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Jordani LD, da Rosa AF, Dias-Junior LCDL, Savaris JM, Minamisako MC, da Silva LR, Takashima MTU, Bortoluzzi EA, da Silveira Teixeira C, da Fonseca Roberti Garcia L. Ultrasonic activation of the endodontic sealer enhances its intratubular penetration and bond strength to irradiated root dentin. Odontology 2024; 112:917-928. [PMID: 38194041 DOI: 10.1007/s10266-023-00888-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/10/2023] [Indexed: 01/10/2024]
Abstract
To evaluate the effect of ultrasonic activation of the endodontic sealer on its intratubular penetration and bond strength to irradiated root dentin. Forty human teeth were distributed into 4 groups (n = 10), according to the radiation therapy (RT) exposure-70 Gy-and ultrasonic activation (UA) of the endodontic sealer: RT/UA-irradiated teeth and sealer UA; RT/no-UA-irradiated teeth and no sealer UA; no-RT/UA-non-irradiated teeth and sealer UA and no-RT/no-UA-non-irradiated teeth and no sealer UA. Push-out bond strength test was performed in a Universal Testing Machine. Failure modes and adhesive interface were analyzed under Scanning Electron Microscopy. The data were statistically compared (two-way-ANOVA and posthoc Games-Howell test; Fisher's exact test - α = 5%). The different experimental conditions (radiation and UA) and the root third had a significant effect on push-out bond strength, and the interaction of these factors was significant (p < 0.05). UA of the sealer significantly increased its bond strength to both irradiated and non-irradiated dentin (p < 0.05). The irradiated groups mostly presented adhesive-type failure of the sealer (p < 0.01). Regardless of the irradiation, the ultrasonically activated groups showed a more homogeneous adhesive interface, with the presence of sealer tags in greater density and depth. Ultrasonic activation enhanced the intratubular penetration and the bond strength of the endodontic sealer to irradiated dentin. The impact of ultrasonic activation of the endodontic sealer on teeth undergoing radiotherapy is a gap in the scientific literature that needs to be bridged.
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Affiliation(s)
- Luana Duart Jordani
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - Amanda Freitas da Rosa
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - Luiz Carlos de Lima Dias-Junior
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - Julia Menezes Savaris
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil
| | | | - Luciano Roberto da Silva
- Department of Radiotherapy, Oncology Research Centre (CEPON), Florianópolis, Santa Catarina, Brazil
| | | | - Eduardo Antunes Bortoluzzi
- Department of Diagnosis and Oral Health, Endodontics Division, University of Louisville, Louisville, KY, USA
| | - Cleonice da Silveira Teixeira
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil
| | - Lucas da Fonseca Roberti Garcia
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Florianópolis, Santa Catarina, 88040-900, Brazil.
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Yanık D, Turker N. Glycolic acid on push-out bond strength of fiber post and smear removal: an in vitro study. Odontology 2024; 112:739-750. [PMID: 38507151 DOI: 10.1007/s10266-024-00928-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 11/16/2023] [Indexed: 03/22/2024]
Abstract
This study aims to investigate glycolic acid (GA) as a final irrigant on push-out bond strength of fiber post and smear removal. Ninety mandibular premolars were stabilized with a silicone key and photographed, and canal cross-section was calculated by image processing software. Round canal morphology was selected. The specimens were divided into five groups (n = 18); 10%GA, 17%EDTA, NaOCl + 10%GA, NaOCl + 17%EDTA, and the control. Fifteen specimens were used for the push-out. Three specimens were evaluated using a scanning electron microscope after post space preparation. Two-way ANOVA and Chi-square were used for statistics. GA presented higher strength than EDTA (p < 0.05). The NaOCl + GA showed higher strength than the NaOCl + EDTA (p < 0.05). The highest values were observed in cervical and lowest in apical thirds (p < 0.05). The most failure type was between dentin and resin (p < 0.05). GA removed the smear in the post space including the apical third. The NaOCl + GA has superiority to NaOCl + EDTA on push-out strength. Glycolic acid improved the bond strength of fiber post when used as a final post space irrigant. The combination of NaOCl and glycolic acid did not negatively affect the bond strength and was more effective compared to the combination with EDTA. Glycolic acid improved the bond strength of fiber post when used as a final post space irrigant. The combination of NaOCl and glycolic acid did not negatively affect the bond strength and was more effective compared to the combination with EDTA.
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Affiliation(s)
- Deniz Yanık
- Department of Endodontics, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey.
| | - Nurullah Turker
- Department of Prosthodontics, Faculty of Dentistry, Akdeniz University, Antalya, Turkey
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Ghidini GP, de Lima Dias-Junior LC, Minamisako MC, Takashima MTU, Cábia NC, Machado RG, Bortoluzzi EA, da Silveira Teixeira C, da Fonseca Roberti Garcia L. Ultrasonic activation of adhesive systems increases bond strength and intratubular penetration of resin cement in root dentin subjected to radiation therapy. Clin Oral Investig 2024; 28:386. [PMID: 38890207 DOI: 10.1007/s00784-024-05782-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 06/11/2024] [Indexed: 06/20/2024]
Abstract
OBJECTIVE This study aimed to evaluate the effect of ultrasonic activation of etch-and-rinse and self-etch adhesive systems on the bond strength of resin cement to irradiated root dentin. MATERIALS AND METHODS Eighty human maxillary anterior teeth were distributed into 8 groups (n = 10), according to the type of adhesive system used (etch-and-rinse and self-etch), the ultrasonic activation of the adhesive systems, and the dentin condition (irradiated or non-irradiated - 70 Gy). Endodontic treatment was performed followed by fiberglass post-space preparation. After fiberglass posts' luting, the roots were transversely sectioned on dentin discs and submitted to the push-out bond strength test (0.5 mm/min). The fractured specimens were analyzed under a stereomicroscope and Scanning Electron Microscope (SEM) for failure mode classification. One of the dentin discs was analyzed under SEM to evaluate the characteristics of the adhesive interface. RESULTS Irradiated specimens had lower bond strength than non-irradiated specimens (P < 0.0001). Ultrasonic activation of both adhesive systems increased the bond strength of the resin cement to irradiated dentin (P < 0.0001). Radiotherapy significantly affected the failure mode in the middle (P = 0.024) and apical thirds (P = 0.032) (adhesive failure). CONCLUSION Non-irradiated specimens had a more homogeneous adhesive interface. When ultrasonically activated, both adhesive systems showed a greater number of resinous tags, regardless of the dentin condition. CLINICAL RELEVANCE Ultrasonic activation of adhesive systems is a feasible strategy to enhance fiberglass posts retention in oncological patients.
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Affiliation(s)
- Gabriela Pasqualin Ghidini
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | - Luiz Carlos de Lima Dias-Junior
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | | | | | - Nayara Cardoso Cábia
- Department of Radiotherapy, Oncology Research Center (CEPON), Florianópolis, SC, Brazil
| | - Renata Gondo Machado
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | - Eduardo Antunes Bortoluzzi
- Department of Diagnosis & Oral Health, School of Dentistry, University of Louisville, Louisville, KY, USA
| | - Cleonice da Silveira Teixeira
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil
| | - Lucas da Fonseca Roberti Garcia
- Department of Dentistry, Endodontics Division, Federal University of Santa Catarina, Campus Reitor João David Ferreira Lima, Trindade, Florianópolis, Florianopolis, SC, CEP, 88040-900, Brazil.
