Orthodontics. Definitions. Stages of development. Problems. Structure Orthodontics. Definitions. Stages of development. Problems. Structure. The role of local scientists in the development of the discipline. Teeth alignments, bite. Classification dentoalveolar abnormalities and deformities. Lecture №1

Physiological Types of Occlusion Facial and jaw signs: Facial signs - symmetrical - proportionality Jaw signs - correct harmonious signs: occlusion extraoral Intraoral

Physiological Types of Occlusion right side = left side Facial signs - symmetrical

Physiological Types of Occlusion Facial signs - proportionality The upper and lower anterior face heights should be approximately equial

Physiological Types of Occlusion 1) orthognatic bite 2) straight bite 3) physiological biprognathism 4) opisthognathic bite

Physiological Types of Occlusion Characteristics of the orthognathic bite 1) the upper frontal teeth cover the lower ones by 1/3 length of the lower teeth crowns 1/3 2/3

Physiological Types of Occlusion Characteristics of the orthognathic bite 2) the tubercle of the upper canine tooth crown is located between the lower canine tooth and the 1-st premolar

Physiological Types of Occlusion Characteristics of the orthognathic bite 3) the centerline between the central incisors of the upper and lower jaws is coinsides

Physiological Types of Occlusion Characteristics of the orthognathic bite 4) the mesial-buccal tubercle of the upper 1-st molar is located in the transverse sulcus of the similar lower tooth

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

Physiological Types of Occlusion Characteristics of the orthognathic bite 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

Physiological Types of Occlusion Characteristics of the orthognathic bite 7) the upper dental arch is semielliptical, the lower – parabolic; in temporary occlusion – a semicircle on both jaws

Physiological Types of Occlusion Characteristics of the orthognathic bite 8) the dental arches of the upper and lower jaws are symmetrical

Physiological Types of Occlusion Characteristics of the orthognathic bite 9) in the state of central occlusion there is a full occlusive contact between all teeth (except for unerupted ones)

Physiological Types of Occlusion Characteristics of the orthognathic bite 10) in the state of physiological rest an interocclusive space varying within 2 mm arises between dental arches

Physiological Types of Occlusion Characteristics of the straight bite

Physiological Types of Occlusion Characteristics of the physiological biprognatism

Physiological Types of Occlusion Characteristics of the opisthognathic bite

Physiological Types of Occlusion Andrews’ occlusion keys 1-st key

Physiological Types of Occlusion Andrews’ occlusion keys 2-nd key

Physiological Types of Occlusion Andrews’ occlusion keys 3-rd key

Physiological Types of Occlusion Andrews’ occlusion keys 3-rd key

Physiological Types of Occlusion Andrews’ occlusion keys 4-th key

Physiological Types of Occlusion Andrews’ occlusion keys 5-th key

Physiological Types of Occlusion Andrews’ occlusion keys 6-th key 2 mm

Pathological Types of Occlusion 1. Prognathic (distal) occlusion

Pathological Types of Occlusion Classification occlusion anomalies by Angle 2. Progenic (mesial) occlusion (3-rd cl)

Pathological Types of Occlusion 3. Open occlusion

Pathological Types of Occlusion 4. Deep occlusion

Pathological Types of Occlusion 5. Cross occlusion - anterior - posterior

Pathological Types of Occlusion 6. Neutral occlusion with anomalous position of individual teeth

Pathological Types of Occlusion Classification occlusion anomalies by Angle Class II div.1 Class II div. 2

Pathological Types of Occlusion Classification occlusion anomalies by Angle III class