Journal of prosthodontic research最新文献

{"title":"Impacts of clinical factors on accuracy in static, dynamic, and robotic-assisted implant surgery: A comparative narrative review.","authors":"Angkoon Khaohoen, Nobuhiro Yoda, Pinyo Puangmali, Chaiy Rungsiyakull, Pimduen Rungsiyakull","doi":"10.2186/jpr.JPR_D_25_00079","DOIUrl":"10.2186/jpr.JPR_D_25_00079","url":null,"abstract":"<p><strong>Purpose: </strong>This review examined clinical and technological factors that influence implant placement accuracy in computer-assisted implant surgery (CAIS) systems.</p><p><strong>Study selection: </strong>A systematic search of PubMed, Scopus, and Embase identified English-language studies published between January 2015 and January 2025. The eligible studies included randomized controlled trials, observational studies, systematic reviews, in vitro investigations, and case reports. Data extraction focused on the coronal, apical, and angular deviations. Methodological quality was appraised using the Oxford Centre for Evidence-Based Medicine (CEBM) framework and validated bias assessment tools.</p><p><strong>Results: </strong>Fifty-three studies were included. Accuracy was influenced by patient-related factors (arch type, bone density, and edentulous span), surgical variables (flap design, operator experience, and guide protocol), and technological parameters (imaging modality, fiducial markers, and calibration). Static systems achieved high accuracy in dentate cases with stable guide support, but were less reliable in posterior or edentulous jaws. Dynamic navigation provided intraoperative flexibility and consistent performance across arches, although outcomes depended on calibration precision and operator learning curves. Robotic-assisted systems achieved the lowest mean deviations through trajectory control and haptic feedback, although evidence remains limited to early clinical and in vitro studies.</p><p><strong>Conclusions: </strong>Although all CAIS systems achieve high accuracy, their performance varies according to the design of the system and clinical context. Static systems are effective when stabilization is ensured, while dynamic navigation offers adaptable accuracy across scenarios, and robotics exhibit the greatest consistency by reducing operator variability. Further multicenter randomized trials and standardized reporting are needed to strengthen the available evidence and guide clinical selection.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"354-372"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145900295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Motion-DSD: AI-assisted dynamic frontal facial simulation of digital diagnostic waxing from 2-dimensional intraoral digital smile design.","authors":"Shicheng Song, Xiaoying Gou, Huihui Zhang, Yongchao Xu, Huan Liu","doi":"10.2186/jpr.JPR_D_25_00041","DOIUrl":"10.2186/jpr.JPR_D_25_00041","url":null,"abstract":"<p><strong>Purpose: </strong>This study proposes the development of \"Motion-DSD\", an artificial intelligence-assisted workflow for digital smile design (DSD), which enables a dynamic 2-dimensional (2D) simulation of digital diagnostic waxing by transferring an intraoral design onto a frontal facial video, and validates its clinical feasibility.</p><p><strong>Methods: </strong>A total of 2,000 facial and 190 intraoral images were used to fine-tune the pre-trained neural network, Segment Anything model (SAM), via two sets of low-rank adaptation (LoRA) modules for facial structures and teeth segmentation respectively. A transformation algorithm incorporating a \"standard\" facial image was developed to align intraoral and facial structures. A Flask-based web user interface (web-UI) was developed for clinical deployment. A participant sample set was prepared to validate the workflow's performance in a clinical setting.</p><p><strong>Results: </strong>Two fine-tuned SAMs achieved robust segmentation performance, with a mean Dice score coefficient of 0.886 for the facial dataset and 0.969 for the intraoral dataset. The alignment algorithm effectively transferred the intraoral DSD design onto the participant's frontal facial video and enabled a 2D simulation of digital diagnostic waxing under various facial expressions, demonstrating its clinical feasibility. The web-UI allows dentists to interactively refine the design and preview simulation results in real time.</p><p><strong>Conclusions: </strong>Motion-DSD enables the 2D simulation of digital diagnostic waxing from intraoral DSD designs in a dynamic facial context. The workflow overcomes the limitations of static imaging methods and manual alignment, bringing dynamics prior to the physical mockup phase. Further investigations are warranted to quantitatively validate the simulation accuracy and demonstrate its potential advantages over conventional static methods.