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Brito-Júnior M, Silva-Sousa YTC, Pereira RD, Camilo CC, Mazzi-Chaves JF, Lopes-Olhê FC, Sousa-Neto MD. An automated method to analyze root filling voids and gaps using confocal microscopy images. Odontology 2024; 112:546-551. [PMID: 37803215 DOI: 10.1007/s10266-023-00859-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/21/2023] [Indexed: 10/08/2023]
Abstract
This study evaluated the feasibility of an automated method to delimit the required area to quantitatively analyze root filling voids and gaps from cross-sectional confocal laser scanning microscopy (CLSM) images. Root canals of maxillary canines were prepared with rotary instruments and filled by lateral compaction technique using gutta-percha and AH Plus sealer. The roots were stored (100% humidity, 37 °C) for a period of 24 h and then transversally sectioned to obtain 2-mm-thick slices from the apical and middle thirds. The areas corresponding to filling materials, gaps, and voids were manually delimited or automatically demarked by ImageJ software after converting the images to the RGB color system. Based on manual and automatic delimitations, the percentages of voids and gaps were calculated. Data of voids and gaps between middle and apical thirds were individually compared by paired t-test. Pearson`s correlation test was used to assess the correlation of data between the methods. Irrespective of the method of area delimitation, no difference was observed between the root thirds for both voids and gaps, while the p-values calculated for each method were similar. Almost perfect correlations between the methods were observed for both outcomes. The proposed method to automatically delimit the areas corresponding to filling material, voids, and gaps appears to be a valid method to facilitate the quantitative analysis of defects in root canal fillings using topographic CSLM images.
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Affiliation(s)
- Manoel Brito-Júnior
- Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil
| | | | - Rodrigo Dantas Pereira
- Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil
| | - Carla Cristina Camilo
- Department of Dentistry, UNIMONTES - State University of Montes Claros, Montes Claros, MG, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo - USP, Rua Célia de Oliveira Meirelles 350, Ribeirão Preto, SP, 14024-070, Brazil
| | - Fabiane Carneiro Lopes-Olhê
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo - USP, Rua Célia de Oliveira Meirelles 350, Ribeirão Preto, SP, 14024-070, Brazil
| | - Manoel D Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo - USP, Rua Célia de Oliveira Meirelles 350, Ribeirão Preto, SP, 14024-070, Brazil.
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Quaresma SAL, Alves Dos Santos GN, Silva-Sousa AC, Camargo RV, Silva-Sousa YT, Lopes-Olhê FC, Mazzi-Chaves JF, Sousa-Neto MD. Influence of bioceramic cones on the quality of root canal filling relative to bond strength and adaptation of the adhesive interface. Clin Oral Investig 2023; 27:7919-7933. [PMID: 38032392 DOI: 10.1007/s00784-023-05385-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 11/13/2023] [Indexed: 12/01/2023]
Abstract
AIM To evaluate the bond strength (BS) and analysis of the adhesive interface in root canals filled with bioceramic gutta percha sealers and cones. MATERIAL AND METHODS Ninety-six maxillary canines were divided into eight groups according to the endodontic sealer (AH Plus, AH Plus Bioceramic, Bio-C Sealer or Bio-C Sealer Ion+ and gutta percha cones (conventional or bioceramic) tested. They were analyzed using the BS test, failure pattern, analysis of the adhesive interface by scanning electron microscopy and confocal laser scanning microscopy. The BS data were compared between groups using the analysis of variance test with the Turkey post-test. The chi-square test was used to assess the type of failure and the non-parametric Mann-Whitney and Kruse-Wallis tests (P < 0.05). RESULTS Analysis of variance showed higher BS values for the groups of bioceramic gutta percha cones in Bio-C Sealer Ion+ (8.38 ± 4.27), AH Plus Bioceramic (6.19 ± 3.28), Bio-C Sealer (5.70 ± 3.18), AH Plus (4.61 ± 2.11) and for conventional gutta percha cones in AH Plus sealers (4.26 ± 2.35), Bio-C Sealer Ion + (3.63 ± 2.29), Bio-C Sealer (2.94 ± 2.32) and AH Plus Bioceramic (1.19 ± 0.89) (P < 0.05). Relative to the type of failure and adaptation of the types of filling material, a higher percentage of mixed failures was observed (gaps between 1 µm-10 µm) for the group with bioceramic gutta percha cones (P < 0.001). CONCLUSION The bond between sealers and bioceramic gutta percha cones showed higher bond strength values and greater penetration into the dentin tubules. CLINICAL RELEVANCE The filling the root canal system with bioceramic sealers should be associated with bioceramic gutta percha cones.
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Affiliation(s)
- Sérgio André Lopes Quaresma
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil
| | - Guilherme Nilson Alves Dos Santos
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil
| | - Alice Corrêa Silva-Sousa
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil
| | - Rafael Verardino Camargo
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil
| | | | - Fabiane Carneiro Lopes-Olhê
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Av. do Café, s/n, Ribeirão Preto, São Paulo, 14020-904, Brazil.
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Assis HCD, Bertolini GR, Sousa-Neto MD, Lopes-Olhê FC. Analysis of the adhesive interface of dentine treated with carbodiimide and chitosan before cementation of fiberglass posts with different resin cements. J Biomed Mater Res B Appl Biomater 2023; 111:1840-1852. [PMID: 37287402 DOI: 10.1002/jbm.b.35289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 03/27/2023] [Accepted: 05/18/2023] [Indexed: 06/09/2023]
Abstract
The objective of this study is to evaluate the effect of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and chitosan (CHI) on the adhesive interface of resin cements to root dentine. Forty-five upper canines were sectioned, endodontically treated, prepared and divided into three groups according to dentine treatment (distilled water-DW, CHI 0.2% and EDC 0.5) and in three subgroups according to resin cement: RelyX ARC, Panavia F 2.0 or RelyX U200. Slices were obtained, with five slices of each third submitted to the analysis of the adaptation of the adhesive interface through scores and the perimeter with gaps in confocal laser scanning microscopy and one slice of each third later evaluated qualitatively in scanning electron microscopy. The results were analyzed using with Kruskal-Wallis and Spearman correlation tests. There was no difference in adaptation for the different resin cements (p = .438). EDC presented better adaptation when compared to the groups treated with DW and CHI (p < .001), while the CHI and DW presented similar adaptation values (p = .365). No difference was observed in the perimeter referring to the gap areas for the different resin cements (p = .510). EDC showed a lower percentage of perimeters with gaps when compared to CHI (p < .001), with the percentage of perimeter with gaps of teeth treated with CHI being lower than DW (p < .001). A positive correlation coefficient equal to 0.763 was obtained between the perimeter with gaps and the adaptation data of the adhesive interface (p < .001). EDC resulted in better adaptation of the adhesive interface and a lower percentage of perimeters with gaps compared to chitosan.
