American journal of dentistry最新文献

筛选
英文 中文
The effect of a universal cleaning agent on the bonding performance of a self-adhesive cement to contaminated dentin surfaces. 通用清洁剂对自粘牙胶与受污染牙本质表面粘接性能的影响。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-10-01
Ozge Çeliksöz, Hatice Tepe, Batu C Yaman, Zeynep Dikmen, Fusun Ozer
{"title":"The effect of a universal cleaning agent on the bonding performance of a self-adhesive cement to contaminated dentin surfaces.","authors":"Ozge Çeliksöz, Hatice Tepe, Batu C Yaman, Zeynep Dikmen, Fusun Ozer","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>This study examined the effect of using KATANA Cleaner (KC) containing 10-methacryloyloxydecyl dihydrogen phosphate (MDP) salt on the micro-shear bond strength (µSBS) of a self-adhesive cement to uncontaminated and contaminated dentin.</p><p><strong>Methods: </strong>Dentin samples were categorized into four contamination conditions (no contamination, saliva, blood, saliva/blood mixed) and subjected to two decontamination methods (water rinse and KC use), forming eight groups. Scanning electron microscope images representing each group were obtained. One sample representing each group was analyzed by Raman Spectroscopy. Composite resin was bonded to the sample dentin surfaces with a self-adhesive resin cement. After 5,000 thermal cycles, the µSBS test was performed. The data were analyzed statistically (α= 0.05).</p><p><strong>Results: </strong>The lowest µSBS value was observed in the water-rinsed mixed contamination group, while the highest was in the KC-treated uncontaminated group. KC-treated groups exhibited significantly higher µSBS values compared to water-rinsed groups for each contamination type (P< 0.05), indicating the efficacy of KC in enhancing bond strength.</p><p><strong>Clinical significance: </strong>There are limited studies using the new MDP salt-containing cleaner on dentin. In this study, contamination of dentin tissue with saliva, blood, and saliva/blood mixture was simulated and the effects of water rinsing and MDP salt-containing cleaner (KATANA Cleaner) on bond strength were tested as decontamination methods. The results showed that the use of a cleaner containing MDP salt increased the bond strength to dentin tissue under both non-contaminated and contaminated conditions.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 5","pages":"230-236"},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Charcoal dentifrices: A laboratory study of their safety and efficacy. 木炭牙膏:关于其安全性和有效性的实验室研究。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-10-01
Ashley N Bowers, Christina M Tyrakowski, Yukiko Koizumi, Rayhan Shah, Prerna Gopal, Simone Duarte
{"title":"Charcoal dentifrices: A laboratory study of their safety and efficacy.","authors":"Ashley N Bowers, Christina M Tyrakowski, Yukiko Koizumi, Rayhan Shah, Prerna Gopal, Simone Duarte","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To compare charcoal-containing dentifrices (CDs) to non-charcoal containing dentifrices (NCDs) through the following experiments: potentially available fluoride, 1-minute fluoride release, pH, cytotoxicity, heavy metals, enamel fluoride uptake (EFU) and relative dentin abrasivity (RDA).</p><p><strong>Methods: </strong>Nine fluoride dentifrices; six CDs and three NCDs were tested (n= 3) for available fluoride, the amount of fluoride released within 1 minute, pH cytotoxicity, heavy metals, EFU and RDA. Four CDs and 1 NCD contained sodium fluoride (NaF) as the active ingredient whereas two dentifrices contained stannous fluoride (SnF₂; 1 CD and 1 NCD), and two dentifrices contained disodium monofluorophosphate (Na₂FPO₃, or Na₂MFP; 1 CD and 1 NCD). Available samples were homogenized and diluted to 1-in-100 in deionized water (DIW). Release samples were prepared as 1-in-4 homogenized dilutions by mass in DIW. Available and release samples were measured in triplicate (n= 3) via fluoride ion-selective electrode (F-ISE) and ion chromatography (IC). ANSI/ADA 130 was followed for pH. L929 cells were cultured using the lactate dehydrogenase (LDH) assay and ISO 10993-5 Annex C MTT cytotoxicity test. Heavy metals testing was performed using a hydrofluoric acid digestion sample preparation method followed by inductively coupled plasma mass spectrometry (ICP-MS) detection. EFU was performed on enamel specimens that underwent treatment with a CD slurry (1-in-4 dilution) following Test Method #40 of FDA Monograph 21. RDA was performed following ISO 11609 Annex A and the Hefferren method. Data was analyzed using one-way ANOVA followed by post-hoc tests (α= 0.05).