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"404-413"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing the bonding strength of PEEK through chemical modification with UV/ozone treatment.","authors":"Mina Takita, Kosuke Nozaki, Shiho Otake, Shinya Oishi, Taisuke Ozaki, Wataru Komada, Kenji Fueki","doi":"10.2186/jpr.JPR_D_25_00062","DOIUrl":"10.2186/jpr.JPR_D_25_00062","url":null,"abstract":"<p><strong>Purpose: </strong>Polyetheretherketone (PEEK), a high-performance thermoplastic polymer, has been explored as a dental material because of its excellent mechanical strength and biocompatibility. Composite resin has been reported as a viable prosthetic material when appropriate surface treatment is applied to PEEK. We evaluated the effects of ultraviolet and ozone (UV/ozone) irradiation on the bond strength of PEEK.</p><p><strong>Methods: </strong>Eighty-six rectangular PEEK specimens were fabricated and divided into two surface-pretreatment groups: untreated (CO) and UV/ozone-treated (UV). The contact angle, surface roughness, and chemical composition were analyzed using contact angle goniometry, laser scanning microscopy, and X-ray photoelectron spectroscopy (XPS), respectively. The remaining specimens were assigned to two conditioning groups: no conditioning (NT) and primer conditioning (AD). Cylindrical specimens fabricated by Computer-Aided Design, Computer-Aided Manufacturing (CAD-CAM) composite resin blocks were bonded to the PEEK surface using resin cement. Half of the specimens in each group were subjected to 5000 thermal cycles. The shear bond strength was tested using a universal testing machine and the fracture surfaces were examined under a stereomicroscope. Statistical analyses were performed using t-tests (α = 0.05).</p><p><strong>Results: </strong>UV/ozone treatment significantly reduced the contact angle, improved the surface wettability, and caused slight changes in the surface roughness. XPS analysis revealed a decrease in the C=O bonds and an increase in the C-OH bonds in the UV/ozone-treated group. The shear bond strength improved significantly, particularly in the AD group.</p><p><strong>Conclusions: </strong>UV/ozone treatment of PEEK surfaces increased the wettability and significantly improved the shear bond strength of the composite resin blocks.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"487-494"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peri-implant soft-tissue responses to tooth-colored abutment materials: A systematic review.","authors":"Watcharaphol Tiskratok, Phoonsuk Limraksasin, Maythwe Kyawsoewin, Punyada Intapibool, Paiboon Jitprasertwong, Praphawi Nattasit, Masahiro Yamada, Hiroshi Egusa","doi":"10.2186/jpr.JPR_D_25_00125","DOIUrl":"10.2186/jpr.JPR_D_25_00125","url":null,"abstract":"<p><strong>Purpose: </strong>This systematic review aimed to investigate and compare peri-implant soft-tissue responses to tooth-colored abutment materials frequently used in implant dentistry.</p><p><strong>Study selection: </strong>A comprehensive electronic search was performed in three databases (MEDLINE via PubMed, Google Scholar, and Scopus) to identify relevant literature. The study-selection criteria included original research articles written in English that investigated the effects of various tooth-colored abutment materials on peri-implant soft-tissue responses.</p><p><strong>Results: </strong>In total, 136 articles were included in this systematic review. Tooth-colored abutment materials, particularly zirconia and polyetheretherketone (PEEK), facilitated favorable soft-tissue adaptation, enhanced esthetics, and contributed to long-term implant success. Zirconia demonstrated excellent biocompatibility, enhanced cell viability and attachment, and lower inflammatory responses compared to titanium, suggesting improved soft-tissue integration and reduced biofilm-related risks. PEEK exhibited favorable mechanical properties and biocompatibility but limited cell attachment due to its hydrophobicity, indicating the need for surface modification. Titanium remains the clinical standard for integration but is associated with greater inflammation and biofilm formation than tooth-colored materials.