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Affiliation(s)
- Helena Cristina de Assis
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Gunther Ricardo Bertolini
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Fabiane Carneiro Lopes-Olhê
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
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Cancelier PDA, Machado RG, Savaris JM, Bortoluzzi EA, Teixeira CDS, Minamisako MC, Rodrigues PM, Netto VR, Dutra-Horstmann KL, Garcia LDFR. Effect of the timing of radiation therapy on the push-out strength of resin cement to root dentine. AUST ENDOD J 2023; 49 Suppl 1:122-131. [PMID: 36251405 DOI: 10.1111/aej.12699] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 09/05/2022] [Accepted: 10/05/2022] [Indexed: 11/30/2022]
Abstract
This study investigated the effect of radiation timing on the bond strength of resin cement to intraradicular dentine. Fifty human teeth were distributed into 5 groups (n = 10): Control (nonirradiated teeth), Before-RCT (teeth irradiated before root canal treatment), After-CH (teeth irradiated after canal preparation and placement of calcium hydroxide intracanal dressing), After-RCT (teeth irradiated after completion of root canal treatment) and After-FPL (teeth irradiated after luting of a glass fibre post). Each tooth received 70 Gy irradiation. The roots were sectioned for push-out strength testing. After-RCT and After-FPL groups had significantly lower push-out strength than the control at the middle third (p < 0.05). Control and After-CH groups had a higher percentage of cohesive dentine failure. Radiotherapy after root canal obturation and post luting adversely affected the adhesiveness of resin cement to intraradicular dentine. Teeth irradiated before root canal treatment and after placement of calcium hydroxide had the best performance.
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Affiliation(s)
- Patrícia da Agostim Cancelier
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Renata Gondo Machado
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
| | - Júlia Menezes Savaris
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Eduardo Antunes Bortoluzzi
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
- Department of Diagnosis & Oral Health, Endodontics Division, University of Louisville, Louisville, Kentucky, USA
| | - Cleonice da Silveira Teixeira
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | | | - Paulo Marcelo Rodrigues
- Department of Radiotherapy, Oncology Research Centre (CEPON), Florianópolis, Santa Catarina, Brazil
| | - Vicente Ribeiro Netto
- Department of Radiotherapy, Oncology Research Centre (CEPON), Florianópolis, Santa Catarina, Brazil
| | | | - Lucas da Fonseca Roberti Garcia
- Department of Dentistry, Endodontics Division, Health Sciences Centre, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
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Escobar PM, Silva-Sousa AC, Camargo RVD, Simões-Carvalho M, Silva-Sousa YT, Mazzi-Chaves JF, DE-Deus G, Sousa-Neto MD. Influence of bioceramic intracanal medication on the bond strength of bioceramic root canal sealer. Braz Oral Res 2023; 37:e056. [PMID: 37255076 DOI: 10.1590/1807-3107bor-2023.vol37.0056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/20/2022] [Indexed: 06/01/2023] Open
Abstract
To investigate the influence of the remaining volume of a new intracanal medication based on bioceramic compounds on the bond strength (BS) and formation of an adhesive interface between calcium silicate-based and epoxy resin-based root canal sealers. For this purpose, the specimens were distributed according to the intracanal medication (n = 26): Bio-C Temp (BCT) and Ultracal XS (UXS). The roots were scanned in microCT, and after 7 days, the medication was removed. Then a new scan was performed to evaluate the volume of medication remaining. Subsequently, 40 specimens were redistributed into 2 subgroups (n = 10) and filled according to the sealer used: AH Plus (AHP) and Bio-C Sealer (BCS), to assess the bond strength by using the push-out test, and the adhesive interface by confocal laser fluorescence microscopy (CLSM) and scanning electron microscopy (SEM). The t test showed a smaller remainder of BCT (1.77 ± 0.86) compared with UXS (10.47 ± 5.78), irrespective of the root third evaluated. The BS showed that teeth with BCT + BCS had higher bond strength values (3.70 ± 1.22) when compared to the other groups: BCT + AHP (2.15 ± 1.07), UXS + BCS (3.18 ± 1.09) and UXS + AHP (2.11 ± 1.02) (p<0.001). The cervical third had higher BS when compared with the middle and apical thirds (p < 0.001), and higher number of adhesive failures. The adhesive interface in SEM and CLSM images showed better adaptation for the association between BCT + BCS. Intracanal medication and silicate-based endodontic sealer appeared to interact chemically by forming a biomineralizing layer, allowing for an increase in the bond strength and forming an adhesive interface between the materials, with no or less gap formation.
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Affiliation(s)
- Patrícia Maria Escobar
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Alice Corrêa Silva-Sousa
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Rafael Verardino de Camargo
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Marco Simões-Carvalho
- Universidade Federal Fluminense - UFF, School of Dentistry, Department of Endodontics, Niterói, RJ, Brazil
| | | | - Jardel Francisco Mazzi-Chaves
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Gustavo DE-Deus
- Universidade Federal Fluminense - UFF, School of Dentistry, Department of Endodontics, Niterói, RJ, Brazil
| | - Manoel Damião Sousa-Neto
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
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Effect of root perforation repair with mineral aggregate-based cements on the retention of customized fiberglass posts. Odontology 2022; 110:535-544. [PMID: 35044577 DOI: 10.1007/s10266-022-00686-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 01/03/2022] [Indexed: 12/31/2022]
Abstract
The purpose of this study was to investigate whether the root perforation repair with mineral aggregate-based cements affects the retention of customized fiberglass posts to bovine intraradicular dentin. Sixty-four bovine mandibular incisors had their root canals endodontically treated and prepared for fiberglass posts luting. Teeth were randomly distributed into four groups (n = 16), according to the cement used for the perforations repair (MTA HP; calcium aluminate cement-CAC; and CAC + calcium carbonate nanoparticles-nano-CaCO3) and control group (no perforation). The groups were redistributed according to the fiberglass posts luting protocol (n = 8): total-etching (TE) (MTA HP/TE; CAC/TE; CAC + CaCO3/TE and control/TE) and self-etching (SE) (MTA HP/SE; CAC/SE; CAC + CaCO3/SE and control/SE). Roots were sectioned into 1.3 mm-thick dentin slices obtaining samples that were submitted to the push-out test in Universal Testing Machine (Instron, Model 4444-0.5 mm/min). The fractured samples were analyzed under stereomicroscope and Scanning Electron Microscope (SEM). CAC/TE and CAC/SE groups had significant difference between the cervical and middle thirds (p < 0.05). When the root thirds were not considered, CAC/SE had the lowest bond strength and differed statistically from CAC/TE and CAC + CaCO3/TE groups, which had the highest mean bond strength values (p < 0.05). The root perforations repair did not affect the bond strength of resin cement/customized fiberglass posts to bovine dentin. The increase in bond strength is luting protocol dependent.
