RESUMEN
AIM: This study aims to compare fracture resistance of mandibular first molars reinforced with diagonally placed horizontal posts after endodontic therapy. MATERIALS AND METHODS: Thirty-two mandibular first molar teeth were selected, standardized, divided into four groups (GP) - GP I (endodontically treated-no post)), GP II (horizontal post-buccolingual), GP III (horizontal postdiagonal), and GP IV (natural teeth). The individual teeth were mounted on bases, coded, and suitably prepared for the facture testing procedure. RESULTS: Buccolingual type of fracture was the most common among the experimental groups with a percentage of incidence of 37.50%. The cuspal type of fracture was the next most common with a percentage of incidence of 25.0%. The incidence of mesiodistal, comminuted, and proximal type of fractures was also observed and had a percentage of incidence of 9.38%, 9.38%, and 9.38%, respectively. Group IV had the highest fracture resistance with a mean value of 1279.82 (N). Group I, Group II, and Group III had mean values of 684.16(N), 756.84(N), and 758.17(N), respectively. There was a statistically significant difference between Gp IV and Gp (I-III) in load values of root fracture (P < 0.05). CONCLUSION: Within the limitations of this study, it can be concluded that diagonally placed horizontal postdesign has a higher resistance to facture when compared to buccolingually place horizontal postdesign and root canal treated non postgroup. These designs have the potential to be a conservative postendodontic management option. Further evaluation of different horizontal postdesigns and assessment in a clinical setting is recommended.
RESUMEN
Mucormycosis is a very aggressive, devastating opportunistic fungal infection commonly involving nasal, maxillary,orbital, and cerebral regions. In the second wave of the coronavirus disease 2019 (COVID-19) pandemic, a high frequency of mucormycosis infections has been seen because of the triad of COVID-19, systemic steroids, and preexisting diabetes mellitus. A patient might present with a simple mobile tooth/teeth with multiple gingival abscesses Necrotic bone could be seen in the palate. Blackish discoloration might be present in the oral mucosa. There might be extraoral swelling . If rhino-oculo cerebral mucormycosis is diagnosed, then there are two immediate treatment modalities to be followed. Both surgical and medical treatment are necessary. Surgical is thorough debridement of the necrotic tissue. To prevent the occurrence of mucormycosis, meticulous glycemic control and rational use of steroids and antibiotics for the shortest possible time with adequate attention toward the ventilators and tubing are necessary.
RESUMEN
AIM: The aim of this study was to evaluate the distribution of sealer at different levels of the root canal using three different sealers in a single-cone obturation technique. MATERIALS AND METHODS: Thirty freshly extracted mandibular premolar teeth were selected and access opening was performed. Working length was determined. Cleaning and shaping were done till 25 size K file followed by ProTaper till F2 size. Teeth were then obturated with matching gutta-percha points with the following sealers: Group I, 10 teeth with zinc oxide eugenol sealer; Group II, 10 teeth with AH plus sealer; and Group III, 10 teeth with NanoSeal-S sealer. Teeth were cross sectioned at 3 and 6 mm from the apex. Color photographs of sections were taken at a magnification of ×40 using a camera connected to a stereo-operating microscope and the images were transferred to a computer. Sealer distribution was observed and the canal perimeters coated or uncoated with the sealer can be calculated using a computer digital imaging system. RESULTS: Of the three groups, zinc oxide eugenol showed least sealer distribution. AH Plus and Nanoseal-S showed no significant difference between the distribution at the 3- and 6-mm levels. CONCLUSION: Both AH Plus and Nanoseal-S showed excellent sealer distribution when compared to zinc oxide eugenol.