Abstract Objective This study aimed to evaluate the inflammatory effect and bone formation in sterile surgical failures after implantation of a collagen sponge with mesenchymal stem cells from human dental pulp (hDPSCs) and Aloe vera. Material and Methods Rattus norvegicus (n=75) were divided into five experimental groups according to treatment: G1) control (blood clot); G2) Hemospon®; G3) Hemospon® in a culture medium enriched with 8% Aloe vera; G4) Hemospon® in a culture medium containing hDPSCs and G5) Hemospon® in a culture medium enriched with 8% Aloe vera and hDPSCs. On days 7, 15 and 30, the animals were euthanized, and the tibia was dissected for histological, immunohistochemistry and immunofluorescence analyses. The results were analyzed using nonparametric Kruskal-Wallis test and Dunn’s post-test. Results On days 7 and 15, the groups with Aloe vera had less average acute inflammatory infiltrate compared to the control group and the group with Hemospon® (p<0.05). No statistically significant difference was found between the groups regarding bone formation at the three experimental points in time. Osteopontin expression corroborated the intensity of bone formation. Fluorescence microscopy revealed positive labeling with Q-Tracker® in hDPSCs before transplantation and tissue repair. Conclusion The results suggest that the combination of Hemospon®, Aloe vera and hDPSCs is a form of clinical treatment for the repair of non-critical bone defects that reduces the inflammatory cascade’s effects.

Resumo Introdução O hidróxido de cálcio é considerado uma medicação intracanal padrão ouro e diferentes substâncias podem ser empregadas como veículo para melhorar suas propriedades. O Aloe vera é um fitoterápico popularmente conhecido por babosa e que se destaca pela sua capacidade imunorreguladora, antimicrobiana, cicatrizante e pela biocompatibilidade celular. Objetivo Avaliar a dissociação iônica do hidróxido de cálcio, tendo o Aloe vera como veículo. Material e método O extrato de Aloe vera foi obtido diretamente da folha, submetido à filtração e armazenado em tubo Falcon estéril. Foram preparados dois grupos de medicação intracanal: o grupo controle, com hidróxido de cálcio e soro fisiológico, e o grupo experimental, com hidróxido de cálcio e Aloe vera como veículo. Resultado Não foi verificada uma diferença estatisticamente significativa entre as médias de liberação de cálcio dos grupos (p=0,944). Quando comparados os valores de forma pareada, considerando as diferentes avaliações ao longo do tempo, foi identificada uma diferença estatisticamente significativa (p=0,015) para o grupo experimental, de modo que os valores médios da liberação de cálcio foram superiores até o 21º dia do estudo. Conclusão O hidróxido de cálcio, quando associado ao Aloe vera, apresentou maior dissociação iônica que quando utilizado com água destilada. Tal resultado, associado às propriedades inerentes deste fitoterápico, sugerem que a pasta de hidróxido de cálcio e Aloe vera pode ser uma alternativa viável e promissora como medicação intracanal, e melhorar o reparo apical e periapical.

Abstract Introduction Calcium hydroxide is considered an intracanal medication gold standard, and different substances can be employed as a vehicle to improve its properties. Aloe vera is a herbal remedy popularly known as babosa and is notable for its immunoregulatory, antimicrobial, healing and cellular biocompatibility. Objective To evaluate the ionic dissociation of calcium hydroxide, with the Aloe vera as vehicle. Material and method The extract of Aloe vera was obtained directly from the leaf, submitted to filtration and stored in a sterile falcon tube. Two groups of intracanal medication were prepared; the control group, with calcium hydroxide and saline; and the experimental group, with calcium hydroxide and Aloe vera as vehicle. Result There was no statistically significant difference between the means of calcium release from the groups (p = 0.944). When comparing the paired values, considering the different evaluations over time, a statistically significant difference (p = 0.015) was identified for the experimental group, so that mean values of calcium released were higher up to the 21st day of the study. Conclusion Calcium hydroxide, when associated with Aloe vera, presented higher ionic dissociation than when used with distilled water. This result, combined with the inherent properties of this herbal remedy, suggests that the paste of calcium hydroxide and Aloe vera can be a viable and promising alternative as intracanal medication and improve apical and periapical repair.