Operative Dentistry[JOURNAL]
Sun
200 papers
Posterior Cantilevered Single-Retainer All-Ceramic Resin-Bonded Fixed Dental Prostheses: A 12-Year Clinical Case and Proposed Clinical Recommendations.
Attal JP, Tirlet G, LeCorre M … +6 more , Boitelle P, Dursun E, Benoit A, Valtaud L, Caussin E, François P
Oper Dent · 2025 May · PMID 40458916 · Publisher ↗
OBJECTIVE: To present a clinical case featuring a posterior cantilevered single-retainer all-ceramic resin-bonded fixed dental prosthesis (PC-RBFDP) with 12 years of follow-up. This FDP was used to restore a missing prem...
OBJECTIVE: To present a clinical case featuring a posterior cantilevered single-retainer all-ceramic resin-bonded fixed dental prosthesis (PC-RBFDP) with 12 years of follow-up. This FDP was used to restore a missing premolar using a single-retainer canine abutment. The aim was also to draw clinical recommendations based on current data and experience. METHODS: To address the present case, the missing premolar was replaced with a stratified 3Y-TZP zirconia PC-RBFDP fabricated from a conventional impression using CAD-CAM technology. The prosthesis was bonded using a resin luting cement containing 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP), and the patient was reevaluated semi-annually. Insights obtained from this case, along with advancements in scientific understanding based on current data, are further explored. RESULTS: This clinical case, which occurred 12 years ago, was successful. Building on the insights gained from this case and subsequent ones, modifications to the preparation geometry have been implemented, informed by the in vitro biomechanical findings presented herein. Furthermore, a step-by-step clinical procedure is suggested, drawing from experience with other cases and the current literature on PC-RBFDPs. CONCLUSIONS: With a necessity of caution due to the limited evidence supporting this therapy, this clinical case shows promising results in the use of ceramic RBFDPs in the posterior region, providing an alternative to implants in contraindicated patients. The comprehensive approach shown in the step-by-step clinical case and the manuscript, including indication assessment, selection of bonding materials, ceramic choice, and preparation geometry, utilizes, to the best of our ability, the most current information and technology available. Continued research is needed to further validate this treatment modality.
Evaluation of Bond Strengths of Conventional and Self-Adhesive Cements in the Cementation of Fiberglass Posts: A Systematic Review and Meta-Analysis.
Heráclio ME, Nascimento AJ, Souza E Silva CG … +3 more , Assis CP, Braz R, Correia T
Oper Dent · 2025 May · PMID 40458915 · Publisher ↗
OBJECTIVE: To evaluate the bond strength of self-adhesive (no need for bonding procedures) and conventional (with total-etch or self-etch primers) cementation strategies and the qualitative variables that interfere with...
OBJECTIVE: To evaluate the bond strength of self-adhesive (no need for bonding procedures) and conventional (with total-etch or self-etch primers) cementation strategies and the qualitative variables that interfere with the adhesion of fiberglass posts through a systematic review and meta-analysis of in vitro studies. METHODS: This systematic review and meta-analysis was performed according to the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) and registered under the International Prospective Register of Systematic Reviews (PROSPERO). The research question was "What resin cement provides better bond strength between the fiberglass posts and the root dentin: conventional or self-adhesive?" The PubMed/MEDLINE, Web of Science, Scopus, and Cochrane databases were searched by two independent researchers. RESULTS: There were statistically significant differences between self-adhesive and conventional resin cements (p<0.00001), favoring conventional cements. CONCLUSION: Conventional cements presented the best results regarding the bond strength of the fiberglass post cementation. However, variations in methodology and the risk of bias in analyzed studies may have decreased the reliability of the present study. More studies on this subject using a leveled methodology are recommended.
Shear Bond Strength of Liner Materials to Caries-Free and Caries-Affected Dentin.
Greene ZK, Smith NR, Gomes T … +1 more , Lawson NC
Oper Dent · 2025 May · PMID 40458908 · Publisher ↗
BACKGROUND: Dental liners are used on caries-free dentin to attenuate postoperative sensitivity and caries-affected dentin to promote remineralization and for antibacterial effects. The shear bond strength of liners to c...
