Occlusion Flashcards
from wilkins workbook
patient presents with prominent maxilla and a mandible posterior to normal relationship. this is known as a convex or ______ profile
retrognathic
patient has slightly protruded jaws, which give facial outline relatively flat appearance. this is known as a straight or _____ profile
mesognathic
patient has a prominent, protruded mandible and normal maxilla. this is known as concave, or ______ profile
prognathic
consists of all contacts during chewing, swallowing, or other normal action
functional occlusion
maximum intercuspation or contact of the teeth of the opposing arches; also called habitual occlusion
centric occlusion
any contact of opposing teeth that occurs before the desirable intercuspation
occlusal prematurity
seen when jaws are closed in centric relation
static occlusion
most unstrained, retruded physiologic relation of the mandible to the maxilla from which lateral movements can be made
centric relation
abnormal or deviated function
parafunctional
any deviation from the physiologically acceptable relationship of the maxillary arch and/or teeth to the mandibular arch and/or teeth
malocclusion
all teeth in the max arch are in maximum contact with all teeth in mand arch in a definite pattern; max teeth slightly overlap the mand teeth on facial surfaces
normal occlusion
rigid fixation of a tooth to the surrounding alveolus as a result to ossification of the periodontal ligament; prevents eruption and orthodontic movement
dental ankylosis
diastema, or gap, in the tooth row occasionally observed in the human primary dentition
primate space
tooth movement that occurs when disease is present
pathologic migration
infantile pattern of suckle-swallow movement in which tongue is place between incisors teeth or alveolar ridges
tongue thrust
space between 2 adjacent teeth in same arch
diastema
union or consolidation of two similar or dissimilar hard tissues previously adjacent but not attached
ankylosis
migration with a healthy periodontium
drifting
shiny, flat, worn spot on surface of a tooth, frequently on side of a cusp
facet
head holding instrument used to obtain cephalometric radiographs
cephalostat
orienting device for positioning the head for radiographic examination and measurement
cephalometer
specialty area of dentistry concerned with the diagnosis, supervision, guidance and treatment of the growing and mature dentofacial structures
orthodontic and dentofacial orthopedics
process of evaluating dental and skeletal relationships by way of measurements obtained directly from the head or from cephalometric radiographs and tracings made from the readiographs
cephalometric analysis
correction of abnormal form or relationship of bone structures
orthopedics
removable dental appliance usually made of plastic that covers a dental arch and is designed to minimize the damaging effects of bruxism and other oral habits
occlusal guard
primary canine relation is _____ the permanent dentition
same
when a pt has primate spaces in the _____ arch, you see these between the canine and first molar
mandibular
in the______ arch, you see primate spaces between lateral incisor and canine
maxillary
you can expect the second primary molar relation to appear s the _____ cusp of the max 2nd prim molar occluding with the ____ groove of the mand 2nd prim molar
mesiobuccal
buccal
there can be variations in distal surfaces relationships, called terminal steps. an example is when the _____ surface of mand prim molar is _______ to that of the max, thereby forming a mesial step
distal
mesial
although there can be morphologic variation in molar size, max and mand prim molars are approx same in _______ width
mesiodistal
when a pt. has a terminal step, the 1st perm molar erupts directly into _______ occlusion
proper
a terminal plane occurs when the ______ surfaces of the max and mand prim molars on same vertical plane
end
the max molar is _______ mesiodistally than the mand molar
narrower
when a pt has a terminal plane the first perm molars erupt _____ to _____
end
end
primate spaces affect the eruption of the ______
canines
functional occlusion consists of all contacts during chewing, swallowing, and other normal action. functional occlusion is associated with performance. list reasons why normal functional occlusion benefits patient
such forces necessary to maintain occlusal relationship to teeth and guide during eruption
made outside of normal range of function
parafunctional contact
when contact lost, teeth can drift into spaces created by unrelpaced missing teeth
proximal
results from occlusal habits and neuroses
parafunctional
normal contact that is made btwn max teeth and mand teeth during chewing and swallowing
functional
potentially injurious to periodntal supporting structures, but only in presence of bacterial plaque and inflammatory factors
parafunctional
attrition or wear of teeth occurs at this type of contact
proximal
creates wear faces and attrition on teeth
parafunctional
each contact is momentary, so total contact time is only few minutes each day
functional contact
tooth to tooth contact; bruxism, clenching, tapping
parafunctional
serves to stabilize position of teeth in dental arches and prevent food impaction btwn teeth
proximal
tooth to hard object contact, nail biting, occupational use (tacks or pins), use of smoking equipment (pipestem or hard cig holder)
parafuncitonal contact
tooth to oral tissues contact; lip or cheek biting
parafunctional
pathologic migration
proximal