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de Carvalho KKT, Petean IBF, Silva-Sousa AC, de Camargo R, Mazzi-Chaves JF, Silva-Sousa YTC, Sousa-Neto MD. Evaluation of rotary instruments with whipping motion in the biomechanical preparation of large root canals of young permanent teeth. AUST ENDOD J 2022; 49:130-139. [PMID: 35649116 DOI: 10.1111/aej.12633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 04/05/2022] [Accepted: 05/16/2022] [Indexed: 11/30/2022]
Abstract
Shaping ability evaluation of taper ./01 instruments in large root canals, by microcomputed tomography (micro-CT) and scanning electron microscopy (SEM). Maxillary central incisors with large diameter root canals were divided into two groups (n = 10): XP-Endo Shaper (FKG-Dentaire, Switzerland) and manual instrumentation (FKG-Dentaire). Two- and three-dimensional parameters from cervical to apical root thirds were evaluated by micro-CT. Apical stop was evaluated by SEM images. Data were analysed by ANOVA and Tukey tests (α = 5%). XP-Endo Shaper allowed a regular biomechanical preparation with less dentinal wear compared with manual instrumentation, which showed excessive wear of the thin root canal walls (p < 0.05). Roundness and SMI showed similarity between both protocols (p > 0.05). XP-Endo Shaper SEM showed a regular and well-defined shape of the apical foramen suggesting the formation of the apical stop. Reduced diameter and taper instruments promoted a conservative wear and a well-defined apical stop formation in large root canals.
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Affiliation(s)
| | - Igor Bassi Ferreira Petean
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Alice Corrêa Silva-Sousa
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Rafael de Camargo
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | | | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
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11
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Bertolini GR, Alves dos Santos GN, Garcia de Paula FW, Silva-Sousa AC, Roperto R, Sousa-Neto MD, Lopes-Olhê FC. Impact of the removal of filling material from the post space with ultrasonic insert and magnification with a surgical microscope on the bond strength and adhesive interface of multifilament fiberglass posts onto flat-oval root canals. J Mech Behav Biomed Mater 2022; 132:105264. [DOI: 10.1016/j.jmbbm.2022.105264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/28/2022] [Accepted: 05/01/2022] [Indexed: 11/29/2022]
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12
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CARVALHO KKT, PETEAN IBF, SILVA-SOUSA AC, CAMARGO RV, MAZZI-CHAVES JF, SILVA-SOUSA YTC, SOUSA-NETO MD. Heat-treated NiTi instruments and final irrigation protocols for biomechanical preparation of flattened canals. Braz Oral Res 2022; 36:e115. [DOI: 10.1590/1807-3107bor-2022.vol36.0115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/02/2022] [Indexed: 11/22/2022] Open
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Escobar PM, Lopes FC, Carvalho K, Fretes V, Hadid GG, Mazzi-Chaves JF, Sousa-Neto MD. Influence of different calcium hydroxide removal protocols on the bond strength of epoxy resin-based sealer in long oval root canals. Microsc Res Tech 2021; 85:781-788. [PMID: 34564917 DOI: 10.1002/jemt.23949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 08/25/2021] [Accepted: 09/16/2021] [Indexed: 11/06/2022]
Abstract
This study evaluated the effect of different protocols for Ca(OH)2 removal on the bond strength (BS) of epoxy resin-based sealer in long oval root canals. Forty-eight mandibular incisors with long oval root canals were selected by CBCT. Biomechanical preparation was performed, the samples were filled with Ca(OH)2 paste and distributed in four groups (n = 12): G-without Ca(OH)2 paste (C); G2-syringe/needle (SN); G3-SN + XP-Endo® Finisher (XPF); G4-SN + passive ultrasonic irrigation (PUI). After 7 days, Ca(OH)2 was removed and teeth were filled using AHPlus and guttapercha. In four samples from each group, the sealer was manipulated with 0.1% rhodamine to assess sealer penetration by fluorescent laser confocal microscopy (FLCM). Samples were sectioned in slices for BS, scanning electron microscopy, and FLCM analysis. The BS data were analyzed by ANOVA and Tukey tests (α = 0.05). The lowest BS values were found for the SN group (12.89 ± 4.36) compared to C (35.55 ± 10.05), while PUI group presented intermediate values (28.57 ± 9.35) and the XPF group (31.34 ± 9.8) showed values that were sometimes similar to C group and sometimes similar to PUI group (p > .05). The analysis of the adhesive interface showed evident gaps, with the presence of residues between the dentin and the filling material for the SN group, and for C, XPF and PUI groups juxtaposed adhesive interface. FLCM images showed sealer penetration in the dentinal tubules along the entire perimeter for C, XPF, and PUI groups. Ca(OH)2 removal with XPF and PUI from long oval root canals resulted in higher bond strength values compared to SN, besides better sealer penetration on dentinal tubules and juxtaposed adhesive interface.
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Affiliation(s)
- Patrícia Maria Escobar
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
| | - Fabiane Carneiro Lopes
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
| | - Kleber Carvalho
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
| | - Vicente Fretes
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
| | - Gabriela Gavilán Hadid
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo-USP, Ribeirão Preto, Brazil
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Liu H, Lai WWM, Hieawy A, Gao Y, von Bergmann H, Haapasalo M, Tay FR, Shen Y. Micro-computed Tomographic Evaluation of the Quality of Root Canal Fillings in Mandibular Molars after Obturation for 54 Months. J Endod 2021; 47:1783-1789. [PMID: 34492231 DOI: 10.1016/j.joen.2021.08.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 02/07/2023]
Abstract
INTRODUCTION The present study evaluated the percentage volume of voids in root canals of mandibular molars that had been obturated for 54 months. METHODS Thirty extracted human mandibular molars were instrumented and debrided. The teeth were assigned to 3 groups (n = 10) according to the filling technique and sealer used: the single-cone technique using AH Plus sealer (AHS; Dentsply Sirona Endodontics, Tulsa, OK) or EndoSequence BC sealer (BCS; Brasseler USA Dental LLC, Savannah, GA) and the warm vertical compaction technique using AH Plus sealer (AHW). The specimens were stored at 37°C and 100% humidity. Micro-computed tomographic imaging was used to scan each specimen 1 day 54 months after obturation. Data were analyzed using 1-way analysis of variance and the paired t test. RESULTS The percentage volume of voids in the teeth 1 day after obturation in the AHS group was higher than in the BCS group and the AHW group (P < .05). After 54 months, the proportion of voids decreased in all groups (P < .05). No significant difference was observed between the AHS group and the BCS group after 54 months. Teeth in the AHW group contained fewer voids than the AHS group (P < .05). CONCLUSIONS Voids in root canal filling were reduced 54 months after obturation. The warm vertical compaction technique achieved better root canal filling quality in mandibular molars than the single-cone technique when using AHS after long-term storage at 100% humidity.
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Affiliation(s)
- He Liu
- Department of Stomatology, Affiliated Hospital of Jining Medical University, Jining, China; Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Wendy Wing Man Lai
- Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Ahmed Hieawy
- Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Yuan Gao
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Sichuan, China
| | - HsingChi von Bergmann
- Dental Education Research Lab, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Markus Haapasalo
- Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - Franklin R Tay
- Department of Endodontics, The Dental College of Georgia, Augusta University, Augusta, Georgia.
| | - Ya Shen
- Division of Endodontics, Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada.
