Table 2 Cephalometric variables used for craniofacial structures and adenoids
Abbreviation | Â | Name | Description |
|---|---|---|---|
Measured variables (for calculation of variables included in the analysis) | |||
At | mm | Nasopharyngeal soft tissue thicknesses of adenoid | The largest distance between BasL and the anterior border of the adenoids |
Ad-Ba | mm | Retropalatal soft tissue thickness of adenoid | The distance between Ad and Ba |
Nd | mm | Nasopharyngeal depth | The distance between PNS and Sy |
Npa | mm2 | Nasopharyngeal area | The area bounded by PmL, EsfL, MxPl and AaL |
Npaa | mm2 | Nasopharyngeal adenoid area | The area occupied by the adenoids within Npa |
PNS-Ad | mm | Airway sagittal depth | The distance between PNS and Ad |
TAFH | mm | Total anterior facial height | The distance between N and Me |
TPFH | mm | Total posterior facial height | The distance between S and Go |
Measured variables (directly included in the analysis) | |||
ANB | ° | ANB angle | The angle between N-A line and N-B line |
C2ps-C4pi^SN | ° | Total craniocervical angle | The angle between C2ps-C4pi line and S–N line |
Cd-Gn | mm | Mandibular length | The distance between Cd and Gn |
H-CV | mm | Horizontal position of hyoid bone | The length of the segment from H to CV on a line that is parallel to FH |
H-FH | mm | Vertical position of hyoid bone | The distance between H and FH |
MnP^SN | ° | Mandibular plane angle | The angle between MnP and S–N line |
MxP^MnP | ° | Maxillo-mandibular planes angle | The angle between MxP and MnP |
OPT^SN | ° | Upper craniocervical angle | The angle between OPT and S-N line |
SNA | ° | SNA angle | The angle between S-N line and N-A line |
SNB | ° | SNB angle | The angle between S-N line and N-B line |
Wits | mm | Wits appraisal | The distance between the projections of A and B on OP |
Calculated variables (included in the analysis) | |||
At/Nd | % | Adenoid/nasopharyngeal ratio | The ratio of At to Nd |
Ad-Ba/PNS-Ba | % | Adenoid/retropalatal ratio | The ratio of Ad-Ba to PNS-Ba |
1-Npaa/Npa | % | Adenoid/nasopharyngeal area ratio | 1 minus the ratio of Npaa to Npa |
TPFH/TAFH | % | Jarabak ratio | The ratio of TPFH to TAFH |