Efficacy of cone beam computed tomography for assessment of impacted mandibular third
molars: a review based on a hierarchical model of evidence
Engelsk titel: Efficacy of cone beam computed tomography for assessment of impacted mandibular third
molars: a review based on a hierarchical model of evidence
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Författare:
Matzen, Louise Hauge
;
Wenzel, Ann
Språk: Eng
Antal referenser: 72
Dokumenttyp:
Översikt
UI-nummer: 15093426
Sammanfattning
A radiographic examination of mandibular third
molars is meant to support the surgeon in
establishing a treatment plan. For years panoramic
(PAN) imaging has been the first choice
method; however, where an overprojection is
observed between the third molar and the mandibular
canal and when specific signs suggest
a close contact between the molar and the canal,
cone beam computed tomography (CBCT)
may be indicated. The present review provides
an evaluation of the efficacy of CBCT for assessment
of mandibular third molars using a
six-tiered hierarchical model by Fryback and
Thornbury (1991). Levels 1-3 include studies on
low evidence levels mainly regarding the technical
capabilities of a radiographic method and
the diagnostic accuracy of the related images.
Levels 4-6 include studies on a higher level of
evidence and assess the diagnostic impact of
a radiographic method on the treatment of the
patient in addition with the outcome for the patient
and society including cost calculations.
Only very few high-evidence studies on the
efficacy of CBCT for radiographic examination
of mandibular third molars exist and in conclusion,
periapical or PAN examination is sufficient
in most cases before removal of mandibular
third molars, but CBCT may be suggested
when one or more signs for a close contact
between the tooth and the canal are present
in the 2D image - if it is believed that CBCT
will change the treatment or the treatment outcome
for the patient. Further research on highevidence
levels is needed.