SLM3D打印技术与失蜡铸造技术在可摘局部义齿支架制作中的应用

Application effect of SLM 3D printing technology and lost wax casting technology in the production of removable partial denture brackets

目的分析选择性激光熔融(SLM)3D打印技术与失蜡铸造技术在可摘局部义齿支架制作中的应用效果。方法选取2021年5月至2023年5月汉中市口腔医院收治的86例KennedyⅠ类牙列缺损患者作为研究对象,根据随机数表法将患者分为A组和B组各43例。A组采用SLM3D打印技术行可摘局部义齿支架制作,B组采用失蜡铸造技术行可摘局部义齿支架制作。两组患者于义齿佩戴1周后复诊,比较两组患者口腔内黏膜压痛点数量、义齿支架佩戴效果以及咀嚼效率;两组患者于义齿佩戴1个月后再次复诊,比较两组患者的满意度评分、主观感受评分及并发症发生情况。结果义齿佩戴1周后,A组患者口腔内黏膜平均压痛点为(0.61±0.13)个,明显少于B组的(2.23±0.21)个,A组患者吸光度值为0.61±0.05,明显高于B组患者的0.43±0.03,差异均有统计学意义(P<0.05);义齿佩戴1周后,A组患者的固位性、适合性和稳定性分别为55.81%、53.49%、58.14%,明显高于B组的30.23%、27.91%、32.56%,差异均有统计学意义(P<0.05);义齿佩戴1个月后,A组患者的主观感受评分和满意度评分分别为(28.07±2.75)分、(14.66±3.21)分,明显高于B组患者的(16.55±0.44)分、(6.68±1.32)分,差异均有统计学意义(P<0.05);义齿佩戴1个月后,A组患者的并发症总发生率为6.98%,明显低于B组患者的23.26%,差异有统计学意义(P<0.05)。结论SLM3D打印技术在可摘局部义齿支架制作中的应用效果良好,制作义齿支架较传统失蜡铸造技术偏差更小,具有更高的精确度,同时患者使用舒适度和满意度也更高,值得临床推广应用。

Objective To analyze the application effect of selective laser melting(SLM)3D printing technolo-gy and lost wax casting technology in the production of removable partial denture brackets.Methods Eighty-six pa-tients with KennedyⅠdentition defects admitted to Hanzhong Stomatology Hospital from May 2021 to May 2023 were selected and randomly divided into group A and group B according to the random number table method,each with 43 pa-tients.In group A,SLM 3D printing technology was applied to produce removable partial denture brackets,and in group B,lost wax casting technology was applied to produce removable partial denture brackets.After wearing dentures for one week,the two groups of patients were compared in number of mucosal tenderness points,wearing effect of denture bracket,and chewing efficiency.After wearing the denture for one month,the two groups of patients were compared in the satisfaction score,subjective perception score,and the occurrence of complications.Results After one week of den-ture wearing,the average number of tenderness points in the oral mucosa of group A was 0.61±0.13,which was signifi-cantly lower than 2.23±0.21 in group B;the absorbance value of group A was 0.61±0.05,which was significantly higher than 0.43±0.03 of group B,with statistically significant differences(P<0.05).After one week of denture wearing,the re-tention,suitability,and stability of group A were 55.81%,53.49%,and 58.14%,which were significantly higher than 30.23%,27.91%,and 32.56%of group B(P<0.05).After one month of denture wearing,the subjective perception score and satisfaction score of group A were(28.07±2.75)points and(14.66±3.21)points,which were significantly higher than(16.55±0.44)points and(6.68±1.32)points of group B,with statistically significant differences(P<0.05).After one month of denture wearing,the incidence of complications in group A(6.98%)was significantly lower than that in group B(23.26%),with a statistically significant difference(P<0.05).Conclusion SLM 3D printing technology in the produc-tion of removable partial denture brackets has good application effect.Compared with traditional lost wax casting tech-nology,it results in smaller deviation,higher accuracy,higher comfort and satisfaction,which is worth promoting and ap-plying in clinical practice.