American journal of dentistry最新文献

{"title":"Comparison of dimensional accuracy in models fabricated using various impression techniques and replica systems for implants placed according to the all-on-four treatment concept.","authors":"Sila Sucuka, Erva Eser, Volkan Şahin","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the inconsistencies of press-fit and screw-retained digital implant replicas in models obtained from different 3D printers using intraoral and extraoral digital impression techniques with the conventional method.</p><p><strong>Methods: </strong>An all-on-four concept edentulous maxillary model was fabricated. Two models were prepared with two manufacturing methods: conventional group (CNV group) and additive manufacturing group (AM group). The AM group was fabricated in two different technologies (SLA and LCD) 3D printers from impressions taken with an intraoral scanner and a model scanner. The AM group was further subdivided into press fit replicas and screw-retained replicas. The position of each abutment replica was measured with a coordinate measuring machine (CMM).</p><p><strong>Results: </strong>Models produced with the Anycubic printer gave inconsistent results in the z-axis (10.449 µm for group AM-5, 10.407 µm for group AM-6, 10.454 µm for group AM-7 and 10.43 µm for group AM-8). The other groups showed similar results in x-, y- and z-axis. The CNV group showed significant differences from some groups for XZ angle and YZ angle. IOS, EOS and conventional impression techniques showed similar accuracy. The screw-retained digital replica group showed better results than the press-fit digital replica group, but no significant difference was found. The Anycubic printer provided the least accurate values for implant replica positions, as it showed the highest discrepancy values on the vertical axis.</p><p><strong>Clinical significance: </strong>The Anycubic printer provided the least accurate values for implant replica positions, as it showed the highest discrepancy values on the vertical axis.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"142-148"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207385","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}

{"title":"Effect of immediate dentin sealing on bond strength and wettability in sound and eroded dentin: A laboratory study.","authors":"Otavio M Dos Santos Neto, Ingrid C C Souto, Rossana P de Almeida","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the influence of immediate dentin sealing (IDS) on the shear bond strength (SBS) and wettability of both sound and eroded dentin.</p><p><strong>Methods: </strong>Dentin specimens were divided into four groups (n= 21): sound dentin with and without IDS and eroded dentin with and without IDS. Erosive cycling was performed using 1% citric acid solution, and lithium disilicate discs were cemented onto the dentin. The samples underwent thermocycling and SBS testing (n= 10), with failure modes analyzed by stereomicroscopy. Scanning electron microscopy (SEM) (n= 3) was used to examine the hybrid layer and resin tags, while wettability (n= 8) was measured by contact angle analysis.</p><p><strong>Results: </strong>Erosion significantly reduced the SBS (P< 0.001), while IDS increased it for both sound and eroded dentin (P< 0.001). The most common failure mode was adhesive. SEM revealed a thicker hybrid layer and more resin tags in eroded dentin with IDS. Erosion did not affect wettability (P= 0.186), but IDS increased it (P< 0.001). IDS improved both SBS and wettability in sound and eroded dentin, suggesting it may be an effective technique for enhancing adhesion in restorative dentistry.</p><p><strong>Clinical significance: </strong>Immediate dentin sealing (IDS) improves bond strength and wettability in both sound and eroded dentin, making it a valuable technique for enhancing adhesion in restorative procedures, especially in cases with compromised dentin. This could contribute to the durability and success of restorations.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"129-134"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207386","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}

{"title":"Impact of adhesive systems on the bond strength of CAD-CAM ceramics to enamel and dentin: A comparative study.","authors":"Burcu Kanat-Ertürk, Begüm Karademir, Yasemin Yildiran-Avcu","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the laboratory shear bond strength of four different adhesive systems and to determine the effect of Universal adhesive when bonded to two CAD-CAM ceramics (IPS e.max CAD and Vita Suprinity) to tooth surfaces (enamel and dentin).</p><p><strong>Methods: </strong>80 human teeth were sectioned to obtain enamel and dentin substrates and embedded into acrylic molds (N= 160). Two CAD-CAM ceramics, including lithium-disilicate glass-ceramic (IPS e.max CAD) and zirconia-reinforced lithium-silicate glass-ceramic (Vita Suprinity), were milled into 2 mm diameter and 2.5 mm height specimens (N= 160). Four adhesive systems were tested: esthetic cement with universal adhesive in total-etch mode (Variolink Esthetic DC with Adhese Universal), total-etch (Variolink II), self-etch (Panavia F 2.0), and self-adhesive (Rely X U200) (n=10/subgroups). Cementation was performed according to the manufacturers' instructions, and shear bond strength test was applied (1mm/minute). Data were statistically analyzed using three-way ANOVA and independent t-tests. Fractured surfaces were also examined.</p><p><strong>Results: </strong>For enamel, the statistically highest values were observed in Variolink Esthetic DC with Adhese Universal and Variolink II, while Rely X U200 showed the lowest values for both ceramics. For dentin, no significant differences were found among most adhesive system groups. Shear bond strength values between IPS e.max CAD and Vita Suprinity were statistically similar for all adhesive systems. Cementation to enamel resulted in higher bond strengths than to dentin, except in the Rely X U200 group, where adhesive failures predominated for both ceramics. Variolink Esthetic DC with Universal Adhesive in total-etch mode produced numerically higher bond strength values for all groups, with a higher incidence of mixed failure types.</p><p><strong>Clinical significance: </strong>Variolink Esthetic DC with Universal Adhesive in total-etch mode, followed by Variolink II, provided stronger and more durable bonds, with enamel generally resulting in higher shear bond strengths than dentin for both IPS e.max CAD and Vita Suprinity. These findings can guide clinicians in selecting the most appropriate adhesive systems to optimize the longevity and effectiveness of IPS e.max CAD or Vita Suprinity depending on the type of tooth tissue.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"135-141"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207388","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}

