RESUMO Propõe-se no artigo observar o papel dos cantos africano-diaspóricos no trabalho de Jerzy Grotowski e no âmbito das pesquisas continuadas no Workcenter of Jerzy Grotowski and Thomas Richards. Reflete-se sobre os cantos a partir de suas potências epistemológicas e políticas e como elementos fundamentais para uma discursividade étnico-racial nos estudos sobre essa importante obra no campo das artes performativas. A noção de cantos de experiências negras propõe a compreensão do termo cantos de tradição, central na obra grotowskiana, como meios de comunicação de vivências diaspóricas e afrodescendentes, contrária ao uso unicamente instrumental e acrítico dessas tecnologias performativas.

ABSTRACT It is proposed in the paper to observe the role of African-diasporic songs in the work of Jerzy Grotowski and in the context of continued research at the Workcenter of Jerzy Grotowski and Thomas Richards. We reflect on the songs from their epistemological and political potencies and as fundamental elements for an ethnic-racial discursivity in studies of this important work in the field of performing arts. The notion of songs of black experiences proposes the understanding of the term tradition songs, central in Grotowski’s work, as means of communication of diasporic and Afro-descendant experiences, contrary to the solely instrumental and uncritical use of these performative technologies.

RÉSUMÉ Il est propose dans l’article d’observer le rôle des chants afro-diasporiques dans le travail de Jerzy Grotowski et dans le cadre des recherches poursuivies au Workcenter de Jerzy Grotowski et Thomas Richards. Nous réfléchissons sur les chansons à partir de leurs puissances épistémologiques et politiques et en tant qu’éléments fondamentaux pour une discursivité ethnique-raciale dans les études de cette importante œuvre dans le domaine des arts performants. La notion de chants d’expériences noires propose d’appréhender le terme chants de tradition, central dans l’œuvre de Grotowski, comme moyen de communication d’expériences diasporiques et afrodescendantes, contrairement à l’utilisation uniquement instrumentale et non critique de ces technologies performatives.

Abstract This study aimed to evaluate the role of photobiomodulation (PBM) in apexification and apexogenesis of necrotic rat molars with an open apex. Rat molars were exposed to the oral environment for 3 weeks. Canals were rinsed with 2.5% NaOCl and 17% EDTA, filled with antibiotic paste and sealed. After 7 days, canals were rinsed and divided into six groups (n=6): mineral trioxide aggregate (MTA); blood clot (BC); human dental pulp stem cells (hDPSC); MTA+PBM; BC+PBM; and hDPSC+PBM. In hDPSC groups, a 1% agarose gel scaffold was used. Two groups were not exposed: healthy tooth+PBM (n = 6), healthy tooth (n = 3); and one was exposed throughout the experiment: necrotic tooth (n = 3). In PBM groups, irradiation was performed with aluminum gallium indium phosphide (InGaAlP) diode laser for 30 days within 24-h intervals. After that, the specimens were processed for histological and immunohistochemical analyses. Necrotic tooth showed greater neutrophil infiltrate (p < 0.05). Necrotic tooth, healthy tooth, and healthy tooth+PBM groups showed absence of a thin layer of fibrous condensation in the periapical area. All the other groups stimulated the formation of a thicker layer of fibers (p < 0.05). All groups formed more mineralized tissue than necrotic tooth (p < 0.05). PBM associated with MTA, BC, or hDPSC formed more mineralized tissue (p < 0.05). MTA+PBM induced apexification (p < 0.05). Rabbit polyclonal anti-bone sialoprotein (BSP) antibody confirmed the histological findings of mineralized tissue formation, and hDPSC groups exhibited higher percentage of BSP-positive cells. It can be concluded that PBM improved apexification and favored apexogenesis in necrotic rat molars with an open apex.

Abstract The effectiveness of photobiomodulation (PBM) and manual therapy (MT), alone or combined (CT), were evaluated in pain intensity, mandibular movements, psychosocial aspects, and anxiety symptoms of temporomandibular disorder (TMD) patients. Fifty-one TMD patients were randomly assigned to three groups: the PBM group (n = 18), which received PBM with 808 nm, 100 mW, 13.3 J/cm2, and 4 J per point; the MT group (n=16) for 21 minutes each session on masticatory muscles and temporomandibular joint TMJ; and the CT group (n = 17), applied during twelve sessions. Seven evaluations were performed in different moments using visual analogue scale (VAS), Research Diagnosis Criteria for Temporomandibular Disorders (RDC/TMD) Axis I and II, and Beck anxiety inventory (BAI). All groups demonstrated reductions in pain and improvement in jaw movements during treatment and at follow-up (< 0.001). The assessment of psychosocial aspects of TMD, comparing baseline and follow-up in all treatment groups, revealed that treatment did not promote modification in the intensity of chronic pain (p > 0.05). However, depression symptoms showed a reduction in PBM and CT groups (p≤0.05). All treatments promoted reduction in physical symptoms with and without pain and enhancement of jaw disabilities (p ≤ 0.05). MT promotes improvement in 5 functions, PBM in 2, and CT in 1 (p < 0.001). BAI analysis revealed that all treatments lead to a reduction in anxiety symptoms (p≤0.05). All protocols tested were able to promote pain relief, improve mandibular function, and reduce the negative psychosocial aspects and levels of anxiety in TMD patients. However, the combination of PBM and MT did not promote an increase in the effectiveness of both therapies alone.