O pensamento complexo da comunicação organizacional: sobre identidade, imagem-conceito e gestão de imagem da ciência e do SUS / The complex thinking of organizational communication: on identity, concept-image and image management of science and of SUS / El pensamiento complejo de la comunicación organizacional: sobre identidad, imagen-concepto e gestión de la imagen de la ciencia y del SUS

A vivência num caminho de empregado de 'chão de fábrica' de grande empresa a gestor de uma pequena empresa, junto às teorias de comunicação, contribuíram para as reflexões acadêmicas no campo da comunicação organizacional do cientista e professor Rudimar Baldissera. Em entrevista à Reciis, o professor mobiliza termos frequentemente associados à comunicação e às organizações, tais como imagem-conceito, identidade e públicos, e problematiza o prisma das decisões e dos objetivos da gestão em perspectiva da comunicação para a partilha, o diálogo, a ação/retroação e as perturbações geradas pelos diversos públicos que são constitutivos das organizações. Por meio de reflexões a partir do paradigma da complexidade, Baldissera discorre sobre o 'tecer' e 'retecer'da imagem das instituições de saúde, da ciência, das universidades públicas e do SUS, no contexto contemporâneo marcado pela emergência sanitária da covid-19. Destaca a comunicação organizacional como um campo consolidado na construção da crítica e do conhecimento na área da comunicação e informação. Rudimar Baldissera é professor associado do Departamento de Comunicação ­ Faculdade de Biblioteconomia e Comunicação (Fabico), e professor e pesquisador do PPGCOM/UFRGS

Along with communication theories, the experience acquired during the path from 'factory floor' employee to manager of a small business contributed to the academic reflections done by scientist and professor Rudimar Baldissera in the organizational communication field. In an interview to Reciis, the professor mobilizes terms frequently associated with communication and organizations, such as concept-image, identity and audience, and problematizes the prism of decisions and objectives of management in perspective of communication for sharing, dialogue, action/feedback and disturbances generated by the different publics that are constitutive of organizations. Through reflections from the paradigm of complexity, Baldissera discusses the 'weaving' and 'reweaving' of the image of health institutions, science, public universities and SUS, in the contemporary context marked by the health emergency of covid-19. He highlights organizational communication as a consolidated field in the construction of criticism and knowledge in communication and information field. Rudimar Baldissera is an associate professor at the Department of Communication ­ Faculty of Library Science and Communication (Fabico), and professor and researcher at PPGCOM/UFRGS

La experiencia en un camino de empleado en el 'piso de fábrica' de una gran empresa a gerente de una pequeña, junto con las teorías de la comunicación, contribuyó a las reflexiones académicas en el campo de la comunicación organizacional del científico y profesor Rudimar Baldissera. En entrevista con Reciis, el profesor moviliza términos frecuentemente asociados con la comunicación y las organizaciones, como ima-gen-concepto, identidad y públicos, y problematiza el prisma de las decisiones y objetivos de la gestión en la perspectiva de la comunicación para compartir, el diálogo, la acción/retroalimentación y las perturbaciones generadas por los diversos públicos que son constitutivos de las organizaciones. A través de reflexiones desde el paradigma de la complejidad, Baldissera discute el 'tejer' y 'retejer' de la imagen de las institucio-nes de salud, la ciencia, las universidades públicas y el SUS, en el contexto contemporáneo marcado por la emergencia sanitaria de la covid-19. Destaca la comunicación organizacional como un campo consolidado en la construcción de la crítica y el conocimiento en el campo de la comunicación y información. Rudimar Baldissera es profesor asociado del Departamento de Comunicación de la Facultad de Biblioteconomía y Comunicación (Fabico) y docente e investigador del PPGCOM/UFRGS

Effect of hydrogen peroxide on color and whiteness of resin-based composites.

