Common Errors in Digital Panoramic Radiographs of Patients with Mixed Dentition and Patients with Permanent Dentition
Table 3
Frequency of errors in the diagnostic and nondiagnostic radiographs*.
Error
Mixed dentition
Permanent dentition
Diagnostic (55%)
Nondiagnostic (45%)
Diagnostic (61%)
Nondiagnostic (39%)
Pt. too far forward
34.0%
12.5%
9%
12.3%**
Pt. too far back
7.6%
28.1%
16.9%
36.8%
Head twisted
0
1.6%
3.4%
7/0%
Head tilted
12.7%
12.5%
14.6%
14.0%
Chin tipped too low
11.4%
21.9%
13.5%
19.3%
Chin raised too high
13.9%
32.8%
20.2%
17.5%
Slumped position
0
4.7%
14.6%
36.8%
Chin not on chin rest
11.4%
12.5%
48.3%
47.4%
Tongue not on plate
64.6%
54.7%
56.2%
47.4%
Bite guide not used
0
0
1.3%
0
Pt. moves
0
4.7%
1.1%
1.8%
Pt. wears jewelry
5.0%
6.3%
3.4%
3.5%
*The following errors were excluded since they did not appear in both groups: no home base, use of lead apron which fits intraoral radiographs or thyroid protector, and cassette resistance.
**
, chi-Square test.
