中华口腔医学杂志最新文献

{"title":"[Expert consensus on rational use of antimicrobial agents in the treatment of oral and maxillofacial space infection].","authors":"","doi":"10.3760/cma.j.cn112144-20250506-00168","DOIUrl":"10.3760/cma.j.cn112144-20250506-00168","url":null,"abstract":"<p><p>The use of antimicrobial agents is an important measure for the treatment of oral and maxillofacial space infection(OMSI). The irrational use of antimicrobials will not only affect the effect of disease treatment, but also leads to the occurrence of bacterial resistance. To standardize the rational use of antimicrobial agents in the treatment of OMSI, this consensus was developed based on the latest evidence-based medical research, incorporating extensive input from pharmaceutical and oral clinical experts, and refined through multiple rounds of discussion and revision. This consensus mainly reviews the anti-infective treatment regimen, common drug use methods, pharmaceutical monitoring, and treatment duration for OMSI. It aims to provide guidance for oral clinicians in the rational use of antimicrobial agents during the treatment of such infections.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"809-821"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Digital workflow for full mouth rehabilitation of natural dentition].","authors":"H Cheng","doi":"10.3760/cma.j.cn112144-20250408-00125","DOIUrl":"10.3760/cma.j.cn112144-20250408-00125","url":null,"abstract":"<p><p>With the continuous advancement of dental medicine and the increasing prevalence of digital technology, occlusal reconstruction has entered a new era characterized by high precision, efficiency, and predictability. This paper focuses on the digital workflow of full-dentition occlusal reconstruction, integrating multimodal data such as intraoral scanning, facial scanning, cone-beam CT, and mandibular movement tracking. By utilizing a domestic artificial intelligence platform, a virtual patient model for oral rehabilitation is established. The workflow encompasses five key stages: preliminary preparation, digital adjustment of jaw relations, transitional restoration verification, definitive restoration, and follow-up maintenance, ensuring the precise realization of treatment objectives. The core advantages of digital technology lie in the efficient integration of multimodal data, visualized treatment planning, and accurate clinical execution. In view of technical limitations, this paper emphasizes data quality control and related challenges. This digital pathway not only significantly enhances the efficacy of occlusal reconstruction, but also optimizes the patient experience, representing an important future direction for restorative dentistry.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"829-837"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Digital occlusal analysis: solutions and efficacy].","authors":"F Wang, L N Niu, J H Chen","doi":"10.3760/cma.j.cn112144-20250401-00113","DOIUrl":"10.3760/cma.j.cn112144-20250401-00113","url":null,"abstract":"<p><p>The integration of digital technology with dentistry has become a central driving force in 21st-century dental innovation. Within the realm of occlusal function research, analytical methodologies are undergoing a paradigm shift: evolving from traditional empirical models toward multidimensional intelligent systems capable of digital precision assessment. The critical need for accurate occlusal contact analysis in both clinical practice and scientific research underscores the strategic importance of selecting context-appropriate analysis technologies, a process fundamental to ensuring diagnostic precision and research reproducibility. This investigation systematically discussed the evolutionary trajectory of occlusal analysis technologies through three key dimensions: technical principles, metric innovation, and efficacy evaluation framework. By conducting comparative analyses of various methodologies, we focus on delineating their unique technical advantages and clinical applicability boundaries. The study ultimately aims to establish evidence-based selection protocols for precision occlusal diagnostics while charting technical roadmaps for the iterative advancement of intelligent occlusal analysis systems.