ABSTRACT Purpose To analyze the investments of the Unified Health System in Brazil destined to vocology. Methods Ecological, quantitative study with public, secondary data, available on the DataSUS/TABNet digital platform. The data refer to the quantity and values of the vocology procedures, presented and approved during the period from 2008 to 2021 in Brazil. After data collection and descriptive analysis, absolute and relative values, growth rates and deficit were adopted. Results In the analyzed period, 4,6 million procedures were carried out at a total cost of R$18,350 million. Of these, 2,4 million procedures were approved to be paid by state and municipal health departments at a total cost of R$10,617 million to public coffers. These transferred values represented a growth rate in investments destined to vocology procedures of up to 491%, if compared to 2008, however, a financial deficit rate of up to 360% was accumulated throughout the studied period. Conclusion It was verified that the public investments destined to vocology had a significant growth in all the indices analyzed, despite not having been passed on the totality of the values referring to the procedures carried out.

RESUMO Objetivo Analisar os investimentos do Sistema Único de Saúde do Brasil destinados à vocologia. Métodos Estudo ecológico, de caráter quantitativo com dados públicos, secundários, disponibilizados na plataforma digital DataSUS/TABNet. Os dados referem-se à quantidade e aos valores dos procedimentos da vocologia, apresentados e aprovados durante o período de 2008 a 2022 no Brasil. Após a coleta e análise descritiva dos dados, foram adotados os valores absolutos, relativos, taxas de crescimento e déficit. Resultados No período analisado foram realizados 4.6 milhões de procedimentos realizados a um custo total de R$18.350 milhões. Destes, 2.4 milhões de procedimentos foram aprovados a receberem o pagamento pelas secretarias de saúde dos estados e municípios a um custo total de R$ 10.617 milhões aos cofres públicos. Estes valores repassados representaram uma taxa de crescimento nos investimentos destinados aos procedimentos da vocologia em até 491%, se comparado ao ano de 2008, porém acumulou-se uma taxa de déficit financeiro de até 360% em todo o período estudado. Conclusão Constatou-se que os investimentos públicos destinados à vocologia passaram por crescimento significativo em todos os índices analisados, apesar de não terem sido repassados a totalidade dos valores referentes aos procedimentos realizados.

Abstract Purpose: To analyze, histomorphologically, the influence of the geometry of nanostructured hydroxyapatite and alginate (HAn/Alg) composites in the initial phase of the bone repair. Methods: Fifteen rats were distributed to three groups: MiHA - bone defect filled with HAn/Alg microspheres; GrHA - bone defect filled with HAn/Alg granules; and DV - empty bone defect; evaluated after 15 days postoperatively. The experimental surgical model was the critical bone defect, ≅8.5 mm, in rat calvaria. After euthanasia the specimens were embedded in paraffin and stained with hematoxylin and eosin, picrosirius and Masson-Goldner’s trichrome. Results: The histomorphologic analysis showed, in the MiHA, deposition of osteoid matrix within some microspheres and circumjacent to the others, near the bone edges. In GrHA, the deposition of this matrix was scarce inside and adjacent to the granules. In these two groups, chronic granulomatous inflammation was noted, more evident in GrHA. In the DV, it was observed bone neoformation restricted to the bone edges and formation of connective tissue with reduced thickness in relation to the bone edges, throughout the defect. Conclusion: The geometry of the biomaterials was determinant in the tissue response, since the microspheres showed more favorable to the bone regeneration in relation to the granules.

ABSTRACT Objective: This study aimed to evaluate bone repair in rat dental sockets after implanting nanostructured carbonated hydroxyapatite/sodium alginate (CHA) and nanostructured carbonated hydroxyapatite/sodium alginate containing 5% strontium microspheres (SrCHA) as bone substitute materials. Methods: Twenty male Wistar rats were randomly divided into two experimental groups: CHA and SrCHA (n=5/period/group). After one and 6 weeks of extraction of the right maxillary central incisor and biomaterial implantation, 5 μm bone blocks were obtained for histomorphometric evaluation. The parameters evaluated were remaining biomaterial, loose connective tissue and newly formed bone in a standard area. Statistical analysis was performed by Mann-Withney and and Wilcoxon tests at 95% level of significance. Results: The histomorphometric results showed that the microspheres showed similar fragmentation and bio-absorbation (p>0.05). We observed the formation of new bones in both groups during the same experimental periods; however, the new bone formation differed significantly between the weeks 1 and 6 (p=0.0039) in both groups. Conclusion: The CHA and SrCHA biomaterials were biocompatible, osteoconductive and bioabsorbable, indicating their great potential for clinical use as bone substitutes.

ABSTRACT Objective: Based on a literature review and on our own experience, this study proposes sheep as an experimental model to evaluate the bioactive capacity of bone substitute biomaterials, dental implant systems and orthopedics devices. The literature review covered relevant databases available on the Internet from 1990 until to date, and was supplemented by our own experience. Methods: For its resemblance in size and weight to humans, sheep are quite suitable for use as an experimental model. However, information about their utility as an experimental model is limited. The different stages involving sheep experiments were discussed, including the care during breeding and maintenance of the animals obtaining specimens for laboratory processing, and highlighting the unnecessary euthanasia of animals at the end of study, in accordance to the guidelines of the 3Rs Program. Results: All experiments have been completed without any complications regarding the animals and allowed us to evaluate hypotheses and explain their mechanisms. Conclusion: The sheep is an excellent animal model for evaluation of biomaterial for bone regeneration and dental implant osseointegration. From an ethical point of view, one sheep allows for up to 12 implants per animal, permitting to keep them alive at the end of the experiments. Level of Evidence II, Retrospective Study.