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Dentinal Microcracks Induced by Endodontic Procedures: Suggested Design for Experimental Studies Using Micro-Computed Tomography and Strain Gauges. J Endod 2021; 47:1157-1165. [PMID: 33901544 DOI: 10.1016/j.joen.2021.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/17/2021] [Accepted: 04/14/2021] [Indexed: 10/21/2022]
Abstract
INTRODUCTION The present study aimed to describe an in vitro study model to investigate root surface strain (RSS) and its correlation with the initiation/propagation of microcracks during different endodontic procedures. METHODS Four lower human incisors extracted microcrack free were selected by micro-computed tomographic imaging. Two strain gauges were bonded to the root surface of each incisor. Then, the teeth were prepared to reproduce the periodontal ligament artificially. The gauges were attached to a data acquisition system. The RSS was recorded during the entire endodontic procedure, which consisted of accessing the endodontic cavity, cleaning, shaping preparation with an Mtwo rotary system (VDW, Munich, Germany), and filling with a standardized technique. Each incisor was submitted to a different retreatment protocol and supplementary cleaning method as follows: (1) Reciproc (RC, VDW) + Flatsonic (FS; Helse, Santa Rosa de Viterbo, Brazil), (2) RC + XP-endo Finisher (XPF; FKG Dentaire, La Chaux-de-Fonds, Switzerland), (3) Mtwo retreatment (MR) + FS, and (4) MR + XPF. Finally, the teeth were rescanned to establish the postoperative microcrack formation by 2 well-trained and blinded examiners. RESULTS The maximum and minimum RSS values were -120 and 510 microstrains, respectively, for all of the files. RC showed the highest RSS values during endodontic retreatment compared with MR. FS demonstrated a higher variation between the minimum and maximum RSS than XPF. No microcracks were observed in the specimens. CONCLUSIONS This preliminary study proposed an experimental model that would combine 2 methods to evaluate the effects of endodontic systems on dentin. Although strain gauges would provide data on the stresses created, the pre- and postoperative evaluation of micro-computed tomographic images would enable microcrack formation to be determined.
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Cerqueira NM, Louzada VG, Silva-Sousa YTC, Raucci-Neto W, Leoni GB. Effect of canal preparation with XP-endo Shaper and ProTaper Next on root canal geometry and dentin thickness of mandibular premolars with radicular grooves and two canals: a micro-CT study. Clin Oral Investig 2021; 25:5505-5512. [PMID: 33655437 DOI: 10.1007/s00784-021-03858-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/22/2021] [Indexed: 12/20/2022]
Abstract
OBJECTIVES This study aimed to evaluate the effects of different shaping protocols on the root canal geometry and remaining dentin thickness of mandibular premolars with radicular grooves (RG) and two canals by means of micro-CT. MATERIALS AND METHODS Mandibular premolars with RG and two canals were matched based on their similar morphological dimensions and assigned to 2 experimental groups according to the canal preparation (n=8): XP-endo Shaper (XPS) and ProTaper Next (PTN) systems. Before and after preparation, morphometric measurements of the volume, surface area, structure model index, area, perimeter, roundness, major and minor diameters, as well as untouched canal walls, canal transportation, and dentin wall thickness were evaluated. Data were statistically compared within and between groups using the independent sample t test (α=5%). RESULTS XPS revealed less changes in volume, surface area, area, perimeter, and major and minor diameters (P<0.05). There was no significant difference in structure model index (SMI), roundness, and percentage of untouched canal walls between groups (P>0.05). XPS resulted in less apical canal transportation and a higher remaining dentin thickness toward the RG compared to PTN in lingual canals (P<0.05). CONCLUSIONS XPS revealed fewer changes in root canal geometry as well as lower transportation and a greater remaining dentin thickness in the lingual canals toward the RG compared to PTN. CLINICAL RELEVANCE Internal and external anatomical characteristics of mandibular premolars might have an influence on biomechanical preparation. Considering the risk of perforation, the canal preparation using XPS appears to be more conservative compared to PTN.
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Affiliation(s)
- Nathália Mancioppi Cerqueira
- School of Dentistry, University of Ribeirão Preto, Avenida Costábile Romano 2201, Ribeirão Preto, SP, 14096-900, Brazil
| | - Victoria Gabriela Louzada
- School of Dentistry, University of Ribeirão Preto, Avenida Costábile Romano 2201, Ribeirão Preto, SP, 14096-900, Brazil
| | | | - Walter Raucci-Neto
- School of Dentistry, University of Ribeirão Preto, Avenida Costábile Romano 2201, Ribeirão Preto, SP, 14096-900, Brazil
| | - Graziela Bianchi Leoni
- School of Dentistry, University of Ribeirão Preto, Avenida Costábile Romano 2201, Ribeirão Preto, SP, 14096-900, Brazil.
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Uzunoglu-Özyürek E, Askerbeyli-Örs S, Türker SA. Evaluation of the amount of remained sealer in the dentinal tubules following re-treatment with and without solvent. J Conserv Dent 2021; 23:407-411. [PMID: 33623245 PMCID: PMC7883780 DOI: 10.4103/jcd.jcd_445_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/25/2020] [Accepted: 09/29/2020] [Indexed: 11/09/2022] Open
Abstract
Background: The effect of solvent and sealer type (BioRoot RCS [BRRCS], mineral trioxide aggregate [MTA] Fillapex, and AH26) on the root canal residues was evaluated by confocal laser scanning microscopy (CLSM). Materials and Methods: Distal root canals of 60 mandibular molars prepared up to ProTaper-F4 were filled using one of the sealers labeled with 0.1% rhodamine-B (n = 20 per sealer). Samples were divided into two according to reprocessing methods as follows: ProTaper Universal Reprocessing System (PTUR) or solvent plus PTUR. Samples were sectioned at 2–5 and 8 mm from the apex and the samples were observed under CLSM. Penetration depth, percent penetration depth, and percent penetration into canal walls were evaluated. Statistical analysis was performed using the repeated measures of the two-way ANOVA and Bonferroni post hoc test at P = 0.05. Results: The highest penetration depth was measured in BRRCS in all root canal thirds with or without chloroform addition. Percentage of penetration depth values of MTA Fillapex and BRRCS was statistically similar and higher than AH26 in all sections, except the apical section re-treated with the addition of chloroform. Conclusion: None of the sealers were completely removed. The type of sealant and the use of chloroform changed the amount of sealant remaining in the root canal system.
