Abstract: Abstract: Objective To compare the Carisolv minimally invasive treatment and conventional excavation in deep caries in primary deciduous molars, in order to guide the clinical treatment of the disease. Methods From April 2015 to April 2016, 132 children (218 teeth) with deep caries in primary deciduous molars were divided into 2 groups by random number table. 66 cases (110 teeth) in the observation group were treated with Carisolv minimally invasive treatment, while 66 cases (108 teeth) in the control group were treated with conventional excavation. Pain due to caries removal, dental treatment time, pulp vitality at 2 weeks after operation, and treatment related complications after 1 year were compared. Results The treatment time of each teeth in the observation group was (11.3±5.2)min, it is much longer than in the control group [(9.8±3.2)min, P＜0.05]. The pain during caries removal in the observation group was much lighter than in the control group (P＜0.05). After 1 year, the ratio of secondary caries, filler loosening and pulpitis in the observation group were 2.7%, 1.8% and 0%, these were much less than in the control group [16.7%, 9.3% and 6.5%, P＜0.05]. Conclusion Carisolv minimally invasive treatment of deep caries in primary deciduous molars may increase dental treatment time, but can significantly reduce intraoperative pain, reduce postoperative complications.

Key words: Chemo-mechanic caries removal, Carisolv, Minimally invasive, Primary molars, Deep caries