Surface Treatment on Physical Properties and Biocompatibility of Orthodontic Power Chains

Table 2

Absorption rates of orthodontic power chains before and after surface treatment (3M Alastik/Dyna-link).

	Weight before absorbing water (g)	Weight after absorbing water (g)	Weight difference (g)	Water absorption rate (%)
No surface modification	0.005/0.004	0.0052/0.0042	0.0002/0.0002	4%/5%
A	0.0054/0.004	0.0056/0.0042	0.0002/0.0002	3.7%/5%
B	0.0051/0.0034	0.0052/0.0036	0.0001/0.0002	2%/4.4%
C	0.0047/0.0047	0.0049/0.0048	0.0002/0.0001	4.2%/2.1%
D	0.0049/0.0044	0.0051/0.0048	0.0002/0.0004	4%/5.5%