machine. Mouthguards were fabricated using 2‐mm‐thick sheet as the first layer and 3‐mm‐thick sheet as the second layer. Players used the mouthguards for 2 years. Before and after using the mouthguards, the thicknesses of nine areas were measured. In addition, the lengths of five areas were used to analyze shape deformation. Results After 2 years, the thicknesses of all measured areas had significantly reduced, and the lengths had significantly increased. Thickness reduction of the posterior‐occlusal and anterior‐incisal areas and deformation of the posterior‐buccal and posterior‐palatal areas were significantly larger than those in other measured areas. Conclusions Mouthguards should be changed on a regular basis to minimize thickness reduction and deformation. Occlusal and incisal thickness and length of the buccal‐posterior area and the palatal‐posterior area are factors to be considered in establishing guidelines regarding the timing of mouthguard change.

Background: Bangladesh is an endemic zone for re-emerging dengue viral infection since 2000. For the last few years, dengue viral outbreak occurs in the rainy season mostly in Dhaka city and seldom sporadic case finds beyond the Dhaka city of Bangladesh. But this outbreak expands also outside the Dhaka city of Bangladesh in 2019. Therefore, with scarcity of data regarding this field in the peripheral part of Bangladesh, we have designed this study among dengue infected patients in Jashore, Bangladesh. Objectives: This observational study aims to assess the clinical presentations, laboratory findings especially hematological changes and outcomes of patients with dengue viral infection at Jashore district in dengue outbreak-2019 in Bangladesh. Methodology: This was an observational study, carried out from 25thApril 2019 to 5thSeptember 2019 during dengue outbreak season in Jashore, Bangladesh. Patients were selected from outpatient department and indoor of a local private hospital in Jashore, Bangladesh who had given informed written consent to participate in our study. Result: Total eligible 77 patients were included in this study. Out of which 70 patients (90.9%) were dengue NS1 antigen Positive on Immunochromatography (ICT) and the rest were anti-dengue IgM antibody positive on ICT method. Around 74 (96.1%) patients had fever as the most common feature in dengue infection. Eighty-seven percentages (87%) of patients had history of headache. Other striking complaints were body ache (66.2%), back pain (51.9%), nausea (55.8%), vomiting (31.2%), anorexia (27.3%), arthralgia (29.9%) and retro-orbital pain (26.0%). Sore throat being a common feature in flu-like illness also found in 18.2% cases. Mean total count of whole blood count (WBC) falls on day 5 (5.76 X 109/L) and then gradually increased. Mean platelet count of study patient was normal throughout the course of the disease process. But, in some cases minimum platelets was found 21 X 109/L at the time of presentation and on day 5 and day 6 which was dropped down to 17 X 109/L. Mean Haematocrit (%) was more or less in a steady state throughout the acute phage of the disease. But, in some cases throughout the hospital stay minimum haematocrit was less than 30% and initially in some cases maximum haematocrit was more than 50% among some dengue infected patients. Total 67 (87%) subjects with dengue viral infection required hospital admission and mean hospital stay was 4 days with a standard deviation (SD) was ±2 days. Blood transfusion was required in only one patient. Around 95% patient was recovered and only 4 cases were referred to the higher centre further better management. Regarding complications, we had found diarrhoea in 9(11.7%) and bleeding disorder in 14.3% patients. Conclusion: In our study, the most common clinical presentations were fever, headache, body-ache, back pain, and gastrointestinal upset. The mean hematological started dropping down from 4th day and gradually improved after 7th day. Some patients developed diarrhea, bleeding disorders and hepatitis as complications during their disease process. We observed a good clinical outcome evident by without having severity and death toll among our study participants. There was very seldom requirement of blood and blood product transfusion in our study. J MEDICINE JAN 2021; 22 (1) : 33-40

The aim of this study is to consider the hypothesis that wearing mouthguards (MGs) from a young age helps to shape players’ habit of continuing to wear MGs as adults. In addition, we consider the mandatory rule of wearing mouthguards in the youth category on the future wearing rates of mouthguards. Eighty-five Japanese male amateur rugby players were included in this study. We examined the relationship between the wearing rates of mouthguards when participants were high school students and as adults (in 2018) using a questionnaire. Collected data were classified into categories (age, mouthguard type, and applied mandatory rule or not), and their relationships were analyzed. The wearing rate of mouthguards in high school was significantly related to the wearing rate of mouthguards in adulthood (χ2 = 12.1, p < 0.01). The mandatory rule to wear mouthguards at high school was related to the wearing rates of mouthguards as adults, but not significantly (χ2 = 3.42, p = 0.06). Participants’ mouthguard wearing rates as adults were affected by their high school wearing rates. The mandatory rule of wearing mouthguards in the youth category may be somewhat effective for improving mouthguard wearing rates; however, it is more important to provide knowledge about their importance.

For sports-active person with spaced dentition, it is important for reducing injury risks that the mouthguard covered the teeth and filled or embedded interproximal space certainly.

The purposes of this study were to examine the shock absorption capability of addition-cured silicone denture relining materials and the bonding strength of addition-cured silicone denture relining materials and a commercial mouthguard material to determine its applicability to mouthguard adjustment. Two addition-cured silicone denture relining materials and eleven commercial mouthguard materials were selected as test materials. The impact test was applied by a free-falling steel ball. On the other hand, bonding strength was determined by a delamination test. After prepared surface treatments using acrylic resin on MG sheet surface, 2 types of addition-cured silicone denture relining materials were glued to MG surface. The peak intensity, the time to peak intensity from the onset of the transmitted force and bonding strength were statistically analyzed using ANOVA and Tukey's honest significant difference post hoc test (p<0.05). These results suggest that the silicone denture relining materials could be clinically applicable as a mouthguard adjustment material.

Hydrotherapy is a procedure where water of different temperatures are used to relieve pain and treat illness. This review describes about different conditions of water treatments. Hydrotherapy can help treat a variety of conditions, including arthritis, stomach problems, sleep disorders, stress and depression. The theory behind hydrotherapy is that water has healing properties that can mitigate various ailments and conditions. Different states of water such as ice, liquid, and steam is used in the treatment of various conditions. Water cure therapies comprise enema therapy, gel therapy etc. and also includes colonic hydrotropic, sitz bath, hydro-massage, wraps and compress methods. Cryotherapy, cold water immersion or ice bath could be a new treatment method thatis used by physical therapists, sports medicine facilities and rehab clinics. Bangladesh J Medicine July 2021; 32(2) : 138-141