LectureLecture

Impacted teeth.Impacted teeth.

Odontogenic periostitis of Odontogenic periostitis of jaws.jaws.

IMPACTED TEETHIMPACTED TEETH

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

Causes of Impacted Causes of Impacted TeethTeeth Role of civilizationRole of civilization

Local causes of ImpactionLocal causes of Impaction

Systemic causes of impactionSystemic causes of impaction

Local causes of Local causes of ImpactionImpaction

Lack of space in the dental arch for eruption ;Lack of space in the dental arch for eruption ;

The density of the overlying or surrounding boneThe density of the overlying or surrounding bone ;;

Long continued chronic inflammation with Long continued chronic inflammation with resultant increase in the density of the overlying resultant increase in the density of the overlying mucous membranemucous membrane ;;

Premature loss of the primary teethPremature loss of the primary teeth ;;

Acquired diseases, such as necrosis due to Acquired diseases, such as necrosis due to infection or abscesses, and inflammatory changes infection or abscesses, and inflammatory changes in the bone due to exanthematous diseases in in the bone due to exanthematous diseases in children;children;

Lack of space in the dental Lack of space in the dental arch arch for eruptionfor eruption

Impacted teeth occur Impacted teeth occur in the following order in the following order

Mandibular third molarsMandibular third molars Maxillary third molarsMaxillary third molars Maxillary cuspidsMaxillary cuspids Mandibular bicuspidsMandibular bicuspids Mandibular cuspidsMandibular cuspids Maxillary bicuspidsMaxillary bicuspids Maxillary central incisorsMaxillary central incisors Maxillary lateral incisorsMaxillary lateral incisors Maxillary or mandibular first molars are Maxillary or mandibular first molars are

rarely impactedrarely impacted

Impacted teethImpacted teeth

Classification of Classification of impacted mandibular impacted mandibular third molarsthird molars

A. Relation of the tooth to the ramus of the A. Relation of the tooth to the ramus of the mandible and the second molarmandible and the second molar ;;

B. Relative depth of the third molar in bone;B. Relative depth of the third molar in bone;

C. The position of the long axis of the C. The position of the long axis of the impacted mandibular third molar in relation impacted mandibular third molar in relation to the long axis of the second molar : to the long axis of the second molar : vertical, horizontal, inverted, mesioangular, vertical, horizontal, inverted, mesioangular, distoangular, buccoangular, linguangular.distoangular, buccoangular, linguangular.

Classification of Classification of impacted mandibular impacted mandibular third molarsthird molars

Radiographic visualization of Radiographic visualization of impacted teethimpacted teeth

The removal of impacted The removal of impacted mandibular third molarsmandibular third molars

Scheme of PericonitisScheme of Periconitis

Scheme of Periostitis Scheme of Periostitis ( upper jaw ) ( upper jaw )

Scheme of Periostitis Scheme of Periostitis ( lower jaw ) ( lower jaw )

Acute Periostitis left Acute Periostitis left upper jawupper jaw

Acute Periostitis leftAcute Periostitis left lover jaw lover jaw

Acute Periostitis Acute Periostitis of hard pallateof hard pallate

Surgical treatment Surgical treatment of periostitisof periostitis

Treatment of abscess Treatment of abscess of hard pallatineof hard pallatine