Introduction: Dental caries is considered the most common chronic disease affecting children globally, management of carious primary molars has evolved and a shift has occurred from the early conventional approaches where carious tissue was completely removed to the more recent biologic/ minimally invasive approaches that require less caries removal or no caries removal; one of the recent approaches is the Hall technique. Objectives: Compare the clinical and radiographic success of the stainless steel crowns (SSCs) placed by the Hall technique (HT) to the conventional method in restoring carious primary molars across one year. Materials and Methods: Parallel randomized controlled trial, participants were allocated in the Faculty of Dentistry, Alexandria university, Egypt. One hundred and four primary molars in four- to eight -year-old children were randomly divided into two treatment groups. Teeth were assessed at one week, one, six and 12 months for clinical success using standardized criteria showing either success, minor or major failure and at six and 12 months for radiographic evaluation. Success/failure rates were compared using chi square test. McNemar's test was applied in testing changes within each group. Results: No significant differences clinically or radiographically between the two groups at all follow ups periods. The HT group and the conventional groups showed (94.2%) and (88.5%) success rates respectively. Failures in both groups were major failures. Conclusions: The Hall technique showed comparable results when compared to that of the conventional SSC restorations for treatment of carious primary molar teeth that were not pulpally involved.