</p><p><strong>Conclusions: </strong>This review highlights the effects of tooth-colored abutment materials on peri-implant soft-tissue responses and emphasizes the importance of selecting appropriate materials for successful dental implants. Zirconia represents a promising biological alternative to titanium, promoting a stable soft-tissue barrier that contributes to minimizing inflammation and maintaining long-term tissue health. Conversely, while PEEK offers strong mechanical properties, it faces challenges regarding cell proliferation and matrix production, limiting its optimal biological performance. Further research will provide deeper insights into the best options for enhancing patient and esthetic outcomes.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"337-353"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fracture toughness evaluation of zirconia ceramics using nonlinear dynamic finite element analysis.","authors":"Okkar Kyaw, Satoshi Yamaguchi, Manabu Kanazawa, Jan De Munck, Pong Pongprueksa, Jef Vleugels, Bart Van Meerbeek, Fei Zhang, Masanao Inokoshi","doi":"10.2186/jpr.JPR_D_25_00242","DOIUrl":"10.2186/jpr.JPR_D_25_00242","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this study was to establish chevron-notched beam (CNB) finite element analysis (FEA) models to investigate the fracture toughness of zirconia ceramics.</p><p><strong>Methods: </strong>Experimental four-point flexural strength data (n = 9; previously published) for 3 mol% yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP; 3M Oral Care, Seefeld, Germany) were combined with numerical data (calculated using the inverse finite element method) to evaluate the input material properties of the CNB-FEA models. These models (n = 8) were then simulated and validated against the CNB test data of specimens with the same geometries (n = 8). The validation criteria included the margin of error, coefficient of determination, and linear regression. FEA was used to evaluate the volumetric strain distribution during deformation.</p><p><strong>Results: </strong>3Y-TZP has static elastic modulus and fracture strain values of 144.5 GPa and 0.0056, respectively. The fracture toughness of the CNB-FEA models closely matched those of the corresponding test specimens (±3% error). Linear regression yielded a coefficient of determination (R²) of 0.94 (P < 0.05), demonstrating an excellent predictive performance. The CNB-FEA models accurately reflected the actual fracture behaviors of the zirconia ceramics, with the volumetric strain localized at the notch tip.</p><p><strong>Conclusions: </strong>The volumetric strains of the CNB-FEA models could be determined using the FEA and measured four-point flexural strength data. Thus, CNB-FEA was found to be a valuable method for predicting the fracture toughness of zirconia ceramics.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"508-516"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145900263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of resilient denture liners on the maximum compressive force applied to test foods.","authors":"Atsushi Araki, Yuki Uchiyama, Daisuke Yamaguchi, Hiroshi Usami, Hisato Hotta, Suguru Kimoto","doi":"10.2186/jpr.JPR_D_25_00109","DOIUrl":"10.2186/jpr.JPR_D_25_00109","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to determine whether the maximum compressive force exerted on denture base materials by test foods varies depending on the presence and type of resilient denture liners.</p><p><strong>Methods: </strong>The maximum compressive forces of gummy jelly and peanuts were measured using a texture analyzer equipped with a 500 N load cell, operating at a crosshead speed of 9.78 mm/s. Tests were conducted on rectangular prism-shaped specimens (30 mm × 30 mm × 4 mm) fabricated from various denture base materials. Three commercial silicone-based resilient denture liners-Sofreliner Supersoft (SS), Sofreliner Mediumsoft (MS), and Sofreliner Tough Medium (TM)-and a conventional heat-cured acrylic resin (Urban, UR) were used. Additionally, the Shore A hardness of each material was measured using a hardness tester.</p><p><strong>Results: </strong>The maximum compressive forces applied to gummy jelly and peanuts on UR specimens were significantly higher than those on TM, MS, and SS specimens. Similarly, the Shore A hardness of UR was higher than that of the other materials. A statistically significant positive correlation was observed between the maximum compressive force of the test foods and the Shore A hardness of the denture base materials.</p><p><strong>Conclusions: </strong>The maximum compressive force applied to food varied according to the type of denture base materials. In particular, resilient denture liners effectively reduced the force transmitted to the food compared with conventional hard acrylic resin.