OBJECTIVE: To evaluate the influence of a 35% hydrogen peroxide gel on color and whiteness changes of resin-based composites (RBC). MATERIALS AND METHODS: Discs (n = 10; shade A3.5 enamel; and 8 mm diameter and 2 mm thick) were fabricated from three RBC (DF- Durafill, Heraeus Kulzer; ED- IPS Empress Direct, Ivoclar Vivadent; and AP- Amelogen Plus, Ultradent Products). Three subgroups were obtained for each RBC: before bleaching (T0 ) and after first (T1 ) and second (T2 ) bleaching applications. A dental spectrophotometer (VITA Easyshade, Vita Zahnfabrik) was used to obtain CIELAB color coordinates and whiteness index for dentistry (WID ) in all periods. CIELAB ( ΔEab* ) and CIEDE2000 (ΔE00 ) color differences were also obtained. Perceptibility (PT) and acceptability (AT) thresholds were used to analyze values of ΔEab* , ΔE00 , and ΔWID . Two-way analysis of variance (ANOVA; for L*, a*, b*, and WID ) and one-way ANOVA and Tukey tests (for ΔEab* and ΔE00 ) were used to analyzed the results (α = 0.05). RESULTS: L* and WID values from all RBC did not change after bleaching applications (T1 and T2 ) (P > .05). There were no significant differences in color differences ( ΔEab* and ΔE00 ) among all RBC evaluated after bleaching applications (T1 -T0 and T2 -T0 ; P > .05). Regardless of the RBC, mean values of ΔE00 between all different periods were always below 50%:50% PT value. CONCLUSIONS: The 35% hydrogen peroxide bleaching gel influences on color and whiteness of resin-based composites. However, color changes were not clinically perceived and whiteness variations were clinically acceptable. CLINICAL SIGNIFICANCE: Patients should be advised that existing composite restorations might not match the natural tooth color after bleaching, and their replacement may be required.

Fusion of permanent teeth as post-traumatic sequelae of trauma in primary dentition: A case report with fifteen years of follow-up.

Traumatic dental injuries in primary dentition present risk of sequelae in the permanent dentition. In this case report, we describe the management and long term follow-up of sequelae affecting permanent central incisor due to prior intrusive luxation and subluxation of the corresponding primary tooth. A 5-year-boy was referred for treatment, with history of fall by the age of 21 months, which caused subluxation of the primary maxillary right and left central incisors, and intrusion of the maxillary right lateral incisor. Radiographic and clinical monitoring was regularly performed. Hypoplasia and crown dilaceration of the permanent maxillary right central incisor was detected, as well as an enamel bridge between the central and lateral right incisors was diagnosed by cone bean tomography. Gingevectomy followed by the breaking of the enamel junction between the crowns of lateral and central incisors and indirect facet in composite resin were used to treat the sequelae. A precise diagnosis, involving a multidisciplinary team, contributed to the success of treatment. Key words:Case reports, follow-up studies, pediatric dentistry, tooth, deciduos, complications.

Natural Crown Bonding of Anterior Fractured Teeth at Different Levels of Complexity: A 14-Month Follow-up.

Dental fractures comprise the most frequent form of traumatic dental injury and often require an immediate procedure for their treatment. The repositioning of fractured crown fragments using the bonding fragment technique offers several advantages, including the reestablishment of function, esthetics, shape, shine, and surface texture, in addition to the maintenance of the original contour and alignment of the teeth. The aim of this article is to describe a therapeutic approach used with a patient who suffered varying degrees of crown fractures in three teeth that were treated with adhesive fragment reattachment. The natural crown bonding technique, using tooth fragments and a direct composite resin, successfully restored all of the fractured anterior teeth. The clinical examinations showed good esthetics and periodontal health after a 14-month follow-up, proving that the technique is a good option for tooth fractures.

Reestablishing the Function and Esthetics in Traumatized Permanent Teeth with Large Apical Lesion.

Dental trauma is a challenge for dental integrity and can lead to pulp necrosis. The clinical case reports the diagnosis of a maxillary right central incisor traumatized and its multidisciplinary treatment. Calcium hydroxide material was used to perform the processing apexification. An apical surgery was carried out to remove the apical periodontitis and to return the aesthetics to the patient; internal and external tooth whitening in maxillary right central incisor was performed. We conclude that surgery associated with the root filling in the central incisor led to a successful completion. Moreover, it is of utmost importance to demonstrate the interaction between the various areas of dentistry.

