Dentosphere : World of Dentistry

 # Which among the following is not a feature of Mediterranean anemia? A. Rodent like facies B. Fessa bodies C. Rib within rib appearance D. Platybasia The correct answer is D. Platybasia. Mediterranean anemia, also known as thalassemia, is a group of inherited blood disorders characterized by reduced or absent production of normal hemoglobin. This leads to various clinical manifestations, including skeletal changes due to bone marrow expansion. However, platybasia (flattening of the skull base) is not typically associated with thalassemia. Rodent-like facies: This is a characteristic of sickle cell anemia, not thalassemia. It refers to the overgrowth of the maxillary bones and protrusion of the upper incisors. Fessas bodies:  In heterozygotes, the disease is mild and is called thalassemia minor or thalassemia trait. It represents both α-and β-thalassemia. Homozygotes may exhibit a severe form of the disease that is called thalassemia major or homozygous -thalassemia, in which...

# All are features of Keratocystic odontogenic tumor EXCEPT: A. Most common location is the posterior body of the mandible B. Shows evidence of a cortical border, when not secondarily infected C. Internal structure is most commonly radiopaque D. Curved internal septa may be present The correct answer is C. Internal structure is most commonly radioopaque. Keratocystic odontogenic tumors (KCOTs) are benign but locally aggressive lesions. Their radiographic appearance is typically: Radiolucent: KCOTs appear as dark areas on radiographs, indicating that they are less dense than the surrounding bone. Well-defined borders: They usually have clear and distinct margins. Unilocular or multilocular: They can be single-chambered (unilocular) or multi-chambered (multilocular). Scalloped borders: The edges of the lesion may have a wavy or scalloped appearance. Curved septa: If multilocular, the internal septa may appear curved. Reference: Odontogenic keratocyst | Radiology Reference Article | Radi...

 # Soldering and welding is not possible in: Stainless steel wire Elgiloy Nitinol TMA The correct answer is C. Nitinol. Limitations of NiTi wires NiTi wires have very low formability in the clinical setting. These wires cannot be welded or soldered due to the passivating nature of titanium dioxide which is strongly adhered to the metal surface. The frictional forces in the nitinol wire are very high due to high Ti content, and therefore these wires are unsuitable for sliding tooth movements such as retraction on the wire. NiTi wires have highest nickel content among the appliances used in orthodontics which is 55%. Although they are greatly biocompatible, however, high nickel content could be disadvantageous by causing hypersensitive reactions. Reference: Orthodontics: Diagnosis and management of malocclusion and dentofacial deformities, OP Kharbanda, 2020

 Dabur Lal Dant Manjan is not fluoridated. It is an Ayurvedic toothpaste made with traditional herbs and ingredients. While it's popular in many countries, including India, its legal sale in the USA might be limited due to the lack of fluoride, which is a standard ingredient in toothpaste for cavity prevention. Here's why it's still sold legally in many countries: Cultural Preference: Ayurvedic practices are deeply ingrained in many cultures, and people trust and prefer traditional remedies like Dabur Lal Dant Manjan. Alternative Ingredients: While not containing fluoride, Dabur Lal Dant Manjan includes ingredients like clove and other herbs that are believed to have antibacterial and oral health benefits. Focus on Gum Health: Some users believe that the toothpaste is effective in maintaining gum health and preventing gum diseases. Lack of Awareness: In some regions, there might be a lack of awareness about the importance of fluoride in preventing tooth decay. Important No...

# The contour of the incisal edges of the maxillary anterior teeth relative to the curvature of the lower lip during a social smile is called: Line of occlusion b. Curve of Spee c. Curve of Monson d. Smile arc The correct answer is D. Smile arc. The smile arc is defined as the contour of the incisal edges of the maxillary anterior teeth relative to the curvature of the lower lip during a social smile. For best appearance, the contour of the incisal edges of these teeth should parallel the curvature of the lower lip. If the lip and dental contours match, they are said to be consonant. A flattened (non-consonant) smile arc can pose either or both of two problems: It is less attractive, and it tends to make you look older (because older individuals often have wear of the incisors that tends to flatten the arc of the teeth). The characteristics of the smile arc must be monitored during orthodontic treatment because it is surprisingly easy to flatten it in the pursuit of other treatment obj...

# Concept of cortical anchorage given by: a. Angle  b. Kingsley  c. Ricketts  d. Newton  The correct answer is C. Ricketts.  Rickets technique by intentionally bringing the buccal roots of the anchor teeth into contact with the cortical plates of bone thus increasing the anchorage value of such teeth. It should be appreciated that this process should be carried out with great care and precision since overzealous torque can produce root resorption or in extreme cases cortical perforation. (Brezniak& Wasserstein, 2008)

  # One of the following procedures falls under high bacteremia risk for infective endocarditis:  a. Post-operative suture removal  b. Intraligamentary and intra-osseous local anesthetics injections  c. Intracanal endodontic treatment  d. Placement/ removal of removable orthodontic appliances  The correct answer is B. Intraligamentary and intra-osseous local anesthetics injections. All dental procedures that involve manipulation of gingival tissue or the periapical region of teeth or perforation of the oral mucosa are the procedures for which endocarditis prophylaxis is reasonable. The following procedures and events do not need prophylaxis:  routine anesthetic injections through noninfected tissue,   taking dental radiographs,  placement of removable prosthodontic or orthodontic appliances,  adjustment of orthodontic appliances,  placement of orthodontic brackets,  shedding of deciduous teeth,  and bleeding from trau...