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"495-500"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145899433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Habitual attentional mastication boosts prefrontal activity during chewing: A randomized trial.","authors":"Yukina Miyazaki, Yumie Ono, Tatsuya Suzuki, Yoko Hasegawa, Shogo Yoshimura, Ma Therese Sta Maria, Kazuhiro Hori, Kensuke Yamamura, Takahiro Ono","doi":"10.2186/jpr.JPR_D_25_00084","DOIUrl":"10.2186/jpr.JPR_D_25_00084","url":null,"abstract":"<p><strong>Purpose: </strong>Masticatory exercise promotes systemic health and cognitive function. Although acute masticatory stimuli enhance prefrontal cortical activity, the effects of increased habitual chewing on cortical activity remain unclear. This study evaluated the effects of habitual chewing on cortical activity in young adults.</p><p><strong>Methods: </strong>Forty-one young adults (aged 21-31 years) were randomly assigned to an intervention group, which used a wearable device to increase attentional chewing strokes during meals for 1 month, or a control group that did not use the device. We monitored the cortical activity during gum chewing using functional near-infrared spectroscopy at baseline and immediately after intervention. We recorded the number of chews per rice ball at baseline, immediately after intervention, and at 3 months post-intervention. Changes across different time points in each group were compared using one-sample t-tests with Bonferroni correction.</p><p><strong>Results: </strong>The intervention group showed a significant increase in the number of chews after the intervention and at the 3-month follow-up, whereas the control group exhibited no changes. Moreover, the intervention group demonstrated significantly higher activity in the dorsolateral prefrontal cortex (DLPFC) and premotor cortex compared with the control group. A voxel-based correlation analysis revealed a positive correlation between increase in chewing strokes and activity in these brain regions in the intervention group (family-wise error-corrected, P < 0.05).</p><p><strong>Conclusions: </strong>Intentional chewing, enhanced through an attentional intervention, led to increased activation in the DLPFC and premotor cortex during mastication. These results demonstrated the objective neural effects of interventions targeting habitual masticatory behavior.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"517-524"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145900266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Associations between the extent of maxillary defects and oral functions in patients with maxillectomy and definitive obturators.","authors":"Takayuki Kosaka, Emiri Ishii, Momoyo Kida, Shuri Fushida, Satoko Takeuchi, Risa Hiramatsu, Kotaro Higashi, Kazunori Ikebe","doi":"10.2186/jpr.JPR_D_25_00167","DOIUrl":"10.2186/jpr.JPR_D_25_00167","url":null,"abstract":"<p><strong>Purpose: </strong>We aimed to verify the hypothesis that patients who undergo prosthetic treatment with a definitive obturator following maxillectomy for oral tumors show decreased oral functions when the maxillary defects are extensive.</p><p><strong>Methods: </strong>This study comprised 77 patients (46 men, 31 women; mean age, 71.0 years) who underwent prosthetic treatment with definitive obturators designed to restore maxillary defects following maxillectomy owing to an oral tumor. Oral function, masticatory performance, maximum bite force, tongue pressure, and tongue-lip motor function (oral diadochokinesis /pa/, /ta/, /ka/) were evaluated. The extent of maxillary defects was evaluated based on Aramany's classification. The maxillary defects were classified into three groups, namely, no oroantral communication (NOC), small oroantral communication (SOC), and large oroantral communication (LOC) groups. Multiple regression analyses were performed with each oral function as the objective variable and age, sex, maximal mouth opening, history of radiotherapy, number of functional teeth, and the extent of the maxillary defect as explanatory variables.</p><p><strong>Results: </strong>The number of functional teeth and LOC were significant as explanatory variables for masticatory performance, while sex, number of functional teeth, and LOC were significant as explanatory variables for maximum bite force. Regarding other oral functions, the extent of the jaw defect was not significant as an explanatory variable.</p><p><strong>Conclusions: </strong>In patients with maxillary defects wearing definitive obturators, a defect exceeding half of the palate and communicating with the nasal cavity was significantly associated with lower masticatory performance and maximum bite force.