微钛板磁性附着体的微钛钉稳定性实验研究  

Experimental study on micro-titanium nail stability of magnetic attachment of micro-titanium plate

作　　者：李振春[1] 韩日和 邢文忠[1] 

机构地区：[1]大连市口腔医院,辽宁大连116021

出　　处：《中国实用口腔科杂志》2013年第11期685-687,共3页Chinese Journal of Practical Stomatology

基　　金：大连市科技局社发基金(2012E15SF150)

摘　　要：目的测定微钛板系统中微钛钉的最大拉力值,探讨微钛钉的固位力可否满足全口覆盖义齿的临床使用要求。方法本研究于2013年3月在大连市口腔医院和大连理工大学完成。将微钛板系统中的微钛钉拧入经修整后的新鲜猪下颌骨内,使用电子万能实验机测量微钛钉的最大抗拉力值。结果微钛钉最高抗拉力值为564.25 N,最低抗拉力值为441.08 N,平均抗拉力值为(513.15±44.92)N。结论微钛板系统的最大抗拉力值远远高于全口义齿在咀嚼食物时的最大咬合力及磁性附着体的固位力,其应用于全口覆盖义齿中是可行的。Objective To evaluate that the retentive force of the micro-titanium nails can satiate the clinical appliance requirements of the full overdenture. Methods Two piece of the micro-titanium nails with 2 mm in diameter and 5mm in length were parallel screwed into modified and freshly isolated pig mandibles. The fixed micro-titanium plates were placed into the trench. The trench was fixed on a base of electronic universal testing machine. The specimens were load- ed in tensile at crosshead rate of lmm/min with a 1000N in frame. Results The maximum tensile strength among the groups is 564.25N, the minimum is 441.08 N,and the average is（513.15±44.92）N. Conclusion The maximum tensile strength of the micro-titanium plate and micro-titanium nail system is much higher than the attraction of magnetic at- tachment and the maximum occlusal force which is met when patients are chewing food with complete denture, it could satiate the clinical appliance requirements of the full overdenture.

关 键 词：拉力值 微钛钉 微钛板 猪下颌骨 

分 类 号：R78[医药卫生—口腔医学]