Adhesion of a sealant with pre-reacted glass ionomer particles under salivary contamination: an in vitro study

Objective: this in vitro study compared the adhesive strengths of the resin sealant with the Giomer technology sealant under salivary contamination. Materials and Methods: fifty-two bovine incisors were randomly divided into four groups (n=13): GI, a resin sealant (Fluroshield®) without salivary contamination (control of GII); GII, Fluroshield sealant + salivary contamination; GIII, a Giomer technology sealant (BeautiSealant®) without salivary contamination (control of GIV); and GIV, BeautiSealant® sealant + salivary contamination. In the salivary contamination groups, artificial saliva was used through a pipette, and after 20 s, it was air-dried and the sealant was applied. Shear strength tests were performed using a universal testing machine. One-way ANOVA variance and Tukey's test were used for multiple comparisons. The fracture types were analyzed using a stereomicroscope with 40X magnification. Results: the means and standard deviations (SD) of adhesion for Fluroshield® and BeautiSealant® in the group without salivary contamination were 15.27 (±0.96) and 11.90 (±0.94), and for the group with salivary contamination, 13.14 (±1.03) and 8.95 (±1.33), respectively, indicating a statistically significant difference between GI and GII p=0.020, GIII and GIV p=0.041. Mixed failures were detected in GI (38%), GII (44%), GIII (38%), and GIV (62%). Conclusion: there was a statistically significant decrease in the adhesive strength values in the groups with salivary contamination for both the sealants studied. However, no significant difference was observed between the two sealants when the materials used were compared.

Objetivo: este estudo in vitro comparou as forças adesivas do selante resinoso com o selante da tecnologia Giomer sob contaminação salivar. Materiais e Métodos: cinquenta e dois incisivos bovinos foram divididos aleatoriamente em quatro grupos (n=13): GI, um selante resinoso (Fluroshield®) sem contaminação salivar (controle do GII); GII, selante Fluroshield + contaminação salivar; GIII, um selante com tecnologia Giomer (BeautiSealant®) sem contaminação salivar (controle do GIV); e GIV, selante BeautiSealant® + contaminação salivar. Nos grupos de contaminação salivar, a saliva artificial foi utilizada por meio de uma pipeta e, após 20 s, foi seca ao ar e aplicado o selante. Os testes de resistência ao cisalhamento foram realizados usando uma máquina de teste universal. A variância ANOVA de uma via e o teste de Tukey foram usados para comparações múltiplas. Os tipos de fratura foram analisados em estereomicroscópio com aumento de 40X. Resultados: as médias e desvios padrão (DP) de adesão para Fluroshield® e BeautiSealant® no grupo sem contaminação salivar foram 15,27 (±0,96) e 11,90 (±0,94), e após contaminação salivar foram 13,14 (±1,03) e 8,95 (±1,33), respectivamente, indicando haver diferença estatisticamente significante entre GI e GII p=0.020, GIII e GIV p=0.041. Falhas mistas foram detectadas em GI (38%), GII (44%), GIII (38%) e GIV (62%). Conclusão: houve diminuição estatisticamente significativa dos valores de resistência adesiva nos grupos com contaminação salivar para ambos os selantes estudados. No entanto, não foi observada diferença significativa entre os dois selantes quando comparados os materiais utilizados.

Preemptive analgesia with ibuprofen increases anesthetic efficacy in children with severe molar hypomineralization: a triple-blind randomized clinical trial

Abstract Molar incisor hypomineralization (MIH) is often accompanied by dental hypersensitivity and difficulty in achieving effective analgesia. Objective: This study evaluated the effectiveness of preemptive analgesia in children with severe MIH, post-eruptive enamel breakdown, and hypersensitivity. Methodology: Ibuprofen (10 mg/kg child weight) or placebo was administered, followed by infiltrative anesthesia and restoration with resin composite. Hypersensitivity was evaluated in five moments. The data were analyzed using the chi-square test, Fisher's exact test, and t-test. Results: Preemptive analgesia provided benefits for the treatment of severe cases of MIH, with an increase in the effectiveness of infiltrative anesthesia and improved patient comfort during the restorative procedure. Conclusion: Preemptive analgesia has shown efficacy in reducing hypersensitivity during restorative dental procedures, evidencing the significance of this study for patients with MIH and hypersensitivity.