中华口腔医学杂志最新文献

{"title":"[Effects of diverse influencing factors in clinical dental photography on depth-of-field sharpness and distortion: a comparative study].","authors":"W Zhao, X H Wang, W Li, R N Chen, X G Zhuo, J Chen","doi":"10.3760/cma.j.cn112144-20250119-00026","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20250119-00026","url":null,"abstract":"<p><p><b>Objective:</b> To evaluate the effects of different combinations of digital single-lens reflex cameras and macro lenses, aperture settings, and focusing points on depth-of-field sharpness and image distortion in dental clinical photography, and to provide evidence-based guidance for standardizing dental clinical photography. <b>Methods:</b> Full-frame and advanced photo system type-C APS-C digital single-lens reflex cameras were paired with 105 mm and 60 mm macro lenses. Photography was performed under eight preset aperture values (F16, F18, F20, F22, F25, F29, F32, and F36) on a standard oral model, focusing separately on three points simulating the central incisor, canine, and first molar. Five attending physicians, who had completed standardized training in dental esthetic clinical photography and calibration training (with over 5 years of dental clinical photography experience), evaluated the depth-of-field sharpness of the photographs using a double-blind method. Image distortion was assessed by measuring the width-to-length ratio of the central incisor. <b>Results:</b> Photographs taken with the APS-C digital single-lens reflex camera combined with the 105 mm macro lens showed significantly higher depth-of-field sharpness scores (2.756±0.357) compared to other camera-lens combinations (<i>P</i><0.05). Photographs taken at aperture settings of F25, F29, F32, and F36 demonstrated significantly higher depth-of-field sharpness scores than those taken at F16, F18, F20, and F22 (<i>P</i><0.05). Images focused on the simulated canine achieved the highest depth-of-field sharpness scores, followed by the central incisor, with the first molar showing the lowest scores (<i>P</i><0.05). Main effect and interaction effect tests revealed that camera-lens combinations significantly affected image distortion (<i>F</i>=2.79, <i>P</i>=0.042), while focusing points and aperture settings showed no significant effect on image distortion (<i>F</i>=0.40, <i>P</i>=0.671; <i>F</i>=1.27, <i>P</i>=0.270). <b>Conclusion:</b> Based on experimental data analysis, using an APS-C digital single-lens reflex camera with a 105 mm macro lens, setting the aperture value between F25 and F36, and focusing on the canine can ensure sufficient depth-of-field sharpness while avoiding image distortion, thereby achieving optimal results in dental clinical photography.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"381-387"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731553","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":"[Clinical efficacy evaluation of liquid phase concentrated growth factors combined with stabilization splint in treating temporomandibular joint osteoarthritis].","authors":"Y Y Wu, Q N Zhao, L Zhang, H L Yu, L Zhang","doi":"10.3760/cma.j.cn112144-20241211-00472","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20241211-00472","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;b&gt;Objective:&lt;/b&gt; To evaluate the clinical efficacy of liquid phase concentrated growth factors (LPCGF) combined with a stabilization splint in treating temporomandibular joint osteoarthritis (TMJOA) compared to a stabilization splint alone. &lt;b&gt;Methods:&lt;/b&gt; A retrospective analysis of 60 TMJOA patients from December 2020 to June 2022 at Department of Maxillofacial Surgery, Yinchuan Stomatology Hospital was conducted. Patients were divided into experimental group (LPCGF+stabilization splint) and control group (stabilization splint only). The experimental group received an initial LPCGF injection, followed by biweekly injections for two sessions. Clinical assessments, including visual analogue scale (VAS) scores, maximum mouth opening (MMO), and Friction index, were conducted at baseline and at 3, 6, and 12 months post-treatment. &lt;b&gt;Results:&lt;/b&gt; At 3 months post-treatment, the VAS scores of both the control group and the experimental group [6.00 (5.00, 7.00), 6.00 (5.00, 7.00)] were significantly lower than those before treatment [2.00 (2.00, 3.00), 2.00 (2.00, 3.00)] (all &lt;i&gt;P&lt;/i&gt;&lt;0.001), and there was no statistically significant difference between the groups (&lt;i&gt;P&lt;/i&gt;&gt;0.05). The MMO [36.00 (34.75, 39.00), 37.50 (35.00, 40.00) mm] were significantly larger than those before treatment [(29.32±4.83), (27.63±6.43) mm] (all &lt;i&gt;P&lt;/i&gt;&lt;0.001), and there was no statistically significant difference between the groups (&lt;i&gt;P&lt;/i&gt;&gt;0.05). The