</p><p><strong>Results: </strong>Available fluoride for all nine dentifrices was between ~93-102% of the labeled amount. The amount of fluoride released after 1 minute of homogenous mixing ranged between 75-107% of the labeled amount. The pH values of the nine dentifrices ranged from 6.5 to 7.7. Charcoal did not significantly contribute to cytotoxicity in L929 cells. The concentrations of each heavy metal (Hg, Cd, As and Pb) present in each of the nine dentifrices were < 1 ppm, indicating trace amounts. The CDs were not significantly more abrasive than the NCDs. The SnF₂ CD had the highest EFU value (644.2 ±131.7 ppm) followed by the NaF CD and the Na₂MFP CD at 492.2± 69.5 ppm and 140.1± 28.1 ppm, respectively.</p><p><strong>Clinical significance: </strong>Charcoal-containing dentifrices were not found to be significantly more abrasive or cytotoxic than non-charcoal-containing dentifrices. Charcoal and non-charcoal-containing dentifrices were also found to be comparable through experiments determining their fluoride content, pH, enamel fluoride uptake and heavy metals.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 5","pages":"255-262"},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of file compression on radiographic diagnosis of periodontal bone loss on smartphones. 文件压缩对智能手机牙周骨质流失放射诊断的影响。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-10-01
Gleica D Savegnago, Youdeline J Jacques, Gabriela B Ortigara, Mariana B Vizzotto, Gabriela S Liedke
{"title":"Influence of file compression on radiographic diagnosis of periodontal bone loss on smartphones.","authors":"Gleica D Savegnago, Youdeline J Jacques, Gabriela B Ortigara, Mariana B Vizzotto, Gabriela S Liedke","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the influence of imaging compression on radiographic diagnosis of periodontal bone loss on smartphones.</p><p><strong>Methods: </strong>45 digital periapical radiographs with diverse periodontal bone loss patterns were selected. All radiographs were performed with a CMOS-type sensor and were exported from the acquisition software with two compressions: JPEG with a 10% compression rate and JPEG with a 90% compression rate. Images were shared using the WhatsApp application and three examiners evaluated all radiographs on the smartphone. The examiners' diagnostic agreement was evaluated using the Kappa index. The McNemar and Cochran's Q statistical tests were used to compare the impact of the image compression, examiner, and type of periodontal bone defect on the diagnosis. Statistical analysis was performed using the SPSS software.</p><p><strong>Results: </strong>Kappa values were greater than 0.7 for all examiners and no statistically significant difference for the periodontal diagnosis, regardless of the image compression, the examiner background, and the type of periodontal bone defect.</p><p><strong>Clinical significance: </strong>The use of smartphones to analyze and share images has become very common in dentistry. This study shows that images can be shared and analyzed on smartphones without compromising periodontal diagnosis, regardless of their spatial resolution.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 5","pages":"244-246"},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Framework's marginal adaptation evaluation of fixed partial denture using conventional and digital impression techniques. 使用传统和数字印模技术评估固定局部义齿的框架边缘适应性。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-10-01
Ingrid C C Souto, Otavio M Dos Santos Neto, Livia Florin, Ana Paula Macedo, Rossana P De Almeida
{"title":"Framework's marginal adaptation evaluation of fixed partial denture using conventional and digital impression techniques.","authors":"Ingrid C C Souto, Otavio M Dos Santos Neto, Livia Florin, Ana Paula Macedo, Rossana P De Almeida","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the marginal and internal misfit of fixed partial denture zirconia frameworks developed from conventional impression and intraoral scanning, before and after being subjected to the thermal cycle of the covering ceramic.</p><p><strong>Methods: </strong>A three-elements fixed partial denture was prepared, molded, and poured with polyurethane. Group CI (n= 7) was impressed by the conventional technique with polyvinyl siloxane material, and the plaster models scanned on the inEosX5 bench scanner. Group DI (n=07) was scanned using the CEREC Bluecam intraoral scanner. The models and images obtained were sent to the laboratory and the frameworks were made using zirconia blocks. After this, they were subjected to the ceramic thermal cycle, simulating the ceramic application. Marginal and internal misfits of the frameworks were measured before (T1) and after (T2) thermal cycle simulation using the replica technique in an optical microscope. Statistical analysis was performed using the mixed effects of linear model tests and comparisons.