Occlusion Flashcards
What are the muscles of mastication
temporalis
pterygoid muscle
Masseter.
The MB cusp of max 1st molar bisects buccal groove of mand 1st molar.
Angle’s Class 1 occlusion.
The MB cusp of max 1st molar is mesial to mand 1st molar’s buccal groove
Angle’s Class II Occlusion
Overbite
Angle’s Class II Occlusion
The MB cusp of Max. 1st molar is distal to buccal groove of mand 1st molar
Angle’s Class III
Underbite
Angle’s Class III
T/F For class I there is both normal and malocclusion.
True
_____ _______ occurs when the mandibular anterior teeth overlap the maxillary Anterior Teeth
Anterior Crossbite
_______ _______ occurs when the mandibular posterior teeth overlap the Maxillary Posterior Teeth
Posterior Crossbite
Extent of vertical (superior-inferior) overlap of the Maxillary Central Incisors over the Mandibular Central Incisors.
Overbite
This is measured relative to the incisal ridges/ edges.
Extent of horizontal (anterior-
posterior) overlap of the Maxillary Central Incisors over the Mandibular Central Incisors.
Overjet
Which class of Angle’s occlusion is Over jet categorized in?
Type II
Abnormal posterior positioning of themaxilla or mandible, relative to the facial skeleton and soft tissues.
◼More common in mandible. ◼Usually not seen straight on, but seen in profile. ◼Can make a patient look like they have a severe overbite.
Retrognathic
Marked protrusion of either the maxilla or mandible.
◼If not extremely severe can be treated in growing patients with orthodontic appliances.
◼In severe cases and adult patients, correct usually requires
surgical/orthodontic treatment
Prognathic
“move lower jaw R (or
L) while keeping your
teeth in light contact”
Lateral Excursions
“move mand straight
forward while keeping
teeth in light contact” see which teeth
guide
Protrusive
What are three evidences of Occlusal Trauma?
Wear Facets
Broken Restorations
Chipped Teeth
“rubbing, gritting,
or grinding together of the teeth, usually during sleep.”
Bruxism
What are two common causes of Bruxism?
Stress
Malocclusion
benign growth of new bone on top of existing bone.
Exostosis
Loss of cervical area due to bruxism
Abfraction
What are some evidences of Bruxism?
Exostosis
Recession
Periodontal Disease
Abfraction
Excessive Attrition
TMJ
Headaches
Sore muscles
Cheek Irritation (Linea Alba
Scalloped Tongue
loss of normal tooth structure as a result of functional or parafunctional tooth to tooth contact.
Attrition
A form of non-carious tooth loss occurring
along the gingival margin. It is a mechanical loss of tooth structure. Usually from flexural forces or over zealous tooth brushing.
Abfraction
originating from friction or mechanical forces-foreign object.
Abrasion
Wearing away of the tooth surface by
an acid.
Erosion
erosion on the lingual surface of the tooth is evidence of _____.
Bulimia
Oral Signs of ______ include:
“raised”
amalgams
thermal
sensitivity
Thinning or Chipping of incisal edges
Anterior Open Bite
Loss of Vertical Dimension
Bulimia
