Objective: The purpose of this study is to evaluate the remineralization potential of the self-assembling peptideP11-4 (Curodont repair) versus highly concentrated fluo-

Purpose: This in vitro study was conducted to evaluate the remineralization effect of laser, Nanoseal®, and Zamzam water on initial enamel carious lesions of premolar induced around orthodontic brackets. Materials and Methods: A total of 40 premolars divided randomly into four groups were submitted to three phases: (1) placement of orthodontic brackets; (2) demineralizing solution; and (3) remineralization (Group L; teeth were irradiated with 980 nm diode laser for 30 s, Group N; Nanoseal® was applied to teeth according to manufacturer's instructions, Group Z; teeth were immersed in Zamzam water for 3 days then rinsed with deionized water, and Group C; control with no treatment). In each phase, elemental analysis (calcium and phosphorus) was measured using a scanning electron microscope/energy dispersive X-ray analysis. The data were tested using the Bonferroni test and Tukey's test. Results: There was a decrease in calcium ion content in Groups C and L in the third phase (−1.62% and − 0.1%, respectively) than the first one. On the other hand, an increase in calcium ion was shown in Groups Z and N (1.1 and 1.6%, respectively). An increase in phosphorus ion was obvious in all experimental groups ranging from 0.6% to 3.7%, with Group N having the highest increase of phosphorus ion from the first to the third phase. Conclusions: Using Nanoseal® and Zamzam water proved to be better than a diode laser for the treatment of initial carious lesions. The use of diode laser helps to remineralize enamel but in a lower percentage than other tested agents.

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Purpose: To evaluate clinically and radiographically the postoperative success of Propolis, Propolis mixed with Chitosan and Formocresol in pulpotomy procedure for primary molars. Materials and Methods: 30 Primary molars in 10 patients were selected according to the inclusion criteria. In this study pulpotomy was carried out on 30 molars and depending on the type of radicular pulp medicament, the molars were divided randomly and equally into three groups: Group I (formocresol group), Group II (Propolis and Chitosan mixture group) and Group III (Propolis group). Clinical follow up was done after 1, 3 and 6 months. Periapical radiographs also were taken at 1, 3 and 6 months follow up visits. Results: No statistically significant difference between groups in the overall cumulative clinical or radiographic success at follow up visits P value ≤. 0.05 Conclusion: Propolis mixed with Chitosan can be considered as a good natural alternative to formocresol in primary molars pulpotomy.