lecture №1. facial and jaw signs: facial signs - symmetrical - proportionality jaw signs -...

Lecture №1

*Physiological and Patological Types of Occlusion

*Physiological Types of Occlusion

Facial and jaw signs: Facial signs - symmetrical

- proportionality Jaw signs - correct harmonious

signs: occlusion

extraoral

Intraoral


Facial signs - symmetrical

right side = left side


Facial signs - proportionality

The upper and lower anterior face heights should be approximately equial


1) orthognatic bite

2) straight bite

3) physiological biprognathism

4) opisthognathic bite


Characteristics of the orthognathic bite

2/31/3

1) the upper frontal teeth

cover the lower ones by 1/3 length

of the lower teeth crowns



2) the tubercle of the

upper canine tooth crown is

located between the lower

canine tooth and the 1-st

premolar



3) the centerline between the central incisors of the upper and lower jaws is coinsides



4) the mesial-buccal tubercle of the upper 1-st molar is located in the transverse sulcus of the similar lower tooth



5) every tooth of the upper jaw has two antagonists – similar and standing behind (except for the lower central incisors and upper wisdom teeth)



6) the buccal tubercles of the upper lateral teeth cover the buccal tubercles of the lower ones, and the palatine tubercles of the upper teeth are located between the buccal and lingual tubercles of the lower teeth



7) the upper dental arch is semielliptical, the lower – parabolic; in temporary occlusion – a semicircle on both jaws



8) the dental arches of the upper and lower jaws are symmetrical



9) in the state of central occlusion there is a full occlusive contact between all teeth (except for unerupted ones)



10) in the state of physiological rest an interocclusive space varying within 2 mm arises between dental arches


Characteristics of the straight bite


Characteristics of the physiological biprognatism


Characteristics of the opisthognathic bite


Andrews’ occlusion keys 1-st key


Andrews’ occlusion keys 2-nd key


Andrews’ occlusion keys 3-rd key


Andrews’ occlusion keys 4-th key



2 mm

*Pathological Types of Occlusion

1. Prognathic (distal) occlusion


Classification occlusion anomalies by Angle

2. Progenic (mesial) occlusion (3-rd cl)


3. Open occlusion


4. Deep occlusion


5. Cross occlusion

- anterior - posterior


6. Neutral occlusion with anomalous position of individual

teeth

*Pathological Types of OcclusionClassification occlusion anomalies

by Angle Class II div.1 Class II div. 2


Classification occlusion anomalies by Angle

III class

lecture №1. facial and jaw signs: facial signs - symmetrical - proportionality jaw signs -...

Documents

symmetrical slide

class slide

open occlusion slide

deep occlusion slide

lower teeth slide

equial slide

coinsides slide

posterior slide