BACKGROUND: Dental liners are used on caries-free dentin to attenuate postoperative sensitivity and caries-affected dentin to promote remineralization and for antibacterial effects. The shear bond strength of liners to caries-affected and caries-free dentin is a significant clinical property in the restoration of teeth with large caries lesions. Objective: The aim of this in vitro study was to compare the shear bond strengths (SBS) of different liners to caries-free and caries-affected dentin. METHODS AND MATERIALS: SBS specimens were prepared according to ISO 29022:2013(E) (n=10/ group). Caries-free dentin specimens were ground to superficial dentin. For caries-affected dentin, grinding to proximity of carious dentin was performed, remaining caries-infected dentin was removed with a polymer bur, and sanding to 320 grit was conducted to achieve a flat surface. 150-micron thick tape was centered over caries-free or caries-affected dentin, and five different liners (new RMGI-based calcium silicate liner [RMGI/ CS], Biodentine, Lime-Lite Enhanced, TheraCal LC, Vitrebond Plus) were applied to dentin and leveled with the tape. Specimens were treated with adhesive, cured, and bonded with resin composite using the Ultradent fixture. Specimens were stored in 37°C water for 24 ± 2 hours and debonded at 1 mm/min. SBS was analyzed by two-way analysis of variance (ANOVA) and the Tukey post hoc test. RESULTS: There was a significant difference in SBS among materials for both caries-affected and caries-free dentin (p<0.01). Tukey post hoc analysis grouped materials into significantly different groups for caries-free dentin (Lime-Lite Enhanced, Biodentine < TheraCal LC < Vitrebond Plus, RMGI/CS) and caries-affected dentin (Lime-Lite Enhanced, Biodentine, TheraCal LC < Vitrebond Plus, RMGI/CS). There was no difference in SBS to caries-free and caries-affected dentin for Lime-Lite Enhanced (p=0.359), Biodentine (p=0.522), Vitrebond Plus (p=0.406), or RMGI/CS (p=0.165). SBS was significantly greater to caries-free dentin with TheraCal LC (p<0.01). CONCLUSIONS: RMGI/CS and Vitrebond Plus produced higher SBS to caries-free and caries-affected dentin than the three other materials. There was a higher bond to caries-free dentin than caries-affected dentin for TheraCal LC, but not for any of the other liners tested. Clinicians should balance biologic advantages of liner materials with a decrease in bond strength.
Mapping Funding Assistance for Bulk-fill Resin Composites: A Bibliometric Analysis of Published Studies Between 2014 and 2023.
Miranda SB, Montes M, Borges GA … +3 more , Santi MR, Silva M, Lins R
Oper Dent · 2025 May · PMID 40458906 · Publisher ↗
OBJECTIVE: The aim of this bibliometric analysis was to investigate the prevalence of bibliometric parameters related to clinical trials with bulk-fill resin composites according to financial assistance over time. METHOD...
OBJECTIVE: The aim of this bibliometric analysis was to investigate the prevalence of bibliometric parameters related to clinical trials with bulk-fill resin composites according to financial assistance over time. METHODS: Five electronic databases were accessed (PubMed/MEDLINE, Embase, The Cochrane Library, Virtual Health Library, and Scopus) and seven bibliometric parameters related to geographic origin, year, impact factor, and publication details related to bulk-fill resin composite restorations and their clinical performance were considered. The prevalence ratio was applied using Poisson multiple regression analysis (α=0.05) to assess the association between funding and associated bibliometric parameters. RESULTS: In total, 59 clinical trials that analyzed the clinical performance of restorations with bulk-fill resin composites were published between 2014 and 2023 and were evaluated bibliometrically; 40.7% (n=24) of the studies reported financial assistance. Financing was associated with bibliometric parameters related to the consistency of the materials, specifically with studies involving sculptable and flowable composites funded more frequently (p<0.001) than studies evaluating only sculptable consistency. Studies that analyzed class I and II cavities showed greater financial assistance (p=0.028) compared to class I cavities, and financing increased as the journal's impact factor increased (p=0.013). CONCLUSIONS: Financial assistance of clinical trials evaluating bulk-fill resin composite restorations was associated with material consistency, tooth cavity design, and journal impact factor bibliometric parameters.
Does Patient Age Impact In-Office Tooth Bleaching Outcomes? A Parallel Clinical Trial.
Martins JL, Araújo IS, Rabelo JF … +6 more , Soares CJ, Faria-E-Silva AL, Loguercio AD, Filho P, Carlo HL, da Silva GR
Oper Dent · 2025 May · PMID 40458905 · Publisher ↗
OBJECTIVES: To assess the influence of patient age on tooth sensitivity, bleaching effectiveness, and the self-perception and psychosocial impact of dental esthetics following in-office tooth bleaching with 35% hydrogen...
