Brazilian dental journal最新文献_第9页

Effect of cementation protocols on the fracture load of bilayer ceramic crowns manufactured by the Rapid Layer Technology. 粘接方案对快速分层技术制造的双层陶瓷冠断裂载荷的影响。

Brazilian dental journal Pub Date : 2024-09-16 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405917

Sarah Emille Gomes da Silva, Júlia M Costa Lima, Elen G Lima, Renata M Melo, Marco A Bottino, Rodrigo O Assunção E Souza

{"title":"Effect of cementation protocols on the fracture load of bilayer ceramic crowns manufactured by the Rapid Layer Technology.","authors":"Sarah Emille Gomes da Silva, Júlia M Costa Lima, Elen G Lima, Renata M Melo, Marco A Bottino, Rodrigo O Assunção E Souza","doi":"10.1590/0103-6440202405917","DOIUrl":"10.1590/0103-6440202405917","url":null,"abstract":"To evaluate the fracture load of bilayer ceramic crowns manufactured by Rapid Layer Technology (RLT) after different cementation protocols of the veneering ceramic to the zirconia infrastructures. Sixty epoxy resin preparations simulating a molar tooth were obtained and 60 zirconia infrastructures and feldspathic crowns were manufactured by RLT and divided into 6 groups according to the cementation protocol at the interface to veneering ceramic (n=10): Ctr- control: conventional resin cement; Al- Al2O3 sandblasting 50µm + conventional resin cement; Al/MDP- Al2O3 sandblasting (50µm) + resin cement with MDP; Sil- silicatization 30µm + conventional resin cement; Gl/HF- glaze + hydrofluoridric acid (5%,60s) + silane + conventional resin cement; Gl- glazing as bonding agent. The feldspathic ceramic internal surface was etched with fluoridric acid (5%) + silane followed by cementation according to respective protocols. All samples were mechanically cycled (200N and 4.5x105 Pa, 37°C, 2x106 cycles, 3.4Hz) and submitted to axial compressing fracture load test (10kN, 0.5mm/min). The results(N) were submitted to descriptive and analytical statistical analysis with 1-way ANOVA, Weibull, and the Tukey test (α=0.05). ANOVA revealed that there was a significant difference among the tested groups (p<0.0001). The group Al/MDP presented the higher resistance to fracture (1972.46A N), followed by the Ctr group (1584.41B N). The characteristic strength(σ0) was significantly different (p=0.000). The crack and chipping were the predominant failures. The air-abrasion at the external surface of zirconia with Al2O3 followed by cementation with MDP resin cement, should be selected to Rapid Layer Technique when felspathic ceramic is used as veneer ceramic.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e245917"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405011/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Masking discolored substrates with resin composites: effect of layering strategies. 用树脂复合材料遮盖变色基材：分层策略的影响。

Brazilian dental journal Pub Date : 2024-09-16 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405910

Pablo Machado Soares, Gratcheva Falcão Chiapinotto, Atais Bacchi Dds, Gabriel Kalil Rocha Pereira