{"title":"A 3-month randomized trial evaluating the effects of stannous fluoride bioavailability on gingivitis.","authors":"Tao He, Julie Grender, Yuanshu Zou, Pejmon Amini, Andrew Groth, Sanjeev Midha, Bill Glandorf, Eva Schneiderman, Jennifer Kennedy, Niranjan Ramji, Aaron R Biesbrock","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the impact of formulation chemistry on gingivitis effects of two experimental 0.454% stannous fluoride (SnF2) dentifrices with low tin bioavailability versus positive and negative controls.</p><p><strong>Methods: </strong>Adults with gingivitis were enrolled in this double-blind, parallel group, randomized clinical trial. Gingivitis was assessed with the Löe-Silness Gingivitis Index (LSGI) at baseline, 1 month, and 3 months. The four treatments were: experimental dentifrice A (0.454% SnF2, pH 4.7, soluble tin = 592 ppm), experimental dentifrice B (0.454% SnF2, pH 5.8, soluble tin = 102 ppm), positive control (0.454% SnF2 commercial dentifrice, soluble tin = 2,037 ppm), and negative control (0.76% sodium monofluorophosphate, soluble tin = 0 ppm). Participants brushed for 1 minute twice daily with their assigned dentifrice and a standard manual toothbrush. The primary clinical endpoint was number of gingival bleeding sites. In vitro analyses characterized tin uptake into biofilm and bacterial glycolysis.</p><p><strong>Results: </strong>Of 120 participants randomized to treatment, 115 completed the study. Baseline mean number of bleeding sites (SD) was 35.11 (17.479). At 1 and 3 months, respectively, the mean was 19.52 and 16.64 for the positive control, 26.91 and 21.71 for Experimental dentifrice A, 31.01 and 27.59 for Experimental dentifrice B, and 33.20 and 29.59 for the negative control. At 1 and 3 months, the positive control showed significantly fewer bleeding sites versus all treatments (P≤ 0.04) and Experimental dentifrice A had significantly less bleeding versus the negative control (P≤ 0.041). Experimental dentifrice B was not significantly different from the negative control (P≥ 0.438) at either timepoint. Tin biofilm uptake and in vitro PGRM exhibited a similar trend.</p><p><strong>Clinical significance: </strong>SnF2 dentifrice formulation chemistry influences the level of antigingivitis efficacy, which was also reflected in tin bioavailability, tin uptake into biofilm, and bacterial glycolysis inhibition.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"155-160"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207383","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}

{"title":"A visual analysis by dentists and patients of single-shade resin composite in non-carious cervical lesions: A prospective study.","authors":"Ingrid B D C Damasceno, Eduardo J V Lourenço, Mayla K S Teixeira, Marcelo J B Pinhão, Amanda B Ramos","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To visually analyze the chromatic behavior of single-shade resin composite in non-carious cervical lesions (NCCLs) and assess its acceptability among undergraduate and graduate students, dentistry professors, and patients.</p><p><strong>Methods: </strong>Restorations were performed on NCCLs using the single-shade resin composites Omnichroma (OC) and Vittra APS Unique (VT), with Filtek Z350 XT (FT) as the control. Patients with three or more NCCLs in consecutive teeth were included, and 22 restorations were visually analyzed by 20 evaluators who were tested for color vision deficiency. The restorations were evaluated based on World Dental Federation (FDI) criteria after 6 months, and a survey was completed by patients after 6 months. Data were analyzed using the Kruskal-Wallis test.</p><p><strong>Results: </strong>OC performed significantly better than VT (P= 0.020), but with no significant difference compared to FT (P= 0.441). OC had a 96.43% success rate in terms of color and translucency, compared to FT (92.50%) and VT (77.22%). Single-shade resin composites showed satisfactory compatibility in terms of color, translucency, and shine for NCCLs, as evaluated by both professionals and patients.</p><p><strong>Clinical significance: </strong>Single-shade resin can be used with promising results for NCCLs, with Omnichroma being recommended as it had the best performance.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"149-154"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207384","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}