OBJECTIVES: To assess the influence of patient age on tooth sensitivity, bleaching effectiveness, and the self-perception and psychosocial impact of dental esthetics following in-office tooth bleaching with 35% hydrogen peroxide. METHODS: This parallel study categorized 56 subjects by age into early adulthood (18-25 years) and middle-aged (40-65 years) groups. The bleaching agent was applied in a single 45-minute session, spanning two bleaching sessions at a 1-week interval. Bleaching effectiveness assessment used upper incisors and canines. A shade guide (VITA Bleachedguide 3D-MASTER) and a portable spectrophotometer evaluated color changes. A visual analog scale and verbal rating scale recorded tooth sensitivity during and up to 48 hours after the bleaching procedure. The Psychosocial Impact of Dental Aesthetics Questionnaire measured the self-perception and psychosocial impact of the bleaching protocol. Student t-test, Fisher exact test, Mann-Whitney, multivariate analysis of variance, chi-square, two-way repeated measures analysis of variance, and the Wilcoxon test (α=0.05) verified the data. RESULTS: Early adulthood subjects demonstrated a significant increase (17%) in the risk of tooth sensitivity (p=0.038), and the highest pain levels occurred 1 hour after the bleaching session (p<0.01). Nonetheless, early adulthood subjects showed improved bleaching effects 30 days after the procedure when compared to the middle-aged subjects, even though the overall perception of the psychosocial impact of dental esthetics was more evident in middle-aged subjects. CONCLUSIONS: Patient age influenced in-office bleaching outcomes. Both age groups reported esthetic satisfaction, but early adulthood subjects (18-25 years) experienced a more substantial whitening effect, greater dentin sensitivity, and higher psychological impact. Conversely, middle-aged subjects (40-65 years) had a better overall perception of the psychosocial impact of dental esthetics.
Effects of Catalyst Bioproducts on In-Office Whitening: A Randomized, Split-mouth Clinical Analysis.
Bueno Esteves LM, de Souza Costa CA, de Oliveira Ribeiro RA … +5 more , Seicento Aidar KM, de Oliveira Santos A, Catelan A, Dos Santos PH, Briso A
Oper Dent · 2025 May · PMID 40458904 · Publisher ↗
OBJECTIVES: To compare conventional hydrogen peroxide (H2O2) whitening therapy (CT) applied for 45 minutes with a test therapy (TT) containing H2O2 whitening gel and catalyst bioproducts applied for 15 minutes. METHODS:...
OBJECTIVES: To compare conventional hydrogen peroxide (H2O2) whitening therapy (CT) applied for 45 minutes with a test therapy (TT) containing H2O2 whitening gel and catalyst bioproducts applied for 15 minutes. METHODS: Thirty patients and their hemiarches were randomly divided into two groups: CT: application of 35% H2O2 three times for 15 minutes; test therapy (TT): based on the prior application of a polycaprolactone scaffold and the addition of 10 mg of peroxidase to the 35% whitening gel (3 drops of thickener, 9 drops of peroxide and 10 mg of peroxidase) for an exposure time of 15 minutes.The two treatments were carried out in three whitening sessions, 7 days apart. The chromatic change (ΔE00) and the bleaching index (ΔWID) were analyzed by spectrophotometry. Spontaneous sensitivity was assessed through a questionnaire, and thermal sensitivity was provoked through thermal stimuli after the three sessions and 14 days later. Esthetic self-perception was also measured using the Orofacial Esthetics Scale before and after each session. RESULTS: After the first session, CT exceeded TT in ΔE00 and ΔWID, whereas they were equal at the other time points. Greater intensity and occurrence of spontaneous sensitivity occurred in the first and second sessions with CT. The CT group experienced thermal sensitivity at higher temperatures than the TT group at all times analyzed. Esthetic self-perception was higher (66.6%) in the TT group. CONCLUSION: The test therapy can achieve the same whitening effect with less total exposure time and less tooth sensitivity than the conventional technique.
Clinical Longevity of Complex Direct Posterior Resin Composite and Amalgam Restorations: A Systematic Review and Meta-analysis.
Santos M, Saadaldin S, Rêgo H … +3 more , Tayan N, Melo NM, El-Najar M
Oper Dent · 2025 Sep · PMID 40458903 · Publisher ↗
OBJECTIVE: The use of resin composites (RC) for complex restorations, including those involving cusp coverage, has increased dramatically in recent years. However, reports in the literature regarding the performance of p...
OBJECTIVE: The use of resin composites (RC) for complex restorations, including those involving cusp coverage, has increased dramatically in recent years. However, reports in the literature regarding the performance of posterior multisurface RC and amalgam (AM) restorations show conflicting results. This systematic review and meta-analysis aims to assess the clinical performance of complex (involving two or more surfaces) direct posterior resin composite and amalgam restorations in permanent teeth. METHODS: Inclusion criteria were for prospective randomized controlled trials (RCTs) of multisurface direct RC and AM restorations of permanent posterior teeth with a follow-up period of three years or more. The trials needed to include a minimum of 20 restored teeth for each evaluated material. Retrospective studies, studies lacking survival rates or clearly reported reasons for failure, and those with unclear randomization methods were excluded. Five bibliographic databases (Medline-OVID, Embase, Cochrane Library, Web of Science, and LILACS [Latin American and Caribbean Health Sciences Literature Database]) and manual searches were screened. The Cochrane Risk of Bias Tool was used to assess the included studies. Random-effects meta-analyses were conducted using the Freeman-Tukey double arcsine transformation and the DerSimonian-Laird random-effects model to evaluate restorative failures and compare the survival of AM and RC restorations. RESULTS: From the 6303 identified studies, 198 underwent meticulous examination, and 15 RCTs met the inclusion criteria. Only two studies compared AM and RC restorations. Although the combined data from these studies showed a trend toward higher failure rates in multisurface RC restorations, the difference was not statistically significant (p=0.06). The most common reasons for the failure of RC restorations were secondary caries, restoration fracture, and tooth fracture. For AM, the most common reasons for failure were secondary caries and tooth fracture. CONCLUSIONS: The quality of the evidence was low. The scarcity of studies comparing RC and AM in complex restorations has resulted in insufficient evidence to substantiate superior performance by either material.
