The purpose of this study was to compare the bracket placement and the shear bond strength of indirect-bonded brackets_ with those of direct-bonded ones. Forty eight extracted human teeth were collected and attached with brackets and tested on shear bond strength, using Instron. Fourteen patients from Wonkwang University Dental Hospital were selected for direct bonding of brackets and their teeth weie measured on brackei argulation and bracket height. .
The obtained results were as follows:
1. The shear bond strengths of incisors were higher in direct- bonding, group, rather than indirect-bonding. group.´ But, the shear bond strength of premolars showed no significant differences between groups.
2. The bracket angulations of indirect-bonding group were preciser than those of direct-bonding group, especially in upper first premolars, lower lateral incisors, canines,; premolars. 3. In bracket height, there were no significant differences between groups.
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