{"title":"Investigation of the effectiveness of whitening toothpastes following bleaching treatments.","authors":"Tutku Baytok Kavci, Hande Kemaloğlu, Murat Türkün","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the laboratory effects of different whitening toothpastes on human anterior teeth that had undergone in-office bleaching with a 40% hydrogen peroxide (HP) agent.</p><p><strong>Methods: </strong>Fifty caries-free human anterior teeth extracted for periodontal or orthodontic reasons were randomly assigned to five groups (n=10): Group 1 (Control) : Bleached but no toothpaste applied; Group 2: Ipana Kalsident Classic Taste toothpaste; Group 3: Colgate Optic White Expert toothpaste; Group 4: Signal White Now Gold toothpaste; Group 5: Opalescence Whitening toothpaste. Baseline and post-bleaching color measurements were performed using a digital spectrophotometer. Following bleaching with 40% HP (Opalescence Boost 40% PF), the control group was brushed with distilled water, while the experimental groups were brushed with the respective toothpastes twice daily for 30 days using a rechargeable toothbrush. Final color measurements were recorded, and color changes (ΔE₀₀) were calculated using the CIE2000 formula. Data were analyzed using ANOVA and Tukey tests (P= 0.05).</p><p><strong>Results: </strong>The use of whitening toothpastes after bleaching significantly enhanced tooth color. Opalescence Whitening exhibited the greatest effect, followed by Colgate Optic White Expert. Signal White Now Gold demonstrated significantly higher efficacy than Ipana Kalsident Classic Taste. However, no significant difference was observed between the control group and Ipana.</p><p><strong>Clinical significance: </strong>This study demonstrated that whitening toothpastes play a beneficial role in maintaining and enhancing tooth color following in-office bleaching. Clinically, the use of an appropriate whitening toothpaste is recommended to prolong and optimize the results of bleaching procedures.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"124-128"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207389","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}

{"title":"The emerging role of oral microbiota: A key driver of oral and systemic health.","authors":"Domenico Azzolino, Alessia Felicetti, Luigi Santacroce, Tiziano Lucchi, Franklin Garcia-Godoy, Pier Carmine Passarelli","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To describe the existing literature on the emerging role of the oral microbiota in shaping both oral and systemic health.</p><p><strong>Methods: </strong>A narrative review was performed. PubMed, EMBASE and Scopus databases were searched for relevant articles published in the English language.</p><p><strong>Results: </strong>The oral microbiota plays a crucial role in both oral and systemic health, yet its composition and functions have been underexplored compared to the gut microbiota. The oral cavity harbors a diverse range of microorganisms, including bacteria, fungi, viruses, archaea, and protozoa, which interact within biofilms to influence oral health. The microbiome is influenced by various factors such as diet, oral hygiene, smoking, alcohol consumption, socioeconomic status, pregnancy, and genetics. Dysbiosis in the oral microbiota has been linked to a range of oral diseases, including dental caries, periodontal diseases, oral candidiasis, and even oral cancer. Additionally, oral bacteria can impact systemic health, with emerging associations to cardiovascular disease, respiratory conditions, and various cancers. Effective management of oral dysbiosis involves strategies such as mouthwashes, dietary modifications, and supplementation with probiotics and prebiotics, which can modulate the microbiota, enhance immune responses, and reduce pathogenic growth.</p><p><strong>Clinical significance: </strong>Oral microbiota dysbiosis, beyond its role in mediating oral diseases, is emerging as a driver of a range of systemic health conditions, including cardiovascular disease, respiratory conditions, and various cancers. A holistic approach combining regular oral hygiene, balanced nutrition, and microbiome-targeted interventions is essential for maintaining oral health and potentially preventing associated systemic diseases.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"111-116"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207390","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}