Combined Orthodontic, Orthognathic Surgical, and Prosthodontic Treatment for Severe Class III Malocclusion Using Digital Workflows.
Szegedi L, Rózsa NK, Nemes B … +7 more , Lőrincz G, Kreuter P, Végh D, Róth I, Bogdán S, Hermann P, Géczi Z
Oper Dent · 2025 Mar · PMID 40193559 · Publisher ↗
The patient underwent combined orthodonticorthognathic surgical treatment due to her skeletal Class III malocclusion. In the first phase, orthodontic decompensation was performed with maxillary and mandibular fixed appli...
The patient underwent combined orthodonticorthognathic surgical treatment due to her skeletal Class III malocclusion. In the first phase, orthodontic decompensation was performed with maxillary and mandibular fixed appliances. The maxillary first premolars were extracted; the created space was closed by anterior retraction. The posterior anchorage was reinforced with interradicular temporary anchorage devices. In the second phase, a digital surgical treatment plan was made with intra- and extraoral simulation (including occlusion and profile). During the orthognathic surgery, a bilateral sagittal split osteotomy with mandibular setback was combined with maxillary movements, using 3D-printed surgical splints. In the third phase, the orthodontic treatment continued to finish and settle the occlusion. Spaces were created between the upper incisors for ceramic veneers to gain proper overjet and occlusion. The last phase was prosthetic and esthetic rehabilitation. During the planning, a 2Dand 3D-smile design was created and presented to the patient as a mock-up. After digital impression and design, four E-max veneers were milled and cemented using dual cement to finish the workflow. Retention splints were created to preserve the new status as a final step.
Clinical Evaluation of an Alkasite-Based Resin Composite in Class I and II Cavities Conditioned with Self-Curing Primer: Preliminary Results up to One Year.
Gözetici-Çil B, Ballı-Akgöl B, Üstün N … +3 more , Kuşdemir M, Öztürk-Bozkurt F, Özcan M
Oper Dent · 2025 Mar · PMID 40193558 · Publisher ↗
OBJECTIVES: Simplified application and caries preventive features are desired properties for an ideal dental restorative material. Therefore, the aim of this study was to evaluate the clinical performance of a newly deve...
OBJECTIVES: Simplified application and caries preventive features are desired properties for an ideal dental restorative material. Therefore, the aim of this study was to evaluate the clinical performance of a newly developed bioactive alkasite-based resin composite (Cention Forte, Ivoclar Vivadent, Schaan, Liechtenstein) with these properties. METHODS: Vital teeth with class I or II restoration need were included in the study. A total of 49 patients received 90 posterior restorations. Extension for retention and beveling were avoided during cavity preparation. The primer (Cention Primer, Ivoclar Vivadent) for alkasite restorative materials was applied prior to restoration placement. Two independent observers made the evaluations using the FDI criteria (scores 1-5) for esthetic, functional, and biological properties. Patients were recalled after three to four weeks (baseline) and one year. Wilcoxon signed rank test was used to evaluate the differences between FDI scores at baseline and after one year. RESULTS: Ninety restorations at baseline and 86 restorations at one year were evaluated. The overall success rate of the restorations was 98.8%, and the overall survival rate was 100% after one year in function. Only one restoration was clinically unacceptable (FDI score 4) due to a small material chip after one year. CONCLUSIONS: Quality of the restorations was unaffected in terms of marginal adaptation, marginal discoloration, and secondary caries formation, whereas color and surface luster of the restorations deteriorated slightly over time. No retention loss or tooth fracture was observed.
Radiopacity and Filler Content of Dual-Cure Resin Core Material, Dual-Cure Resin Cement, and Bulk-Fill Resin Composites Used for Restoring Endodontically Treated Teeth.
Mendoza L, Peres TS, Estevão I … +2 more , Carlo HL, Soares CJ
Oper Dent · 2025 Mar · PMID 40193557 · Publisher ↗
OBJECTIVE: This study evaluated the effect of filler content and composition on the radiopacity of different resin-based materials used to cement fiberglass posts (dual-cure resin cements or dual-cure resin core material...
