FMD - Artigos em Revistas Internacionais
Permanent URI for this collection
Browse
Recent Submissions
- Implant survival in immediately loaded full-arch rehabilitations following an anatomical classification systemPublication . Caramês, João Manuel Mendez; Marques, Duarte Nuno da Silva; Vieira, Filipe AraújoThis retrospective study analyzed implant survival of immediate implant-supported fixed complete denture (IFCD) treatment options (TOs) based on the level of alveolar atrophy (CC). Records of 882 patients receiving a total of 6042 implants at one private referral clinic between 2004 and 2020 were considered. The mean follow-up period was 3.8 ± 2.7 years. Cumulative implant survival rates (CSRs) were analyzed as a function of CCs and TOs according to Mantel-Haenszel and Mantel-Cox. Hazard risk ratios for implant loss were compared using Cox regression. Confounding factors were identified using mixed Cox regression models. The 2- and 5-year CSRs were 98.2% and 97.9%, respectively. Maxillary 2- and 5-year CSRs were lower (97.7% and 97.3%) compared to mandibular CSRs (99.8% and 98.6%) (p = 0.030 and 0.0020, respectively). The CC did not influence CSRs of IFCDs in the mandible (p = 0.1483 and 0.3014, respectively) but only in the maxilla (p = 0.0147 and 0.0111), where CSRs decreased with increasing atrophy. TOs did not statistically differ in terms of survival rate for a given level of alveolar atrophy. The adaption of IFCD treatments to the level of atrophy and patient-specific risk factors can result in high CSRs, even at different levels of bone atrophy.
- Dental age assessment by I 2M and I 3MPublication . Augusto, A.; Pereira, C. PalmelaObjective: Better understanding of dental age assessment may help in cases of age estimation in Forensic Clinics. The first aim was to provide essential information on method reliability for upcoming studies using dental age assessment by second molar index (I2M), and third molar index (I3M) for age estimation on legal ages of 12 - 14 years. The second aim was to document forensic method outcomes of the Demirjian method which has already been used in forensic clinic. Material and methods: Two samples were used for this purpose: for I2M, 633 orthopantomographs (270 females / 363 males), the age range from 7 to 17 years and for I3M, 471 orthopantomographs (253 females / 218 males), the age range from 10 to 23 years, from the database population of Lisbon North University Hospital Center, approved by the Ethic Committee. Results: The I3M cut-off point (1.133) for 12- year- olds obtained better results than the cut-off point stated by the I2M (0.135). Besides, I2M cut-off point (0.001) for 14- year- olds showed better results when compared with the cut-off point (0.705) established by the I3M. Both methods are reliable for the legal age thresholds of 12 and 14 years. However, using I2M and I3M allows us to vary the cut-off value to privilege sensitivities or specificity, depending on which is more appropriate to the intended application. Conclusions: The accuracy (88.94%) of I3M obtained better results for the 12- year- old cut-off point (1.133) and the accuracy (90.21%) of the I2M performed better for the 14- year- old cut-off point (0.001).
- Comparison of the third molar maturity index (I3M) between left and right lower third molars to assess the age of majorityPublication . Angelakopoulos, N.; Galić, I.; Pereira, Palmela C.
- Relationship between oral health literacy and periodontal healthPublication . Assunção, Victor; Dias, Rafael; Luis, Henrique; Soares Luis, Luis FranciscoObjectives The objective of this study was to describe oral health literacy and its association with periodontal health status. Methods A population of young adults, enlisted personnel, at a military police force at Escola da Guarda (EG - GNR) in Portalegre, Portugal, participated in this crosssectional study. Information on sociodemographic, dental and oral health literacy was collected. Oral health literacy was assessed using OHLI (Oral Health Literacy Instrument). Clinical periodontal examinations were performed, and data was obtained for oral hygiene status and severity of gingival inflammation. Results A total of 274 participants enrolled and completed the study. Most participants (54.7 percent) had an adequate oral health literacy level. For 38 percent the level of literacy was marginal and, 7.3 percent had an inadequate level of oral health literacy. There is an association between education and oral health literacy (P<0.001). Female participants had more general oral health knowledge than males (P=0.034). Participants with the 12th grade or less have statistically significant less general oral health knowledge than participants with a bachelor’s degree (P<0.001). Dental plaque index was lower for participants with higher attendance of dental appointments (P=0.002) and adequate oral health literacy (P = 0.009). Conclusions Oral health literacy, education and frequency of dental appointments were associated. General oral knowledge is worst for males and people with lower education levels. Oral hygiene status is better for participants with adequate oral health literacy and a higher number of dental appointments.
