retention force造句怎麼寫
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Objective The friction coefficient between the clasp and enamel was measured as one base of calculating the retention force of clasp quantitatively.
Conclusion: the number, site and dislocation direction of the attachment affect retention force of bar-clip implant overdenture.
The effect of different luting cements on casting metal full crown retention force
Objective: to study on retention force of dentures with various amount and distribution of attachments, provided reference to clinic use.
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