Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time
Purpose. To evaluate the mineral ion loss of root dentine after treatment with 2% chlorhexidine solution (CHX) and to compare its yield and flexural strength (fs) after exposure to calcium hydroxide [Ca(OH)2]. Materials and Methods. Dentine bars (DB) were made from 90 roots of bovine incisors and ra...
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | International Journal of Dentistry |
| Online Access: | http://dx.doi.org/10.1155/2017/1579652 |
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| author | Michael Ranniery Garcia Ribeiro Érika Bárbara Abreu Fonseca Thomaz Darlon Martins Lima Tarcísio Jorge Leitão José Bauer Soraia De Fátima Carvalho Souza |
| author_facet | Michael Ranniery Garcia Ribeiro Érika Bárbara Abreu Fonseca Thomaz Darlon Martins Lima Tarcísio Jorge Leitão José Bauer Soraia De Fátima Carvalho Souza |
| author_sort | Michael Ranniery Garcia Ribeiro |
| collection | DOAJ |
| description | Purpose. To evaluate the mineral ion loss of root dentine after treatment with 2% chlorhexidine solution (CHX) and to compare its yield and flexural strength (fs) after exposure to calcium hydroxide [Ca(OH)2]. Materials and Methods. Dentine bars (DB) were made from 90 roots of bovine incisors and randomized into three groups: GControl: distilled/deionized water (DDW), GNaOCl: 2.5% sodium hypochlorite + 17% EDTA, and GCHX: CHX + DDW. The release of phosphate (PO4) and calcium (Ca) ions was measured by spectrophotometry. The DB were exposed to Ca(OH)2 paste for 0, 30, 90, and 180 days. DB were subjected to the three-point bending test to obtain yield and fs values. The fracture patterns were evaluated (20x). Data were analyzed using Kruskal-Wallis and Dunn’s post hoc tests or one- and two-way ANOVA followed by Tukey’s post hoc test (α=0.05). Results. GCHX showed lower PO43- and Ca2+ ionic release than GNaOCl (p<0.001). For yield and fs, GCHX>GNaOCl in all periods (p<0.001), except for yield strength values on 90 days (p=0.791). A larger frequency of vertical fractures was observed in GNaOCl and that of oblique fractures in GCHX (p<0.05). Conclusions. CHX prevented PO43- and Ca2+ loss and showed a tendency to preserve the yield and fs of root dentine over time following exposure to Ca(OH)2 paste. |
| format | Article |
| id | doaj-art-505f7160385e46b5ae94d5bc9d5cf081 |
| institution | OA Journals |
| issn | 1687-8728 1687-8736 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Dentistry |
| spelling | doaj-art-505f7160385e46b5ae94d5bc9d5cf0812025-08-20T02:05:17ZengWileyInternational Journal of Dentistry1687-87281687-87362017-01-01201710.1155/2017/15796521579652Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over TimeMichael Ranniery Garcia Ribeiro0Érika Bárbara Abreu Fonseca Thomaz1Darlon Martins Lima2Tarcísio Jorge Leitão3José Bauer4Soraia De Fátima Carvalho Souza5Post-Graduate Program of Dentistry, Federal University of Maranhão (UFMA), São Luis, MA, BrazilDepartment of Public Health, Federal University of Maranhão (UFMA), São Luis, MA, BrazilDepartment of Dental Materials, Federal University of Maranhão (UFMA), São Luis, MA, BrazilDepartment of Pediatric Dentistry, Federal University of Maranhão (UFMA), São Luis, MA, BrazilDepartment of Dental Materials, Federal University of Maranhão (UFMA), São Luis, MA, BrazilDepartment of Endodontics, Federal University of Maranhão (UFMA), São Luis, MA, BrazilPurpose. To evaluate the mineral ion loss of root dentine after treatment with 2% chlorhexidine solution (CHX) and to compare its yield and flexural strength (fs) after exposure to calcium hydroxide [Ca(OH)2]. Materials and Methods. Dentine bars (DB) were made from 90 roots of bovine incisors and randomized into three groups: GControl: distilled/deionized water (DDW), GNaOCl: 2.5% sodium hypochlorite + 17% EDTA, and GCHX: CHX + DDW. The release of phosphate (PO4) and calcium (Ca) ions was measured by spectrophotometry. The DB were exposed to Ca(OH)2 paste for 0, 30, 90, and 180 days. DB were subjected to the three-point bending test to obtain yield and fs values. The fracture patterns were evaluated (20x). Data were analyzed using Kruskal-Wallis and Dunn’s post hoc tests or one- and two-way ANOVA followed by Tukey’s post hoc test (α=0.05). Results. GCHX showed lower PO43- and Ca2+ ionic release than GNaOCl (p<0.001). For yield and fs, GCHX>GNaOCl in all periods (p<0.001), except for yield strength values on 90 days (p=0.791). A larger frequency of vertical fractures was observed in GNaOCl and that of oblique fractures in GCHX (p<0.05). Conclusions. CHX prevented PO43- and Ca2+ loss and showed a tendency to preserve the yield and fs of root dentine over time following exposure to Ca(OH)2 paste.http://dx.doi.org/10.1155/2017/1579652 |
| spellingShingle | Michael Ranniery Garcia Ribeiro Érika Bárbara Abreu Fonseca Thomaz Darlon Martins Lima Tarcísio Jorge Leitão José Bauer Soraia De Fátima Carvalho Souza Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time International Journal of Dentistry |
| title | Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time |
| title_full | Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time |
| title_fullStr | Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time |
| title_full_unstemmed | Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time |
| title_short | Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time |
| title_sort | chlorhexidine prevents root dentine mineral loss and fracture caused by calcium hydroxide over time |
| url | http://dx.doi.org/10.1155/2017/1579652 |
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