Jungnickel Luise, Kruse Casper, Vaeth Michael, Kirkevang Lise-Lotte
a Section of Oral Radiology, Department of Dentistry and Oral Health , Aarhus University , Aarhus , Denmark.
b Section for Biostatistics, Department of Public Health , Aarhus University , Aarhus , Denmark.
Acta Odontol Scand. 2018 Apr;76(3):169-174. doi: 10.1080/00016357.2017.1396494. Epub 2017 Oct 29.
To evaluate factors associated with treatment quality of ex vivo root canal treatments performed by undergraduate dental students using different endodontic treatment systems.
Four students performed root canal treatment on 80 extracted human teeth using four endodontic treatment systems in designated treatment order following a Latin square design. Lateral seal and length of root canal fillings was radiographically assessed; for lateral seal, a graded visual scale was used. Treatment time was measured separately for access preparation, biomechanical root canal preparation, obturation and for the total procedure. Mishaps were registered. An ANOVA mirroring the Latin square design was performed.
Use of machine-driven nickel-titanium systems resulted in overall better quality scores for lateral seal than use of the manual stainless-steel system. Among systems with machine-driven files, scores did not significantly differ. Use of machine-driven instruments resulted in shorter treatment time than manual instrumentation. Machine-driven systems with few files achieved shorter treatment times. With increasing number of treatments, root canal-filling quality increased, treatment time decreased; a learning curve was plotted. No root canal shaping file separated.
The use of endodontic treatment systems with machine-driven files led to higher quality lateral seal compared to the manual system. The three contemporary machine-driven systems delivered comparable results regarding quality of root canal fillings; they were safe to use and provided a more efficient workflow than the manual technique. Increasing experience had a positive impact on the quality of root canal fillings while treatment time decreased.
评估本科牙科学生使用不同牙髓治疗系统进行离体根管治疗的治疗质量相关因素。
四名学生按照拉丁方设计，以指定的治疗顺序使用四种牙髓治疗系统对80颗拔除的人牙进行根管治疗。通过X线片评估根管充填的侧方封闭和长度；对于侧方封闭，使用分级视觉量表。分别测量开髓预备、根管机械预备、充填以及整个治疗过程的治疗时间。记录失误情况。进行了反映拉丁方设计的方差分析。
与使用手动不锈钢系统相比，使用机用镍钛系统在侧方封闭方面总体质量得分更高。在使用机用锉的系统中，得分无显著差异。使用机用器械比手动器械治疗时间更短。锉数量少的机用系统治疗时间更短。随着治疗次数增加，根管充填质量提高，治疗时间缩短；绘制了学习曲线。没有根管预备锉分离。
与手动系统相比，使用带机用锉的牙髓治疗系统能实现更高质量的侧方封闭。三种当代机用系统在根管充填质量方面结果相当；它们使用安全，并且比手动技术提供了更高效的工作流程。经验增加对根管充填质量有积极影响，同时治疗时间减少。