{"title":"Masking discolored substrates with resin composites: effect of layering strategies.","authors":"Pablo Machado Soares, Gratcheva Falcão Chiapinotto, Atais Bacchi Dds, Gabriel Kalil Rocha Pereira","doi":"10.1590/0103-6440202405910","DOIUrl":"10.1590/0103-6440202405910","url":null,"abstract":"This study aimed to evaluate the masking ability of different resin composite (RC) layering techniques over discolored substrates. Layering strategies were tested (n=10), using different RCs: flowable opaque, white dentin, A1 dentin, A1 body, and A1 enamel (Filtek Z350XT; 3M ESPE). Bilayer and trilayer RC combinations resulted in final thicknesses of 1 mm, 1.5 mm, and 2 mm. Substrates tested were: A1 (reference), A3, A4, B3, C2, and C4 (Filtek Z350XT Dentin; 3M ESPE). Color differences (∆E00) were measured for the RC layers over discolored substrates with the CIEDE2000 formula. The results were compared statistically (One-way ANOVA) and descriptively (acceptability=1.77 and perceptibility=0.81 thresholds). The layering strategy influenced the ∆E00 of RCs over all substrates (P<0.001). The 1 mm bilayer group combining 0.5 mm of dentin and 0.5 mm of enamel led to ∆E00 below AT for substrates A3 and B3; the 1.5 mm bilayer group combining A1 dentin (1 mm) and enamel (0.5 mm) provided ∆E00 below AT for substrates A3, A4, and C2 and ∆E00 below PT for B3; for substrate C4, the 2 mm trilayer group combining flowable opaque (0.2 mm), A1 dentin (1.3 mm) and enamel (0.5 mm) provided ∆E00 below PT, and the 1.5 mm trilayer groups (flowable opaque + 0.8 mm dentin or body + enamel) led to ∆E00 below AT. Resin Composites were effective in masking discolored substrates. The most adequate layering strategy depended on substrate shade.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e245910"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405007/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relation between Schneiderian membrane thickening and radiodiagnostic features of periapical pathology. 施奈德膜增厚与根尖周病变放射诊断特征之间的关系。

Brazilian dental journal Pub Date : 2024-09-16 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405775

Nicolly Oliveira-Santos, André Ferreira Leite, Eline Petitjean, Andres Torres, Dominique Van der Veken, Frederik Curvers, Jáder Camilo Pinto, Paul Lambrechts, Renhilde Jacobsi

{"title":"The relation between Schneiderian membrane thickening and radiodiagnostic features of periapical pathology.","authors":"Nicolly Oliveira-Santos, André Ferreira Leite, Eline Petitjean, Andres Torres, Dominique Van der Veken, Frederik Curvers, Jáder Camilo Pinto, Paul Lambrechts, Renhilde Jacobsi","doi":"10.1590/0103-6440202405775","DOIUrl":"10.1590/0103-6440202405775","url":null,"abstract":"This study aimed to assess the relationship between Schneiderian membrane thickening and periapical pathology in a retrospective analysis of Cone Beam Computed Tomography (CBCT) images. For this, 147 CBCT scans containing 258 sinuses and 1,181 teeth were assessed. Discontinuation of the lamina dura, widening of the periodontal ligament space, apical periodontitis (AP), and partly demineralized maxillary sinus floor associated with AP were considered periapical pathology. Maxillary sinus mucosal thickening (MSMT) was classified as odontogenic or non-odontogenic. An irregular band with a focal tooth associated thickening and local thickening related to a root were considered odontogenic types of MSMT. The relation between the imaging features of periapical pathology and the type and thickness of MSMT was determined by logistic regression and linear mixed model, respectively. In addition, linear regression and Mann Whitney test evaluated the relation and demineralization of the AP lesion towards the sinus floor (p≤0.05). The odds of having an odontogenic type of MSMT were significantly higher when a periapical pathology was present in the maxillary sinus. Eighty-two percent of AP partly demineralized towards the sinus floor were associated with an odontogenic MSMT. Both AP lesions partly demineralized towards the sinus floor and, with increased diameter, led to increased MSMT. In conclusion, there is an 82% risk of having an odontogenic type of MSMT with the presence of AP partly demineralized towards the sinus floor. More thickening of the maxillary sinus mucosa is seen with larger AP lesions and partial demineralization of the sinus floor.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"e245775"},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405008/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405798