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"822-828"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Advances in the application of photoacoustic imaging technology for oral disease diagnosis].","authors":"L L Cheng, Y Zhang, W Y Huang, Y D Ding, S J Zeng, J Zhang","doi":"10.3760/cma.j.cn112144-20250422-00149","DOIUrl":"10.3760/cma.j.cn112144-20250422-00149","url":null,"abstract":"<p><p>Photoacoustic imaging (PAI), an emerging hybrid imaging modality, integrates the high spatial resolution of optical imaging with the deep-tissue imaging capability of ultrasound. Emerging evidence from recent studies in dental medicine has demonstrated the unique potential of PAI in screening, diagnosis, and therapeutic monitoring of oral pathologies, including periodontal diseases, oral cancers, and pulpal disorders. However, its clinical translation remains contingent upon addressing multiple technical barriers, particularly signal attenuation induced by optical scattering in biological tissues and limitations in real-time imaging efficiency. Therefore, investigating the advancements and challenges of PAI technology in the diagnosis of oral diseases will contribute to advancing further research and clinical applications, thereby providing practical support for improving the accuracy of early diagnosis and the efficacy of treatment for oral diseases.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"935-938"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Preliminary exploration of the applications of five large language models in the field of oral auxiliary diagnosis, treatment and health consultation].","authors":"C L Han, S Z Bai, T M Zhang, C Liu, Y C Liu, X X Hu, Y M Zhao","doi":"10.3760/cma.j.cn112144-20241107-00418","DOIUrl":"10.3760/cma.j.cn112144-20241107-00418","url":null,"abstract":"<p><p><b>Objective:</b> To evaluate the accuracy of the oral healthcare information provided by different large language models (LLM) to explore their feasibility and limitations in the application of oral auxiliary, treatment and health consultation. <b>Methods:</b> This study designed eight items comprising 47 questions in total related to the diagnosis and treatment of oral diseases [to assess the performance of LLM as an artificial intelligence (AI) medical assistant], and five items comprising 35 questions in total about oral health consultations (to assess the performance of LLM as a simulated doctor). These questions were answered individually by the five LLM models (Erine Bot, HuatuoGPT, Tongyi Qianwen, iFlytek Spark, ChatGPT). Two attending physicians with more than 5 years of experience independently rated the responses using the 3C criteria (correct, clear, concise), and the consistency between the raters was assessed using the Spearman rank correlation coefficient, and the Kruskal-Wallis test and Dunn post hoc test were used to assess the statistical differences between the models. Additionally, this study used 600 questions from the 2023 dental licensing examination to evaluate the time taken to answer, scores, and accuracy of each model. <b>Results:</b> As an AI medical assistant, LLM can assist doctors in diagnosis and treatment decision-making, with an inter-evaluator Spearman coefficient of 0.505 (<i>P</i><0.01). As a simulated doctor, LLM can carry out patient popularization, with an inter-evaluator Spearman coefficient of 0.533 (<i>P</i><0.01). The 3C scores of each model as an AI medical assistant and a simulated doctor were respectively: 2.00 (1.00, 3.00) and 2.00 (2.00, 3.00) points of Erine Bot, 1.00 (1.00, 2.00) and 2.00 (1.00, 2.00) points of HuatuoGPT, 2.00 (1.00, 2.00) and 2.00 (1.00, 3.00) points of Tongyi Qianwen, 2.00 (1.00, 2.00) and 2.00 (1.75, 2.25) points of iFlytek Spark, 3.00 (2.00, 3.00) and 3.00 (2.00, 3.00) points of ChatGPT (full score of 4 points). The Kruskal-Wallis test results showed that, as an AI medical assistant or a simulated doctor, there were statistically differences in the 3C scores among the five large language models (all <i>P</i><0.001). The average score of the 5 LLMs on the dental licensing examination was 370.2, with an accuracy rate of 61.7% (370.2/600) and a time consumption of 94.6 min. Specifically, Erine Bot took 115 min, scored 363 points with an accuracy rate of 60.5% (363/600), HuatuoGPT took 224 min and scored 305 points with an accuracy rate of 50.8% (305/600), Tongyi Qianwen took 43 min, scored 438 points with an accuracy rate of 73.0% (438/600), iFlytek Spark took 32 min, scored 364 points with an accuracy rate of 60.7% (364/600), and ChatGPT took 59 min, scored 381 points with an accuracy rate of 63.5% (381/600). <b>Conclusions:</b> Based on the evaluation of LLM's dual roles as an AI medical assistant and a simulated doctor, ChatGPT performes the best, with basically correct","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"871-878"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Study on the construction of a novel dentin remineralization system based on carboxylated polyamidoamine synergistic with magnesium ions].","authors":"Q R