Anterior composite restorations in clinical practice: findings from a survey with general dental practitioners

Objectives: The aim of this study was to assess technical preferences of general dental practitioners when restoring anterior composite restorations. How the level of clinical experience or post-graduate training infuenced their options was also tested. Material and Methods: A cross-sectional study was performed using a questionnaire with general dental practitioners (GDPs) (n=276) in Southern Brazil. Information regarding post graduation training (specialization, master's or PhD degree) and linical experience (years since completing graduation) were gathered. The options regarding anterior composite restorations (type of composite, adhesive system, light curing unit, polishing procedures and rubber dam use) were collected. Data were submitted to descriptive analysis and associations were tested. Results: Response rate was 68% (187). GDPs selected microhybrid composite (52%) and 2-step total etch adhesive system (77%). LED was the preferred method of activation for 72.8%. Immediate polishing was preferred by 75%, using a combination of techniques. Most of the respondents (74.3%) did not use rubber dam. More experienced clinicians used more halogen lights (p<0.022), performed more light monitoring (p<0.001) and were resistant to use rubber dam (p<0.012). Dentists with post-graduation training used 3-etch-and-rinse system more frequently (p<0.04), usually monitored light intensity (p<0.014) and placed rubber dam more frequently (p<0.044). Conclusions: Hybrid composite, simplifed adhesives, LED units and immediate polishing were preferred by Southern Brazilian dentists for anterior composite restorations. Few dentists used rubber dam to perform composite restorations in anterior teeth. Clinical experience and post-graduation training infuenced the dentists' choices. .

Are there universal restorative composites for anterior and posterior teeth?

OBJECTIVE: This retrospective, longitudinal clinical study investigated the longevity up to 20 years of posterior restorations placed with 3 universal composites (Charisma, Herculite XR, Z100) and of anterior restorations placed with 2 universal composites (Charisma, Herculite XR). METHODS: Records from 90 patients were retrieved from a private practice (374 posterior, 219 anterior restorations). Clinical evaluation was performed by the FDI criteria. Survival analysis was assessed using Kaplan-Meier method and Log-Rank test, and factors associated with failure by multivariate Cox regression with shared frailty. RESULTS: In the first 10 years, almost 95% of the restorations were satisfactory, showing increased failure thereafter. Charisma showed the most failures in anterior and posterior areas. Annual failure rates varied between 0.3% and 2.5%, with slightly better performance for anterior restorations. Fracture (posterior) and aesthetics (anterior) were the main reasons for failure. CLINICAL SIGNIFICANCE: Differences were observed between restorative materials with different properties, but these became apparent only after more than 10 years of clinical service. The present study provides evidence that in a patient group with low caries risk, anterior and posterior restorations placed with universal composites may have excellent long-term clinical performance.

Anterior composite restorations in clinical practice: findings from a survey with general dental practitioners.

OBJECTIVES: The aim of this study was to assess technical preferences of general dental practitioners when restoring anterior composite restorations. How the level of clinical experience or post-graduate training infuenced their options was also tested. MATERIAL AND METHODS: A cross-sectional study was performed using a questionnaire with general dental practitioners (GDPs) (n=276) in Southern Brazil. Information regarding post graduation training (specialization, master's or PhD degree) and linical experience (years since completing graduation) were gathered. The options regarding anterior composite restorations (type of composite, adhesive system, light curing unit, polishing procedures and rubber dam use) were collected. Data were submitted to descriptive analysis and associations were tested. RESULTS: Response rate was 68% (187). GDPs selected microhybrid composite (52%) and 2-step total etch adhesive system (77%). LED was the preferred method of activation for 72.8%. Immediate polishing was preferred by 75%, using a combination of techniques. Most of the respondents (74.3%) did not use rubber dam. More experienced clinicians used more halogen lights (p<0.022), performed more light monitoring (p<0.001) and were resistant to use rubber dam (p<0.012). Dentists with post-graduation training used 3-etch-and-rinse system more frequently (p<0.04), usually monitored light intensity (p<0.014) and placed rubber dam more frequently (p<0.044). CONCLUSIONS: Hybrid composite, simplifed adhesives, LED units and immediate polishing were preferred by Southern Brazilian dentists for anterior composite restorations. Few dentists used rubber dam to perform composite restorations in anterior teeth. Clinical experience and post-graduation training infuenced the dentists' choices.

Fechamento de diastema entre incisivos centrais permanentes com tratamento ortodôntico associado à restauração adesiva / Central incisors diastema closure using orthodontic treatment associated with ashesive restoration

O fechamento de diastema tem sido um procedimento desafiador na clínica ortodôntica, uma vez que requer habilidades, tais como a percepção visual do problema e planejamento. Nesse sentido, este trabalho tem como objetivo descrever, mediante um caso clínico, o fechamento de diastema através de procedimento ortodôntico, finalizando com utilização de restauração adesiva direta.