David Fatola, Ismet Danial Nasution, Muhammad Sabri, Ricca Chairunnisa

{"title":"Pain-related analysis on a resorbed ridge with various denture occlusal schemes using finite element method.","authors":"David Fatola, Ismet Danial Nasution, Muhammad Sabri, Ricca Chairunnisa","doi":"10.1590/0103-6440202405798","DOIUrl":"10.1590/0103-6440202405798","url":null,"abstract":"Resorbed alveolar ridges, particularly in the lower jaw, have a small denture supporting area, which may cause the stress distribution of mastication load to exceed the pressure-pain threshold (PPT) and induce pain in the mucosa or potentially worsen the ridge resorption. Thus, choosing the ideal occlusal scheme among bilateral balanced (BBO), lingualized (LO), and monoplane (MO) for such conditions becomes crucial. The experiment was conducted using the finite element method on a modeling of a resorbed alveolar ridge in the lower jaw with three dentures placed on top, each of which was given different loading points according to the tooth arrangement of BBO, LO, and MO. The axial load was 100 N, and the resultant oblique loads on BBO and LO were 119 N and 106 N, respectively. The von Mises stresses for BBO, LO, and MO were observed in nine denture-supporting areas, and the results showed that the axial load did not produce stresses that exceeded the PPT value (0.64925 MPa) for BBO, LO, and MO with the highest value on area H, 0.43229 MPa, 0.39715 MPa, and 0.31576 MPa, respectively. However, the oblique load direction showed that the BBO had more areas (area E 0.80778 MPa and area H 0.76256 MPa) that exceeded the PPT than LO (area E 0.64394 MPa). The lingualized occlusal scheme is ideal for patients with resorbed alveolar ridge conditions, especially in terms of limiting interferences when the denture is functioning while maintaining comfort but still providing good masticatory performance and satisfactory esthetics.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5798"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11262769/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surrounding and background shades effect on color adjustment of single-shade composites. 周围色调和背景色调对单一色调复合材料色彩调整的影响。

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405742

Márcia Luciana Carregosa Santana, Gabriella de Jess Santos Livi, Tauan Rosa Santana, Paula Fernanda Damasceno Silva, Clara Lemos Leal Barata de Matos, Carolina Menezes Maciel, André Luis Faria-E-Silva

{"title":"Surrounding and background shades effect on color adjustment of single-shade composites.","authors":"Márcia Luciana Carregosa Santana, Gabriella de Jess Santos Livi, Tauan Rosa Santana, Paula Fernanda Damasceno Silva, Clara Lemos Leal Barata de Matos, Carolina Menezes Maciel, André Luis Faria-E-Silva","doi":"10.1590/0103-6440202405742","DOIUrl":"10.1590/0103-6440202405742","url":null,"abstract":"This study evaluated the effects of surrounding and background shades on the color adjustment potential (CAP) and visual color match of two single-shade composites, Vittra APS Unique and Charisma Diamond One. Cylinder-shaped specimens were constructed, consisting of either single-shade composites alone (simple) or composites surrounded by the Forma material at shades A1 or A3 (dual). Simple specimens using only the Forma at the specified shades were also prepared. Color measurements of simple specimens were taken against a gray background using a spectrophotometer. For dual specimens, the color of the inner composite was measured against a gray or chromatic (the same shade as the outer composite) background. Color differences (ΔE00) between the single-shade composites and the A1/A3 composite were calculated. CAP was determined by comparing data from simple and dual specimens. Four experienced dentists scored the color match (perfect to unacceptable) for each specimen using a viewing booth illuminated by an illuminant D65. Data were analyzed with repeated-measures ANOVA and the Kruskal-Wallis test. The results showed that both single-shade composites showed the lowest color discrepancies when they were compared to A1 and A3. Using a chromatic background only significantly affected the CAP when the outer composite was A3. The visual analysis showed poor color matches between the single-shade and control chromatic composites, except for Charisma Diamond One surrounded by A1. In conclusion, the CAP values of the evaluated single-shade composites were impacted by both surrounding shade and background color, and the color match of these materials tended to be poor.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5742"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11262758/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of ultrasonic activation on setting time, pH and calcium ion release, solubility, and chemical structure of calcium silicate sealers. 超声波活化对硅酸钙密封剂的凝固时间、pH 值和钙离子释放、溶解度以及化学结构的影响。

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405824

Simone Argenta Scalabrin, Lina Naomi Hashizume, Theodoro Weissheimer, Gabriel Barcelos Só, Jefferson Ricardo Pereira, Milton Carlos Kuga, Ricardo Abreu da Rosa, Marcus Vinicius Reis Só

