| 朱雨晴,汪俊,陈晖.体外研究基牙位置和树脂粘接面积对金属丝-复合树脂夹板刚度的影响[J].口腔材料器械杂志,2015,24(1):14-18. |
| 体外研究基牙位置和树脂粘接面积对金属丝-复合树脂夹板刚度的影响 |
| Influence of abutment teeth position and adhesive point dimension on the rigidity of wire-composite splint in vitro |
| 投稿时间：2014-06-30 修订日期：2014-07-25 |
| DOI：10.11752/j.kqcl.2015.01.04 |
| 中文关键词: 基牙位置 粘接面积 金属丝-复合树脂夹板 刚度 体外牙外伤 |
| 英文关键词:Abutment position Adhesive point dimension Wire-composite splint Rigidity Dental trauma |
| 基金项目:上海市科学技术委员会医学引导项目(124119b0101) |
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| 中文摘要: |
| 目的 通过体外模型探讨改变基牙位置和树脂粘接面积对牙外伤金属丝- 复合树脂夹板刚度的影响.方法 建立体外外伤牙模型,将11、21 牙槽窝扩大模拟外伤牙,分别以12/22 和13/23 为基牙,用0.8mm 不锈钢丝对11、21 进行金属丝- 树脂夹板固定.根据基牙位置和树脂粘接面积不同,实验共分4 组:组1 以13、23 为基牙,树脂粘接面积为2mm×2mm;组2~ 组4 以12、22 为基牙,树脂粘接面积分别为2mm×2mm,3mm×3mm、4mm×4mm.使用万能材料试验机测量夹板固定前后水平和垂直向牙动度,比较各组别固定前后的牙动度差异,及各组别间牙动度差异.结果 ①各组固定后水平和垂直向牙动度均明显大于正常牙动度(P<0.05),夹板固定后水平向牙动度11 为0.36~0.72mm,21 为0.35~0.56mm,11 和21 垂直向牙动度为0.11~0.30mm.②基牙位置对夹板固定后牙动度无明显影响(P>0.05).③随着数值粘接面积的增大,组3 和组4 的夹板固定后水平向牙动度较组2 明显减小(P<0.05).结论 在体外模型上,外伤牙双侧相隔一个牙位固定并不显著影响夹板的刚度;树脂粘接面积的增大可明显影响外伤牙固定后的水平向牙动度,但对垂直向牙动度的影响则较小. |
| 英文摘要: |
| Objective The aim of this study was to evaluate the influence of abutment teeth position and adhesive point dimension on the rigidity of wire-composite splints in vitro, and to provide some theoretical basis for the choice of dental trauma splint in clinic. Methods A commercial resin artificial model was used, where teeth 11 and 21 served as injured teeth (degrees of loosening II and III), where teeth 12, 22, 13 and 23 served as abutment teeth (physiological mobility). Teeth were splinted with stainless steel wire-composite splint (0.8 mm). Grouped according to the abutment teeth position and adhesive point dimension: Group 1, 13 and 23 served as abutment teeth and adhesive point dimension was 2×2mm; Group 2 to 4, 12 and 22 served as abutment teeth and adhesive point dimension was respectively 2×2mm,3×3mm and 4×4mm. Simulated physiological mobility was measured by universal testing machine. Results ① Tooth mobility after splinting of each group were significantly greater than physical tooth mobility. 11's tooth mobility after splinting was 0.36-0.72mm and 21's was 0.35-0.56mm. 11 and 21's vertical mobility after splitting was 0.11-0.30mm. ② Abutment position did not significantly affect tooth mobility after splinting. ③ With the adhesive point dimension increased, the horizontal tooth mobility of group 3 and group 4 after splinting was significantly decreased when compared with group 2. Conclusion The abutment teeth position did not significantly influence the splint rigidity. Adhesive point dimension could influence the horizontal tooth mobility of injured teeth after splinting, but had little effect on the vertical mobility. |
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