craniiomandibular index (CMI), dysfunction index (DI), and palpation (PI) of both groups were significantly lower than those before treatment (all &lt;i&gt;P&lt;&lt;/i&gt;0.001), and there were no statistically significant differences between the groups (&lt;i&gt;P&lt;/i&gt;&gt;0.05). At 6 months post-treatment, the VAS scores of both the control group and the experimental group were significantly higher than those before treatment (all &lt;i&gt;P&lt;/i&gt;&lt;0.001), the MMO were significantly larger than those before treatment (&lt;i&gt;P&lt;/i&gt;&lt;0.001), and the Fricton index was significantly lower than that before treatment (&lt;i&gt;P&lt;/i&gt;&lt;0.05). Among them, the VAS score, DI, and CMI of the experimental group were significantly lower than those of the control group (all &lt;i&gt;P&lt;/i&gt;&lt;0.05), and there was no statistically significant difference in MMO and PI between the two groups (&lt;i&gt;P&lt;/i&gt;&gt;0.05). At 12 months post-treatment, the VAS score of the experimental group was significantly lower than that before treatment (&lt;i&gt;P&lt;/i&gt;&lt;0.001), while there was no statistically significant difference between the control group and before treatment (&lt;i&gt;P&lt;/i&gt;&gt;0.05). The VAS score of the experimental group was significantly lower than that of the control group (&lt;i&gt;P&lt;/i&gt;&lt;0.001). The MMO of both the control group and the experimental group were significantly larger than those before treatment (&lt;i&gt;P&lt;/i&gt;&lt;0.001), and the DI and CMI were significantly lower than those before treatment (all &lt;i&gt;P&lt;/i&gt;&lt;0.001). There were no statistically significant differences between the two groups (&lt;i&gt;P&lt;/i&gt;&gt;0.05). Th","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"388-393"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732049","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":"[Margin strategies for fixed restorations in esthetic zone based on the restoration-tooth- periodontium interface relationship].","authors":"S X Lin, W C Liu","doi":"10.3760/cma.j.cn112144-20250118-00025","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20250118-00025","url":null,"abstract":"<p><p>Establishing a harmonious relationship between the fixed restoration-tooth-periodontium (RTP) at the interface is crucial for achieving successful and long-lasting outcomes in esthetic zone restorations. This paper focuses on this core issue by elucidating the ideal RTP interface relationship, detailing a biological-esthetic dual-axis diagnostic classification for esthetic zone restorations based on RTP interface situation, and discussing clinical decision-making and treatment plans guided by this classification. Furthermore, specific strategies for managing the restoration margins in the esthetic zone are explored, emphasizing approaches that minimize adverse impact and enhance periodontal soft tissue protection on RTP interface in different diagnostic categories.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"332-339"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731844","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":"[Application of dental implant robot technology in postgraduate dental implant education].","authors":"X Y Wang, Z Q Qi, X Q Su, Z X Sun, X H Li, G W Wang, Q C Xu, X J Wang","doi":"10.3760/cma.j.cn112144-20241204-00457","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20241204-00457","url":null,"abstract":"<p><p><b>Objective:</b> To explore the effectiveness of robotic implant technology in the postgraduate education of implant dentistry. <b>Methods:</b> The teaching method that combines of theory and model manipulation was used to teach 20 postgraduate students. After completing the theoretical course of implant dentistry, all students performed free hand, digital template, and dental implant robot implant surgery on the simulation jaw models. At the end of the course, an error analysis of the three and a feedback questionnaire distributed to the students were conducted in order to assess the effectiveness of the dental implant robot. <b>Results:</b> Compared to the freehand [2.45(1.1) mm,2.80(0.88) mm,4.95°(2.68°)] and digital template group [1.25(0.68) mm,2.00(0.90) mm, 3.35°(1.60°)], the dental robot implant group had smaller values for implant platform deviation, apical deviation and angular deviation [0.29(0.08) mm,0.26(0.20) mm,0.72°(0.13°)], and the difference was statistically significant (<i>P</i><0.001). The results of the questionnaire showed that dental implant robot helps to ensure the accuracy and safety of the implanting process and stimulates students' interest in learning. <b>Conclusions:</b> At postgraduate level, the safety and accuracy of the implantation process was effectively improved and good teaching result achieved by introducing dental implant robot into the process of dental implant training.