LECTURE №3

Class ІІ (distal bite) division 1- existing gap in sagittal plane division 2- no gap in sagittal plane Class ІІІ (mesial bite)

Class ІІ (distal bite) division 1- existing gap in sagittal plane

Class ІІ (distal bite) division 2- no gap in sagittal plane

Class ІІІ (mesial bite)

Base on a functional pathology of the masticatory muskles group II (corresponds to class ІІ by Angle). Protractors hypofunction group III (corresponds to class ІІI by Angle). Protractors overactivity

Signs shift of the mandible during interdigitation sagittal anomalies posterial (distal) bite anterial (mesial) bite А. Without displacement LJ B. With displacement LJ C. The combined forms (there are signs of both)

 Sagittal bite anomalies Distal occlusion Distal occlusion: 1-st form - lower micrognathia 2-nd form - upper macrohnathia 3rd form - upper makrognathia and lower mikrognatiya 4th form - maxillary prognathism with narrowing in the lateral parts Mesial occlusion Mesial occlusion: 1-st form - upper micrognathia 2-nd form - lower makrognathia 3rd form – upper micrognathia and lower makrohnatiya

mandible maxilla dentures cranium

mandible maxilla dentures  Sagittal bite anomalies Distal occlusion Distal occlusion: 1-st form - lower micrognathia cranium

maxilla dentures  Sagittal bite anomalies Distal occlusion Distal occlusion: 2-nd form - upper macrohnathia mandible cranium

maxilla dentures  Sagittal bite anomalies Distal occlusion Distal occlusion: 3rd form - upper makrognathia and lower mikrognatiya mandible cranium

maxilla dentures  Sagittal bite anomalies Mesial occlusion Mesial occlusion: 1-st form - upper micrognathia mandible cranium

dentures  Sagittal bite anomalies Mesial occlusion Mesial occlusion: 2-nd form - lower makrognathia mandible maxilla cranium

dentures  Sagittal bite anomalies Mesial occlusion Mesial occlusion: 3rd form – upper micrognathia and lower makrohnatiya mandible maxilla cranium

 Heredity  Prenatal factors  Obstetric intervention in childbirth  The nature of feeding  The nature of food  Violation of nasal breathing  Rickets  Bad habits

 Facial features: - Extension UJ; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

 Facial features: - Extension UJ ; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

maxilla dentures  Facial features: - Extension UJ mandible cranium

 Facial features: - Extension UJ; - Distal position LJ ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

mandible maxilla dentures  Facial features: - Distal position LJ cranium

 Facial features: - Extension UJ; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

 Facial features: - Height of the lower third of the face (decrease);

 Facial features: - Extension UJ; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

 Intraoral features: - molars and premolars are located on the second class

 Facial features: - Extension UG; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

 Intraoral features: - gap for sagittal in the frontal area (II-1)

 Facial features: - Extension UG; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

 Intraoral features: - by vertical- deep bite; open bite

 Facial features: - Extension UG; - Distal position LJ; - Height of the lower third of the face (decrease);  Intraoral features: - molars and premolars are located on the second class; - gap for sagittal in the frontal area (II-1); - by vertical- deep bite; open bite; - by transversal - often cross bite.

 Intraoral features: - by transversal - often cross bite

 Clinical probe (Eshler-Bittner)  Ceph

 Depends on: - The patient's age; - Clinical forms; - Severity of disease.

 Depends on: - The patient's age; - Clinical forms; - Severity of disease.

 In variable bite: - Sanitation the nasopharynx; - Rational feeding; - Myoexercise; - Elimination of bad habits; - Instrumental treatment.

 In permanent bite: - mechanical devices

 In the permanent occlusion: - Appliances of mechanical action; - Orthognathyc surgery; - Additional treatments.

 Heredity  Prenatal factors  Bad habits

 Physiological.  Pathological.

 Facial features: - Protrusion LJ; - Increasing the height of the lower third of the face.  Intraoral features: - Closing molars and canines; - The ratio of frontal teeth; - Narrowing UJ (lateral cross-bite).

 Facial features: - Protrusion LJ; - Increasing the height of the lower third of the face.  Intraoral features: - Closing molars and canines; - The ratio of frontal teeth; - Narrowing UJ (lateral cross-bite).

 Facial features: - Protrusion LJ;

 Facial features: - Protrusion LJ; - Increasing the height of the lower third of the face.  Intraoral features: - Closing molars and canines; - The ratio of frontal teeth; - Narrowing UJ (lateral cross-bite).

 Facial features: - Increasing the height of the lower third of the face

 Facial features: - Protrusion LJ; - Increasing the height of the lower third of the face.  Intraoral features: - Closing molars and canines ; - The ratio of frontal teeth; - Narrowing UJ (lateral cross-bite).

 Intraoral features: - Closing molars and canines

 Facial features: - Protrusion LJ; - Increasing the height of the lower third of the face.  Intraoral features: - Closing molars and canines; - The ratio of frontal teeth ; - Narrowing UJ (lateral cross-bite).

 Intraoral features: - The ratio of frontal teeth

 Facial features: - Protrusion LJ; - Increasing the height of the lower third of the face.  Intraoral features: - Closing molars and canines; - The ratio of front teeth; - Narrowing UJ (lateral cross-bite).

 Intraoral features: - Narrowing UJ (lateral cross- bite).