{"title":"Effect of ultrasonic activation on setting time, pH and calcium ion release, solubility, and chemical structure of calcium silicate sealers.","authors":"Simone Argenta Scalabrin, Lina Naomi Hashizume, Theodoro Weissheimer, Gabriel Barcelos Só, Jefferson Ricardo Pereira, Milton Carlos Kuga, Ricardo Abreu da Rosa, Marcus Vinicius Reis Só","doi":"10.1590/0103-6440202405824","DOIUrl":"10.1590/0103-6440202405824","url":null,"abstract":"This study evaluated the setting time, pH, calcium ion release, solubility, and chemical structure of four calcium silicate sealers after ultrasonic activation (UA). Five sealers were evaluated: Sealer Plus (SP - control); Sealer Plus BC (SPBC), Bio C Sealers (BCS), Endosequence BC Sealer (EBC), and BioRoot RCS (BR). Ten groups were created based on the use or not of ultrasonic activation: SP; SP/UA; SPBC; SPBC/UA; BCS; BCS/UA; EBC; EBC/UA; BR; and BR/UA. Setting time was performed based on ISO 6876:2012 and ASTM C266-07 specifications. Solubility at 24hs, based on ISO 6876:2012. pH and calcium release were evaluated at 1, 24, 72, and 168hs. Raman spectroscopy was used to evaluate structural changes. Quantitative data were analyzed using One-Way ANOVA and Tukey post-hoc test (α=5%). Raman spectroscopy results were qualitatively analyzed. Setting times and solubility of all sealers were not affected by UA (p>0.05). The highest solubility was found for BCS, BCS/UA; and BR, BR/UA (p<0.05). After 24hs, calcium silicate sealers had higher pH than SP and SP/UA (p<0.05). BR and BR/UA had the highest pH at all time points. SP and SP/UA had stable pH at all time points. SP and SP/UA had the lowest calcium release values at all time points (p<0.05). EBC and EBC/UA calcium release significantly differ at 24,72 and 168hs (p<0.05). No chemical changes were observed during Raman spectroscopy. In conclusion, ultrasonic activation affected calcium ion release only for EndoSequence BC Sealer. Ultrasonic activation did not influence the initial and final setting time, solubility, pH, and chemical structure of any investigated sealers.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5824"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11262761/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of hydrofluoric acid concentration and aging on the bond strength ceramics to a resin cement. 氢氟酸浓度和老化对陶瓷与树脂水泥粘接强度的影响。

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405669

Bruno Delgado Clerot, Lourenço Correr-Sobrinho, Milena Bandini, Evaldo Pinheiro Beserra-Neto, Fernanda Midori Tsuzuki, Rafael Rocha Pacheco, Ana Rosa Costa

{"title":"Effect of hydrofluoric acid concentration and aging on the bond strength ceramics to a resin cement.","authors":"Bruno Delgado Clerot, Lourenço Correr-Sobrinho, Milena Bandini, Evaldo Pinheiro Beserra-Neto, Fernanda Midori Tsuzuki, Rafael Rocha Pacheco, Ana Rosa Costa","doi":"10.1590/0103-6440202405669","DOIUrl":"10.1590/0103-6440202405669","url":null,"abstract":"This study evaluated the influence of hydrofluoric acid (HF) concentration and thermal cycling on the microshear bond strength (µSBS) of a resin luting agent to IPS e.max® CAD and Rosetta® SM. Ceramic specimens (12.0 x 14.0 x 1.5mm) were randomized into 8 groups (n=10) according to HF concentration, commercial brand, and aging. Immediately after polishing, and etching, all specimens were silanized and a layer of adhesive was applied. A PVS mold of 3 mm thickness and 10mm diameter with (four) 1.0mm holes was fabricated, placed on each specimen, and then filled with a resin luting agent. Half of the specimens were subjected to the µSBS test using an Instron at a speed of 1.0 mm/min, following a 24-hour storage in deionized water at 37ºC. The remaining specimens were subjected to thermal cycling (5ºC-55ºC, 30 seconds per bath) and µSBS. The data were evaluated utilizing a three-way ANOVA and Tukey's post-hoc test (α=0.05). Significant differences were found for HF concentration and aging (p<0.0001). No significant difference in µSBS was found for commercial brands (p=0.085). The interaction between brand and HF concentration (p=0.358), brand and aging (p=0.135), and HF concentration and aging (p=0.138) were not statistically significant. The triple interaction among these factors was not statistically significant (p=0.610). In conclusion, the bond strength is affected by the HF concentration. No statistical difference was observed between the two ceramics. Thermal cycling significantly reduced µSBS.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5669"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11262762/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dentinal Tubule Occluding Efficacy Of Er: YAG Laser And Universal Adhesive Loaded With Nano-Carbonated Apatite. 含纳米碳化磷灰石的 Er: YAG 激光和通用粘合剂对牙本质小管闭塞的功效

