Definition of Impaction
A tooth that has not completely erupted into the oral cavity by the time it would ordinarily have been expected to do so.
Likely Impactions
The most commonly impacted teeth are:
Maxillary and mandibular 3rd molars
Maxillary canines
Mandibular premolars
Mandibular canines
AAOMS Parameters of Care (1995)
Indications for Removal
Pericoronitis
Caries
Periodontal Disease
Resorption/Caries in Adjacent Tooth
Cysts/Tumors
[Orthodontic Purposes]
Prophylaxis
prevention of future pathology
controversial
Is Prophylactic Removal Warranted?
No
evidence of pathologic potential is mostly anecdotal
cost-benefit analysis does not support it
procedure is morbid and may cause lasting injury (sensory dysfunction)
Yes
surgery at younger age allows better periodontal healing, faster recovery, less risk of morbidity than later (age 30 or over)
delaying removal requires second anesthetic, second surgery, greater social costs
Yes (continued)
early surgery prevents later suffering
morbidity from surgery is low and only increases with age
Impaction Classification
Angulation
Relative Position
Depth of Impaction
Angulation
Mesioangular
Horizontal
Vertical
Distoangular
Position Pell & Gregory
Relative to 2nd Molar: A
Relative to 2nd Molar: B
Relative to 2nd Molar: C
Relative to Ramus: 1
Relative to Ramus: 2
Relative to Ramus: 3
Depth
Soft Tissue
Partial Bony
Full (Complete) Bony
Other Considerations
Follicle Size
Relationship to inferior alveolar nerve
Relationship to maxillary sinus
التعليقات
http://sanandreasgames.ru/