Masticatory performance, self-perception of oral health, oral health-related quality of life and nutritional status of completely edentulous elderly patients submitted to different rehabilitation treatments: A cross-sectional study.

BACKGROUND: The impact of treatments on completely edentulous individuals on masticatory performance (MP), oral health-related quality of life (OHRQoL), nutritional status (NS) and socio-economic profile (SP) is unclear in the literature. OBJECTIVE: To compare the MP, OHRQoL, NS and SP of totally edentulous elderly users of bimaxillary complete dentures (CD) and users of lower implant-supported fixed complete dentures (IFCD). METHODS: Forty participants were allocated into groups according to rehabilitation treatment (n = 20): bimaxillary CD (G1) and lower IFCD, and upper CD (G2). The evaluation of MP used almonds by the method of sieves. Four questionnaires (Geriatric Oral Health Assessment Index-GOHAI and Oral Health Impact Profile Edent-OHIP-Edent, Brazilian Economic Classification Criteria-ABEP and Mini Nutritional Assessment-MNA) were applied to assess the OHRQoL, SP and NS of the elderly, respectively. After evaluating the statistical assumptions, the Mann-Whitney (α = .05) test was applied to compare the groups regarding MP, OHRQoL, NS and SP. Spearman's correlation (α = .05) was performed to verify the correlation between the MP, the OHRQoL and the NS of the participants. RESULTS: G2 showed better MP (p < .05) in all masticatory cycles, OHRQoL (p < .05) and NS than the G1. However, the participants' self-perception of oral health did not differ between groups (p < .05). A moderate negative correlation was found between MP and OHRQoL for 40 masticatory cycles (r2 = -0.513; p = .001). CONCLUSION: Individuals rehabilitated with IFCD had a higher average monthly family income and achieved superior behaviour in MP and OHRQoL, in addition to lower risks of malnutrition when compared to individuals using bimaxillary CD.

Oral health self-perception, maximum bite force and masticatory efficiency in patients with overdentures with different attachment systems-A crossover study.

BACKGROUND: The literature is unclear about how the different attachment systems for overdentures impact the maximum bite force, the masticatory efficiency and how this impact in the oral health self-perception in patients. OBJECTIVE: To evaluate the effect of two attachment systems (O-ring and Locator) for mandibular overdenture using single implant on quality of life, maximum bite force (BF) and masticatory efficiency (ME). METHODS: Twenty-eight completely edentulous denture wearers with a mandibular symphysis implant were randomly selected and allocated into two groups in a crossover study, considering O-ring and Locator attachment types. The quality of life and self-perception of oral health were assessed using the Oral Health Impact Profile (OHIP-Edent) and Geriatric Index of Determination of Oral Health (GOHAI) questionnaires, respectively. BF was measured using a gnathodynamometer and ME by chewing silicone cubes and almonds in different numbers of cycles. RESULTS: There was no difference between the attachment systems about self-perceived oral health and impact on quality of life (p > .05). The O-ring-type system obtained a significantly higher BF than the locator-type system (p = .04). Regardless of the food chewed, no statistically significant difference was observed with the type of attachment (p > .05). The ME was directly proportional to the masticatory cycles only for almonds (p < .01). CONCLUSIONS: Locator and O-ring inserts had a similar impact on patients' quality of life, self-perception of oral health and ME. Additionally, the O-ring system exhibited superior properties in the BF.

Implant digital impression accuracy using extraoral scanners: a three-dimensional analysis

Aim: To analyze the accuracy of extraoral systems (Ceramill Map400+, AutoScan-DS200+, and E2) in full implantprosthetic rehabilitation three-dimensionally. Methods: A metallic edentulous maxilla with four implants was digitalized by a contact scanner (MDX-40 - Roland, control) and used as a control image to compare with other images generated by three laboratory scanners (10 samples per group). Letters identified all the four components: A and D angled 45º, and B and C parallel. The BioCAD software exported the images (.STL) to compare and verify deviations of the analogs on the X, Y, and Z axes. The nonparametric Kruskal-Wallis test and the two-way ANOVA on ranks with a post hoc Tukey test analyzed the data with 5% significance. Results: No statistical differences were observed in the accuracy between the extraoral scanners (p=0.0806). However, when analyzing only the components, component D was more accurate when scanned with Ceramill Map400+ compared with AutoScan DS200+ (p<0.001) and with E2 (p=0.002). Conclusions: All extraoral systems assessed showed digitalization accuracy but with more deviations in angled implants. The Ceramill Map400+ scanner showed the best results for the digital impression of a complete arch

Influence of filling materials on the fracture resistance of resin composite used for sealing screw access hole / Influência dos materiais de preenchimento na resistência a fratura das resinas compostas utilizadas para selamento do orifício de acesso ao parafuso

