Three-dimensional spiral computed tomographic imaging: A new approach to the diagnosis and treatment planning of impacted teeth

Introduction: The aim of this investigation was to explore the validity of 3-dimensional (3D) spiral computed tomographic (CT) images to examine impacted teeth before surgical or orthodontic treatment. Methods: Two patients with impacted teeth were examined with both spiral CT and traditional radiographs. Results: 3D CT images clearly showed the impacted teeth, including crown, root neck, and root bifurcation; the labial or palatal location; and the eruption orientation and relationship to the dentition. Conclusion: 3D CT images obtained with 3D surface reconstruction of spiral CT images is accurate and effective for examining impacted teeth before orthodontic treatment.