Direct composite veneer to treat primary teeth with sequela of dental trauma: a case report / Faceta direta de resina composta para tratamento de dente decíduo com sequela de traumatismo dentário: relato de caso

Introduction: Tooth discoloration can be one of the main reasons for parents to seek treatment after dental trauma. When this sequela occurs with no other clinical or radiographic symptoms, a conservative approach is recommended. However, when such alterations can compromise the patient's esthetics and his/her interaction in a social environment, an esthetic treatment may be required. Case report: Here we report the esthetic rehabilitation of a primary maxillary left central incisor presenting coronal darkening in a 5-year-old girl that had been monitored clinically and radiographically due to dental trauma in the maxillary anterior teeth since she was 1 year old. Because of the esthetic complaint, a direct composite resin veneer was performed. Final considerations: After the treatment, a good esthetic result was achieved making the patient and her parents pleased. The esthetic improvement was maintained at the six-month follow-up with no negative impact on the child's social life.

Reabilitação estética em dentes anteriores com lesões de cárie proximais: relato de caso / Esthetic rehabilitation in anterior teeth with proximal carious lesions: case report

O objetivo do presente trabalho é o de descrever um caso de reabilitação estética na região dentária anterior. Paciente queixando-se das manchas escuras nos dentes anteriores superiores apresentava lesões de cárie nos dentes ântero-superiores, causando uma desarmonia estética no seu sorriso. Dentro do plano de tratamento reabilitador da paciente, realizaram-se restaurações classe III dos elementos dentários 11 e 12, classe IV do 21 e classe V do 13 e do 14. Frente ao caso clínico exposto, conclui-se que a reabilitação restauradora, além de promover saúde, pode proporcionar uma aparência estética mais favorável do sorriso, elevando a autoestima do paciente.

The aim of this study is to describe a case of esthetic rehabilitation in the maxillary incisive. Patient complaining of black stain on the maxillary teeth had carious lesions in teeth that cause great disharmony of your smile. Within the rehabilitation plan of patient, took place Class III restorations of the teeth 11 and 12, class IV of 21 and class V of the 13 and 14. It was concluded that, the present approach, allowed the anterior restorative rehabilitation, promote health and provide a more favorable aesthetic appearance of the smile, raising self-esteem of the patient.

Radiographic view of adhesive layer andrelationship with marginal leakage in class II composite resin restorations

This study assessed the influence of the application of bonding agents prior to or after matrix and wedge placement in the radiographic view of the adhesive layer in cervical walls of Class II composite resin restorations and correlated the findings with marginal leakage. Standard cavities were prepared in the mesial and distal faces of human molars, with cervical margins placed in dentin/cementum. Restorations were made using metallic matrix bands and wooden wedges. The microhybrid composite Filtek Z250 (3M ESPE) and two adhesive systems – Single Bond 2 (SB-3M ESPE) and Scotchbond Multi-Purpose (SMP-3M ESPE) – were used, thus defining five groups (n= 12): [SB1] and [SMP1]- matrix and wedge placed after bonding application; [SB2] and [SMP2]-matrix and wedge placed prior to bonding application; [Control] – restorations without adhesive system. Bitewing radiographs from each tooth were obtained and the view or not of the adhesive layer in the cervical wall of each restoration was observed under magnification (40x). Specimens were thermalcycled and dye penetration (0.5% basic fuchsine) evaluated under magnification (40x). Data were submitted to Kruskal-Wallis and Spearman correlation tests (p=0.05). The placement of matrix and wedge before bonding agent application increased the view of the adhesive layer only for SB (p<0.001). Matrix did not influence marginal leakage, and no significant relationship between radiographic view of adhesive layerand marginal leakage (r=-0.020; p =0.877) could be observed. In conclusion, SB presented better sealingability than SMP (p<0.01).