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Affiliation(s)
- Emel Uzunoglu-Özyürek
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Sevinc Askerbeyli-Örs
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Sevinç Aktemur Türker
- Department of Endodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey
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Santos-Junior AO, Tanomaru-Filho M, Pinto JC, Tavares KIMC, Torres FFE, Guerreiro-Tanomaru JM. Effect of obturation technique using a new bioceramic sealer on the presence of voids in flattened root canals. Braz Oral Res 2021; 35:e028. [PMID: 33605358 DOI: 10.1590/1807-3107bor-2021.vol35.0028] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 11/19/2020] [Indexed: 12/24/2022] Open
Abstract
The aim of this study was to evaluate the filling ability of a new ready-to-use calcium silicate-based sealer using thermoplastic or single-cone technique in flattened root canals. Twenty-four flattened distal canals of mandibular molars with a buccolingual diameter 4 or more times larger than the mesiodistal diameter were selected. The root canals were prepared and filled (n = 12), according to the following techniques: thermoplastic or single-cone technique using Bio-C Sealer. The teeth were scanned using Skycan 1176 micro-computed tomography (micro-CT) - voxel size 8.74 µm, before and after filling the root canal. The percentage of voids in the filled root canals was evaluated, and the data were statistically analyzed using the unpaired t-test (α = 0.05). The root canals filled using the thermoplastic technique created a smaller percentage of voids in the cervical/middle thirds than those filled using the single-cone technique (p < 0.05). There was no difference in the percentage of voids using either technique in the apical third (p > 0.05). The flattened root canals in the cervical/middle thirds were better filled using the ready-to-use calcium silicate-based sealer associated to the thermoplastic technique, compared with the single-cone technique. In the apical third, the techniques showed similar filling ability.
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Affiliation(s)
- Airton Oliveira Santos-Junior
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
| | - Mário Tanomaru-Filho
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
| | - Jáder Camilo Pinto
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
| | | | - Fernanda Ferrari Esteves Torres
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
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Assis RS, Lopes FC, Roperto R, Silva Sousa YTC, Brazão EH, Spazzin AO, Pereira GKR, Alves DM, Saquy PC, Sousa-Neto MD. Bond strength and quality of bond interface of multifilament fiberglass posts luted onto flat-oval root canals without additional dentin wear after biomechanical preparation. J Prosthet Dent 2020; 124:738.e1-738.e8. [PMID: 32694019 DOI: 10.1016/j.prosdent.2020.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 10/23/2022]
Abstract
STATEMENT OF PROBLEM An intraradicular retainer formed by multiple independent glass fiber filaments was developed aiming to allow better adaptation in flattened root canals; however, the performance of the new posts is unclear. PURPOSE The purpose of this in vitro study was to compare the bond strength (BS) and adhesive interface quality achieved in flattened root canals restored with conventional glass fiber posts (CFPs) and multifilament glass fiber posts (MFPs). MATERIAL AND METHODS The distal roots of mandibular molars with long oval root canals were endodontically treated, and the obturation material was removed and assigned to 2 groups (n=11) according to the type of retainer used: CFP (WhitePostDC#0.5; FGM) or MFP (CometTail#4; Synca). The posts were cemented with self-adhesive resin cement. The specimens were sectioned (2 slices per third). The most cervical slice in each third was used to evaluate the BS, while the adhesive interface in the apical slices was analyzed by scanning electron microscopy. BS data were analyzed by using a multilevel generalized linear model, and adhesive interface SEM data were analyzed by using a multilevel ordinal logistic regression model (α=.05). RESULTS Multilevel regression showed a statistically significant difference for the "type of retainer" factor (P=.001; CFP 2.61 ±1.30>MFP 1.59 ±1.54). No statistically significant differences were found for the "root thirds" factor (P=.346) or for the interaction of both factors (P=.114). The failure pattern was predominantly mixed or adhesive for CFP and adhesive to dentin for MFP. A better adaptation of the restorative material was observed in the cervical third for CFP and in the apical third for MFP (P<.001). CONCLUSIONS MFP resulted in lower BS values than CFP, with a higher prevalence of adhesive failures to dentin and better adaptation of the adhesive interface in the apical third.
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Affiliation(s)
- Rafael S Assis
- Postgraduate student, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Fabiane Carneiro Lopes
- Postgraduate student, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Renato Roperto
- Professor, Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio
| | | | - Elisabeth Helena Brazão
- Postgraduate student, School of Dentistry, University of Ribeirão Preto (UNAERP), Ribeirão Preto, SP, Brazil
| | - Aloísio O Spazzin
- Professor, School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | - Gabriel K R Pereira
- Professor, School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | - Daniela Meira Alves
- Postgraduate student, School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | - Paulo César Saquy
- Professor, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Manoel Damião Sousa-Neto
- Professor, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil.
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Li J, Bergeron BE, Chao J, Xu T, Tay FR, Fan B. Micro-computed tomography evaluation of root canal filling quality with apical negative pressure. J Dent 2020; 100:103431. [PMID: 32682921 DOI: 10.1016/j.jdent.2020.103431] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES The objective of the present study was to compare, using micro-computed tomography (micro-CT), the location and volume percentage of voids in root canals that were obturated with a premixed tricalcium silicate sealer and a single gutta-percha master cone, in the presence or absence of apical negative pressure. METHODS Twenty extracted human mandibular premolars were cleaned and shaped. The teeth were assigned to 2 groups (n = 10) according to the filling technique: apical negative pressure sealer application combined with the single-cone technique (NPS) or syringe-assisted sealer application combined with the single-cone technique (SS). Each specimen was scanned using micro-CT at 10 μm resolution. The percentages of voids were calculated from segmental regions of interest. Data were analysed using nonparametric statistical methods, with statistical significance pre-set at α = 0.05. RESULTS Significant difference was identified (p < 0.05) in the overall percentage of voids between the NPS group (0.33 %; interquartile range 0.25 %) and the SS group (6.29 %; interquartile range 5.57 %). In the NPS group, the percentages of voids in the coronal-third or middle-third of the canal space were statistically lower than that in apical-third (p < 0.0167, Bonferroni adjustment), with no significant difference between the former two groups. In the SS group, no significant difference in the percentages of voids was identified among the coronal-third, middle-third and apical-third of the canal space. CONCLUSIONS Apical negative pressure sealer application combined with the single-cone technique produces fewer voids in root canal fillings than the conventional single-cone technique. CLINICAL SIGNIFICANCE The apical negative pressure sealer application technique combined with single-cone filling constitutes a novel root canal obturation technique that improves the quality of root canal filling by minimising the volume of voids within the three-dimensional canal space.
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Affiliation(s)
- Jinxia Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Brian E Bergeron
- The Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Jing Chao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Ting Xu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Franklin R Tay
- The Dental College of Georgia, Augusta University, Augusta, GA, USA.
| | - Bing Fan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.
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21
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Sousa-Neto MD, Crozeta BM, Lopes FC, Mazzi-Chaves JF, Pereira RD, Silva-Sousa AC, Amaral MCDA, Steier L, Jacobs R, Silva-Sousa YTC. A micro-CT evaluation of the performance of rotary and reciprocating single-file systems in shaping ability of curved root canals. Braz Oral Res 2020; 34:e039. [PMID: 32374813 DOI: 10.1590/1807-3107bor-2020.vol34.0039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 03/23/2020] [Indexed: 11/22/2022] Open
Abstract
To compare the shaping ability of different single-file systems in the preparation of mesial curved canals of mandibular molars using micro-CT technology. Fifteen mesial roots of mandibular molars with two independent and curved canals (n = 30) were selected, scanned at a resolution of 26.7 μm anatomically matched, and distributed into three groups (n = 10), according to the preparation system: WaveOne 25.08, Reciproc 25.08, and OneShape 25.06. A final micro-CT scanning was performed, data sets were registered with their respective counterparts, and compared regarding the three-dimensional (volume, surface area, and structure model index - SMI) and two-dimensional (perimeter, area, roundness, major and minor diameters) parameters, as well as, canal transportation, using ANOVA and post hoc Tukey tests (α = 5%). Overall, no difference was observed between groups regarding area, perimeter, volume, surface area, and canal transportation (p > 0.05). Within group, no canal transportation was significantly higherobserved in the apical third (0.10 ± 0.05 mm) compared to coronal (0.08±0.040 mm) and middle (0.07 ± 0.03 mm) thirds (p < 0.05). Structure model index (SMI) was statistically higher after preparation with OneShape instrument (0.36 ± 0.26) compared to other systems (p < 0.05). Within the parameters of this study, similar shaping ability was observed in the preparation of mesial curved root canals of mandibular molars with Reciproc, OneShape and WaveOne systems.