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405858

Omnia Medhat, Mostafa Ghieth, Mahmoud Elkady, Mona Riad

{"title":"Dentinal Tubule Occluding Efficacy Of Er: YAG Laser And Universal Adhesive Loaded With Nano-Carbonated Apatite.","authors":"Omnia Medhat, Mostafa Ghieth, Mahmoud Elkady, Mona Riad","doi":"10.1590/0103-6440202405858","DOIUrl":"10.1590/0103-6440202405858","url":null,"abstract":"ER:YAG laser and experimental resin-based dental adhesive loaded with functionalized carbonated apatite filler were used in this study to evaluate the dentin interaction in terms of penetration and occlusion of the dentinal tubules aiding in the control of dentin hypersensitivity (DH). Spheroidal Carbonated apatite nanoparticles (N-CAP), with an average size of 20±5 nm diameter, were synthesized, characterized, and incorporated in a universal adhesive \"All Bond Universal, Bisco, USA\", in (2% weight) concentration. Er:YAG laser \"Lightwalker, FOTONA, EU\" was adjusted to an energy output of 40mJ/ pulse and pulse repetition of 10 Hz for 10 seconds. Dentin specimens were prepared from the buccal surface of 75 extracted sound human molars. The specimens were randomly divided into five groups (n=15) according to the surface treatment: Group (L): Laser only; Group (LB): Laser in combination with adhesive; Group (LBN): Laser in combination with adhesive loaded with N-CAP; Group (B): adhesive only; and Group (BN): adhesive loaded with N-CAP. Depth of penetration and occlusion of the dentinal tubules were assessed using Environmental Scanning Electron Microscope Examination (ESEM). One-way ANOVA was used to compare groups, followed by a pairwise test for multiple comparisons (α=0.05). Groups (LB), and (LBN) showed the highest mean of dentinal tubules' penetration, with a non-significant difference between them. In contrast, the specimens treated with laser only (L) showed the most minor penetration. The employment of ER-YAG laser irradiation with the adhesive loaded with N-CAP was evaluated to be effective in penetrating and occluding the opened dentinal tubules.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5858"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Debridement ability of the WaveOne Gold and TruNatomy systems in the apical third of root canals: ex vivo assessment. WaveOne Gold 和 TruNatomy 系统在根管顶端三分之一处的清创能力：体外评估。

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405773

Sara Carvalho Avelar de Oliveira, Carlos Eduardo da Silveira Bueno, Rina Andréa Pelegrine, Carlos Eduardo Fontana, Alexandre Sigrist de Martin, Carolina Pessoa Stringheta

