American journal of dentistry最新文献

{"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}

{"title":"Push-out force evaluation of titanium cylinders attached to implant supported immediate provisional heat-polymerized acrylic resin with various relining material types and thicknesses.","authors":"Burcu Kanat-Ertürk, Gökçe Zengin, Önjen Tak","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the laboratory push-out forces on titanium cylinders attached to immediate provisional heat-polymerized acrylic resins using different relining material types in varying thicknesses, and to investigate the fracture types.</p><p><strong>Methods: </strong>Heat-polymerized acrylic discs (Futura Basic Hot) (n= 105) were manufactured with artificial first molar teeth centered in each specimen (diameter: 24 mm, height:10 mm). Discs were drilled to create 6 mm, 8 mm and 10 mm diameter holes, corresponding to connection thicknesses of 1 mm, 2 mm, and 3 mm, respectively, around the 4 mm diameter titanium cylinders (n= 35/group). Each group was divided into five relining resin subgroups: Futura Basic Hot, Ufi Gel Hard, Qu-resin, Quick Up, and Pattern resin (n= 7/subgroup). Titanium cylinders were fixed into the holes, and the gaps were filled with relining resins. After 5,000 thermal cycles, a push-out test was performed (1 mm/minute). Data were analyzed with two-way ANOVA and Tukey post hoc tests (P= 0.05) and failure types were classified.</p><p><strong>Results: </strong>Resin types, connection thicknesses, and their interaction significantly affected the push-out forces (P< 0.05). Futura Basic Hot showed the lowest push-out forces (171 ± 39 N, 317 ± 131 N, and 144 ± 78 N, for 1 mm, 2 mm, and 3 mm connection thickness groups, respectively) (P< 0.05). Qu-resin and Pattern resin had the highest push-out force for 1 mm (1,235 ± 375 N and 1,576 ± 272 N, respectively) and 3 mm (1,333 ± 127 N and 1,406 ± 82 N, respectively) connection thicknesses. Qu-resin, Ufi Gel Hard, Pattern resin, and Quick Up (2,065 ± 342 N, 1,835 ± 630 N, and 1,626 ± 106 N, 1,501 ± 312 N, respectively) all performed well for 2 mm (Plt; 0.05). 2 mm connection thickness resulted in the highest push-out forces, except for Pattern resin. Qu-resin and Pattern resin are suitable for all connection thicknesses, while Ufi Gel Hard and Quick-Up perform optimally with connection thickness of 2 mm. Futura Basic Hot results in weaker push-out forces for implant-supported immediate provisional hybrid prostheses (IPHPs) fixation. 2 mm connection thickness is generally recommended for improved push-out force.</p><p><strong>Clinical significance: </strong>The choice of relining resin material and connection thickness significantly influence the push-out force on titanium cylinders attached to IPHPs. Selecting appropriate resin material types and thicknesses can enhance the long-term stability and clinical performance of IPHPs, reducing the risk of fractures during implant osseointegration period.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"93-99"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963324","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":"Microhardness, atomic force microscopy and profilometry of dental enamel conditioned with acetic and phosphoric acids.","authors":"Raúl Camacho Rodríguez, Miguel Á Araiza Téllez, Jacqueline A Rodríguez Chávez, Francisco J Alvarado López, Alvaro García Pérez","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the microhardness, microroughness, and topography of the enamel surface via Vickers microhardness, atomic force microscopy (AFM), and profilometry values before and after the use of 32% and 37% acetic acid and 32% phosphoric acid.</p><p><strong>Methods: </strong>Four groups were established: Group 1: control group; Group 2: phosphoric acid gel (Scotchbond Universal Etchant) at 32%; Group 3: 32% acetic acid gel; and Group 4: 37% acetic acid gel. The microhardness was determined with a Vickers indenter (VHN). The topography and microroughness of the enamel were analyzed using 3D images obtained via AFM in tapping mode. Microroughness was determined using a contact profilometer. An ANOVA and paired t-test was used to compare the average VHN and microroughness both before and after the etching of the enamel surface.</p><p><strong>Results: </strong>Statistically significant differences were found for average microhardness after the conditioning of the enamel surface of the four groups (P< 0.001). The roughness obtained via AFM revealed differences among the four groups after the use of the three different acid gels. The profilometry assay showed significant post-conditioning differences among all groups. Conditioning with 32% acetic acid partially modified the characteristics of the enamel surface to a greater extent than conditioning with 37% phosphoric acid; furthermore, the use of acetic acid generated microretentions that could be effective for adhesion.