Li, J D Long, K Q Yan, X M Huang, G F Ban, F F Xie, W X Chen","doi":"10.3760/cma.j.cn112144-20250530-00198","DOIUrl":"10.3760/cma.j.cn112144-20250530-00198","url":null,"abstract":"<p><p><b>Objective:</b> To explore the effect of carboxylated polyamidoamine (PAMAM-COOH) in combination with magnesium ions on the remineralization ability of amorphous calcium phosphate (ACP) in inducing remineralization of dentin collagen fibers in a 50% ethanol solution. <b>Methods:</b> Forty-five intact third molars extracted for impaction reasons were obtained from the College & Hospital of Stomatology, Guangxi Medical University. Two types of demineralized dentin specimens were prepared: ①Fully demineralized dentin (<i>n</i>=30), specimens were immersed in 17% ethylenediaminetetraacetic acid (EDTA) (pH=7.4) at room temperature for 14 days with daily solution refreshment; ②Partially demineralized dentin (<i>n</i>=15), specimens were treated with 37% phosphoric acid gel (Ultra-Etch, Ultradent) for 15 seconds followed by thorough rinsing with deionized water. Three remineralization groups were established for demineralized dentin treatment: ①Control group, 50% ethanol solution; ②ACMP group, 50% ethanol solution containing amorphous magnesium calcium phosphate (ACMP); ③PAMAM-COOH/ACMP group, 50% ethanol solution incorporating carboxylated polyamidoamine dendrimer-modified ACMP (PAMAM-COOH/ACMP). The chemical composition of remineralization solutions was analyzed by Fourier-transform infrared spectrum (FTIR). The morphology and particle size distribution of nanoparticles were characterized using transmission electron microscope (TEM). The fully demineralized dentin specimens were treated with three different remineralization solutions (37 ℃ for 7 days) respectively. The mineralization of the dentin collagen fibers surface was observed using scanning electron microscope (SEM) and the distribution of minerals inside and outside the collagen fibers was examined by using TEM. The partially demineralized dentin specimens were treated with fluorescence-labeled remineralization solutions (37 ℃ for 7 days) respectively, followed by analysis using confocal laser scanning microscopy (CLSM) to quantitatively evaluate the penetration depth of the mineralization agents. <b>Results:</b> FTIR analysis confirmed the presence of characteristic absorption peaks corresponding to phosphate (PO₄^3-) groups, carbon-nitrogen bonds, and amide linkages in the PAMAM-COOH/ACMP nanocomposite. TEM observed that the PAMAM-COOH/ACMP nanoparticles exhibited an average particle size of (36.85±8.02) nm in an amorphous state. SEM observation indicates continuous mineral deposition on dentin collagen fibers in the PAMAM-COOH/ACMP group, while no mineral deposition in the control group and only minimal deposition in the ACMP group. TEM showed no mineral deposition inside or outside the collagen fibers in the control group, only external mineral deposition in the ACMP group, and high-density mineral deposition both inside and outside the fibers in the PAMAM-COOH/ACMP group. CLSM analysis revealed a statistically significant difference (<i>P</i><0.05) in the dep","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"897-904"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Development and accuracy evaluation of a photogrammetry-based extraoral scanning system for edentulous implant placement].","authors":"Y T Yang, A N Wen, X Y Shang, S Y Shan, W B Li, Q Z Qin, Z X Gao, Y J Zhu, Y Wang, Y J Zhao","doi":"10.3760/cma.j.cn112144-20250406-00120","DOIUrl":"10.3760/cma.j.cn112144-20250406-00120","url":null,"abstract":"<p><p><b>Objective:</b> To evaluate the accuracy of a self-developed extraoral scanning system based on photogrammetry technology, and to provide evidence for advancing the development and clinical application evaluation of domestically produced scanning devices. <b>Methods:</b> This research group developed a photogrammetry-based implant extraoral scanning system with customized scan bodies. Two distinct edentulous implant resin models were designed and three-dimensional (3D)-printed by Center of Digital Dentistry, Peking University School and Hospital of Stomatology, containing 6 (Model 1) and 8 (Model 2) abutment analogs respectively. Reference data acquisition was performed using a high-precision denture 3D scanner with scan caps mounted on the analogs. Specialized scan bodies were then mounted on the analogs for 3D positional data acquisition using both the self-developed system (experimental group) and the clinically established system (control group). Each system conducted 10 repeated scans per model. Trueness was assessed through root mean square error (RMSE), linear deviation (LD), and angular deviation (AD) relative to reference data, while precision was determined through intra-group RMSE analysis. Systematic comparisons included inter-group performance on identical models and intra-group variability across different models. <b>Results:</b> For Model 1, the experimental group showed statistically significant advantages over controls in intra-group RMSE [(3.10±0.71) μm <i>vs</i> (4.61±1.51) μm, <i>P</i><0.001], reference-data RMSE [(21.48±0.60) μm <i>vs</i> (32.50±0.63) μm, <i>P</i><0.001], linear deviation [23.64 (32.35) μm <i>vs</i> 44.86 (55.73) μm, <i>P</i><0.001], and angular deviation [0.29° (0.29°) <i>vs</i> 0.23° (0.33°), <i>P</i><0.001]. In Model 2, significant improvements were observed in intra-group RMSE [(4.47±1.58) μm <i>vs</i> (6.21±2.07) μm, <i>P</i><0.001], reference-data RMSE [(38.84±0.86) μm <i>vs</i> (43.69±1.34) μm, <i>P</i><0.001], and linear deviation [37.95 (50.68) μm <i>vs</i> 49.71 (58.89) μm, <i>P</i><0.001]. Both groups exhibited model-dependent variability, with RMSE of precision and trueness of both groups, linear deviation of experimental group, angular deviation of control group showing statistically significant increases (all <i>P</i><0.001) corresponding to abutment analog quantity. <b>Conclusions:</b> The self-developed scanning system demonstrates superior accuracy in 3D positional acquisition of abutment analogs compared to the contral group system, with implant number identified as a critical determinant of extraoral scanning accuracy.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"863-870"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Diversity of incision and flap design in periodontal regenerative surgery: clinical practice].","authors":"Z Huang, Q X Luan","doi":"10.3760/cma.j.cn112144-20250103-00003","DOIUrl":"10.3760/cma.j.cn112144-20250103-00003","url":null,"abstract":"<p><p>This article reviews the recent advancements in incision and flap design for periodontal regenerative surgery, with a particular focus on the application of minimally invasive surgical techniques and non-crestal approaches. When applied to periodontal regeneration, traditional flap designs, such as the modified Widman flap, present disadvantages including wound dehiscence and gingival recession, compromising regenerative outcomes. To address these issues, researchers have developed a series of novel techniques, including papilla preservation techniques, minimally invasive techniques, and single-flap techniques. However, these techniques usually involve horizontal or oblique incisions near the interdental papilla adjacent to the intrabony defect, which may still lead to wound dehiscence, limiting periodontal regeneration. Also they may cause gingival recession and reduction in papilla height, resulting in \"black triangles\". In recent years, a series of new techniques utilizing non-crestal approaches have emerged, altering incision placement to preserve the interdental papilla. Examples include the entire papilla preservation technique using a lateral incision approach, non-incised papilla surgical approaching by an apical incision, and apically incised coronally advanced surgical technique. By placing incisions away from the papilla, these methods achieve complete papilla preservation and provide greater space for regeneration, effectively promoting the regeneration of both intrabony and suprabony periodontal tissues. This article systematically analyzes the key surgical points, indications, and clinical efficacies of different incision designs in periodontal regenerative surgery. Detailed case presentations illustrate the step-by-step procedures of these techniques, demonstrating their favorable outcomes in treating intrabony defects. The aim is to encourage future clinical studies to validate the effectiveness and safety of these novel techniques.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"846-856"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effect of cone beam CT registration versus intraoral scanning registration on implant accuracy in robot-assisted surgery: a study using simulated skull models].","authors":"Y X Wang, Y L Wang, S M Yu, Y Y Zhao, Y F Zhang, Q Yan","doi":"10.3760/cma.j.cn112144-20241025-00401","DOIUrl":"10.3760/cma.j.cn112144-20241025-00401","url":null,"abstract":"<p><p><b>Objective:</b> To compare the effects of using cone beam CT (CBCT) and oral scanning registration on implant positional accuracy during robot-assisted implant surgery, and to provide a basis for selecting the appropriate registration for robot-assisted implant surgical options. <b>Methods:</b> One patient with dentition