- Randomized controlled trial on mouth rinse and flossing efficacy on interproximal gingivitis and dental plaquePublication . Luis, Henrique; Soares Luis, Luis Francisco; Bernardo, Mário; Santos, N. R.Objective: The objective of this study was to compare the efficacy of an essential oils mouth rinse and dental floss on dental plaque accumulation and gingivitis in interproximal areas. Methods: With informed consent, a parallel randomized controlled clinical trial was developed with 60 third-year dental hygiene students, randomly divided into two non-blind groups of 30 individuals each. For a period of 2 weeks, one group used an essential oils mouth rinse, according to manufacturer’s instructions, and the other group flossed twice a day. Both groups received a toothbrush and fluoridated toothpaste for home dental hygiene care. A baseline dental hygiene appointment consisted of tooth scaling, prophylaxis and collection of the study data, using the Lobene modified gingival index; Saxton & Ouderaa gingival bleeding index and the Quigley & Hein modified by Turesky dental plaque index. Results: At baseline, there was no significant difference between the groups for interproximal gingival inflammation (P = .214), gingival bleeding (P = .829) and dental plaque accumulation (P = .860). After 2 weeks of treatment, no significant differences were found between the essential oils mouth rinse and dental flossing for reduction of interproximal gingival inflammation (P = .938) and bleeding (P = .307). Essential oils mouth rinse showed to be significantly better than dental flossing in reducing interproximal dental plaque accumulation (P = .006). Conclusion: The use of an essential oils mouth rinse may be advised, as a complement, for patients unable to floss effectively, as it is more effective in reducing interproximal dental plaque accumulation than dental floss.
- Tradução e validação para a língua portuguesa de um instrumento de alfabetização em saúde bucalPublication . Assunção, Victor; Luis, Henrique; Silva, André; Soares Luis, Luis FranciscoA quantificação do nível de alfabetização em saúde é um aspeto fundamental para a saúde pública, uma vez que os indivíduos que apresentam níveis limitados de alfabetização em saúde possuem dificuldades significativas em comunicar com sucesso na sociedade atual. OBJETIVOS: Traduzir e validar a versão na língua portuguesa do Oral Health Literacy Instrument (OHLI) para avaliação da alfabetização em saúde bucal de adultos. MATERIAIS E MÉTODOS: A tradução e validação da versão na língua portuguesa do OHLI foi realizada em indivíduos com idade superior a 19 anos na região de Lisboa. Foram analisadas variáveis de caracterização da amostra e de alfabetização em saúde. O valor total do OHLI foi obtido pela soma das dimensões de leitura, compreensão e habilidade para contar. A consistência interna foi avaliada pelo α de Cronbach, a validação do constructo foi efetuada pela análise fatorial das questões de uma mesma dimensão e a aplicação do teste estatístico Kaiser-Meyer-Olkin. RESULTADOS: Dos 81 entrevistados, 76,5% eram mulheres. Obtiveram-se valores elevados de consistência interna, tanto para o OHLI (0,8) como para as suas dimensões (0,7). Para o teste de conhecimentos foi obtido um valor de 0,70. O valor final médio do OHLI foi de 81,21 tendo-se observado valores mais elevados nas pessoas com habilitações escolares superiores (p<0,001). CONCLUSÕES: A versão na língua portuguesa do OHLI (P-OHLI) é um instrumento confiável e válido e pode ser aplicado em adultos de língua portuguesa, com as adaptações necessárias à identidade cultural, para avaliação da alfabetização em saúde bucal.