Infiltração marginal em restaurações de resina composta com diferentes materiais adesivos intermedißrios / Marginal leakage in resin composite restorations lined with different adhesive materials

Este estudo avaliou a capacidade de selamento de restaurações de resina composta com diferentes materiais adesivos intermedißrios. Cavidades Classe V padronizadas, com margens em esmalte e dentina/cemento, foram confeccionadas em incisivos bovinos. A resina de alto escoamento Fill Magic (Vigodent) e o cimento ionomérico Vitremer (3M ESPE) foram empregados como intermedißrios de restaurações com os compósitos Charisma e Solitaire (Heraeus Kulzer), formando 6 grupos (n = 14): [C1] - compósito microhíbrido Charisma; [C2] - Fill Magic + Charisma; [C3] - Vitremer + Charisma; [S1] - compósito condensßvel Solitaire; [S2] - Fill magic + Solitaire; [S3] - Vitremer + Solitaire. Após acabamento e polimento, as amostras foram armazenadas em solução fisiológica a 37ºC, por 30 dias, e então imersas em solução de fucsina bßsica a 0,5% por 24h. Os dentes foram longitudinalmente seccionados e a penetração do corante avaliada sob magnificância (40×), por dois examinadores, com escores padronizados. Os dados foram submetidos ao teste estatístico não-paramétrico de Kruskal-Wallis. Nas margens em esmalte, diferenças significativas foram verificadas apenas para a associação de intermedißrios à resina Solitaire, com os grupos S2 (p < 0,05) e S3 (p < 0,001) apresentando escores de infiltração significativamente maiores em relação aos demais. As margens em dentina/cemento apresentaram maior penetração em relação às margens em esmalte (p < 0,001). Apenas a associação do Vitremer às duas resinas melhorou o selamento deste substrato, com os grupos C3 (p < 0,001) e S3 (p < 0,05) apresentando os menores escores de infiltração.

Avaliaçäo clínica de restauraçöes de resina composta e amálgama em dentes posteriores - 5 anos / The clinical evaluete of the composite resins and amalgam restorations in molars and premolars

Noventa e seis restauraçöes de Classe I e II foram realizadas em 26 pacientes, com três materiais diferentes: amálgama, resina composta P50 e Herculite. Em cada paciente foram colocados os três materiais. Todas as restauraçöes após acabamento e polimento eram moldadas com optosil + xantopren, construídos modelos em gesso especial, para posteriores avaliaçöes comparativas. Decorridos cinco anos, os pacientes foram rechamados e um total de 63 restauraçöes foram moldadas. A ordenaçäo foi feita em cinco grupos, de acordo com as falhas apresentadas, e a análise estatística demonstrou näo haver ocorrido diferenças entre os materiais no tempo avaliado

Avaliação clínica de 5 anos das resinas compostas em dentes posteriores / Five year clinical evaluation of composite resins on posterior teeth

A proposta do presente estudo foi avaliar o comportamento de diferentes tipos de resinas compostas em cavidade de Classe I e II, em dentes posteriores, em "vivo". Cento e vinte e seis restaurações foram executadas, em cada paciente foram colocados os 3 materiais e após a colocação de rodas as restaurações, elas foram moldadas com optisil + xantopren, confeccionados modelos de gesso, "baseline", os quais seriam confrontados com as avaliações posteriores, ou seja de 4 a 5 anos. Na avaliação de 5 anos foram avaliadas 86 restaurações, as quais foram classificadas de acordo com um ranking de "qualidade" e após os resultados foram submetidos a análise estatística. Os resultados demonstraram ter ocorrido diferenças entre os materiais avaliados no que tange a forma anatômica

Restauraöes de resina composta em dentes posteriores com reforço oclusal / The restoration at the composite resins in posterior teeth with reforced oclusal

As restauraçöes de resina composta säo hoje uma realidade. Inúmeras pesquisas tem demonstrado um significativo aumento na qualidade de restauraçöes de resina composta, em funçäo, principalmente do aumento da qualidade de carga orgânica e da distribuiçäo homogênea destas partículas na massa restauradora. A resistência ao desgaste e a harmonia de cor, säo razöes que justificam o crescente uso de materias estéticos em dentes posteriores. Mesmo que se reconheça que o desgaste oclusal só se manifestará em torno de 6 anos esta capacidade pode ser aumentada-se a área de contato oclusal for reforçada. Este trabalho mostra a possibilidade de se criar reforços oclusais com esmalte de dente natural, as chamadas "ilhas" ou se confeccionar restauraçöes de amálgama nos contatos