</p><p><strong>Results: </strong>There were no statistical differences for axial misfit. Significant differences were found between the groups for occlusal, vertical, horizontal, and absolute misfit, where group CI had higher values than group DI (P< 0.001). At the time, there was a statistical difference only in the absolute misfit, where T1 had lower values than T2. The misfit in group CI was greater than in group DI; however, the average misfit values found are low and considered clinically acceptable.</p><p><strong>Clinical significance: </strong>Knowing marginal and internal misfit is an important step to consolidating digital impressions in fixed partial dentures, implying a secure use of this technique.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 5","pages":"263-267"},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comparison of polishing systems and thermal cycling on the surface roughness and color stability of a single-shade resin composite. 抛光系统和热循环对单色树脂复合材料表面粗糙度和颜色稳定性的影响比较。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-10-01
Sanem Ozaslan, Batu C Yaman, Ozge Çeliksöz, Hatice Tepe, Begum Tavas
{"title":"A comparison of polishing systems and thermal cycling on the surface roughness and color stability of a single-shade resin composite.","authors":"Sanem Ozaslan, Batu C Yaman, Ozge Çeliksöz, Hatice Tepe, Begum Tavas","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the surface roughness and color stability of a single-shade composite resin after thermal cycling with different finishing and polishing systems.</p><p><strong>Methods: </strong>A total of 91 specimens were prepared with standard molds using a single-shade resin composite Omnichroma. The specimens were randomly separated into seven groups: Control (Mylar strip only), grit (600 grit SiC abrasive paper), OneGloss, Clearfil Twist Dia, Sof-Lex Diamond Polishing System, EVE Diacomp Plus Twist, and OptiDisc. The top surface of each specimen was polished per the manufacturers' directions. After initial measurements, 10,000 and 50,000 thermal cycles were performed. After each thermal cycling, the measurements were retaken. A generalized linear model analysis was used to compare the values, and multiple comparisons were performed with the Bonferroni correction.</p><p><strong>Results: </strong>Different finishing and polishing systems and thermal cycling significantly affected the surface roughness and color change of the single-shade composite resin (P< 0.001). The smoothest surfaces were obtained with the Sof-Lex Diamond Polishing System, while the group polished with Clearfil Twist Dia showed the least color change.</p><p><strong>Clinical significance: </strong>The surface roughness of the single-shade resin composite exhibited acceptable values for all polishing systems tested. The color change values of the single-shade resin composite were found to be above the acceptable value for all polishing systems, but the two-step spiral polishing systems performed better in terms of color stability.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 5","pages":"247-254"},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of salivary contamination on the shear bond strengths of universal adhesives to dentin. 唾液污染对通用粘合剂与牙本质剪切粘接强度的影响。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-10-01
Mark A Latta, Toshiki Takamizawa, Scott M Radniecki, Wayne W Barkmeier, Frank Pfefferkorn, Luisa M Antunes, Melissa R Siebert, Alvin R Samuels
{"title":"Effects of salivary contamination on the shear bond strengths of universal adhesives to dentin.","authors":"Mark A Latta, Toshiki Takamizawa, Scott M Radniecki, Wayne W Barkmeier, Frank Pfefferkorn, Luisa M Antunes, Melissa R Siebert, Alvin R Samuels","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the shear bond strength (SBS) of resin composite to dentin contaminated with artificial saliva (AS) containing mucin and amylase using an experimental method controlling the volume of saliva and adhesive in a defined surface area.</p><p><strong>Methods: </strong>Flat bonding surfaces were prepared on extracted human molars (320 grit surface). Using adhesive tape, a 4.5 mm bonding window was prepared on the dentin surfaces. Groups (n= 12) were prepared using the etch & rinse (ER) or self-etch (SE) modes for Adhese Universal (ADH), Scotchbond Universal Plus (SBU), and Prime & Bond active (PBA) dental adhesives (DA). For the control (C) groups, the adhesives were applied per the manufacturers' instructions with 2.0 µl or 3.0 µl of the adhesive. For the saliva-contaminated groups, 1.0 µl of artificial saliva with mucin was applied in the bonding window either dried or allowed to remain wet before the application of either 2.0 µl or 3.0 µl of the adhesive. After the adhesive film was air dried and light cured using an Ultradent bonding fixture, Spectrum TPH3 was bonded to the prepared surfaces. After water storage for 24 hours at 37°C, the specimens were debonded and shear bond strength (SBS) was calculated (MPa). A Kruskal-Wallis test with Bonferroni correction was used to determine group differences (P< 0.05). Scanning electron microscopy (SEM) was performed to visualize the interfacial surfaces prepared using an ion-etching technique.