{"title":"Debridement ability of the WaveOne Gold and TruNatomy systems in the apical third of root canals: ex vivo assessment.","authors":"Sara Carvalho Avelar de Oliveira, Carlos Eduardo da Silveira Bueno, Rina Andréa Pelegrine, Carlos Eduardo Fontana, Alexandre Sigrist de Martin, Carolina Pessoa Stringheta","doi":"10.1590/0103-6440202405773","DOIUrl":"10.1590/0103-6440202405773","url":null,"abstract":"Cleaning and shaping the root canal system are essential steps for performing successful endodontic therapy, and are challenging procedures in the apical region. This study aimed to conduct an ex vivo assessment of the debridement ability of the WaveOne Gold (Medium 35/.06) and TruNatomy (Medium 36/.03) systems in the apical third of round root canals of mandibular premolars. Forty-eight teeth, extracted for orthodontic or periodontal reasons, were divided into three groups (n=16), as follows: Group C, control (without instrumentation or irrigation); Group WOG, instrumentation with WaveOne Gold; Group TN, instrumentation with TruNatomy. A total of 40 mL of 2.5% sodium hypochlorite and 5 mL of 17% ethylenediamine tetraacetic acid were used per root canal in all the groups. Ten 0.5-μm serial cross-sections per specimen were obtained every 0.2 mm from a 2-mm segment of the apical region, extending from 1 to 3 mm short of the root apex. The sections were stained with hematoxylin-eosin and analyzed under a digital microscope (100x). The percentages of unprepared walls and remaining debris were quantified using ImageJ software. Generalized linear models were used to analyze the results (α=5%). Groups WOG and TN had significantly lower percentages of unprepared walls and remaining debris than Group C (p<0.05). There was no significant difference between groups WOG and TN for either of the variables studied (p>0.05). Instrumentation with the WaveOne Gold Medium and TruNatomy Medium instruments was associated with equivalent percentages of unprepared walls and remaining debris in the apical third of round canals of mandibular premolars.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5773"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11262772/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of blood and root-dentin cleaning on the porosity and bond strength of a collagen bioceramic material. 血液和牙根清洁对胶原生物陶瓷材料孔隙率和粘接强度的影响

Brazilian dental journal Pub Date : 2024-07-22 eCollection Date: 2024-01-01 DOI: 10.1590/0103-6440202405907

F M Saltareli, L M S Castro-Raucci, C E S Miranda, N C Tavella-Silva, I R Oliveira, W Raucci-Neto

{"title":"Effects of blood and root-dentin cleaning on the porosity and bond strength of a collagen bioceramic material.","authors":"F M Saltareli, L M S Castro-Raucci, C E S Miranda, N C Tavella-Silva, I R Oliveira, W Raucci-Neto","doi":"10.1590/0103-6440202405907","DOIUrl":"10.1590/0103-6440202405907","url":null,"abstract":"To assess the effect of cleaning protocols on dentin contaminated with blood in reparative endodontic materials, bovine root samples were divided: no contamination (N); contamination (P); contamination and cleaning with saline (S), 2.5% NaOCl+saline (Na) or 2.5% NaOCl+17% EDTA+saline (NaE) and filled with: mineral trioxide aggregate (MTA), calcium-aluminate-cement (C), or C+collagen (Ccol) (n=13). The samples were evaluated for porosity, chemical composition, and bond strength. MTA porosity was lower than C (p=0.02) and higher than Ccol (p<0.001). P and NaE were similar (p=1.00), but higher than the other groups (p<0.001). MTA bond strength was similar to Ccol (p=0.777) and lower than C (p=0.028). P presented lower bond strength than the N (p<0.001); S and Na were similar to each other (p=0.969), but higher than P and lower than N (p<0.001). It was observed a predominance of mixed and cohesive failures. None of the samples showed Ca/P ratio values similar to human hydroxyapatite. This study showed that contamination with blood increased the materials porosity, but dentin cleaning with 2.5% NaOCl reduced this effect, and the collagen additive reduced the material porosity. Furthermore, blood contamination reduced the materials bond strength, and cleaning with saline or 2.5% NaOCl diminished this effect.","PeriodicalId":101363,"journal":{"name":"Brazilian dental journal","volume":"35 ","pages":"5907"},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11262771/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141753743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0