Introduction: Screw-retained restorations have a screw access hole (SAH) sealed with resin composite aiming at safe-guarding the aesthetic features of the ceramic veneer. The loss or wear of the resin composite applied in sealing the SAH is among the most common complications in implant prosthodontics, as the fracture of ceramic veneer. Objective: Evaluate the influence of sealant materials on the fracture resistance of resin composite applied in sealing screw access hole in screwed (SAH) implants. Material and method: The samples were produced from UCLA abutments in metallic NiCr alloy with subsequent application of ceramic. After asperisation and conditioning ceramic surface, was applied silane and dentin adhesive, before sealing the conduits with resin composites Z100 and P60. Nine groups (n=10) were evaluated: sealing with Z-100 (ZNC) and P-60 (PNC) without obturation of SAH; sealing with Z100 (ZCP) and P-60 (PCP) with absorbent cotton; Z100 (ZPT) and P60 (PPT) with polytetrafluoroethylene; Z100 (ZGP) and P60 (PGP) with gutta-percha and a cemented ceramic crown (ICS). After the fracture resistance test, the data were analyzed using two-way ANOVA and Tukey HSD tests (p<.05). Result: The fracture mode was evaluated by scanning electron microscope. Irrespective of the filling material, the highest mean values of fracture resistance were observed in the sealing with P60 (p=.002). When combined with resins composed of a sealing material, the results obtained were: ZGP: 805.5N/ PGP: 929.5N

Introdução: As próteses parafusadas possuem orifício de acesso ao parafuso (SAH), os quais são selados com resina composta. Sua perda ou desgaste está entre as complicações mais comuns em próteses sobre implantes, associadas a fratura da lâmina cerâmica. Objetivo: Assim, é importante avaliar a influência dos materiais de selamento na resistência à fratura de resina composta aplicada ao SAH no selamento de prótese sobre implantes parafusadas. Material e método: As amostras foram produzidas utilizando pilares UCLA em liga metálica de NiCr com posterior aplicação de cerâmica. Após asperização e condicionamento da superfície cerâmica, foram aplicados silano e adesivo dentinário, antes da selagem dos condutos com as resinas compostas Z100 e P60. Foram avaliados nove grupos (n = 10): selamento com Z-100 (ZNC) e P-60 (PNC) sem selamento do SAH; selamento com Z100 (ZCP) e P-60 (PCP) com algodão absorvente; Z100 (ZPT) e P60 (PPT) com politetrafluoroetileno; Z100 (ZGP) e P60 (PGP) com guta-percha e coroa de cerâmica cimentada (ICS). Após o teste de resistência à fratura, os dados foram analisados usando ANOVA de dois fatores e testes Tukey HSD (p<0,05). O tipo de fratura foi avaliado por microscópio eletrônico de varredura. Resultado Independentemente do material obturador, os maiores valores médios de resistência à fratura foram observados no selamento com P60 (p=0,002). Quando combinados com resinas compostas por um material de selamento, os resultados obtidos foram: ZGP: 805,5N/ PGP: 929,5N

Revascularização pulpar em dentes permanentes imaturos sem vitalidade pulpar: uma revisão integrativa / Pulp revascularization in immature permanent teeth without pulp vitality: an integrative review

Introdução: Dentes permanentes imaturos que evoluem para necrose pulpar representam um desafio para tratamento endodôntico. A endodontia regenerativa e técnicas de revascularização pulpar surgem como um campo dinâmico e potencialmente ideal para terapia clínica em dentes com desenvolvimento radicular incompleto. Objetivo: Revisar a literatura sobre as técnicas de revascularização pulpar no tratamento de dentes com ausência de vitalidade pulpar com ápice radicular imaturo. Métodos: Os descritores "pulp revascularization", "pulp necrosis", "immature permanent tooth", "revascularization", "revitalization", "dental pulp", "regeneration" foram utilizados para obtenção de artigos em língua inglesa, que apresentassem conteúdo disponibilizado na íntegra e publicados nos últimos 15 anos. Foram excluídos os trabalhos de relatos de caso e/ou séries de casos. Conclusão: Artigos revisados apresentaram uma heterogeneidade de resultados quanto à efetividade da técnica de revascularização pulpar, visto que os critérios estabelecidos para determinação do sucesso variavam entre os autores. O material mais comumente utilizado na técnica empregada consiste no Agregado Trióxido Mineral (MTA) em consistência pastosa aplicada sobre coágulo sanguíneo com formação induzida no interior do canal. Foi observada escassez de estudos laboratoriais e clínicos sobre as técnicas e materiais em revascularização pulpar, que suportem sua indicação, o que representa uma lacuna em potencial na literatura e requer cautela na indicação desta técnica.

Introduction: Immature permanent teeth that evolve to pulp necrosis represent a challenge for endodontic treatment. Regenerative endodontics and pulp revascularization techniques appear as a dynamic and potentially ideal field for clinical therapy in teeth with incomplete root development. Objective: To review the literature on pulpal revascularization techniques in the treatment of teeth with absence of pulp vitality with immature root apex. Methods: The descriptors "pulp revascularization", "pulp necrosis", "immature permanent tooth", "revascularization", "revitalization", "dental pulp" and "regeneration" were used to obtain articles in English that presented content available in full and published in the last 15 years. Works of case reports and/or series of cases were excluded. Conclusion: Reviewed articles presented a heterogeneity of results regarding the effectiveness of the pulp revascularization technique, since the established criteria for determining success varied among the authors. The material most commonly used in the technique used consists of the Mineral Trioxide Aggregate (MTA) in paste consistency applied on blood clot with induced formation inside the canal. A shortage of laboratory and clinical studies on pulp revascularization techniques and materials that support its indication has been observed, which represents a potential gap in the literature and requires caution in the indication of this technique.