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Soares JA, Soares SMCS, de Jesus Tavarez RR, de Castro Rizzi C, Vaz Rodrigues SCG, Maia Filho EM, Brito-Júnior M, Pereira RD, Magalhães PP, de Macêdo Farias L. Exploring different photodynamic therapy parameters to optimize elimination of Enterococcus faecalis in planktonic form. Photodiagnosis Photodyn Ther 2018; 22:127-131. [DOI: 10.1016/j.pdpdt.2018.03.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Revised: 03/13/2018] [Accepted: 03/28/2018] [Indexed: 01/10/2023]
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Menezes-Silva R, Pereira FV, Santos MH, Soares JA, Soares SMCS, Miranda JLD. Biocompatibility of a New Dental Glass Ionomer Cement with Cellulose Microfibers and Cellulose Nanocrystals. Braz Dent J 2018; 28:172-178. [PMID: 28492746 DOI: 10.1590/0103-6440201701059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/04/2017] [Indexed: 11/22/2022] Open
Abstract
Developing new restorative materials should avoid damage to tissue structures. This study evaluated the biocompatibility of a commercial dental glass ionomer cement (GIC) mechanically reinforced with cellulose microfibers (GIC+CM) or cellulose nanocrystals (GIC+CN) by implantation of three test specimens in subcutaneous tissue in the dorsal region of 15 Rattus norvegicus albinus rats. Each rat received one specimen of each cement, resulting in the following groups (n=15): Group GIC (Control), Group GIC+CM and Group GIC+NC. After time intervals of 7, 30 and 60 days, the animals were sacrificed and the following aspects were histologically evaluated: type of inflammatory cells, fibroblasts, blood vessels, macrophages, giant cells, type of inflammatory reaction and capsule thickness (µm). These events were scored as (-) absent, (+) light, (++) moderate and (+++) intense. The results were statistically analyzed by Kruskal-Wallis test and Mann-Whitney post test. At 7 days, Group GIC+NC showed more favorable tissue repair because quantitatively there were more fibroblasts (p=0.022), fewer macrophages (p=0.008) and mononuclear cells (p=0.033). Polymorphonuclear neutrophils and giant cells were absent in all experimental periods. At 60 days, test specimens in Group GIC+NC were surrounded by a fibrous tissue capsule with reduced thickness (26.72±2.87 µm) in comparison with Group GIC+CM (41.21±3.98 µm) (p=0.025). In general, all biomaterials showed satisfactory biocompatibility, but glass ionomer cement modified with cellulose nanocrystals showed a more advanced tissue repair.
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Affiliation(s)
- Rafael Menezes-Silva
- Department of Dentistry, Endodontics and Dental Materials, Bauru Dental School, USP - Universidade de São Paulo, Bauru, SP, Brazil
| | - Fabiano Vargas Pereira
- Department of Chemistry, UFMG - Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Maria Helena Santos
- Biomaterials Advanced Center - BioMat, UFVJM - Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brazil
| | - Janir Alves Soares
- Department of Dentistry, UFVJM - Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brazil
| | | | - João Luiz de Miranda
- Department of Basic and Health Sciences, UFVJM - Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG, Brazil
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Santos Soares SMC, Brito-Júnior M, de Souza FK, Zastrow EV, Cunha COD, Silveira FF, Nunes E, César CAS, Glória JCR, Soares JA. Management of Cyst-like Periapical Lesions by Orthograde Decompression and Long-term Calcium Hydroxide/Chlorhexidine Intracanal Dressing: A Case Series. J Endod 2017; 42:1135-41. [PMID: 27325458 DOI: 10.1016/j.joen.2016.04.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/22/2016] [Accepted: 04/24/2016] [Indexed: 12/14/2022]
Abstract