OBJECTIVE: This study evaluated the effect of filler content and composition on the radiopacity of different resin-based materials used to cement fiberglass posts (dual-cure resin cements or dual-cure resin core materials) and build the core (bulk-fill or dual-cure core resin composites) to restore endodontically treated teeth. METHODS AND MATERIALS: Nine resin-based materials were tested: Four dual-cure resin core materials: Allcem Core, FGM; LuxaCore Z, DMG; Rebilda DC, VOCO; and Clearfil DC Core Plus, KURARAY; three dual-cure resin cements: RelyX Universal, 3M Oral Care; RelyX U200, 3M Oral Care; and Allcem Dual, FGM; and two bulk-fill resin composites: OPUS Bulk Fill APS, FGM; and Filtek One Bulk Fill, 3M Oral Care. Thermogravimetric analysis (TGA, %) was performed to determine the filler content. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to evaluate the filler morphology and composition. Radiopacity was measured using digital radiographs (n=10) according to ISO 4049 standards. TGA and radiopacity data were subjected to a one-way analysis of variance (ANOVA) followed by a Tukey post hoc test (α=0.05). RESULTS: Except for Luxacore Z, the dual-cure resin core materials and bulk-fill resin composites had higher filler contents than the dual-cure resin cements (p<0.001). Allcem Core exhibited more homogeneous fillers without agglomerates, whereas RelyX Universal presented only nanoparticles. OPUS Bulk Fill APS, Allcem Dual, and Allcem Core, made by the same manufacturer, presented similar sizes, shapes, and distributions of filler content. EDS analysis revealed that oxygen O (8), Si (14), C (6), Al (13), and Ba (56) were the most prevalent elements. The radiopacity of the tested materials is related to the presence of high atomic number elements such as Yr (70), La, (57), Ba (56), Zr (40), Sr (38), and Br (35) in their filler composition. All materials satisfied the ISO 4049 radiopacity requirements. CONCLUSIONS: Results were product-specific. Except for LuxaCore Z and Allcem Core, dual-cure resin core materials exhibited filler content similar to that of bulk-fill resin composites and higher than that of dual-cure resin cements. All materials exceeded the ISO 4049-2019 standard for radiopacity of restorative materials.
Potential of Acacia Extract as a Collagen Crosslinker and Stabilizer of the Resin-dentin Interface.
Rio MC, Souto AA, Marcondes ML … +3 more , Bittencourt HR, Burnett LH, Spohr AM
Oper Dent · 2025 Mar · PMID 40193554 · Publisher ↗
The aim of this study was to investigate whether different concentrations of acacia extract could improve the biological stability of dentin collagen. Slice (n=3) and beam (n=5) samples of dentin obtained from human thir...
The aim of this study was to investigate whether different concentrations of acacia extract could improve the biological stability of dentin collagen. Slice (n=3) and beam (n=5) samples of dentin obtained from human third molars were demineralized and treated with the following solutions: G1 (control)-deionized water; G2- 1% acacia extract; G3-2% acacia extract; and G4-3% acacia extract. The dentin slices were analyzed by Fourier transform infrared (FTIR) spectrophotometry to observe their interactions with collagen. The beams were submitted to digestion with type I bacterial collagenase solution, and the percentage of weight was calculated to evaluate the resistance to enzymatic biodegradation. The Adper Scotchbond Multipurpose adhesive system was applied on the flat dentin surfaces according to the manufacturer's recommendations (G1). In groups G2, G3 and G4, acacia extract at concentrations of 1%, 2%, and 3%, respectively, were applied after acid etching. A resin composite block was built on the adhesive, and the teeth were cut to obtain beams (n=7 teeth; ~12 beams per tooth) with cross-sectional areas of approximately 0.8 mm2. Half of the specimens were submitted to the microtensile bond strength (μTBS) test in a universal testing machine at a crosshead speed of 0.5 mm/min, and the other half were submitted to the μTBS test after six months of storage in distilled water. FTIR analysis showed the interactions of the three concentrations of acacia extract with collagen. According to ANOVA and Tukey tests, G1 had the highest biodegradation rate (100%), which was significantly higher than the rates of G2 (24%), G3 (23%) and G4 (17%) (p<0.05). According to twoway ANOVA and Tukey tests, only G1 showed a significant decrease in μTBS after six months of storage (p<0.05). It was concluded that 1%, 2%, and 3% acacia extract all interacted with human dentin collagen, reduced collagen biodegradation and favored the stabilization of the bonding interface at the six-month evaluation.
Fifty Years of Teaching Operative Dentistry - My Reflections.
Denehy G
Oper Dent · 2025 Mar · PMID 40193553 · Publisher ↗
Abstract loading — click title to view on PubMed.
Effects of Experimental Nanohydroxyapatite Gel on Enamel Surface After Bleaching.
