A new criterion to decide whether the carboxy group coordinating to the metallic ion in mono or bi dentate-fashion in an ambiguous situation, base on coordination bond distances and angles.

通过上述晶体结构中配位键长键角的分析，得到了一个行之有效的标准，判断羧基与中心金属离子是单齿配位还是螯合配位。

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Objective The purpose of this study was to investigate the influence of different base designs and adhesives on the bond strength of metallic orthodontic bracket.

目的观察不同种类的底板结构及黏接剂对金属托槽粘接强度的影响。

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The effect and working mechanism of skeleton material, carbide-forming elements, rare-earth and non-metallic elements in the bond are discussed.

重点阐述了骨架材料、碳化物形成元素、稀土、非金属元素等在金属结合剂的作用及其影响机理。

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