数字化曲面体层摄影中颌弓长度及宽度对下颌后牙区影像垂直失真度的影响

Abstract

Abstract: Objective To discuss the effect of different mandibular arch widths and lengths on uprightness distortion ratio of the mandibular posterior area in digital pantomography with cone beam CT (CBCT) as the reference. Methods 150 cases of patients with pantomography and CBCT were selected. The mesial and distal alveolar bone heights between adjacent teeth in mandibular posterior area were both measured, and the results were analyzed. Results Compared with CBCT,in digital pantomography, the uprightness distortion ratio of the mandibular molar area was (3.85+2.03)%,while that of the premolar area was (4.78+2.15)%. When the arch width was 40.3-42.5 mm and the length was 20.5-23.4 mm, the distortion ratio was in its minimum, and the ratio was (1.95+0.13)% in molar area and (2.88+0.25)% in premolar area. Conclusion The width and length of mandibular arch are important factors affecting uprightness distortion ratio in the digital pantomography.

Key words: CBCT, digital pantomography, mandibular arch width and length, uprightness distortion ratio

CLC Number:

R780.4

References

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Effect of mandibular arch width and length on uprightness distortion ratio of the mandibular posterior area in digital pantomography

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