Dicle AT, Dalkılıc EE, Akyol E
Oper Dent · 2025 Mar · PMID 40193552 · Publisher ↗
The purpose of this study was to investigate the effect of chitosan-added experimental nanohydroxyapatite (n-HA) gel on the physical and morphological changes of the enamel surface after the use of two different vital bl...
The purpose of this study was to investigate the effect of chitosan-added experimental nanohydroxyapatite (n-HA) gel on the physical and morphological changes of the enamel surface after the use of two different vital bleaching agents. Fifty-two intact, caries-free human maxillary incisors were embedded in acrylic resin. Chitosan-added n-HA powder was synthesized using a high-temperature oxidation method and then mixed with phosphate-buffered saline solution (PBS) to form a gel. The teeth were divided into four groups: Group B: Biowhiten in-office 40% n-HP (BioWhiten, Biodent Ltd, Istanbul, Turkey); Group O: Opalescence Boost 40% HP (Ultradent Products Inc., South Jordan, UT, USA); Group BN: Biowhiten in-office 40% n-HP+n-HA gel; Group ON: Opalescence Boost 40% HP+n-HA gel. Color change, surface microhardness, and surface roughness (Ra) measurements were taken before, immediately after, and one week after bleaching. Three specimens from each group were also subjected to scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS) analysis. The data were statistically analyzed using an analysis of variance (ANOVA) and Bonferroni post hoc test (p<0.05). After bleaching, all groups showed a noticeable change in color (p<0.05), but with no differences among the treatment groups (p>0.05). After bleaching, the highest Ra values were determined in Group O (p<0.05). Group ON showed a statistically lower Ra value than Group O (p<0.05). The lowest microhardness value after bleaching was observed in Group O (p<0.05), which also had the lowest calcium/phosphorus (Ca/P) value. After the experimental chitosan-added n-HA gel application, the Ca/P ratio increased. The use of experimental chitosan-added n-HA gel after bleaching improved the physical and morphological properties of the enamel surface without reducing the effectiveness of bleaching.
Effects of Detox Juices on Color Stability and Surface Roughness of Universal Chromatic Resin Composites.
Yenidunya OG, Misilli T
Oper Dent · 2025 Mar · PMID 40193551 · Publisher ↗
This study investigated the color stability and surface roughness of universal chromatic resin-based composites (RBCs) after immersion in detox juices. One hundred seventy-six disc-shaped specimens (8 mm in diameter and...
This study investigated the color stability and surface roughness of universal chromatic resin-based composites (RBCs) after immersion in detox juices. One hundred seventy-six disc-shaped specimens (8 mm in diameter and 2 mm in thickness) were prepared using four universal chromatic RBCs: NeoSpectra ST (NS), Omnichroma (OM), Charisma Topaz One (CO), and G-ænial Universal Injectable (GI). Specimens of each material were randomly divided into four subgroups (n=11) and immersed in either the assigned detox juices (red, green, or yellow) or distilled water (control). Color and surface roughness measurements were taken at baseline, 15 and 30 days of immersion. Scanning electron microscopy (SEM) was used to evaluate the surface topography of the composites. The color change [CIEDE2000 (ΔE00)] and surface roughness (Ra) values were analyzed using generalized linear models and multiple comparison tests with Bonferroni correction. Correlation analysis was performed using Spearman rank correlation test. The main variable effects of "composite and immersion media" were significant for both color change and surface roughness parameters (p<0.001). Additionally, the main effect of the "evaluation period" was significant only for surface roughness (p=0.001). The highest discoloration occurred in the GI group immersed in a red beverage, while the CO group immersed in yellow beverage had the highest Ra values. In SEM analysis, OM demonstrated a more homogeneous filler structure with clearly visible nano-spherical fillers and nanoclusters, contributing to its superior smoothness. Conversely, a significant increase in rough areas was observed, especially in NS exposed to the green beverage and CO exposed to the yellow beverage, after 30 days. While the immersion of resin composites in detox juices induced an acceptable color alteration except for OM and GI groups immersed in the red beverage, all tested materials exhibited clinically admissible results regarding surface roughness.
Celebrating Excellence.
Diefenderfer K
Oper Dent · 2025 Mar · PMID 40193550 · Publisher ↗
Abstract loading — click title to view on PubMed.
Evaluation of Glazing and Polishing for Novel Chairside CAD/CAM Lithium Disilicate Containing Virgilite Crystals.
Abuhammoud S, Apiazu-Flores FX, Jurado CA … +3 more , Rojas-Rueda S, Fischer NG, Afrashtehfar KI
Oper Dent · 2025 Mar · PMID 39910759 · Publisher ↗
This comparative in vitro study evaluated surface treatment methods for chairside CAD/CAM lithium disilicate enriched with virgilite using atomic force microscopy (AFM) imaging. Specimens were fabricated from two lithium...