</p><p><strong>Results: </strong>Mean SBS for the three adhesives were similar in both ER and SE modes to uncontaminated dentin surfaces for all the control groups. For dentin contaminated with dried or wet saliva, both the surface condition and the adhesive system were significant factors at a confidence level of 95%. For the dried saliva test groups, ADH and PBA with 3.0 µl of adhesive generated similar SBS values to controls while SBU generated lower values. Lower values were generated when using 2.0 µl of adhesive for the three adhesives in SE and ER modes except for PBA in the ER mode. Using wet saliva and 3.0 µl of adhesive ADH and SBU generated lower SBS values while PBA generated similar values to controls. Under SEM, morphology at the adhesive dentin interfaces was similar among the adhesives to uncontaminated dentin but notable differences were observed for SBU and ADH for both wet and dried saliva-contaminated surfaces.</p><p><strong>Clinical significance: </strong>Salivary contamination differentially affects shear bond strength and the morphology of the bonded interface of universal adhesives to dentin. These differences are specific to the adhesive tested and are influenced by using the etch and rinse or self-etch strategies and the volume of adhesive used. When concerned about salivary contamination clinically, maximizing the volume of adhesive on the substrate may help mitigate the deleterious effects of saliva contamination.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 5","pages":"268-276"},"PeriodicalIF":0.9,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142339251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microhardness, diametral tensile strength and color stability of heated resin composites used for luting ceramic veneers. 用于粘接陶瓷贴面的加热树脂复合材料的显微硬度、直径拉伸强度和颜色稳定性。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-08-01
Leandro C Lima, Juliana Aldarvis, Flávia LBdo Amaral, Waldemir F Vieira-Junior, Cecilia P Turssi, Roberta T Basting, Adriano Lima, Leonardo S Barros, Fabiana Mg França
{"title":"Microhardness, diametral tensile strength and color stability of heated resin composites used for luting ceramic veneers.","authors":"Leandro C Lima, Juliana Aldarvis, Flávia LBdo Amaral, Waldemir F Vieira-Junior, Cecilia P Turssi, Roberta T Basting, Adriano Lima, Leonardo S Barros, Fabiana Mg França","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate color change in ceramic veneers luted to enamel with light-cured, dual-cured resin luting agents, or heated resin composites, as well as to evaluate microhardness and diametral tensile strength of these luting agents.</p><p><strong>Methods: </strong>For color analysis, 0.5 mm-thick leucite-reinforced glass ceramic veneers (IPS Empress CAD) were cemented onto 40 bovine dental blocks (n= 10) using RelyX Ultimate (RU) or RelyX Veneer (RV) resin-based luting agents, or Gradia Direct (GD) and Palfique Lx5 (P) heated resin composites. After luting, the specimens were subjected to thermocycling (10,000 cycles). Color analysis was performed before and after thermocycling (L*, a*, b*, ΔEab, ΔE₀₀). For the microhardness (Knoop) and diametral tensile strength tests, specimens (Ø 6 x 2 mm) were made (RU, RV, GD, and P). The specimens were subdivided into eight groups (n=10) and light-cured through different ceramic sheets (thicknesses of 0.5 mm or 1.5 mm). Knoop microhardness was performed on the top surface in a microhardness tester, and diametral tensile strength on a universal testing machine. Data were submitted to statistical analysis, using two-way ANOVA, Tukey, and Kruskal-Wallis tests (α= 0.05).</p><p><strong>Results: </strong>For the general color alteration, there was no statistically significant difference between the luting materials (ΔEab, P= 0.57; ΔE₀₀, P= 0.50). There was no interaction between luting agent and thermocycling, for L* (P= 0.87), a* (P= 0.97) and b* (P= 0.95) values. Thermocycling significantly affected only the L* values (P= 0.047), which increased after the cycles. For microhardness, there was a statistically significant difference considering luting agents and ceramic thickness (P< 0.001). GD heated resin composite presented significantly lower microhardness values than all other materials, at both ceramic thicknesses. At a thickness of 1.5 mm, RU cement had higher microhardness values than RV and P materials. Diametral tensile strength was significantly influenced by luting agent (P= 0.01), but not by ceramic thickness (P= 0.55). Diametral tensile strength of GD resin composite was higher than that of the RU, but neither of these two materials differed from RV and P.