Dentosphere : World of Dentistry

# In Angle's classification for malocclusion, the key tooth is: A. Mesiobuccal cusp of permanent maxillary forst molar B. Distobuccal cusp of permanent maxillary first molar C. Mesiobuccal cusp of permanent maxillary second molar D. Mesiobuccal cusp of permanent mandibular first molar # Andrew's 5th Key of occlusion is: A. Curve of Spee B. Rotation absent C. Tight contact D. Bolton's ratio # Zygoma or Key ridge corresponds to: A. Mesiobuccal root of upper first molar B. Mesiobuccal root of upper second molar C. Distobuccal cusp of upper first molar D. Distobuccal cusp of second molar    # Angles line of occlusion are seen in which plane? A. Sagittal B. Vertical C. Transverse D. Transverse and vertical # When Angle's classification system is used then displacement occurs in which direction? A. Vertical B. Transverse C. Sagittal D. Sagittal an...

# Who among the following is named as the pioneer in the treatment of cleft palate and related problems? A. Norman Kingsley B. Edward H. Angle C. Graber D. Nance The correct answer is A. Norman Kingsley. Kingsley, was among the first to use extraoral force to correct protruding teeth. He was also a pioneer in the treatment of cleft palate and related problems.  CLICK HERE FOR MORE MCQs

 # Who among the following developed the first orthodontic appliance? A. Pierre Fauchard B. Norman Kingsley C. Emerson C. Angell D. Edward H. Angle The correct answer is A. Pierre Fauchard. Orthodontics truly began developing in the 18th and 19th centuries. In 1728, French dentist Pierre Fauchard, who is often credited with inventing modern orthodontics, published a book entitled "The Surgeon Dentist" on methods of straightening teeth. Fauchard, in his practice, used a device called a "Bandeau", a horseshoe-shaped piece of iron that helped expand the palate. In 1754, another French dentist, Louis Bourdet, dentist to the King of France, followed Fauchard's book with The Dentist's Art, which also dedicated a chapter to tooth alignment and application. He perfected the "Bandeau" and was the first dentist on record to recommend extraction of the premolar teeth to alleviate crowding and to improve jaw growth. Pierre Fauchard, 'Father of modern denti...

 # Which of the following is a component of Jackson’s triad? A. Functional efficiency B. Structural balance C. Aesthetic harmony D. All of the above The correct answer is D. All of the above. The aims and objectives of orthodontic treatment have been summarized by Jackson as the 'Jackson's triad'. The three main objectives of orthodontic treatment are: - Functional efficiency - Structural balance - Aesthetic harmony CLICK HERE FOR MORE MCQs

 # The term ‘Orthodontics’ was coined by: A. Le Foulon B. Hunter C. Carabelli D. Norman Kingsley The correct answer is A. Le Foulon. The term orthodontics was apparently used first by the Frenchman Le Foulon in 1839. CLICK HERE FOR MORE MCQs

 # The occipital condyle is represented by the following cephalometric point: A. Bolton’s point B. Broadbent registration point C. Basion D. Articulare The correct answer is A. Bolton's point. Bolton's point: The highest point at the post-condylar notch of occipital bone Few other cephalometric landmarks are: 1. Glabella: It is the most prominent point on the forehead in the mid-sagittal plane. 2. Nasion: The most anterior point midway between the frontal and nasal bone on the frontonasal suture. 3. Orbitale: The lowest point on the inferior bony margin of the orbit. 4. Porion: The highest bony point on the upper margin of external auditory meatus. 5. Sella: This point represents the mid point of the pituitary fossa or sella-turcica. 6. Basion: It is median point of the anterior margin of the foramen magnum 7. Anterior nasal spine: It is the anterior tip of the sharp bony process of the maxilla in the midline of the lower margin of anterior nasal spine. 8. Point A: It is a deep...

 # Which of the following bone indicates the termination of skeletal maturity? A. Presence of Sesamoid B. Appearance of pisiformis C. Appearance of calcification of hook of hamate D. Union of diaphysis and epiphysis on radius The correct answer is D. Union of diaphysis and epiphysis on radius. Some other important tips:  * Absence of hamate and pisiform - Still 1 year for prepubertal growth spurt * Presence of hamular process of the hamate, pisiform and sesamoid- Beginning of  growth spurt * Initial ossification of  sesamoid - Peak pubertal growth spurt * The epiphysis and diaphysis fusion/ ossification of sesamoid completed - Prepubertal growth spurt completed * The epiphysis and diaphysis fusion on radius and ulna- Active growth completed CLICK HERE FOR MORE MCQs