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"403-408"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732045","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":"[Clinical case retrospective study on fragment reattachment of anterior teeth with sub-gingival & supra-alveolar ridge crown-root fractures in esthetic zone].","authors":"M Meng, J Zhao, Y T Zhang, H H Yu, L Chen, F Zhang, M Fang, W Zhou","doi":"10.3760/cma.j.cn112144-20250114-00014","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20250114-00014","url":null,"abstract":"<p><p><b>Objective:</b> To evaluate the clinical process of fragment reattachment in crown-root fractures (CRF) of teeth that the fracture occurred between sub-gingival and supra-alveolar ridge (sub-gingival & supra-alveolar ridge) in the esthetic zone, and to analyze the feasibility of this minimally invasive technique for sub-gingival & supra-alveolar ridge CRF involving anterior teeth. <b>Methods:</b> Fourteen sub-gingival & supra-alveolar ridge CRF involving anterior teeth in 12 patients received fragment reattachment in the Department of Prosthodontics, School of Stomatology, the Fourth Military Medical University from January 2016 to August 2024. The success rate of the fractured teeth 3 years after reattachment and the complications during the follow-up period were retrospectively analyzed. The 3-year success rate and complications during follow-up were evaluated to assess the clinical efficacy of this technique. <b>Results:</b> The 14 treated teeth were followed for an average of (36.0±33.7) months (range: 4-99 months). Complications occurred in 2 teeth: one was extracted due to debonding and replaced with a removable partial denture, while the other developed a palatal sinus post-reattachment, which healed after local saline irrigation and medication (followed for 12 months without recurrence). The remaining 12 teeth exhibited no complications, resulting in a success rate of 13/14. <b>Conclusions:</b> Fragment reattachment is a minimally invasive, rapid, and cost-effective treatment option for sub-gingival & supra-alveolar ridge CRF in the anterior esthetic zone. With strict case selection, it delivers favorable outcomes and extends the clinical lifespan of affected teeth.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"347-354"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732046","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":"[Esthetic restoration of maxillary central incisor crown fracture with composite resin direct bonding assisted by digital technology].","authors":"H Y Zhang, Y T Chen, B X Hou","doi":"10.3760/cma.j.cn112144-20250121-00028","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20250121-00028","url":null,"abstract":"","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"413-416"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731807","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":"[Analysis and prospects of the \"Global strategy and action plan on oral health (2023-2030)\"].","authors":"F Liu, S Q Yu, X L Han","doi":"10.3760/cma.j.cn112144-20240909-00340","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20240909-00340","url":null,"abstract":"<p><p>Oral diseases have become a major global public health issue. The \"Global strategy and action plan on oral health (2023-2030)\" issued by the World Health Organization in 2023 marks a milestone in advancing global oral health and serves as a pivotal initiative for implementing global oral health resolutions and strategies. Centered on universal health coverage, the action plan outlines multiple strategies and concrete actions, including strengthening prevention, early intervention, and integrated management, for improving the oral health worldwide. This paper provides a comprehensive review of the strategies and measures outlined in the action plan, aiming to offer valuable insights for developing an oral health pathway in China that aligns with national circumstances and the broader trajectory of human societal development.