- Morphology of the dentin–resin interface yielded by twostep etch-and-rinse adhesives with different solventsPublication . Ferreira, João C.; Pires, Patrícia T.; Azevedo, Álvaro F. de; Oliveira, Sofia Arantes e; Silva, Mário J.; Melo, Paulo R. deAim: The study aimed to analyze the morphology of the dentin– resin interface yielded by two-step etch-and-rinse adhesive systems with different solvents and compositions. Materials and methods: A total of 32 dentine disks were prepared and randomly assigned to four groups of one-bottle etchand- rinse adhesive systems containing different solvents: group I, Adper Scotchbond-1XT™ (ethanol/water); group II, XP-Bond™ (tertiary butanol); group III, Prime and Bond NT® (acetone); and group IV, One Coat bond® (5% water). Adhesive systems were applied onto dentin disks, which were then thermal cycled, divided into two hemi-disks (n = 16), and prepared for field-emission scanning electron microscopy to examine the dentin–resin interdiffusion zone. Microphotographs were scanned and data were processed. Data were compared with analysis of variance multivariant test after Kolmogorov–Smirnov and Shapiro–Wilk tests using Statistic Package for the Social Sciences. Results: The adhesive layer thickness average found was group I: 45.9 ± 13.41 μm, group II: 20.6 ± 16.32 μm, group III: 17.7 ± 11.75 μm, and group IV: 50.7 ± 27.81 μm. Significant differences were found between groups I and IV and groups II and III (p<0.000). Groups I (3.23 ± 0.53 μm) and II (3.13 ± 0.73 μm) yielded significantly thicker hybrid layers than groups III (2.53 ± 0.50 μm) and IV (1.84 ± 0.27 μm) (p<0.003). Group III presented a less homogeneous hybrid layer, with some gaps. Tag length average was greater in groups II (111.0 ± 36.92 μm) and IV (128.9 ± 78.38 μm) than in groups I (61.5 ± 18.10 μm) and III (68.6 ± 15.84 μm) (p<0.008). Conclusion: Adhesives systems with different solvents led to significant differences in the dentin–resin interface morphology.
- Influence of solvents and composition of etch-and-rinse and self-etch adhesive systems on the nanoleakage within the hybrid layerPublication . Ferreira, João Cardoso; Pires, Patricia Teixeira; Azevedo, Álvaro Ferreira; Oliveira, Sofia Arantes; Melo, Paulo Ribeiro; Silva, Mário JorgeAim: The goal of this study was to evaluate nanoleakage within the hybrid layer yielded by etch-and-rinse and self-etch adhesive systems, with different solvents and compositions. Materials and methods: Four adhesives were applied onto 20 human dentin disks: group A: Adper Scotchbond 1XT™ (3M ESPE), group B: One Coat Bond® (Coltène Whaledent), group C: AdheSE® (Ivoclar Vivadent) and group D: Xeno-V® (Dentsply). The samples were immersed in aqueous ammoniacal silver nitrate for 24 hour, prepared and observed under field-emission scanning electron microscopy with backscattered electrons. Microphotographs were scanned and data were processed. The mean value and standard deviation were calculated. Kruskal- Wallis and Mann-Whitney tests were used (p < 0.05). Results: All the adhesives showed nanoleakage within the hybrid layer: Adper Scotchbond 1XT™ (218.5 μm ± 52.6 μm), One Coat Bond® (139.6 μm ± 79.0 μm), AdheSE® (92.7 μm ± 64.8 μm) and Xeno-V® (251.0 μm ± 85.2 μm). AdheSE® yielded less nanoleakage than Adper Scotchbond-1XT™ (p = 0.003) and than Xeno-V® (p = 0.007). No other statistically significant differences were detected. Conclusion: Two-step self-etch adhesive system (AdheSE®) might contribute for lower nanoleakage deposition and thus better performance in dentin adhesion. Clinical significance: The two-step self-etch adhesive system showed the lowest nanoleakage deposition compared with the other adhesive systems evaluated, which seems to indicate a better behavior when a restoration is performed in dentin and possibly can lead to a durable adhesion along time.
- Ceramic repair: influence of chemical and mechanical surface conditioning on adhesion to zirconiaPublication . Barragan, Gonçalo; Chasqueira, Filipa; Oliveira, Sofia ArantesAims: To evaluate the influence of mechanical surface treatment and chemical primer application on the composite shear bond strength to zirconia. Methods: Eighty blocks of Lava Frame Zirconia were randomly assigned to the experimental groups, according to the several possible combinations between mechanical (untreated/aluminum oxide sandblast) and chemical treatment (no primer/Monobond Plus/Experimental Zirkon-Primer/Z-Prime Plus) (n=10). Adhesive system and composite resin were then applied, and samples were thermal cycled (5ºC-55ºC, 500 cycles). Shear bond strength tests and failure mode analysis were performed. SBS data were analyzed by two-way ANOVA, followed by Student-Newman-Keuls post-hoc tests, and failure mode by Kruskal-Wallis and Mann-Whitney tests (p<0.05). Results: Shear bond strength mean values ranged from 6.9 to 23.2 MPa. Surface treatment with aluminum oxide sandblasting allowed a statistically significant increase (p<0.05) in bond strength values. The group treated with Z-Prime Plus achieved (p<0.05) higher bond strength results than the other chemical treatments. Conclusions: The surface mechanical treatment almost doubled the bond strength values. Z-Primer Plus have enhanced bond strength values of composite to zirconia.
- Maintenance of a proper dental hygienePublication . Luis, Henrique