A 5-year-old residential school child walks into your clinic with the habit of thumb sucking in association with bruxism. Following effects are seen on maxilla except:
Correct Answer: Increased SN to ANS - PNS angle
Description: Effects of Thumb/digits sucking in maxilla
Proclination of maxillary incisors: When a child places a thumb/finger between the teeth, it is usually positioned at an angle, so that it presses against the lingual palatal surface of the upper incisors and the lingual surface of the lower incisors. This direct pressure causes displacement of incisors.
Increased arch length.
Increased anterior placement of apical base of maxilla.
Increase in SNA angle.
Increased clinical crown length of maxillary incisors.
Increased counter-clockwise rotation of occlusal plane.
Decreased width of palate. Left/right side of anterior maxillary arch is usually deformed with deformation related to whether the right or left thumb is sucked.
Atypical root resorption of primary central incisors.
Trauma to maxillary central incisors (Primarily due to their prominence).
Ref: Textbook of Orthodontics Gurkeerat Singh Second edition
Category:
Dental
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now