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"320-325"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143732040","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":"[A study of the effect of midface fullness on the overall perception of lip prominence].","authors":"L X Chen, X H Yang, Z H Chen, S H Chen, J W Cai, L Y Xu","doi":"10.3760/cma.j.cn112144-20250118-00024","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20250118-00024","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;b&gt;Objective:&lt;/b&gt; To evaluate the influence of midface (nasal base and zygomatic bone) morphological changes on the overall perception of lip prominence from different perspectives. &lt;b&gt;Methods:&lt;/b&gt; From February to March 2024, 212 volunteers were recruited in Fujian Province as study subjects and divided into three groups: orthodontists [65 participants, 28 males and 37 females, aged (31.3±6.9) years], orthodontic patients [72 participants, 24 males and 48 females, aged (27.6±5.7) years], and healthy adults [75 participants, 37 males and 38 females, aged (25.6±4.4) years]. Three-dimensional facial modeling software was used to generate facial models, which were sculpted using three-dimensional model sculpting software to simulate different nasal base, zygomatic bone, and upper lip prominence conditions. A total of 15 facial models were generated, divided into five groups (three models per group): Group A (normal nasolabial angle, normal nasal base, normal upper lip); Group B (increased nasolabial angle, normal nasal base, flattened upper lip); Group C (decreased nasolabial angle, normal nasal base, protruded upper lip); Group D (increased nasolabial angle, protruded nasal base, normal upper lip); Group E (decreased nasolabial angle, recessed nasal base, normal upper lip). Models 1, 2, and 3 in each group had normal, protruded, and flattened zygomatic bones, respectively (with Model 1 in Group A as the initial model). Forty-five-degree and ninety-degree profile images of the models were captured (30 images in total) and compiled into a questionnaire. Participants in the three study groups were selected as the most attractive and least attractive facial appearances based on the questionnaire and ratings of the lip prominence of the 45° and 90° profile images (0-10 points, where 0=very flat, 5=normal, and 10=very prominent). A one-sample t-test was used to compare the difference between model ratings and the median score of 5. &lt;b&gt;Results:&lt;/b&gt; Among the 30 images, the proportion of lip prominence ratings deviating from the median score of 5 was the highest among orthodontists [83% (25/30)], followed by orthodontic patients [67% (20/30)], and lowest among healthy adults [53% (16/30)]. At the 90° profile view, the scores given by orthodontists, orthodontic patients, and healthy adults for the initial model (5.07±0.79, 5.00±1.03, and 4.95±1.07, respectively) showed no statistically significant difference from 5 (&lt;i&gt;t=&lt;/i&gt;0.65, &lt;i&gt;P=&lt;/i&gt;0.521; &lt;i&gt;t=&lt;/i&gt;0.00, &lt;i&gt;P=&lt;/i&gt;1.000; &lt;i&gt;t=&lt;/i&gt;-0.42, &lt;i&gt;P=&lt;/i&gt;0.673). At the 45° profile view, the scores given by orthodontists, orthodontic patients, and healthy adults for the initial model (5.42±0.98, 5.40±1.15, and 5.35±1.45, respectively) were significantly higher than 5 (&lt;i&gt;t=&lt;/i&gt;3.30, &lt;i&gt;P=&lt;/i&gt;0.002; &lt;i&gt;t=&lt;/i&gt;2.98, &lt;i&gt;P=&lt;/i&gt;0.004; &lt;i&gt;t=&lt;/i&gt;2.11, &lt;i&gt;P=&lt;/i&gt;0.038). At both 90° and 45° profile views, orthodontists, orthodontic patients, and healthy adults all rated the lip prominence of Model 1 in Group E (nasa","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"365-374"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731986","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":"[Expert consensus: reducing free-sugar for caries prevention].","authors":"X J Zeng, X N Liu, M Liu, Y Si, Y Zhang, J Q Lai, X B Ding, C Su, X Si, Y G Lu, H C Lin, S G Zheng, W S Rong, M Q Du, X Y Ou, R M Qiu, M G Zhou, C X Wang","doi":"10.3760/cma.j.cn112144-20241203-00451","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20241203-00451","url":null,"abstract":"<p><p>In modern society, sugary foods have become an integral part of many people's lives. However, excessive sugar consumption has adverse effects on both overall health and oral health, serving as a contributing factor to the global increasing incidence in oral diseases, cardiovascular diseases, cancers, obesity, and diabetes. In response to the health risks related to high-sugar diets, the World Health Organization (WHO) and World Dental Federation (FDI) have proposed initiatives and recommendations, with various governments implementing different policies and strategies to reduce sugar intake. Chinese government has also taken proactive measures. The \"Healthy China Action (2019-2030)\" initiative introduced by the State Council in 2019 established a crucial benchmark in limiting the average daily intake of added sugar to 25 g per person forward to 2030. Experts from Chinese Center for Disease Control and Prevention and the field of oral health have meticulously examined the impacts of sugar reduction on oral health, as well as strategies, methods, and practical considerations related to reducing sugar intake through several meeting and wrote the \"Expert consensus: reducing free-sugar for caries prevention\", which was subsequently reviewed and revised based on the feedback from