Dentosphere : World of Dentistry

 # Surfactant is secreted by: A. Pneumocyte I B. Pneumocyte II C. Goblet cells D. Pulmonary vessels The correct answer is B. Pneumocyte II. Surfactant lowers the surface tension of the fluid lining of the alveoli and prevents the collapsing tendency of the lungs. It is a phospholipid. The absence of surfactant results in Hyaline membrane disease (or) respiratory distress syndrome. 

 # Scleroderma is associated with: A. Parry Romberg Syndrome B. Pierre Robin Syndrome C. Gardner Syndrome D. Peutz Jegher Syndrome The correct answer is A. Parry Romberg Syndrome. Hemifacial atrophy or Parry Romberg syndrome consists of slow progressive atrophy of soft tissues of essentially half the face, characterized by progressive wasting of subcutaneous fat, accompanied by atrophy of skin, cartilage, bone, and muscle. This syndrome is accompanied usually by contralateral Jacksonian epilepsy, trigeminal neuralgia, and changes in hair and eyes. It is also reported that hemifacial atrophy is a form of localized scleroderma which is supported by its concurrence with scleroderma. 

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 Intraoral photography involves capturing a series of detailed images of the inside of a patient's mouth to document their oral health, aid in diagnosis, and monitor treatment progress. To provide a comprehensive view of the patient's oral structures, several different views or types of intraoral photographs are commonly taken. These views offer orthodontists and other dental professionals a well-rounded understanding of the patient's dental condition. Here are some of the most common views included in intraoral photography:  Frontal View (Full-Arch View): This view captures the entire arch of teeth from the front, providing a comprehensive overview of tooth alignment, spacing, and symmetry. It helps orthodontists assess the overall aesthetics of the smile and identify any irregularities.  Right Lateral View: The right lateral view is taken from the side to evaluate the profile of the teeth and jaws from the right angle. This view is essential for diagnosing issues like...

 Orthodontics, the field of dentistry dedicated to correcting misaligned teeth and jaws, has evolved significantly over the years. With the advent of cutting-edge technologies, orthodontists now have a vast array of tools at their disposal to provide more accurate diagnoses, personalized treatment plans, and improved patient experiences. Among these tools, intraoral photography stands out as a valuable technique that has revolutionized the way orthodontic professionals document, analyze, and communicate treatment progress. The Power of Intraoral Photography Intraoral photography involves capturing high-quality images of the inside of a patient's mouth, allowing orthodontists to closely examine teeth, gums, and oral structures in intricate detail. This technique offers a multitude of advantages that contribute to more effective orthodontic treatments and enhanced patient satisfaction. 1. Precise Documentation: Gone are the days of relying solely on hand-drawn diagrams or vague writt...

 Maintaining optimal oral hygiene is vital for overall health and well-being. One crucial aspect of oral care is dental scaling, a professional procedure aimed at removing stubborn plaque and tartar buildup from your teeth and gums. While it's always best to consult a dentist for a proper assessment, there are several indicators you can consider to gauge whether your teeth might need scaling. Here's a guide to help you assess the need for dental scaling at home: Understanding Dental Scaling:  Dental scaling, also known as deep cleaning, is a preventive dental procedure designed to remove accumulated plaque and tartar that regular brushing and flossing can't eliminate. Plaque is a sticky film of bacteria that adheres to your teeth and, if not removed, can lead to tooth decay, gum disease, and other oral health issues. Over time, plaque can harden into tartar, which cannot be removed through regular brushing and requires professional intervention. Signs That Your Teeth Might ...

 # For best result in class III malocclusion correction the orthopedic appliance should be worn at least: A. 12-16 hours per day B. 8-10 hours per day C. 5-8 hours per day D. Throughout night The correct answer is A. 12-16 hours per day. Chin cup and  face mask are the orthopedic appliances that can be given to correct skeletal class III malocclusion. At least 12 to 14 hours of wear per day produces desired results.

 # An ANB angle of 2 degrees on the cephalogram usually indicates: A. An unfavorable relationship of mandible to maxilla B. A favorable relationship of maxillary alveolar base to mandibular alveolar base C. Poor cranial growth with poor prognosis D. Retruded maxillary incisor The correct answer is B. A favorable relationship of maxillary alveolar base to mandibular alveolar base. SNA angle relates the maxilla to the cranial base. The mean value is 82°. A larger value indicates a prognathic maxilla while a smaller value suggests a retrognathic maxilla. SNB angle relates the mandible to the cranial base. Its average value is 80°. Larger values indicate a prognathic mandible while smaller values indicate a retrusive mandible. ANB angle denotes the relative position of the maxilla and mandible to each other. The mean value is 2°. An increase in this angle indicates class-II skeletal tendency while an angle that is less than normal or a negative angle suggests a skeletal class-III ...

 # Which condition is associated with mulberry molars in children? A. Autism B. Down’s syndrome C. Syphilis D. Diabetes mellitus The correct answer is C. Syphilis. Mulberry molars are a dental condition typically linked with congenital syphilis, characterized by multiple rounded rudimentary enamel cusps on the permanent first molars. Mulberry molars are actually defective permanent molars. 

 # In a hand wrist radiograph, which of the following carpal bones appears first? A. Hamate B. Triquetral C. Lunate D. Naviculare The correct answer is A. Hamate.  Sequence of Appearance of 8 Carpal bones: Capitate < Hamate < Triquetral < Lunate < Trapezium, Trapezoid, Scaphoid (Three of them appear together) < Pisiform 

 # Difference of width of four maxillary permanent incisors and primary incisors is about: A. 7 mm B. 6 mm C. 6.5 mm D. 8.5 mm The correct answer is A. 7 mm.  Permanent incisors develop lingual to the primary incisors. For incisors to erupt in normal alignment, there is an obligate space requirement in the anterior part of both the arches which is termed as incisor liability or difference between the amount of space needed for the permanent incisors and the amount available for them is called the incisor liability. The total sum of the mesiodistal width of four permanent incisors is larger than that of primary incisors by 7.6 mm in maxilla and 6 mm in mandible.