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Affiliation(s)
- Manoel Damião Sousa-Neto
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto , Department of Restorative Dentistry , Ribeirão Preto , SP , Brazil
| | - Bruno Monguilhott Crozeta
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto , Department of Restorative Dentistry , Ribeirão Preto , SP , Brazil
| | - Fabiane Carneiro Lopes
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto , Department of Restorative Dentistry , Ribeirão Preto , SP , Brazil
| | - Jardel Francisco Mazzi-Chaves
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto , Department of Restorative Dentistry , Ribeirão Preto , SP , Brazil
| | - Rodrigo Dantas Pereira
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto , Department of Restorative Dentistry , Ribeirão Preto , SP , Brazil
| | - Alice Corrêa Silva-Sousa
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto , Department of Restorative Dentistry , Ribeirão Preto , SP , Brazil
| | | | - Liviu Steier
- University of Pennsylvania - UPenn, School of Dental Medicine , Philadelphia , PA , USA
| | - Reinhilde Jacobs
- Katholieke Universiteit Leuven - KU Leuven, Faculty of Medicine , Department of Imaging and Pathology , Leuven , Belgium
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Rosatto CMPD, Oliveira LV, Ferraz DC, Soares PBF, Soares CJ, Moura CCG. Apical Displacement and Residual Root Canal Filling with Single-Cone After Post Space Preparation: A Micro-CT Analysis. Braz Dent J 2020; 31:25-31. [PMID: 32159701 DOI: 10.1590/0103-6440202002597] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 10/11/2019] [Indexed: 12/31/2022] Open
Abstract
The purpose of this study was to evaluate the presence of residues after post space preparation (PSP) and establish whether the apical displacement of the gutta-percha was affected by the moments and methods of PSP in teeth filled by the single-cone technique. The root canals of 20 bovine incisor teeth were instrumented with Reciproc and filled with single-cone and AH Plus. The specimens were divided into 4 groups according to the moment and method of PSP (n=5): immediate with drill, immediate with thermoplasticizer, delayed with drill and delayed with thermoplasticizer. Micro-CT scans were performed before and after the PSP for residues of the root canal filling (1) and analysis of apical displacement (2). Data were analyzed by using 2-way repeated measurement ANOVA (1) and 2-way ANOVA (2) followed by the Tukey's test (a=0.05). Significance effect on the residues percentage remaining for methods (p=0.044), for moments (p=0.006), for thirds repetition (p<0.001), and for interaction between methods and thirds (p<0.001), and moments and thirds (p=0.044). Significance effect on the apical displacement of root canal filing was detected for methods (p=0.008), however no difference was found between moments (p=0.617). In general, PSP using drill resulted in more homogeneous root canal preparation, mainly when made immediately. For all other combinations between methods and moments for PSP, the middle and apical thirds presented significant higher residues remaining. Thermo method performed in both moments and the drill method performed immediately had displacement in the apical direction, representing extrusion of the root filling material.
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Affiliation(s)
- Camila Maria Peres de Rosatto
- Department of Endodontics, Dental School, Federal University of Uberlândia, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Lilian Vieira Oliveira
- Department of Endodontics, Dental School, Federal University of Uberlândia, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Danilo Cassiano Ferraz
- Department of Endodontics, Dental School, Federal University of Uberlândia, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Priscilla Barbosa Ferreira Soares
- Department of Periodontology and Implanotology, Dental School, Federal University of Uberlândia, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Carlos José Soares
- Department of Operative Dentistryand Dental Materials, Dental School, Federal University of UberlândiaUFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | - Camilla Christian Gomes Moura
- Department of Endodontics, Dental School, Federal University of Uberlândia, UFU - Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
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Lopes FC, Roperto R, Akkus A, de Queiroz AM, Francisco de Oliveira H, Sousa-Neto MD. Effect of carbodiimide and chlorhexidine on the bond strength longevity of resin cement to root dentine after radiation therapy. Int Endod J 2019; 53:539-552. [PMID: 31715008 DOI: 10.1111/iej.13252] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 11/11/2019] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the effect of carbodiimide (EDC) and chlorhexidine (CHX) on the bond strength (BS) of resin cement to root dentine of teeth submitted to radiotherapy. METHODOLOGY One hundred and twenty extracted maxillary canines were selected and assigned to 2 groups (n = 60): nonirradiated and irradiated (30 cycles of 2 Gy, total 60 Gy). Roots lengths were standardized, and canals were prepared and filled. Post spaces were then prepared, and the samples were redistributed according to dentine treatment (n = 20): saline solution (SF); CHX 2%; or EDC 0.5M. After drying the post space, fibreglass posts were cemented. Cross-sectioned slices were obtained, and in half of the specimens of each subgroup (n = 10), the analysis was performed immediately; the others (n = 10) were stored for 10 months before analyses. The most cervical slice of each third was subjected to a push-out test and failure pattern analysis (n = 10), and the most apical slice submitted to the analysis of the adhesive interface by SEM (n = 5). The bond strength data were submitted to anova and Tukey tests, the adhesive interface adaptation was submitted to Kruskal-Wallis and Dunn's tests, and the Chi-square test was used to evaluate the type of failure. RESULTS The irradiated specimens had significantly lower bond strength (13.8 ± 4.3) than the nonirradiated (18.1 ± 3.1; P < 0.001). For the irradiated teeth, the bond strengths were significantly lower in the SF and CHX groups (P < 0.001). Also, the bond strengths reduced significantly after 10 months in the SF and CHX groups (P < 0.001). Cohesive failures occurred in dentine for irradiated specimens. Poorer interface adaptation, dentine fractures and microfractures were observed in irradiated specimens, and better adaptation was observed for specimens after EDC treatment. CONCLUSIONS Radiotherapy was associated with lower bond strength and worse interface adaptation. Dentine treatment with EDC contributed to adhesive interface longevity during the cementation of glass fibre posts in nonirradiated and irradiated teeth.
