ABSTRACT
Abstract The search for treatments that accelerate the healing of lesions is of constant interest. Matricaria recutita (chamomile) is a plant with antimicrobial, anti-inflammatory, and healing properties, and antimicrobial Photodynamic Therapy (aPDT) eradicates microorganisms, which favors tissue repair. Objective This study aimed to evaluate the effect of the topical use of chamomile with or without aPDT on tissue repair in rats' tongues. Methodology A total of 75 male Wistar rats underwent standardized ulceration on the dorsum of the tongue using a punch of 5 mm diameter and were randomly allocated into the following groups: control (G1), chamomile fluid extract (G2), chamomile infusion (G3), aPDT (G4), and chamomile infusion + aPDT (G5). On the 3rd, 7th, and 14th days postoperatively, euthanasia was performed, and the ulcers were measured using calipers. The presence of edema, inflammatory infiltrate, cellularity, re-epithelialization, and characterization of total collagen were evaluated using sections stained with Hematoxylin and Eosin and Red Sirius. Histomorphometry analyses of the percentage of total collagen, the distance from the basal layer to the epithelial surface, and the thickness of the stratum corneum were performed. Descriptive (absolute/relative frequencies and modes) and exploratory analyses were performed. The associations between the groups and the presence of ulcers were analyzed with Fisher's exact test. All analyses were performed using the R program and statistical significance was set at p=0.05. Results The G2 positively modulated the exudative and proliferative phases of repair, both clinically (p<0.0001) and histologically, whether in descriptive or inferential analyses (p<0.05). The G3 showed a significant difference in clinical parameters compared with G1 (p<0.0001). The G4 and G5 did not positively modulate tissue repair. Conclusion The chamomile fluid extract showed better outcomes for tissue repair in the rat tongue.
ABSTRACT
ABSTRACT Objective: Civatte bodies are colloid bodies of apoptotic keratinocytes located at the dermoepidermal junction and are common in several dermatoses, including lichen planus lesions. The present study aimed to determine the presence of Civatte bodies in a sample of incisional biopsies obtained from patients diagnosed with oral lichen planus. Methods: A retrospective cross-sectional study, carried out with 34 slides stained with hematoxylin-eosin from the archive of an Oral Pathology Laboratory of a Higher Education Institution. The sample obtained was classified into white and red lesions from the available clinical data. Histological analyses were performed under a light microscope, with 10x and 40x objectives, identifying the presence or absence of Civatte bodies. Results: Colloid bodies were present in 73.5% the total sample studied and in 74.2% white lesions. Conclusion: The Civatte bodies were frequent in all samples analysed and should thus be considered a criterion for histological diagnosis in lesions of Oral Lichen Planus.
RESUMO Objetivo: Corpos de Civatte são corpos coloidais de queratinócitos apoptóticos localizados na junção dermoepidérmica e que são frequentes em várias dermatoses, inclusive as lesões de líquen plano. O objetivo do presente trabalho foi determinar a presença de corpos de Civatte em uma amostra de biópsias incisionais obtidas a partir de pacientes com diagnóstico de líquen plano oral (LPO). Métodos: Tratou-se de um estudo transversal retrospectivo, realizado com 34 casos cujas lâminas foram coradas pela hematoxilina-eosina, pertencentes ao arquivo de um Laboratório de Patologia Oral de Instituição de Ensino Superior. A amostra obtida foi classificada em lesões brancas e vermelhas a partir dos dados clínicos disponíveis. As análises histológicas foram realizadas em microscópio de luz, nas objetivas de 10x e 40x, com identificação dos corpos de Civatte como presentes ou ausentes. Resultados: Os corpos colóides estavam presentes em 73,5% da amostra total estudada e em 74,2% das lesões brancas. Conclusão: Os corpos de Civatte foram frequentes em todas as amostras analisadas e não devem ser negligenciados como critério de diagnóstico histopatológico em lesões de LPO.