Objective: The restorative materials on tooth surfaces are predisposing factors for periodontal diseases due to an increase in plaque formation and inflammation of the adjacent gingiva. The attachment of dental plaque to dental restorations is more than that to the tooth surface as a result of specific characteristics of restorative materials like surface free energy inherent and surface roughness. The present study designed to assess the severity of periodontal diseases and gingival crevicular fluid (GCF) volume of the Saudi patients in pubertal stage who treated by some restorative dental materials. Subjects and Methods: This clinical study conducted on 120 patients aged between 15-21 years old. The study included three equal groups (40 patients each), 50% males and 50% females. The examined restoration types were: composite resin, amalgam and glass ionomer fillings. After six weeks of dental restorations, the following periodontal parameters: plaque index (PLI), gingival index (GI) and clinical attachment loss (CAL) in mm recorded for each restored tooth, then the gingival crevicular fluid (GCF) collected . Finally, the data analyzed by SPSS to evaluate the periodontal status. Results: The results of the present study revealed that there were differences in all periodontal parameters in the comparison between group I, II and III but without statistical significance differences except CAL (p ˂ 0.5), moreover, there were significant differences in GCF volume between group I, II and III.(p<0.05). Conclusion: After six weeks we concluded that there was a significant impact of composite resin, amalgam and glass ionomer fillings on the clinical parameters and GCF volume where we observed that the clinical parameters and GCF volume of amalgam restorations more higher than composite resin and glass ionomer fillings restorations.