A simplified guide ruler from numeric table method in doing rotational osteotomy

Table 1 Summary of the difference between the correction chord distance

Correction angle	Chord diatance by Čobeljić et al.³	Chord distance by our ruler	Absolute Difference
1°	0.4 mm	0.4 mm	0 mm
5°	2.1 mm	2.1 mm	0 mm
10°	4.3 mm	4.2 mm	0.1 mm
20°	8.5 mm	8.5 mm	0 mm
30°	12.7 mm	12.6 mm	0.1 mm
40°	16.8 mm	16.7 mm	0.1 mm
50°	20.7 mm	20.7 mm	0 mm
60°	24.9 mm	24.8 mm	0.1 mm
70°	28.1 mm	28.1 mm	0 mm
80°	31.5 mm	31.5 mm	0 mm
90°	34.6 mm	34.6 mm	0 mm
Mean			0.03 mm
Standard deviation			0.05 mm

Summary of the difference between the correction chord distance proposed by the table from Čobeljić et al. and our method for a range of correction from 1° to 90°. The data for other degrees of osteotomy are not shown.

ISSN: 1471-2474