This comparative in vitro study evaluated surface treatment methods for chairside CAD/CAM lithium disilicate enriched with virgilite using atomic force microscopy (AFM) imaging. Specimens were fabricated from two lithium disilicate materials: the traditional material (IPS e.max CAD, Ivoclar Vivadent, Schaan, Liechtenstein) and a virgilite-containing material (CEREC Tessera, Dentsply Sirona, Charlotte, NC, USA). Surface roughness (Ra) [in micrometers (μm)] was quantitatively assessed with AFM. The results demonstrated that IPS e.max CAD with glazing exhibited the smoothest surface with the lowest Ra values (10.03 ± 5.03 μm). In contrast, CEREC Tessera exhibited the highest surface roughness when treated with glazing (51.98 ± 12.31 μm), while the zirconia polishing system provided a smoother surface (15.44 ± 9.69 μm).
Potential of Acacia Extract as a Collagen Crosslinker and Stabilizer of the Resin-dentin Interface.
Rio MC, Souto AA, Marcondes ML … +3 more , Bittencourt HR, Burnett LH, Spohr AM
Oper Dent · 2025 Feb · PMID 39910756 · Publisher ↗
The aim of this study was to investigate whether different concentrations of acacia extract could improve the biological stability of dentin collagen. Slice (n=3) and beam (n=5) samples of dentin obtained from human thir...
The aim of this study was to investigate whether different concentrations of acacia extract could improve the biological stability of dentin collagen. Slice (n=3) and beam (n=5) samples of dentin obtained from human third molars were demineralized and treated with the following solutions: G1 (control)-deionized water; G2-1% acacia extract; G3-2% acacia extract; and G4-3% acacia extract. The dentin slices were analyzed by Fourier transform infrared (FTIR) spectrophotometry to observe their interactions with collagen. The beams were submitted to digestion with type I bacterial collagenase solution, and the percentage of weight was calculated to evaluate the resistance to enzymatic biodegradation. The Adper Scotchbond Multipurpose adhesive system was applied on the flat dentin surfaces according to the manufacturer's recommendations (G1). In groups G2, G3 and G4, acacia extract at concentrations of 1%, 2%, and 3%, respectively, were applied after acid etching. A resin composite block was built on the adhesive, and the teeth were cut to obtain beams (n=7 teeth; ~12 beams per tooth) with cross-sectional areas of approximately 0.8 mm2. Half of the specimens were submitted to the microtensile bond strength (µTBS) test in a universal testing machine at a crosshead speed of 0.5 mm/min, and the other half were submitted to the µTBS test after six months of storage in distilled water. FTIR analysis showed the interactions of the three concentrations of acacia extract with collagen. According to ANOVA and Tukey tests, G1 had the highest biodegradation rate (100%), which was significantly higher than the rates of G2 (24%), G3 (23%) and G4 (17%) (p<0.05). According to two-way ANOVA and Tukey tests, only G1 showed a significant decrease in µTBS after six months of storage (p<0.05). It was concluded that 1%, 2%, and 3% acacia extract all interacted with human dentin collagen, reduced collagen biodegradation and favored the stabilization of the bonding interface at the six-month evaluation.
Effect of Cement Type on Marginal Microleakage of Zirconia Crowns with or without Cervical Margin Relocation: An In Vitro Study.
Farah RI
Oper Dent · 2025 Mar · PMID 39905813 · Publisher ↗
This study evaluated the microleakage in zirconia crowns cemented with bioactive vs resin cements at two margin locations: cementum/dentin deep margin and composite-elevated margins. Standardized mesial box cavities were...
This study evaluated the microleakage in zirconia crowns cemented with bioactive vs resin cements at two margin locations: cementum/dentin deep margin and composite-elevated margins. Standardized mesial box cavities were prepared in 30 molar teeth, with proximal cavosurface margins placed 1 mm below the cemento-enamel junction (CEJ) and restored with resin composite. The teeth were prepared for zirconia crowns, with mesial margins on the composite and distal margins on tooth structure 1 mm below the CEJ. Following digitization and zirconia crown fabrication, the specimens were randomly allocated into five groups based on the type of cement used: one multistep adhesive resin, one self-adhesive resin, one bioactive hybrid ionic resin, and two bioceramic cements. Microleakage was evaluated by measuring the percentage of dye penetration depth at the interfaces, with data analyzed using two-way ANOVA. The results revealed a significant interaction between cement type and margin location, with elevated margins exhibiting less leakage than deep ones across all cement types (p≤0.001). However, the effect of margin location on microleakage varied depending on the cement type, with variations in microleakage scores at each margin location ranging from statistically nonsignificant (p>0.05) to statistically significant (p≤0.05). Adhesive resin and hybrid bioactive cements significantly outperformed others in reducing microleakage at both margin interfaces.
