1. Impacted teeth. Odontogenic periostitis of jaws.
Lecture
Impacted teeth.
Odontogenic periostitis of jaws.

2. IMPACTED TEETH
An impacted tooth is one that is partially erupted or unerupted and will not eventually assume a normal arch relationship withother teeth and tissues.

3. Causes of Impacted Teeth
Role of civilization
Local causes of Impaction
Systemic causes of impaction

4. Local causes of Impaction
Lack of space in the dental arch for eruption ;
The density of the overlying or surrounding bone ;
Long continued chronic inflammation with resultant increase in the density of the overlying mucous membrane ;
Premature loss of the primary teeth ;
Acquired diseases, such as necrosis due to infection or abscesses, and inflammatory changes in the bone due to exanthematous diseases in children;

5. Lack of space in the dental arch for eruption

6. Impacted teeth occur in the following order
Mandibular third molars
Maxillary third molars
Maxillary cuspids
Mandibular bicuspids
Mandibular cuspids
Maxillary bicuspids
Maxillary central incisors
Maxillary lateral incisors
Maxillary or mandibular first molars are rarely impacted

7. Impacted teeth

8. Classification of impacted mandibular third molars
A. Relation of the tooth to the ramus of the mandible and the second molar ;
B. Relative depth of the third molar in bone;
C. The position of the long axis of the impacted mandibular third molar in relation to the long axis of the second molar : vertical, horizontal, inverted, mesioangular, distoangular, buccoangular, linguangular.

9. Classification of impacted mandibular third molars

10. Radiographic visualization of impacted teeth

11. The removal of impacted mandibular third molars

12. Scheme of Periconitis

13. Scheme of Periostitis ( upper jaw )

14. Scheme of Periostitis ( lower jaw )

15. Acute Periostitis left upper jaw

16. Acute Periostitis left lover jaw

17. Acute Periostitis of hard pallate

18. Surgical treatment of periostitis

19. Treatment of abscess of hard pallatine