الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Objective: 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 into 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 analyzed. Results: The success rate of Modified Hall and Hall techniques were (93.3%, 86.6% respectively), while conventional SSC was (100%). Minor failures rate in form of (pain and difficulty of eating) in Hall techniques were (10 %), while no teeth had minor failure in Modified Hall and Conventional techniques. High major failures rates in form of crown loss affected in (13.3) % of Hall technique and (6.6%) of Modified Hall technique, while no teeth were recorded in conventional SSCs had crown loss. On other hand, unfitted crown and crown perforation were (8.3, 6.6 respectively) of teeth treated with Hall technique. No significant difference was found between Hall, Modified Hall techniques and conventional SSCs. Intercuspation assessment disturbed in 28 cases treated with Hall and Modified Hall techniques. No changes in intercuspation recorded in control group. Additionally distortion, abrasion, and sever abrasion about to be perforated effected on crown occlusal surface of teeth treated with Hall technique were (75%, 25% respectively). (6.6% showed crown perforation and 18.4% had sever abrasion and about to be perforated),while no change of crown’s occluasal surface recorded in conventional and Modified Hall techniques. Conclusion: Both Hall and Modified Hall Techniques appear to be an effective treatment option for managing dental caries in primary teeth. The progress of dentinal caries can be significantly slowed, and arrested, beneath a well-sealed SSC restoration.Recommendation: Both Modified Hall and Hall techniques can be restored carious primary molars especially the uncooperative children. Both Modified Hall and Hall techniques can be used in rural area for treating carious primary molars. Hall technique should not be performed in young age children duo to distortion and perforation crown, but can be used in late mixed dentition.