IADR Abstract Archives
1800 CBCT Scans Reliably Localize Impacted Mandibular Third Molars
Objectives: The objective of the ex-vivo study was to evaluate the accuracy of a low dose 180o CBCT acquisition protocol to localize impacted mandibular third molars and relation to proximal critical structures.
Methods: Twenty five fully or partially dentate human skulls with impacted, partially impacted, or erupted third molars in the mandible were used to provide 35 mandibular third molar sites. Wax was used to simulate soft tissue to simulate clinical conditions. The skulls were imaged using both the 180o and the conventional 360o scan. Two evaluators evaluated the scans twice with an interval of at least two weeks between each session.
Results: The comparison of various measurements of 3rd molar relationships resulted in no significant statistical difference between the 180O and 360O protocols. A Cohen’s Kappa statistical test was done to analyze inter-rater reliability for each measurement. The p-value for the unpaired sample t-test between the Cohen’s kappa analysis was 0.892, showing that the two protocols were significantly similar in all the measurement categories.
Conclusions: This ex vivo CBCT study demonstrates that the 180° rotational CBCT acquisition is reliable in localizing impacted third molars, proximal critical structures and is comparable to the conventional 360° rotational acquisition.
Methods: Twenty five fully or partially dentate human skulls with impacted, partially impacted, or erupted third molars in the mandible were used to provide 35 mandibular third molar sites. Wax was used to simulate soft tissue to simulate clinical conditions. The skulls were imaged using both the 180o and the conventional 360o scan. Two evaluators evaluated the scans twice with an interval of at least two weeks between each session.
Results: The comparison of various measurements of 3rd molar relationships resulted in no significant statistical difference between the 180O and 360O protocols. A Cohen’s Kappa statistical test was done to analyze inter-rater reliability for each measurement. The p-value for the unpaired sample t-test between the Cohen’s kappa analysis was 0.892, showing that the two protocols were significantly similar in all the measurement categories.
Conclusions: This ex vivo CBCT study demonstrates that the 180° rotational CBCT acquisition is reliable in localizing impacted third molars, proximal critical structures and is comparable to the conventional 360° rotational acquisition.