</p><p><strong>Clinical significance: </strong>Acetic acid, an organic biodegradable acid less corrosive than phosphoric acid, can be used to modify the characteristics of the enamel surface, such as microhardness, topography, and microroughness.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"100-104"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143962867","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":"Surface roughness of 3D printed and conventional interim restorative materials after dynamic loading.","authors":"Hatice B Özel, Ceren Küçük, Yelda Çiçek","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the surface roughness (Ra; µm) of three different interim resin materials, which were subjected to chewing simulation.</p><p><strong>Methods: </strong>Three interim resin materials were evaluated: (1) LCD type (liquid crystal displays) 3D printed (LCD, n= 10); (2) conventional autopolymerizing bis-acrylic (CO, n= 10); (3) DLP type (digital light processing) 3D printed (DLP, n= 10) interim resin materials. The specimens were subjected to 30,000 cycles of chewing simulation. The surface roughness of the materials was compared and scanning electron microscope (SEM) images representing each group were obtained. The Kruskal-Wallis and Mann-Whitney U test were carried out for comparison of the groups. Paired samples t test was used to compare the Ra values of each group separately before and after chewing simulation (α= 0.05).</p><p><strong>Results: </strong>The mean ± standard deviation values of baseline surface roughness values were 1.252 ± 0.426 for LCD printed resin, 0.715 ± 1.321 for conventional resin, 0.525 ± 0.963 for DLP printed resin. LCD group had the highest Ra 0 values. No statistically significant difference was observed between the CO and DLP group. After 30,000 cycles of simulated chewing, the mean surface roughness values for LCD, CO and DLP groups were 0.992 ± 0.160, 0.524 ± 0.288 and 0.542 ± 0.658, respectively. After chewing simulation, the difference among the Ra1 values of groups were statistically significant (P= 0.014). LCD group had the highest Ra1 values. No statistically significant difference was observed between the CO and DLP group. The difference of Ra values of all interim materials after chewing simulation compared to baseline were not statistically significant.</p><p><strong>Clinical significance: </strong>Since the results showed that the Ra values in this study were above the plaque accumulation threshold Ra of 0.20 µm and SEM images were consistent with the Ra measurements, care should be taken to adequately polymerize and polish the restoration surface, especially when it is being used for an extended period of time.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"67-70"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963061","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":"Evaluation of tooth color, whiteness changes and sensitivity following laser-assisted in-office tooth bleaching using Er,Cr:YSGG laser: A prospective clinical study.","authors":"Athina Tsaltampasi, Dimitrios Dionysopoulos, Dimitrios Strakas, Constantinos Papadopoulos, Effimia Koumpia, Pantelis Kouros, Moschos Papadopoulos, Kosmas Tolidis","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>This prospective clinical study evaluated the tooth color (ΔΕ*ab and ΔΕ₀₀) and whiteness (ΔWID) changes, as well as tooth sensitivity (TS) induced after performing in-office tooth bleaching with or without light-activation of the bleaching gel using Er,Cr:YSGG laser irradiation.</p><p><strong>Methods: </strong>20 subjects were enrolled for the study. The bleaching session was conducted with two 20-minute sessions of a 40% hydrogen peroxide bleaching agent assisted by Er,Cr:YSGG laser (2,780 nm) at the left hemiarch and without laser activation on the right hemiarch. ΔΕ*ab, ΔΕ₀₀ and ΔWID were evaluated in central incisors and canines using a clinical spectrophotometer immediately, 7 days and 30 days after the bleaching procedure. TS was evaluated during the bleaching treatments in both hemiarches of the patients using a visual analogue scale.</p><p><strong>Results: </strong>The results revealed a significant increase in tooth color and whiteness changes following the tooth bleaching in both laser-treated and conventional groups and in all teeth. Tooth color and whiteness changes were observed immediately after the different treatments and were gradually reduced after 7 and 30 days (P< 0.05). Between the conventional and laser-assisted technique, there were statistically significant differences only in canines (P< 0.05) and in lower central incisors (P< 0.05). Mild TS was noticed in 85% of the patients, without differences between the bleaching treatments (P> 0.05).</p><p><strong>Clinical significance: </strong>Er,Cr:YSGG laser-assisted tooth bleaching treatment may enhance tooth color and whiteness changes but not in all the examined tooth types, without inducing more intense tooth sensitivity compared to the conventional technique.