</p><p><strong>Clinical significance: </strong>Heated resin composite, used as luting agents, showed similar color stability to light-cured and dual-cure resin cements, however its microhardness was affected by ceramic thickness.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 4","pages":"191-196"},"PeriodicalIF":0.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142071772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of provisional cementation on the stability of adhesively bonded resin-based composite crowns. 临时粘接对粘接树脂基复合牙冠稳定性的影响。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-08-01
Michael B Schmidt, Angelika Rauch, Laura Haas, Martin Rosentritt
{"title":"Influence of provisional cementation on the stability of adhesively bonded resin-based composite crowns.","authors":"Michael B Schmidt, Angelika Rauch, Laura Haas, Martin Rosentritt","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the influence of temporary cementation and subsequent bonding on the durability during in-vitro aging-simulation and fracture force of resin-based composite crowns.</p><p><strong>Methods: </strong>Identical molar crowns (n=48, n=8 per group) were milled from resin-based composites and temporarily cemented and finally bonded to human molars. To simulate temporary application, crowns were cemented either with zinc-oxide-eugenol-cement (Tempbond) or with eugenol free zinc-oxide-cement (Tempbond NE). For a first simulation of a long-term provisional clinical application, thermal cycling, and mechanical loading (TCML 2 x 600 x 5°C-55°C, 2 minutes each cycle, distilled water, 240,000 cycles at 50N) was performed. After TCML all crowns were removed, cleaned, and luted either by using etch-and-rinse technique (Vococid, Futurabond U, Bifix QM) or a self-adhesive (Bifix SE) cementation system. A second thermal cycling and mechanical loading (TCML 2 x3,000 x 5°C/55°C, 2 minutes each cycle, distilled water, 1.2 x 10⁶ at 50N) was accomplished to simulate 5 years of clinical application. To assess the survival of the crowns, the failure rates during TCML were documented. As controls, crowns were included without prior provisional cementation. After TCML all crowns were loaded to failure. Failure was categorized as fracture of the crown and partial loosening of the crown.</p><p><strong>Results: </strong>All crowns survived both TCML procedures without any failures. The fracture values after TCML varied between 3,538.0 ± 1,041.2 N and 4,612.0 ± 801.5 N without significant (P= 0.146) differences between the individual groups. No correlation was found between fracture force and type of provisional cementation (zinc-oxide-eugenol vs. zinc-oxide: Pearson: -0.063/P= 0.672) or type of bonding (adhesive vs. self-adhesive: Pearson: -0.151/ P= 0.307). No different failure pattern was observed between the tested systems.</p><p><strong>Clinical significance: </strong>Regardless of the type of temporary cementation, there was no effect on the in-vitro performance or strength of the final permanently bonded crowns. Resin-based crowns might be bonded with adhesive or self-adhesive systems even after previous temporary cementation.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 4","pages":"183-186"},"PeriodicalIF":0.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142071771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A randomized crossover trial assessing denture adhesive for prevention of food infiltration among partial denture wearers. 一项随机交叉试验,评估义齿粘合剂对局部义齿佩戴者防止食物渗入的作用。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-08-01
Julie Grender, Malgorzata Klukowska, Kimberly Milleman, Jeffery Milleman
{"title":"A randomized crossover trial assessing denture adhesive for prevention of food infiltration among partial denture wearers.","authors":"Julie Grender, Malgorzata Klukowska, Kimberly Milleman, Jeffery Milleman","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>This two-treatment, four-period, double-blind, randomized controlled crossover trial assessed the ability of two denture adhesives, both applied with a thin nozzle in a continuous application pattern, to prevent food infiltration beneath partial dentures.