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"501-507"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effects of simulated gastric acid on the mechanical, optical, and physicochemical properties of different esthetic CAD-CAM materials.","authors":"Ece Ucar Basol, Ilgin Dogan, Ferhan Egilmez, Lippo Lassila, Isil Cekic-Nagas","doi":"10.2186/jpr.JPR_D_25_00215","DOIUrl":"10.2186/jpr.JPR_D_25_00215","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the effects of coffee and orange juice on 3 different esthetic ceramic materials regarding color changes, Vickers microhardness, and solubility & sorption changes among patients with reflux.</p><p><strong>Methods: </strong>A glass-ceramic material (IPS Emax CAD), a polymer-infiltrated ceramic material (Vita Enamic), and a nano-hybrid ceramic material (Cerasmart) were selected for this study (n=32/group). Following the polishing procedure, all the samples were immersed in artificial saliva for 21 days. Half the samples were assigned to the control group and exposed only to artificial saliva (pH 7.3). The remaining 16 samples were exposed to saliva or simulated gastric acid. Sixteen samples from each group were exposed to gastric acid 3 times daily for 30 seconds. The color, Vickers microhardness, and solubility & sorption were then measured. Following this procedure, the samples were exposed to coffee and orange juice (n=8/per group). The samples were exposed to the solutions for 16 hours and 48 minutes to simulate 21 days of consumption. Final measurements were then obtained. Statistical significance was determined using Levene's test to compare variances, and three-way analysis of variance (ANOVA) followed by Tukey's post-hoc test, Welch's ANOVA, and Games-Howell's test were applied to reveal differences between groups.</p><p><strong>Results: </strong>According to ANOVA, restorative material type and immersion media had a significant effect on color change (P < 0.001), microhardness (P < 0.001), and solubility & sorption (P < 0.001).</p><p><strong>Conclusions: </strong>The choice of material is crucial for erosion-prone patients.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"441-449"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145917868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wear behavior of materials for fixed dental prostheses.","authors":"Kantaro Kojima, Takuya Kihara, Tomoko Ikawa, Yuko Shigeta, Takumi Ogawa","doi":"10.2186/jpr.JPR_D_25_00037","DOIUrl":"10.2186/jpr.JPR_D_25_00037","url":null,"abstract":"<p><strong>Purpose: </strong>This study evaluated the wear behavior of dental materials for definitive fixed prostheses, including computer-aided design (CAD)- and manufacturing (CAM) composite resins, polyether-ether-ketone (PEEK), Ag-Pd-Au alloys, titanium, and zirconia, under standardized experimental conditions.</p><p><strong>Methods: </strong>Three CAD-CAM-produced composite resins (HC, HCH, and CS), PEEK (SPE), Ag-Pd-Au alloys (CW), pure titanium class II (TJ), and zirconia (ZL) were tested. Two-body wear tests were conducted using an abrasion-testing machine under wet conditions using stainless-steel styluses as antagonists. Wear traces were examined using laser confocal scanning microscopy and scanning electron microscopy (SEM). Wear depths and heights were analyzed by one-way analysis of variance with Tukey's multiple comparison test.</p><p><strong>Results: </strong>The wear depths of CS and TJ were significantly greater than those of the other materials (P < 0.05), whereas ZL exhibited the lowest wear depth. No significant differences were found among HC, HCH, SPE, and CW. The stylus opposing the SPE exhibited the smallest wear height, whereas TJ caused the most antagonist wear. SEM revealed distinct wear mechanisms, including adhesive and abrasive wear, depending on the material.</p><p><strong>Conclusions: </strong>The SPE and CW showed similar wear behavior. CAD/CAM composite resins demonstrated variable wear rates, which was likely attributable to variations in the composition and morphology of the constituent fillers. The TJ exhibited excessive antagonist wear, suggesting the need for improved tribological properties. These findings provide guidance for selecting materials that preserve occlusion and prevent excessive wear.</p>","PeriodicalId":16887,"journal":{"name":"Journal of prosthodontic research","volume":" ","pages":"424-432"},"PeriodicalIF":3.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145900515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}