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"71-78"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143963060","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 and temporary cement removal methods on microtensile bond strength of a universal resin cement.","authors":"Oğulcan Yücel, Muharrem Erhan Çömlekoğlu, Mine Dündar Çömlekoülu, Ege Çolak, Makbule Heval Şahan","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the impact of different surface cleaning methods and immediate dentin sealing (IDS) on the bond strength of a universal adhesive resin cement to dentin, using a 3D-printed restorative material.</p><p><strong>Methods: </strong>Extracted human third molars were prepared and divided into two groups: with and without IDS. Temporary restorations were cemented onto the prepared tooth surfaces. Five surface cleaning methods were applied to both groups: pumice, pumice with soap, sandblasting, EDTA, and laser. 3D printed resin blocks were fabricated and bonded to the teeth using a universal adhesive resin cement. After thermal cycling and water storage, microtensile bond strength tests were conducted. Failure modes were analyzed using light microscopy and SEM. Statistical analyses were made.</p><p><strong>Results: </strong>Microtensile bond strength (µTBS) was significantly influenced by both surface cleaning methods and IDS application. Sandblasting and laser cleaning resulted in the highest µTBS values, particularly when combined with IDS. IDS significantly increased µTBS compared to the control group, regardless of the cleaning method. SEM analysis revealed that adhesive failure was the predominant failure mode in most groups, with some mixed failures observed.</p><p><strong>Clinical significance: </strong>Prepared tooth surface cleaning procedures increased the microtensile bond strength of the universal adhesive resin cement regardless of immediate dentin sealing.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"79-86"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143953660","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":"Clinical effects of stannous fluoride dentifrice on peri-implant mucositis, plaque microbiome, and oxidative stress.","authors":"Malgorzata Klukoska, Niranjan Ramji, Alejandra Muñoz Bodnar, Ping Hu, Hao Ye, Sancai Xie, Lijuan Li, Julie Ashe, Tim Reichling, Jiazhen Wang, Kimberly Milleman, Jeffery Milleman","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>This single-center, single-treatment, 4-week study evaluated the efficacy of a stannous fluoride (SnF₂) dentifrice in reducing peri-implant mucositis while assessing changes in biomarkers and the oral microbiome profile.</p><p><strong>Methods: </strong>24 healthy participants 18 years of age or older with osseointegrated implants were included, with 19 participants having mucositis and five without mucositis. The non-mucositis participants served as a reference group for microbiome and biomarker assessments (baseline comparison). All participants used the same 0.454% SnF₂ dentifrice (Crest Pro-Health Sensitive and Enamel Shield) and a soft manual toothbrush twice daily throughout the study. Participants received Modified Gingival Index (MGI) and Gingival Bleeding Index (GBI) assessments at Baseline - Day 1 and at Week 4 - Day 1. Subgingival plaque and peri-implant crevicular fluid (PICF) were collected on Baseline - Day 2 and Week 4 - Day 2 for oxidative stress markers, bacterial endotoxins, proinflammatory cytokines and 16S analysis.</p><p><strong>Results: </strong>After 4 weeks, participants with mucositis experienced a significant reduction from baseline in MGI and GBI scores (63.4% and 79.3%, respectively) and in the number of bleeding sites (72.5% based on GBI analysis). Microbiome analysis of subgingival plaque showed that mucositis was associated with a higher relative abundance of disease-associated genera (Fusobacterium, Porphyromonas, Treponema, and Prevotella) and a lower relative abundance of commensal genera (Rothia and Actinomyces). Alpha diversity was higher in the mucositis group compared to the non-mucositis group at baseline. By Week 4, the profile of participants with mucositis had shifted to align more closely with that of non-mucositis participants. Participants with mucositis showed significant reduction in biomarkers related to bacterial insult, plaque virulence, oxidative stress, and inflammation. Simulated pathway and process analysis revealed that multiple categories of genes were associated with a state of mucositis, and 4 weeks of use of the experimental dentifrice downregulated several virulence-associated genes.</p><p><strong>Clinical significance: </strong>In participants with mucositis, use of a SnF₂ dentifrice for 4 weeks reduced clinical signs and key biomarkers of peri-implant inflammation and shifted the oral microbiome toward a healthier profile, highlighting the utility of SnF₂ dentifrice in the control of peri-implant mucositis.