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Affiliation(s)
- F C Lopes
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - R Roperto
- Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - A Akkus
- Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University, Cleveland, OH, USA.,Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - A M de Queiroz
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - H Francisco de Oliveira
- Department of Internal Medicine, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - M D Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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Borges CC, Palma-Dibb RG, Rodrigues FCC, Plotegher F, Rossi-Fedele G, de Sousa-Neto MD, Souza-Gabriel AE. The Effect of Diode and Er,Cr:YSGG Lasers on the Bond Strength of Fiber Posts. Photobiomodul Photomed Laser Surg 2019; 38:66-74. [PMID: 31393231 DOI: 10.1089/photob.2019.4668] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background: Laser irradiation modifies the topography and composition of dentin surface aiming to increase the retention of bonded posts. Objective: To assess the effect of dentin irradiation with Er,Cr:YSGG or diode lasers on the bond strength of fiber posts using self-adhesive resin cement. Materials and methods: Sixty bovine root canals were root-canal treated, post spaces were prepared, and subsequently fiber posts were cemented. The samples were distributed according to the surface treatment: distilled water (control), Er,Cr:YSGG (1.5 W, 20 sec), or diode (1.5 W, 20 sec) lasers. Bond strengths were assessed by pull-out (n = 10) or push-out testing (n = 10). Pearson's correlation was calculated. Failure mode after testing and the depth of tags in the dentinal tubules were analyzed by confocal laser microscopy. Data were submitted to analysis of variance and Tukey's test. A p < 0.05 was considered significant. Results: In the push-out test, Er,Cr:YSGG laser had significantly different higher values (5.43 ± 0.10 MPa) compared to the control (4.79 ± 0.05 MPa). Diode laser values were not significantly different from the other groups (5.12 ± 0.27 MPa). In the pull-out test, there were no significant differences between Er,Cr:YSGG (6.86 ± 2.16 MPa) and diode (8.43 ± 1.77 MPa) lasers, and both had significant differences compared to the control (4.18 ± 1.29 MPa). No correlation was found. Adhesive failures were predominant in all groups, and no significant differences in tag penetration among the groups were found. Conclusions: The Er,Cr:YSGG laser increases the bond strength of resin cement and fiber post to dentin in both tests, compared to control group without laser treatment. Diode laser only enhanced bonding for pull-out test.
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Affiliation(s)
- Caroline Cristina Borges
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Regina Guenka Palma-Dibb
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Flávia Cássia Cabral Rodrigues
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernanda Plotegher
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Manoel Damião de Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
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25
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Long W, Li J, Liu Y, Jiang H. Effect of obturation technique with immediate and delayed post space preparation on apical voids and bond strength of apical gutta-percha. J Int Med Res 2018; 47:470-480. [PMID: 30514145 PMCID: PMC6384497 DOI: 10.1177/0300060518814604] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Objective The purpose of this study was to evaluate the effect of immediate and delayed post space preparation on the sealing ability of two root canal obturation techniques by using micro-computed tomography imaging and a push-out test. Methods The root canals of 40 human maxillary premolar teeth were instrumented and divided into four groups: (A) single cone (SC) followed by immediate post space preparation, (B) continuous wave of condensation (CWC) followed by immediate post space preparation, (C) SC followed by delayed post space preparation, and (D) CWC followed by delayed post space preparation. Micro-CT scans were performed for volumetric analysis of voids and filling materials in the apical 4-mm portion. A push-out test was performed, and failure modes (adhesive, cohesive, or mixed) were assessed. Data were analyzed using the Kruskal-Wallis test and one-way analysis of variance. Results No significant differences were observed among the four groups in terms of the percentage volume of voids of the apical 4 mm or the bond strength of apical gutta-percha. Conclusions The percentage volume of voids and bond strength of apical gutta-percha were similar and were not significantly influenced by the timing of post space preparation or the obturation technique.
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Affiliation(s)
- Weilin Long
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Jing Li
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Yiwen Liu
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
| | - Hongwei Jiang
- Department of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China
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Sousa-Neto MDD, Silva-Sousa YC, Mazzi-Chaves JF, Carvalho KKT, Barbosa AFS, Versiani MA, Jacobs R, Leoni GB. Root canal preparation using micro-computed tomography analysis: a literature review. Braz Oral Res 2018; 32:e66. [DOI: 10.1590/1807-3107bor-2018.vol32.0066] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/06/2018] [Indexed: 11/21/2022] Open
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Brichko J, Burrow MF, Parashos P. Design Variability of the Push-out Bond Test in Endodontic Research: A Systematic Review. J Endod 2018; 44:1237-1245. [PMID: 29935874 DOI: 10.1016/j.joen.2018.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 04/04/2018] [Accepted: 05/06/2018] [Indexed: 10/28/2022]
Abstract
INTRODUCTION There is limited literature on the impact of testing variables on the push-out bond test (POBT). This review identified designs of the POBT used in the endodontic literature and aimed to determine which experimental variables may influence the push-out bond strength (POBS). METHODS A systematic review based on PRISMA guidelines was performed by searching the PubMed, SCOPUS, and Cochrane library databases using terms including push-out and dislocation resistance and descriptions of endodontic materials. Test variables assessed included method of root preparation, timing of sectioning compared with filling, thickness, diameter and taper of sections, and plunger size and velocity. The POBS of 3 common materials (gutta-percha and AH Plus, mineral trioxide aggregate, and Biodentine) were collected from investigations, and a comparison was attempted. RESULTS One hundred thirty-three studies assessed the POBS of root-filling materials, 68 assessed root repair cements/root-end filling materials, and 16 assessed orifice barrier materials other than mineral trioxide aggregate. There was significant variation in all of the assessed variables, resulting in a large range of reported values for the POBS of the various materials. Because of this heterogeneity in study design, no further statistical analysis of the impact of the test variables on POBS was possible. CONCLUSIONS There was considerable variation in the POBT design used in endodontic research. Greater standardization is required for future research as well as accurate reporting for all test variables to assess the impact of specific design variables on POBS.
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Affiliation(s)
- James Brichko
- Melbourne Dental School, University of Melbourne, Melbourne, Victoria, Australia
| | - Michael F Burrow
- Melbourne Dental School, University of Melbourne, Melbourne, Victoria, Australia
| | - Peter Parashos
- Melbourne Dental School, University of Melbourne, Melbourne, Victoria, Australia.
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Tedesco M, Chain MC, Bortoluzzi EA, da Fonseca Roberti Garcia L, Alves AMH, Teixeira CS. Comparison of two observational methods, scanning electron and confocal laser scanning microscopies, in the adhesive interface analysis of endodontic sealers to root dentine. Clin Oral Investig 2018; 22:2353-2361. [DOI: 10.1007/s00784-018-2336-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 01/04/2018] [Indexed: 10/18/2022]
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Franceschini K, Silva-Sousa YTC, Lopes FC, Pereira RD, Palma-Dibb RG, de Sousa-Neto MD. Bond strength of epoxy resin-based root canal sealer to human root dentin irradiated with Er,Cr:YSGG laser. Lasers Surg Med 2016; 48:985-994. [DOI: 10.1002/lsm.22496] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Keila de Almeida Franceschini
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | | | - Fabiane Carneiro Lopes
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Rodrigo Dantas Pereira
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Regina Guenka Palma-Dibb
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
| | - Manoel Damião de Sousa-Neto
- Department of Restorative Dentistry; Shcool of Dentistry of Ribeirão Preto, University of São Paulo; Ribeirão Preto São Paulo Brazil
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