</p><p><strong>Methods: </strong>Participants with mandibular partial dentures and a history of food particle infiltration were enrolled. All participants used both an optimized calcium/zinc partial salt of polyvinyl methyl ether/maleic acid (PVM/MA) denture adhesive and a calcium/sodium partial salt of PVM/MA test denture adhesive, twice each, throughout four study periods, according to a randomly assigned sequence. At each visit, participants underwent two assessments: once with no denture adhesive (baseline) and once with denture adhesive, 1 hour after adhesive application. For each assessment, participants ate one-half of the top of a poppy seed muffin, and a dental professional counted the seeds retained on the denture and mucosa, which was the primary variable. The change-from-baseline comparison was made for each treatment separately using a paired t-test or Wilcoxon Signed Rank test depending on the normality of the data. A between-treatment comparison for the change from baseline was performed using a crossover ANCOVA with treatment and period as fixed effects and participant as a random effect. The baseline poppy seed count was used as a covariate.</p><p><strong>Results: </strong>30 participants were enrolled; 29 completed the trial. Both denture adhesives achieved statistically significantly fewer retained seeds versus baseline (P< 0.001). The calcium/zinc adhesive reduced the seed count from baseline by 85.9% (6.18 vs 0.86), and the calcium/ sodium adhesive reduced seed count by 76.6% (6.04 vs 1.43). Comparing the two denture adhesives, the reduction in seed count from baseline was statistically significantly greater for the calcium/zinc adhesive versus the calcium/sodium formulation (P= 0.008).</p><p><strong>Clinical significance: </strong>These results support the recommendation of denture adhesive use for the prevention of food infiltration beneath partial dentures, with optimized calcium/zinc denture adhesive showing the greatest prevention benefit.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 4","pages":"216-220"},"PeriodicalIF":0.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142071766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Staining- and aging-dependent changes in color, translucency, and gloss of cloud-shade and one-shade resin composites. 云影和单影树脂复合材料的颜色、半透明度和光泽度随染色和老化而发生的变化。
IF 0.9 4区 医学
American journal of dentistry Pub Date : 2024-08-01
Hamid Nurrohman, Yonca Korkmaz-Ceyhan, Pinar Cevik, Rade D Paravina
{"title":"Staining- and aging-dependent changes in color, translucency, and gloss of cloud-shade and one-shade resin composites.","authors":"Hamid Nurrohman, Yonca Korkmaz-Ceyhan, Pinar Cevik, Rade D Paravina","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To compare staining and artificial accelerating aging-dependent changes in color, translucency, and gloss of cloud-shade and one-shade resin composite.</p><p><strong>Methods: </strong>The \"cloud-shade\" composites were Filtek Easy Match Universal Restorative (FU) and SimpliShade (SS): three shades each (light, medium and dark), while the \"one shade\" composites were Admira Fusion x-tra (AD) and Venus Diamond One (VE). Polymerized composite specimens (10 mm in diameter, 2 mm-thick) were polished using PoGo disks for 40 seconds. Color, translucency, and gloss measurements were performed before and after exposure to 3.8-day staining in coffee or wine (equivalent to a year of service with a 15-minute exposure per day), or exposure to 150 kJ/m² of accelerated aging (n= 5 per condition x three conditions, for a total of 15 specimens per shade). Color and translucency were measured using a benchtop spectrophotometer, and CIEDE2000 color differences (ΔE₀₀) and translucency parameter (TP₀₀) were calculated. Gloss (gloss units, GU) was measured using a small-area gloss meter. Gloss retention percentages after staining and aging were calculated. A two-way ANOVA was used to compare the effect of material and procedure, while a Tukey's post hoc multiple comparison test was used to assess differences among levels within each variable (α= 0.05).</p><p><strong>Results: </strong>The AD exhibited the best color stability upon staining, while VE was the most stable when exposed to artificial aging. Statistically significant differences were recorded among materials and procedures (P< 0.001), and their interactions (P< 0.01). AD also exhibited the highest TP stability upon staining, while the TP of FU was the most stable when exposed to artificial aging. Statistically significant differences were recorded among materials and procedures (P< 0.001), and their interactions (P< 0.01). Gloss retention upon staining and aging was greater than 90% for all tested materials. Statistically significant differences were recorded among materials (P< 0.001), procedures (P< 0.05), and their interactions (P< 0.01).</p><p><strong>Clinical significance: </strong>Staining and artificial accelerated aging changes in color, translucency parameter, and gloss retention of cloud-shade and one-shade resin composites were material- and procedure-dependent.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"37 4","pages":"201-205"},"PeriodicalIF":0.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142071774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信