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 2","pages":"59-66"},"PeriodicalIF":0.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143958211","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":"Bond strength evaluation of universal adhesives applied in etch-and-rinse mode on sound and irradiated dentin.","authors":"Anh D Nguyen, Sina Brosheit, Dirk Vordermark, Kerstin Bitter, Reinhard Gerlach, Christian R Gernhardt","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the laboratory microtensile bond strength (µTBS) of universal adhesives applied in etch-and-rinse mode on irradiated and sound human dentin.</p><p><strong>Methods: </strong>Dentin specimens of 135 freshly extracted human third molars were divided in three superordinate groups. Each tooth received either no irradiation (control group), 5 Gy (2 Gy/2 Gy/1 Gy in 3 consecutive days) or the high-level therapeutic dose of 60 Gy (test groups) applied fractionally (2 Gy/day, 5 days/week, 6 weeks). Samples from each group were randomly divided into three subgroups assigned to three established universal adhesives (Futurabond U, AdheSE Universal, Xeno Select) in just the etch-and-rinse application mode (n= 15). Bond strength was assessed with a universal testing machine 15 minutes after application and light curing of the adhesive materials. Statistical analysis was performed using a two-way ANOVA (P< 0.01) and Tukey's test (P< 0.05).</p><p><strong>Results: </strong>Regarding all experimental groups ANOVA showed significant effects on µTBS of dentin irradiation and the used adhesives (P< 0.01, ANOVA). In nearly all groups, a decrease of µTBS was observed when used on highly irradiated dentin. However, comparing the different groups, no significant influence of high-level radiation on the microtensile bond strength of the three universal adhesives assessed in etch-and-rinse application mode could be determined (P> 0.05, Tukey's test).</p><p><strong>Clinical significance: </strong>Within the limitations of this laboratory study, no significant effects of low- and high-level tumor irradiation on the bond strength of universal adhesives can be detected after application in etch-and-rinse mode. Consequently, this mode of application may be considered a viable option for patients who have undergone radiation therapy when using universal adhesive systems for luting restorative materials.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 1","pages":"15-21"},"PeriodicalIF":0.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497785","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":"Efficacy of calculus removal with hand and ultrasonic instruments on titanium surfaces.","authors":"Maggie E Eslinger, Vrushali Abhyankar, Franklin Garcia-Godoy, Brian R Morrow, Pooja Ajitsankardas","doi":"","DOIUrl":"","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the impact of different instruments on dental implants on titanium discs and simultaneously test how effective they were in removing calculus.</p><p><strong>Methods: </strong>Artificial calculus was applied on 36 rectangular areas demarcated on titanium discs. Surface roughness was measured using a stylus profilometer. Calculus was then removed using six different hand or power-driven ultrasonic instruments. Surface roughness measurements D-Ra and D-Rz were then re-calculated. Cleaned distance was divided by total calculus to yield a cleaning ratio and the number of cleaning strokes required to remove the calculus was calculated. All measurements were statistically analyzed independently (two-way ANOVA, Holm-Sidak roughness and cleaning ratios Kruskal-Wallis one-way ANOVA on ranks, and Student-Newman-Keuls, α< 0.05).</p><p><strong>Results: </strong>Ultrasonic magnetostrictive instruments were most efficient in calculus removal and demonstrated a statistically high cleaning ratio percentage (P< 0.001) and required the least number of strokes compared to all the other groups. The resin curettes were the least effective in calculus removal and required the greatest number of strokes. When surface roughness values (D-Ra) were compared between different instruments, statistically significant differences were noted between the resin curettes and ultrasonic magnetostrictive groups, with the resin curette group showing lower values and the Ultrasonic magnetostrictive group showing greater values.</p><p><strong>Clinical significance: </strong>Current research on significance of titanium particles and their possible role in causing periimplantitis emphasizes the importance of using instruments that do not damage the implant surface. Instrumentation causing the least amount of surface roughness should be considered since the risk of damaging the surface outweighs the benefit.</p>","PeriodicalId":7538,"journal":{"name":"American journal of dentistry","volume":"38 1","pages":"22-26"},"PeriodicalIF":0.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143497837","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}