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    Effects of casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) application on enamel microhardness after bleaching
    (Mosher & Linder, Inc, 2009) Bayrak, Sule; Sen Tunc, Emine; Sonmez, Isil Saroglu; Egilmez, Turkan; Ozmen, Bilal
    Purpose: To evaluate the effect of casein phosphopeptide-amorphous calcium phosphate (CCP-ACP) application on the microhardness of bleached enamel and compare it to that of fluoride application. Methods: 10 extracted bovine incisors were cut into four sections (4 x 4 x 3 mm) that were randomly distributed among five groups (n=8). All groups were bleached three times using 38% hydrogen peroxide (HP), with 5-day intervals between bleaching, according to the following treatment protocols: Group A: bleaching only; Group B: bleaching + daily CCP-ACP paste; Group C: bleaching + daily casein phosphopeptide-amorphous calcium fluoride phosphate (CPP-ACPF) paste; Group D: bleaching + daily 250ppm NaF solution; Group E: bleaching + APF gel (once after final bleaching). Specimens were maintained in artificial saliva throughout the experiment. Baseline and post-treatment Vickers microhardness values were obtained for all specimens. Statistical analysis was performed using one-way ANOVA and post-hoc Tukey tests. Results: Groups B and C showed significant increases in enamel microhardness following treatment (P< 0.001), whereas no statistically significant changes were observed in Groups A, D, or E (P> 0.05). One-way ANOVA of Delta Vickers microhardness numbers (Delta VHN) revealed significant differences among groups (P< 0.001), with Group B showing the highest Delta VHN and Group A the lowest. (Am J Dent 2009;22:393-396).
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    The evaluation of bond strength of a composite and a compomer to white mineral trioxide aggregate with two different bonding systems
    (Elsevier Science Inc, 2008) Sen Tunc, Emine; Sonmez, Isil Sarogulu; Bayrak, Sule; Egilmez, Tuerkan
    The purpose of this study was to evaluate the bond strength of a resin composite and a polyacid modified composite or "compomer" to white mineral trioxide aggregate (WMTA) with two different bonding systems (total-etch one bottle and self-etch one step). Forty specimens of WMTA were prepared and divided into four groups. In group one, Single Bond QM/ESPE, St Paul, MN) and Z250 (3M/ESPE) were placed over WMTA. In group two, Prompt L-Pop (3M Dental Products, St Paul, MN) and Z250 were applied. In group three, Single Bond was applied with Dyract AP (Dentsply DeTrey, Konstanz, Germany), and, in group four, Prompt L-Pop was applied with Dyract AP. The shear bond strength was measured, and the fractured surfaces were examined. The results of the shear bond strength tests were analyzed by one-way analysis of variance test. The results of this study have suggested that the total-etch one-bottle adhesive system mediated a stronger bond to WMTA for both the resin composite and the compomer investigated. The placement of composite (Z250) and compomer materials (Dyract AP), used with total-etch one-bottle adhesive (Single Bond), over WMTA as final restoration may be appropriate.
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    Late term complications of intruded permanent incisors: 2 case reports
    (Mosby-Elsevier, 2008) Sonmez, Hayriye; Sonmez, Isil Saroglu; Sen Tunc, Emine
    This report describes 2 cases of intrusive luxation injuries of maxillary immature permanent central incisors. In both cases, intruded teeth were left for spontaneous reeruption. During periodic follow-ups for up to 2 years the teeth did not show any sign, clinically or radiographically, of pulp necrosis with apical periodontitis. However, in the first case tenderness to percussion and periapical radiolucency developed after 2.5 years and endodontic treatment was started. In the second case, the patient returned after 2 years 9 months with complaint and periapical radiolucency was observed radiographically. Endodontic therapy was performed. These late-term complications highlight the need for regular long-term follow-up in cases of intrusive luxation in permanent teeth.