Dentosphere : World of Dentistry

 # 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

 # Fishman’s index is used in relation with: A. Population B. Hand-wrist radiographs C. Cephalograms  D. Periodontal diseases The correct answer is B. Hand-wrist radiographs. The following are the most commonly used methods for determination of skeletal maturity through hand-wrist xrays:  - Atlas method by Greulich and Pyle - Bjork Grave and Brown method - Singer's method of assessment - Fishman's skeletal maturity indicators - Hagg and Taranger method CLICK HERE FOR MORE MCQs

 # Carpal radiograph is used for assessment of: A. Bone condition B. Chronological age C. Treatment plan D. Skeletal maturation The correct answer is: D. Skeletal Maturation. There are different methods to assess the skeletal maturity of an indivudual which include: 1. Use of hand wrist radiographs 2. Evaluation of skeletal maturation using cervical vertebrae 3. Assessment of maturity by clinical and radiographic examination of different stages of tooth (Lower third molar) Hand wrist radiograph is the most reliable among all these.  CLICK HERE FOR MORE MCQs

 # A vestibuloplasty procedure is performed by: A. Reducing buccal bone from the alveolar ridge with a barrel bur and a handpiece B. Apically repositioning the muscular and mucosal attachments of the mandible C. Reflecting the gingiva and using Rongeurs to remove bone from the alveolar crest D. Using a bone file to smooth rough bony projections E. Grafting harvested iliac or rib bone onto the alveolar process The correct answer is B. Apically repositioning the muscular and mucosal attachments of the mandible Vestibuloplasty is a procedure performed to lengthen the residual ridge and deepen the oral vestibule. A vestibuloplasty can only be achieved by relocating or repositioning the muscle attachments and mucous membrane covering it into a deeper or more apical position.  Vestibuloplasties are also accompanied with the use of a mucosal graft or a skin graft.  CLICK HERE FOR MORE MCQs