Dentosphere : World of Dentistry

 # Which factor requires careful consideration, when taking measurements from an image?  A. Definition  B. Magnification  C. Reconstruction  D. Superimposition The correct answer is B. Magnification. The magnification factor of any image must be carefully considered when taking measurements. Image definition is significant to the overall diagnosis; however, the magnification factor is of special concern when calculating bone dimensions.  Image reconstruction is largely a function of multiplanar reformatting (MPR).  Superimposition is a factor for some images (panoramic radiographs and conventional tomograms); however, the magnification factor must be carefully considered when calculating bone dimensions. 

 # The common organism implicated in dry socket is: A. Streptococcus B. Staphylococcus C. Treponema denticola D. Pneumococcus The correct answer is C. Treponema denticola. A number of bacteria are known to possess fibrinolytic activity. It has been recently postulated that Treponema denticola may have an etiological role in the genesis of dry socket.

 # Irregular opaque areas are found on radiographs of lower anterior teeth, the teeth are vital. The cause may be:  A. Subgingival calculus  B. Cementoma C. Condensing osteitis  D Chronic apical periodontitis  The correct answer is A. Subgingival calculus. Calculus may be seen as small angular radiopaque deposits projecting between interproximal surfaces of the teeth or as radiopaque bands across the roots representing circumferential accumulation as illustrated in the figure. Ref: White, S.C. and Pharoah, M.J., 2014. Oral radiology-E-Book: Principles and interpretation. Elsevier Health Sciences.

 # Head diameter of a 245 bur is: A. 0.1 mm B. 0.5 mm C. 0.8 mm D. 0.9 mm The correct answer is C. 0.8 mm. No. 245 bur has a head length of 3 mm and head diameter of 0.8 mm. This is an inverted cone carbide bur used for amalgam cavity preparations.  Benefits of the bur:  • For amalgam cavity preparations, the initial punch cut should have a depth of 1.5 mm, so it is half of this bur length, so it is very convenient to use the bur.  • In class II the proximal ditch cut is established easily with the 0.8 mm diameter bur end cuts 0.5 mm into dentin and 0.3 mm into enamel. 

 # During countercurrent mechanisms, which of the following area of nephron does filtrate become hypertonic to plasma? A. Bowman’s capsule B. Proximal convoluted tubule C. Loop of Henle D. Distal convoluted tubule The correct answer is C. Loop of Henle. A circuit of fluid in the loop of Henle—an important part of the kidneys—allows for gradual buildup of the concentration of urine in the kidneys, by using active transport on the exiting nephrons (tubules carrying liquid in the process of gradually concentrating the urea). The active transport pumps need only to overcome a constant and low gradient of concentration, because of the countercurrent multiplier mechanism.

 Sectional NiTi wires can also be used to align a malpositioned tooth in a piggyback manner where rest of the arch is ligated with a stiff wire. With this arrangement, a light continuous force is exerted to bring the displaced tooth into the alignment while reciprocal force is distributed over the anchor teeth.  Case done by: Dr. Sushant Pandey, CODS BPKIHS Piggyback wires offer the potential to combine wires of similar or, more commonly, markedly different physical properties. In relation to space redistribution and alignment, piggybacks typically involve use of flexible round NiTi wires in combination with more rigid base arch wires permitting alignment of displaced teeth limiting the effect of reactive forces in terms of horizontal and vertical anchorage.  Reference:  1. Kharbanda, Om. (2013). Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities 2nd ed..  2. Fleming, P., Seehra, J., 2019. Fixed Orthodontic Appliances. BDJ Cl...

 The atmosphere within a dental clinic plays a pivotal role in shaping patients' perceptions and experiences. Dental professionals recognize the importance of creating a welcoming and comfortable environment that goes beyond the clinical aspect of oral care. The interior design of a dental clinic is an art and science that seamlessly combines aesthetics, functionality, and the unique needs of the dental practice. Let's delve into the key considerations that make dental clinic interior designing an essential aspect of the overall patient experience. 1. Balancing Functionality and Aesthetics: Dental clinics require a careful balance between functionality and aesthetics. The layout should be designed to optimize workflow for dental practitioners while providing a warm and inviting atmosphere for patients. Well-designed reception areas, consultation rooms, and treatment spaces contribute to a positive overall experience. 2. Patient Comfort and Relaxation: Dental anxiety is a common...