Selvaraj Sunantha, Jayachandran Dorairaj, Priya Shanmuga
Department of Prosthodontics and Crown & Bridge, Vinayaka Mission's Sankarachariyar Dental College, Vinayaka Mission's Research Foundation- Deemed to be University, Salem, Tamil Nadu, India.
MBBS Student, Saveetha Medical College and Hospital, Kuthambakkam, Tamil Nadu, India.
Indian J Dent Res. 2023 Jul-Sep;34(3):252-256. doi: 10.4103/ijdr.ijdr_73_23.
Irreversible hydrocolloid materials are widely used for both diagnostic and definitive impression procedures. Impressions can be disinfected by immersion or spraying in any compatible disinfectant. Disinfectants should not adversely affect the dimensional stability of the impression and physical properties of impression material and subsequent dental cast.
The study aims to evaluate the efficacy of a hypochlorous disinfectant solution mixed with irreversible hydrocolloid on setting time, antibacterial efficacy, and dimensional stability.
Three groups were made with one control group and three alginate impression was made for each participants in the maxillary arch with 24-hours intervals between one another using the same brand of commercially available chromatic alginate. The working and setting time were noted. Bacterial swabs were collected using a dry sterile cotton swab in the mid palatal region. Dental casts were made using type III gypsum.
The working and setting time had significant differences whereas the dimension among the cast has no significant difference. Microbial growth analysis had distinct differences among the groups.
The self disinfection method using a pioneer solution of hypochlorous HOCl (100 ppm) to mix the alginate impression material rather than the water with the same powder-liquid ratio prescribed by the manufacturer had the same dimensional stability with improved antimicrobial action.
不可逆水胶体材料广泛应用于诊断性和确定性印模程序。印模可通过浸入或喷洒在任何兼容的消毒剂中进行消毒。消毒剂不应负面影响印模的尺寸稳定性、印模材料的物理性能以及后续的牙科模型。
本研究旨在评估次氯消毒剂溶液与不可逆水胶体混合对凝固时间、抗菌效果和尺寸稳定性的影响。
分为三组，一组为对照组，为每位参与者在上颌弓制作三个藻酸盐印模，彼此间隔24小时，使用同一品牌的市售彩色藻酸盐。记录工作时间和凝固时间。使用干燥无菌棉签在上腭中部区域采集细菌拭子。使用III型石膏制作牙科模型。
工作时间和凝固时间有显著差异，而模型之间的尺寸无显著差异。各实验组之间的微生物生长分析有明显差异
使用次氯酸（HOCl，100 ppm）原液以制造商规定的相同粉液比与藻酸盐印模材料混合，而非与水混合的自消毒方法，具有相同尺寸稳定性且抗菌作用增强。
