#2 Epidemiology and Etiology Flashcards
What is malocclusion? Is it a disease?
It is not a disease. Malocclusion represents a spectrum of biological variability or diversity. When the deviation from normal reaches a certain degree of severity it is termed malocclusion
What percentage of people has normal occlusion?
35%
What are the trends of irregularity in occlusion as age increases?
Irregularity increases between childhood and youth, and stays pretty stable from youth to adulthood, except for mandibular crowding, which increases
Class I occlusion is defined as what?
Mesiobuccal cusp of the maxillary 1st molar fits with the buccal groove of the mandibular 1st molar.
Also, your mandibular canine fits in the space between your maxillary lateral and maxillary canine
Why would mild class II decrease from childhood to adolescence? Why would mild class III increase from childhood to adolescence?
Class II would decrease due to mandibular jaw growth during the adolescent growth spurt.
Class III would increase for the same reason.
T/F, the anterior open bit is more commonly found in african americans than caucasians?
True
T/F malocclusion is in most instances a developmental condition and not pathological, and results from a complex interaction among multiple factors
Truth
What are some factors that can cause malocclusion?
Hereditary factors
Interference with normal development
Trauma
Disturbance of normal function
T/F with increasing age, heritability estimates increase for skeletal variables and decreases for dental variables?
True
What are some prenatal developmental occurrences that affect development of the dental structures.
Cleft lip/palate, fetal alcohol syndrome and hemifacial microsomia
What are some things that can affect development post-natally?
childhood fractures,
muscle dysfunction
acromegaly
condylar hyperplasia
What are some functional influences that influence growth?
Thumb sucking habits
Tongue thrusting habits
Respiratory pattern
T/F Etiology of most malocclusions are unknown.
True
