导板引导下精准微创根管治疗后牙体组织抗折性能的评价

Evaluation on the fracture resistance of dental tissues after guided plate-mediated precision minimally invasive root canal treatment

目的:为实现精准微创的根管治疗,增强根管治疗后牙体组织的抗折性能,本研究探索数字化导板介导下开髓治疗,并对其与常规开髓治疗后牙体组织的抗折性能进行比较,以期为临床提供一种更有利的治疗方法。方法:本实验收集40颗新鲜拔除的下颌第一恒磨牙,随机分为对照组与实验组(各20颗),对照组采用常规根管治疗,实验组采用精准微创根管治疗。比较2组开髓操作时间和开髓孔面积占面总面积比例的差异,使用万能试验机对研究对象进行载荷试验,测量2组研究对象牙体组织的抗折性能。采用SPSS 24.0软件包对数据进行统计学分析。结果:常规根管治疗组(对照组)开髓操作时间(1.85±0.05)min,开髓孔面积占面总面积(9.18±0.48)%,牙体组织的载荷为(1.48±0.07)kN;精准微创根管治疗组(实验组)开髓操作时间(0.72±0.10)min,开髓孔面积占面总面积为(3.53±0.13)%,牙体组织的载荷为(1.81±0.03)kN。数字化导板介导下精准微创根管治疗与传统开髓根管治疗相比,开髓时间短,开髓孔面积小,牙体组织的抗折性能强,两者之间差异有统计学意义(P<0.01)。结论:离体牙体外实验表明,数字化导板介导下精准微创根管治疗可减小开髓面积,缩短椅旁操作时间,保留更多健康牙体组织,增强根管治疗后牙体组织的抗折性能,提高患牙保存率。

PURPOSE:In order to achieve accurate and minimally invasive root canal treatment and enhance the fracture resistance of tooth tissue after root canal therapy,this study explores digital guided mediated minimally invasive root canal treatment and compares it with conventional root canal treatment to provide a more favorable method for clinical practice.METHODS:Forty freshly extracted first permanent molars were randomly divided into control group and experimental group.Teeth in the control group were treated with conventional root canal treatment,while teeth in the experimental group were treated with precise minimally invasive root canal treatment.The difference between the time of opening of the pulp chamber and the area of the open pores on the total area of the occlusal surface was compared.Loading test was carried out on the subjects using a universal testing machine,and the fracture resistence of the tooth tissues of the two groups were measured.Statistical analysis was performed using SPSS 24.0 software package.RESULTS:In the control group,the time required for opening the pulp chamber was(1.85±0.05)min,the open pore area was(9.18±0.48)%of the total occlusal area,and the load of the tooth tissue was(1.48±0.07)kN.In the experimental group,the time required was(0.72±0.10)min,the open pore area was(3.53±0.13)%of the total occlusal area,and the load of the tooth tissue was(1.81±0.03)kN.The higher the loading value,the stronger the fracture resistance of the tooth tissue.Compared with traditional root canal treatment,digital guided plate mediated minimally invasive root canal treatment had the advantages of short time,small access cavity and strong fracture resistance of tooth tissue.The difference between the two groups was significant(P<0.01).CONCLUSIONS:Digital guided plate-mediated accurate minimally invasive root canal treatment can reduce the occlusal area,shorten the operation time beside the chair,retain more healthy tooth tissue,enhance the fracture resistance of tooth tissue after root canal treatment,and improve the retention rate of affected teeth.