新研制的双层复合树脂牙用于冠预备训练的评价。

Xuan Qi, Xiao Li Li, Yang Yang, Li Chen, Jian Guo Tan
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引用次数: 0

摘要

目的:评价和比较常规复合树脂牙与新开发的双层复合树脂牙在临床前牙学生培养中的冠制备性能。方法:采用两层不同颜色和硬度的复合树脂牙。将23名牙科本科学生(男8名,女12名)随机分为对照组(第一组,使用常规复合树脂牙;n = 10)或实验组(第2组,采用双层复合树脂牙;N = 10)制备金属陶瓷冠。为了练习,每个学生每天准备一颗牙齿,连续2天。在练习前后的基线测试和最终测试中,两组均使用传统牙齿。由两名经验丰富的指导员记录手术时间,并对准备好的牙齿进行盲目评分。比较组内和组间时间和评分差异(α = 0.05)。结果:两组学生在期末测试中花费的时间均少于基线测试(P < 0.05),取得的成绩均优于基线测试(P < 0.01)。两组手术时间差异无统计学意义(P > 0.05),但第2组得分显著高于第2组(P < 0.05)。结论:使用双层复合树脂牙进行训练,学生在操作时间上进步更快,成绩更高。因此,在冠预备的教学实践中使用这种新开发的牙齿会产生很好的效果。
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Evaluation of Newly Developed Double-layer Composite Resin Teeth for Crown Preparation Training.

Objective: To evaluate and compare the crown preparation performance of preclinical dental students training with conventional composite resin teeth and newly developed double-layer composite resin teeth.

Methods: The newly developed composite resin teeth consisted of two layers with different colours and hardnesses. Twenty third-year undergraduate dental students (8 men, 12 women) were randomly assigned to the control group (Group 1, using conventional composite resin teeth; n = 10) or the experimental group (Group 2, using double-layer composite resin teeth; n = 10) to prepare metal-ceramic crowns. To practice, each student prepared one tooth per day for 2 days. For the baseline test and final test before and after the practice period, both groups used traditional teeth. The operation time was recorded and the prepared teeth were scored blindly by two experienced instructors. The time and scores were compared within and between groups to determine the difference (α = 0.05).

Results: Students in both groups spent less time (P < 0.05) and achieved better scores (P < 0.001) on the final test than the baseline test (P < 0.01). In the final test, no significant difference in operating time was found between the two groups (P > 0.05), but Group 2 yielded significantly higher scores (P < 0.05).

Conclusion: Training with the double-layer composite resin teeth enabled students to progress more quickly in terms of operating time and achieve higher scores. Use of this newly-developed tooth in crown preparation teaching practice therefore yields highly promising results.

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