| 摘要 |
An orthodontic bracket includes a bracket base and an arch wire slot in the bracket base. The bracket base comprises a polymer resin that is reinforced with glass or ceramic fibers and/or a particulate filler (e.g., a glass spherical particle filler). The bracket may include a ligation cover, which may be hingedly connected to the bracket base and rotatable relative to the bracket base between an open, non-ligating position and a closed, ligating position. The combination of reinforcing fibers and particulate filler provides substantially increased overall strength and durability while providing increased flexibility and toughness to the bracket.
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