{"title":"Effects of energy and sports drinks on dentin surfaces.","authors":"Meltem N Polan, Aybuke Uslu Tekce, Cansu Atalay, Ayse Ruya Yazici, Gul Ozgunaltay","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the laboratory effects of various energy and sports drinks on the surface microhardness and roughness of dentin.</p><p><strong>Methods: </strong>60 extracted, sound bovine incisors were selected. After embedding the crown segments in acrylic resin blocks, the buccal surfaces were ground to expose a flat dentin surface. The dentin specimens were randomly divided into six groups (n=10): (DW) Distilled water (negative control), (M) Monster, (RB) Red Bull, (IS) Isostar, (PR) Powerade, and (CC) Coca-Cola (positive control). Following the initial microhardness and roughness measurements, the specimens were immersed in the beverages, with pH and titratable acidity (TA) values measured, three times a day for 20 minutes. After 7 days, final measurements were recorded. A single specimen from each group was examined under a scanning electron microscope. Data were analyzed using one-way ANOVA, Bonferroni, Tukey, and Games-Howell tests (P< 0.05).</p><p><strong>Results: </strong>All groups showed a significant reduction in microhardness, except for the DW group (P< 0.05). While there were no statistically significant differences between the RB and M groups (P> 0.05), significant changes in microhardness were observed between RB and the other tested groups (P< 0.05). An increase in surface roughness was observed in all tested groups except DW (P< 0.05). All the tested sports and energy drinks caused a reduction in surface microhardness and an increase in surface roughness. The consumption of these beverages may increase the risk of dental erosion.</p><p><strong>Clinical significance: </strong>The excessive consumption of sports and energy drinks might have harmful effects on dentin tissue. Individuals should be advised to limit their intake of such beverages.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 3","pages":"117-123"},"PeriodicalIF":0.9,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144207387","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}

{"title":"Comparison of fracture resistance values of Class 1 composite restorations made with incremental and snowplow techniques.","authors":"Rahime Zeynep Erdem, Ayşenur Kuşuçar, Semanur Özüdoğru, Hakan Arslan","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the effect of placing short fiber reinforced composites (SFRC) and posterior composites with different techniques on the fracture resistance of teeth: traditional incremental technique (IT), or snowplow (SP).</p><p><strong>Methods: </strong>Short fiber reinforced resin composite was applied using the incremental technique in SFRC-IT groups and the snowplow technique in SFRC-SP group. Teeth without any cavity formed the positive control group. The samples were exposed to various temperature changes with the application of thermal cycles and were then prepared for the fracture resistance test. Force values were recorded at the point of fracture. Data were analyzed using ANOVA with Tukey HSD (P =  0.05).</p><p><strong>Results: </strong>Significant differences in fracture resistance were determined between the groups. The Tukey HSD test showed that the fracture resistance of the SFRC-SP group was statistically significantly lower than that of the SFRC-IT it and positive control groups (P= 0.003).</p><p><strong>Clinical significance: </strong>Application of short fiber reinforced composite with the snowplow technique resulted in lower mechanical values, whereas application with the incremental technique provided high mechanical characteristics like those of the control group.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"46-50"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143964434","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}

{"title":"Influence of thickness on color, translucency, and fluorescence of bioactive restorative materials.","authors":"Ítalo C Carvalho, Rayssa C Barbosa, Carlos R G Torres, Alessandra B Borges, Mariane C Mailart","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the influence of thickness on the color, translucency, and fluorescence of bioactive restorative materials.</p><p><strong>Methods: </strong>Cylindrical specimens were prepared in 1 and 2 mm-thicknesses with bioactive materials (n= 12): bioactive composite (Activa BioACTIVE Restorative - ABR); alkasite (Cention N - CNN); glass-hybrid material (EQUIA Forte Fil - EFF); and bovine enamel/dentin - ED, as control. The color (CIELAB coordinates) of the specimens was measured using a spectrophotometer against a white and black background, and the translucency parameter (TP₀₀) was calculated. The fluorescence was assessed using a spectrofluorophotometer. Data were analyzed with two-way ANOVA and Tukey's test (α= 0.05).</p><p><strong>Results: </strong>ABR and CNN exhibited reduced L*, a* and b* values over a white background at 2 mm compared with 1 mm. No differences in CIELAB coordinates were detected between the thicknesses when materials were measured against the black background. For both thicknesses, ABR exhibited the highest TP₀₀ values, and EFF the lowest. At 2 mm, CNN and ED presented similar translucency. ED showed the highest fluorescence values, followed by ABR, CNN, and EFF. The thickness influenced CIELAB parameters of the bioactive materials tested only when a white background was used. The bioactive composite exhibited a reduction in both L* and b* values as the thickness increased. In contrast, alkasite reduced only in L*, while glass-hybrid decreased in b*. As the thicknesses increased, the translucency parameter decreased for the bioactive restorative materials. The thicknesses had no effect on fluorescence of the materials.</p><p><strong>Clinical significance: </strong>Variations in the thickness of bioactive materials affect CIELAB coordinates only when applied against a white background. Therefore, dentists should consider the intraoral background when using these materials. While thickness does not affect fluorescence, greater thickness reduces translucency.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"87-92"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143955369","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}