Correlation between the Rotation of the First Molars and the Severity of Class II Division 1 Malocclusion

Table 2

Mean, standard deviation, statistical significance, and error for assessment of interexaminer error.

Indicator	Mean 1	Mean 2	SD 1	SD 2			Error
1	15.38 mm	15.59 mm	7.52	7.51	−0.94	0.34	0.97
2	60.95 mm	60.71 mm	7.69	7.75	1.45	0.15	0.76
3	15.03°	15.17°	4.23	4.07	—	0.19	0.48

SD: standard deviation; rotation in the first maxillary molar was measured initially (mean 1, SD 1) and 90 days later (mean 2, SD 2) by a single examiner.