Cyst-like periapical lesions should be treated initially with conservative nonsurgical procedures. In this case series, we describe the clinical and radiographic outcomes of large cyst-like lesions that were treated by orthograde decompression and long-term intracanal use of calcium hydroxide [Ca(OH)2] mixed with 2% chlorhexidine digluconate. Ten cases of cyst-like periapical lesions involving 15 teeth from 10 patients were selected. Maximal radiographic diameters of the lesions ranged from 11 to 28 mm. Nonsurgical procedures were performed, including apical patency, orthograde puncture of cyst-like exudates, chemomechanical preparation, and placement of intracanal Ca(OH)2/CHX dressings, which were periodically replaced during 6-10 months. The root canals were then filled with gutta-percha and sealer. The follow-up periods ranged from 6 to 24 months, and the outcome was classified as healed, healing, or failure. Nine lesions drained copious exudates after canal patency. One lesion only drained bloody serous exudate after periapical overinstrumentation. In 9 patients, intracanal exudation ceased in the first follow-up visit. At the 24-month follow-up, 6 lesions (60.0%) had healed, and 3 lesions (30.0%) were healing, with the corresponding patients being without clinical signs or symptoms. The case of treatment failure was submitted to surgical treatment. Microscopically, the lesion appeared to be an apical cyst with exuberant extraradicular bacterial biofilms attached to the sectioned root apex. This case series supports the use of nonsurgical methods to resolve larger cyst-like periapical lesions.
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Affiliation(s)
| | - Manoel Brito-Júnior
- Department of Dentistry, State University of Montes Claros, Montes Claros, Minas Gerais, Brazil
| | - Flávia Kelly de Souza
- Department of Dentistry, Federal University of Waleys Jequitinhonha and Mucuri, Diamantina, Minas Gerais, Brazil
| | - Eduardo Von Zastrow
- Department of Dentistry, Federal University of Waleys Jequitinhonha and Mucuri, Diamantina, Minas Gerais, Brazil
| | - Carla Oliveira da Cunha
- Department of Dentistry, Federal University of Waleys Jequitinhonha and Mucuri, Diamantina, Minas Gerais, Brazil
| | - Frank Ferreira Silveira
- Department of Dentistry, Pontificial Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Eduardo Nunes
- Department of Dentistry, Pontificial Catholic University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Carlos Augusto Santos César
- Department of Dentistry, Federal University of Waleys Jequitinhonha and Mucuri, Diamantina, Minas Gerais, Brazil
| | - José Cristiano Ramos Glória
- Department of Dentistry, Federal University of Waleys Jequitinhonha and Mucuri, Diamantina, Minas Gerais, Brazil
| | - Janir Alves Soares
- Department of Dentistry, Federal University of Waleys Jequitinhonha and Mucuri, Diamantina, Minas Gerais, Brazil.
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Costa GM, Soares SMCS, Marques LS, Gloria JCR, Soares JA. Strategy for apexification of wide-open apex associated with extensive periapical lesion in a weakened root. Gen Dent 2013; 61:e2-e4. [PMID: 23649583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This case report describes successful apexification for a challenging case involving a 30-year-old man, who suffered from dental trauma involving tooth No. 7 (which had occurred several years earlier) and recently experienced acute periapical abscess in this region. Radiographic analysis revealed incomplete root formation, a wide-open apex, thin root canal walls, and an extensive periapical lesion. Chemomechanical debridement was performed gently using K-files and irrigation with a 1% sodium hypochlorite solution. The root canal was filled with a calcium hydroxide paste, which was replaced periodically. At 18 months post-treatment, an apical barrier tissue and significant reduction of periapical radiolucency were observed; at that time, the entire root canal was filled with gray mineral trioxide aggregate (MTA). At a follow-up 16 months later, the tooth had normal function and periapical repair was complete.
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Affiliation(s)
- George Moreira Costa
- Department of Endodontics, Diamantina Dental School, Federal University of Vales do Jequitinhonha e Mucuri, Diamantina, Minas Gerais, Brazil
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