multiple stakeholders. They have conducted thorough analyses of global trends in sugar reduction and best practices to provide valuable insights to China for crafting effective policies and strategies on sugar reduction. This consensus mainly includes the classification of free sugars, the latest scientific evidence on dental caries, recommendations from WHO on sugar-sweetened beverage taxes, nutrition labeling, advertising, food reform, adjusting supply systems, education, and promotion strategies, as well as sugar reduction actions taken by various governments around the world. Combining the actual situation in China, policy recommendations and authoritative popular science knowledge on sugar reduction for caries prevention to public are proposed to advocate for experts in multiple fields to focus on sugar reduction for caries prevention, promote the work process, and provide the scientific basis for oral health educators.</p>","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"311-319"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731826","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":"[Establishment and characterization of an artificial caries-affected dentin model with demineralization and discoloration].","authors":"S J Liang, X Y Li, C M Yao, C Huang","doi":"10.3760/cma.j.cn112144-20241226-00505","DOIUrl":"https://doi.org/10.3760/cma.j.cn112144-20241226-00505","url":null,"abstract":"&lt;p&gt;&lt;p&gt;&lt;b&gt;Objective:&lt;/b&gt; To investigate the establishment, structural, and bonding interface characteristics of an artificial caries-affected dentin model with demineralization and discoloration as a basis of research on caries-affected dentin bonding repair. &lt;b&gt;Methods:&lt;/b&gt; One hundred intact molars without caries were collected (acquired from Department of Oral and Maxillofacial Surgery, School & Hospital of Stomatology, Wuhan University from March to May 2023) and prepared as 5 mm thick dentin specimens. Then, they were screened and divided into 3 parts. One part of dentin specimens was subjected to bacterial biofilms to prepare artificial carious dentin (ACD). They were further ground by 600-grit SiC paper for 0, 12, 24, 36, and 48 s, respectively to obtain 5 groups with different layers of ACD: ACD-0, 12, 24, 36, and 48 s. Sound dentin was used as the control group. To determine the preparation parameter for artificial caries-affected dentin (ACAD), the first part of specimens was used for bacterial visualization observation (&lt;i&gt;n&lt;/i&gt;=3) and demineralization analysis experiments (micro-CT, Raman spectroscopy, and surface micro-hardness analyses, &lt;i&gt;n&lt;/i&gt;=3). Another part of dentin specimens was allocated to 3 groups: control group (sound dentin), artificial caries-infected dentin group (ACD-0 s) and ACAD group (prepared according to the parameter determined by the experiments above). They were used for color tests (&lt;i&gt;n&lt;/i&gt;=10), Raman spectroscopy analysis (&lt;i&gt;n&lt;/i&gt;=6) and scanning electron microscope (SEM) observation (&lt;i&gt;n&lt;/i&gt;=1), thus comparing color, chemical composition and structure, and micro-morphology of 3 groups. The rest of dentin specimens were divided into 2 groups: sound dentin and ACAD (&lt;i&gt;n&lt;/i&gt;=6), which were bonded to composite resin with Single Bond Universal in a self-etch mode. Then, the bonding interface was measured using an electron probe micro-analyzer (EPMA). &lt;b&gt;Results:&lt;/b&gt; The depth of bacterial invasion for ACD-0 s was (142.4±25.8) μm. And obvious bacteria were observed in the dentin tubules for the ACD-12 s group. For micro-CT, the demineralization depth was (283.9±25.6) μm for ACD-0 s and (139.2±27.9) μm for ACD-36 s. The grey values in some regions of the dentin surface for ACD-48 s resembled those of sound dentin. For Raman spectroscopy, the peak ratio of phosphate to amide Ⅰ was significantly lower for ACD-24 s [4.2 (3.2,6.7)] than ACD-36 s [6.7 (6.0,7.7)] (&lt;i&gt;P&lt;/i&gt;&lt;0.05). Additionally, there was no significant difference in surface micro-hardness between ACD-24 s [8.3 (7.0,10.2) HV] and ACD-36 s [10.2 (9.1,11.4) HV] (&lt;i&gt;P&lt;/i&gt;&gt;0.05). The preparation parameter of ACAD was determined to be grinding for 36 s based on the experimental results above. The brightness (L&lt;sup&gt;*&lt;/sup&gt; value) and the yellow-blue chromaticity (b&lt;sup&gt;*&lt;/sup&gt; value) of ACAD (76.69±2.54, 33.15±1.89) were significantly lower than those of the control group (85.23±1.68, 35.87±1.55) (&lt;i&gt;P&lt;/i&gt;&lt;0.05). The red-green chromaticity (a&lt;sup&gt;*&lt;/sup&gt; val","PeriodicalId":23965,"journal":{"name":"中华口腔医学杂志","volume":"60 4","pages":"355-364"},"PeriodicalIF":0.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731805","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}