Resin Composite Depth of Cure Through Transparent Matrix Materials Used for Injection Molding.
Lawson NC, Greene Z, Machado N … +3 more , Tadros D, Robles A, Rocha M
Oper Dent · 2025 Mar · PMID 39905809 · Publisher ↗
OBJECTIVES: The purpose of this study was to compare the curing light transmittance and depth of cure (DOC) of resin composite through clear polyvinyl siloxane (PVS) impression materials and 3D printed clear matrix mater...
OBJECTIVES: The purpose of this study was to compare the curing light transmittance and depth of cure (DOC) of resin composite through clear polyvinyl siloxane (PVS) impression materials and 3D printed clear matrix materials at various thicknesses. METHODS AND MATERIALS: Cylindrical specimens (n=6) of three clear PVS materials (Affinity Crystal, Clear Bite Matrix, Exaclear) were fabricated in Teflon molds, and two 3D-printed clear matrix materials (Filtek matrix, IDB 2) were printed into specimens of five different thicknesses (2 mm, 4 mm, 6 mm, 8 mm, 10 mm). To measure light irradiance transmittance, specimens were placed on a radiometer (CheckUp), allowing the transmitted irradiance from a light-curing unit (Elipar DeepCure-S, 1450 mW/cm²) to be recorded. DOC of resin composite specimens was measured by placing flowable composite (PVS and IDB 2) or heated conventional composite (Filtek Matrix) into a split metal die with a 4 mm diameter opening. The composite was cured through the different matrix specimens using the Elipar DeepCure-S curing light for the manufacturer's recommended curing time (10 seconds) or double the curing time (20 seconds). The DOC of the composite specimens was measured according to ISO 4049 7.8, and the percentage of total cure (%TC) was calculated by dividing by the total cure (DOC with no matrix and 10-second cure). The correlation between irradiance transmittance and %TC was analyzed with Pearson's coefficient. For each matrix material, the %TC was compared to the total cure of the material using a Dunnett's test. The compressive modulus of each material was measured and compared with a one-way ANOVA. RESULTS: There was a statistically significant, strong positive correlation between irradiance transmittance and %TC for 10 seconds (r=0.90 p<0.001) and 20 seconds (r=0.89 p<0.001). There was not a statistically different DOC for the total cure with Affinity (2 mm), Clear Bite (2 mm), Exaclear (2, 4, 6 mm), IDB2 (2, 4, 6, 8 mm), and Filtek Matrix (2,4 mm) if a 20-second cure was used. CONCLUSIONS: Decreased light irradiance from curing through clear matrix materials decreases the DOC of resin composites. Doubling the curing time when curing through some matrix materials at certain thicknesses allowed a total cure.
Influence of Glass Ionomer-based Luting Cements on the Clinical Success of Zirconia Crowns: Randomized Clinical Trial.
Torres C, Mailart MC, Ávila D … +7 more , Barbosa A, Pinatti R, Lopes SR, Santos T, Moecke SE, Di Nicoló R, Borges AB
Oper Dent · 2025 Mar · PMID 39905803 · Publisher ↗
OBJECTIVE: This study evaluated the influence of two types of glass ionomer-based luting agent on the clinical performance of metal-free zirconia crowns. METHODS AND MATERIALS: Thirty participants received two full crown...
OBJECTIVE: This study evaluated the influence of two types of glass ionomer-based luting agent on the clinical performance of metal-free zirconia crowns. METHODS AND MATERIALS: Thirty participants received two full crown restorations in either anterior or posterior teeth, in a split-mouth design. After tooth preparation, impressions with addition-cured silicone were made and casts were obtained. The casts were scanned and 3Y-TZP zirconia copings (Ceramill ZI - Amann Girrbach) were milled using a CAD/CAM system. Glass ceramic (IPS E.max Ceram, Ivoclar Vivadent) was used to create the crown shape. For each participant, one crown was cemented using a conventional glass ionomer (GIC - Meron, Voco), while the other received a resin-modified glass ionomer cement (RMGIC - Meron Plus QM, Voco). The restorations were evaluated by two calibrated examiners after seven days, one year, and two years. The parameters at each evaluated time were analyzed by the Fisher exact test (α=0.05). RESULTS: At two years postoperatively, 24 participants attended the recall, and 46 (76.67%) restorations were evaluated. No fractures or secondary caries were diagnosed. Minimal marginal staining was verified in both cements. During the follow-up period, only two anterior crowns cemented with conventional glass ionomer showed loss of retention. No loss of retention was detected in posterior crowns. CONCLUSION: After two years of intraoral service, the crowns cemented with either conventional glass ionomer cement or resin-modified glass ionomer presented acceptable and similar clinical performance for all parameters analyzed in both anterior and posterior teeth.
About
- Frequency
- Sun
- Papers found
- 200
- RSS feed
- Subscribe