Ibrahim H. El Kalla*, Hanaa S Mohammed**, Rusul A. H. AL -SARRAY*** * Professor of Pediatric Dentistry, Faculty of Dentistry, Mansoura University ** Assoc.Prof. Pediatric DentistryMansoura University *** B.D.S (2008) Baghdad University, Iraqi Abstract: Review: Hall technique is a novel method for managing carious primary molars using stainless steel crowns (SSCs) with no local anesthesia, caries removal or tooth preparation. This study aimed to compare clinically and radiographically the effectiveness of Modified Hall technique with conventional SSCs in primary teeth. Methods: Sixty healthy children between 4-7 years had carious primary molar teeth were  selected and divided in to three groups: group I (n=30 teeth) treated with conventional SSC (involving complete caries removal and tooth preparation before placement SSC), group II treated with Hall technique(involving no local anesthesia, caries removal or tooth preparation), and group III treated with Modified Hall technique (involving no local anesthesia, caries removal or tooth preparation just cuspal reduction not exceeding enamel layer; opening the closed contact area through the thin slice disc). Teeth were followed up at one week, 3, 6, 9 and 12 months clinically and radiographicaly. Data were statistically analysied.     Results: The success rate of Modified Hall and Hall techniques were (93.1%, 95% respectively), while conventional SSC was (83.3%). Minor failures rate in form of (pain and difficulty of eating) were equal in (conventional SSC and Hall techniques) (6.6 %), while high in Modified Hall technique was (16.6%). High major failures rates in form of crown loss affected in (6.6) % of Modified Hall technique, (5%) of Hall technique, while (16.6%) of SSCs, unfitted crown and crown perforation were (8.3, 3.3 respectively) of Hall technique.  No significant difference was found between Hall, Modified Hall techniques and conventional SSCs. On other hand, the most common reason of Hall technique problem was crowded effected on anterior teeth (11.6%), while (6.6%)Modified Hall. Additionally, the second common reason of the novel method problem was occluso vertical dimensions (OVD) disturbed in 9 cases treated with Hall and Modified Hall techniques. No changes in OVD recorded in control group. Conclusion:Both Modified Hall and Hall Techniques are suggested to be an effective treatment option for managing dental caries in primary teeth. Children treated with Hall and Modified Hall technique has not shown any signs of TMJ dysfunction. No pathological radiographical evidence was recorded in all groups.