When to remove an impacted third molar - one or more of the following:
(1) partial eruption (partially impacted and partially exposed)
(2) crowding of teeth
(3) an episode of pericoronitis
(4) radiographic evidence of bone resorption
(5) radiographic evidence of root resorption in the adjacent second molar
(6) concern about or development of a dentigerous cyst
(7) need to place an overlying dental prosthesis
(8) caries, either in the adjacent second molar caused by the third molar or in the third molar
(9) poor oral health with periodontal disease
When not to remove an impacted third molar - all of the following:
(1) complete impaction
(2) asymptomatic and without pathogenic change
(3) either of the following
(3a) age 35 to 40 and no overlying dental prosthesis
(3b) age > 40
