Occlusion and Malocclusion Flashcards
What are genetic causes of malocclusion?
adverse skeletal patterns
abnormal size of jaws and teeth
cleft lip and palate
What does a class 1 skeletal pattern describe?
normal skeletal pattern
what does a class 11 skeletal pattern describe?
maxilla protrudes mandible more than the norm
What does a class 111 skeletal pattern describe?
mandible protrudes the maxilla
what other considerations could be taken into account re. skeletal pattern?
deviation from the norm in transverse skeletal pattern
what can deviations in size of teeth and jaws cause re. malocclusion
large teeth in small jaws can cause crowding
small teeth in large jaws can cause spacing
what could be environmental causes of malocclusion?
non functioning soft tissues
habits
trauma
what could be an example of issues with soft tissues causing malocclusion?
incompetent lips
large tongue
what could be an example of habitual issues causing malocclusion?
thumb sucking
what could be an example of trauma causing malocclusion?
intrusion of individual teeth
replanted teeth can become ankylosed.
what local factors can cause malocclusion?
additional teeth/supernumerary
missing teeth/ hypodontia
retained deciduous teeth
premature loss of deciduous teeth
what problems can supernumeraries cause?
commonly upper central incisors
can prevent permanent teeth from erupting
what problems can hypodontia cause?
commonly missing lateral incisors
space may not allow for bridge- may requiring closing the gap instead
what problems can retained deciduous teeth cause?
may prevent permanent erupting in correct place or at all.
permanent may be missing
what problems can premature loss of deciduous teeth cause?
loss of space for eruption of permanent teeth
crowding