defect, specifically missing teeth at positions 21 and 26 and having natural teeth adjacent mesially and distally to the edentulous area, who visited the Department of Oral Implantology, School of Hospital of Stomatology Wuhan University in 2024 were selected. Based on reconstructed imaging data, 30 identical jaw models were printed. These models were divided into a CBCT registration group and an intra-oral scanning registration group (15 models per group). An associate chief physician with extensive experience in implant surgery performed preoperative registration using the implant robot and completed the implant surgeries. Postoperative CBCT scans were used to determine the three-dimensional position of the implants. The deviations between the planned implant position and the actual position were evaluated, including deviations at the implantation point, apical point, and angular deviation. The differences between the two groups were compared. <b>Results:</b> The implantation deviation was 0.675 (0.490) mm, apical deviation was (0.680±0.272) mm, and the angular deviation was 0.566°±0.147° in the CBCT registration group, and in the intra-oral scanning registration group, implantation deviation was 0.695 (0.313) mm, apical deviation was (0.667±0.217) mm, and the angular deviation was 0.523°±0.168°. There was no statistically significant error in implant precision between the two groups (<i>P</i>>0.05). <b>Conclusions:</b> This <i>in vitro</i> experiment found that the use of intra-oral scanning registration in robot-assisted implant surgery can achieve similar implant placement accuracy as CBCT registration.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"857-862"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Preliminary investigation on the effect of zirconium-based colorants on the colorimetric properties of fused deposition modeled polyetheretherketone composites].","authors":"J Chen, Y C Chen, J Qian, W N Fu, W F Chen, X X Li","doi":"10.3760/cma.j.cn112144-20250401-00112","DOIUrl":"10.3760/cma.j.cn112144-20250401-00112","url":null,"abstract":"<p><p><b>Objective:</b> To analyze the effect of zirconium-based pigments with different mass fractions on the colorimetric properties of fused deposition modeling (FDM) polyetheretherketone (PEEK) composites, and to investigate the feasibility of using these pigments for computer color matching of PEEK composites. <b>Methods:</b> Specimens were fabricated using FDM technology, comprising two control groups [Pure PEEK group, PEEK-TiO₂ group (PEEK compounded with 20% TiO₂)] and nine experimental groups based on the type of zirconium-based pigment (zirconium praseodymium yellow, zirconium iron red, zirconium vanadium blue) and mass fraction (0.1%, 0.5%, 1.0%). The experimental group specimens consisted of PEEK blended with 20% TiO₂ and the respective zirconium-based pigment. The spectral reflectance curve and chromaticity values of all specimens were measured using a spectrophotometer. The relationship between the chromaticity values of each colored PEEK composite in the experimental groups and the pigment mass fraction was determined. Shade guide tabs mimicking clinically used tooth shades were fabricated using a light-curing resin (Filtek Z350XT Body). The full-spectrum color matching method was employed to calculate the PEEK composite formulations (PEEK, 20% TiO₂, blends of the three zirconium-based pigments) required to match these target tooth shades. Verification group specimens based on these calculated recipes were then fabricated. The color difference between each verification group specimen and its corresponding target shade tab was calculated. Color differences between the target shade tabs and the two control groups (Pure PEEK, PEEK-TiO₂) were also calculated. <b>Results:</b> The spectral reflectance curves of PEEK composite specimens containing different types of zirconium-based pigments exhibited distinct characteristic features. The chromaticity values were significantly affected by the mass fraction of the same zirconium-based pigment. Based on computer color matching calculations, the color differences between the verification group specimens and the target shade tabs ranged from 1.59 to 14.55. <b>Conclusions:</b> This study demonstrates the feasibility of utilizing the three zirconium-based pigments (zirconium praseodymium yellow, zirconium iron red, zirconium vanadium blue) for full-spectrum computer color matching of PEEK-TiO₂ composites.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 8","pages":"879-885"},"PeriodicalIF":0.0,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144745329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}