ABSTRACT
Context: Fracture of endodontically treated teeth is a grave sequela that a clinician should seriously ponder. Suitable selection of restorative materials is a requisite for long?term clinical success. Aims: To compare the fracture resistance of endodontically treated teeth restored with three different posts luted using two different cements under all ceramic crowns. Settings and Design: This in vitro study was conducted in the Department of Prosthodontics, Government Dental College, Kottayam, Kerala, India. Methods and Material: Thirty endodontically treated single?rooted mandibular premolars in which post spaces were prepared and divided into three different groups. Group 1 (n = 10): zirconia post group. Group 2 (n = 10): quartz fibre post group. Group 3 (n = 10): glass fibre post group. Each group is sub?divided into two based on the luting system: resin?modified glass ionomer cement (RMGIC) or dual?cure resin cement (DCRC). The fracture resistance testing was performed in a universal testing machine with a crosshead speed of 0.5 mm/min. Statistical Analysis Used: The mean fracture resistance were analysed using independent sample Student t?test and one?way ANOVA. Results: Within the zirconia post group, the mean fracture resistance was higher in DCRC sub?group compared to the RMGIC sub?group and the difference was statistically significant (p = 0.017). The difference in fracture resistance between three different post systems was not found to be statistically significant with respect to both the luting systems. Conclusions: It was observed that when zirconia post is used, the mean fracture resistance was higher in dual?cure resin group compared to the resin?modified GIC group.
ABSTRACT
Alternanthera Forsskal (Amaranthaceae) is an underexploited genus with potent medicinal activities exhibiting biotic and abiotic tolerance, survival with basic minimal requirements, with a palatable taste and free of insecticides or pesticides. Here, we analyzed selected species of these under-utilized plants for various nutrients to enable identification of unconventional food resources. Among the species investigated, Alternanthera sessilis showed high amount of energy rich nutritional factors, such as carbohydrates, proteins and lipids. High content of aminoacids and flavanoids have been observed in A. sessilis and A. philoxeroides. Alternanthera versicolor recorded higher amount of vitamin A while A. tenella showed the least. Vitamin C content was predominantly high in all the species investigated. Regarding pigment composition, highest chlorophyll content was noticed in A. philoxeroides followed by A. sessilis; the least amount in A. tenella. The concentration of carotene was high in A. sessilis. With regard to antinutritional assays, A. sessilis and A. philoxeroides exhibited only low level of phytic acid and majority of them had low tannic acid content. These two species possess high nutritional and low level of antinutritional factors. All the species studied revealed comparatively high amount of phenol. With their demonstrated nutritional qualities with low level of anti-nutritional factors, it can be suggested that A. sessilis and A. philoxeroides be included in the dietary menu along with other conventional leafy vegetables. Further, these nutritive herbs can be advocated for domestication and thereby effective utilization.
ABSTRACT
Orthognathic surgery involves the surgical manipulation of the facial skeleton to correct anatomical and functional deformities. Model surgery is an integral part of orthognathic surgery. It gives the three-dimensional understanding of the post-operative relationship of the jaws. Orthognathic model surgery has been used to assist the surgeon in repositioning the upper and lower jaws into a predicted position. Model surgery planning has generally been carried out using one of two techniques - The lock wood key spacer technique or Eastman Dental Hospital anatomically orientated model surgery technique. This work presents our experiences in model surgery using modified Eastman’s technique.