Clinical Oral Investigations最新文献

{"title":"The normal width of the lateral incisors in the maxilla in an European population.","authors":"Irene Artioli, Aline Ndayisaba, Jean-Pierre Ndayisaba, Adriano Giacomo Crismani","doi":"10.1007/s00784-025-06235-2","DOIUrl":"10.1007/s00784-025-06235-2","url":null,"abstract":"<p><strong>Objectives: </strong>Dental anomalies are clinical alterations that originate during the tooth formation process. This prospective study aims to establish the norm and hypoplasia values for maxillary lateral incisors. Additionally, it aims to describe the relationship between the width of the lateral and the central incisors, considering gender, age, and body height.</p><p><strong>Materials and methods: </strong>The first 103 consecutive patients meeting the inclusion criteria were included in the study. The upper jaw of each patient was scanned, and the scans were saved as standard tessellation language (STL) files. The upper incisors of each digital cast were measured on the computer. Two examiners performed the same measurements independently.</p><p><strong>Results: </strong>The average size of the maxillary central incisor was 8.59 ± 0.51 mm, while the average size of the maxillary lateral incisor was 6.64 ± 0.46 mm. A formula describing a relationship between the central (x) and lateral (y) incisors was defined with a linear regression analysis y = 1.88 + 0.55 * x. Width of maxillary incisors [11, 12, 21, 22] increased with height (p = 0.028, p = 0.016, p = 0.016, p = 0.046 respectively).</p><p><strong>Conclusions: </strong>Hypoplasia of the maxillary lateral incisor can be defined for teeth with a mesiodistal width less than 6.18 mm in a patient that is represented with the test group. A relationship between the maxillary lateral incisors and central incisors could have been established by means of a formula.</p><p><strong>Clinical relevance: </strong>The width of the maxillary lateral incisors allows a precise orthodontic and prosthetic planning.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"159"},"PeriodicalIF":3.1,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11860988/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143499722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of biocorrosion and titanium ions release on peri-implantitis.","authors":"Chonghao Ji, Yaqian Chen, Misi Si, Xiaoyan Chen","doi":"10.1007/s00784-025-06186-8","DOIUrl":"10.1007/s00784-025-06186-8","url":null,"abstract":"<p><strong>Objectives: </strong>Biofilm accumulation is considered the primary cause of peri-implant inflammation. Still, metallosis caused by an increased concentration of titanium ions at the site of peri-implantitis site cannot be ignored. Whether titanium ions alone or in concert with bacterial biofilm trigger inflammation and bone destruction in peri-implant tissues remains unproven.</p><p><strong>Materials and methods: </strong>Articles were retrieved from PubMed/Medline, Web of Science. All studies focusing on titanium ions release in peri-implant reactions were included and evaluated.</p><p><strong>Results: </strong>Titanium implants are considered non-inert and may release titanium ions in the intraoral microenvironment, the most important of which is the acidic environment created by bacterial biofilms. Although the correlation between titanium ion release and the incidence or progression of peri-implantitis is controversial, several studies have confirmed the potential role of titanium ions. Diffusion or entry of titanium ions into the circulation may be a scavenging effect on local titanium ions but can cause systemic adverse effects. However, existing measures are not yet able to balance reducing biocorrosion and maintaining osteogenic results, and the exploration of new materials requires long-term clinical data.</p><p><strong>Conclusions: </strong>Titanium ions have potential impacts on peri-implant tissue and systemic circulation. Titanium ions are closely associated with bacterial biofilms in the occurrence and development of periimplantitis. The preventive strategies for the release and action of titanium ions remain to be explored.</p><p><strong>Clinical relevance: </strong>Our findings may provide the hope of shedding light on the pathogenesis of peri-implantitis and its treatment.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"155"},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143491173","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":"Discriminating bacterial types in oral and maxillofacial space infections (OMSIs) via smelling diagnosis.","authors":"Rui Ren, Xue Jiang, Shanluo Zhou, Haiqiang Li, Qiang Niu, Danyao Qu, Ruizhi Ning, Zerou Zhang, Liang Kong, Weiwei Wu, Yunpeng Li","doi":"10.1007/s00784-025-06243-2","DOIUrl":"10.1007/s00784-025-06243-2","url":null,"abstract":"<p><strong>Objectives: </strong>To explore the feasibility of using gas chromatography-mass spectrometry (GC-MS) in the diagnosis of bacterial types of oral and maxillofacial space infections (OMSIs).</p><p><strong>Methods: </strong>Staphylococcus aureus was cultured to produce a full spectrum of volatile organic compounds (VOCs). These VOCs were collected and identified using VOC collectors and GC-MS. A bacteria Probability-based VOC Algorithm (BPVA) was developed to assess the likelihood of infection in vivo utilizing a rat model. VOCs from 19 clinical OMSIs abscess samples were analyzed to calculate the probability of SA infection, with results validated against traditional culture results.</p><p><strong>Results: </strong>Using fold change (FC), p-values (P), and variable importance in projection (VIP) values, we identified 318 characteristic target compounds associated with Staphylococcus aureus. After fitting these compounds to the rat infection model, 189 compounds were selected, establishing a BPVA threshold of ≥ 50, with a 95% probability of consistency. Four patients exhibited an SA infection probability exceeding 70%, whereas the other patients fell below this threshold. Clinical results confirmed SA infections in these four patients, with detection times reduced to approximately 24 h, significantly shorter than the typical 3-5 days.</p><p><strong>Conclusions: </strong>The combination of GC‒MS and BPVA significantly accelerated the diagnosis of bacterial types in OMSIs, demonstrating strong agreement with traditional culture results, highlighting a new method to accurately and rapidly diagnose maxillofacial infections.</p><p><strong>Clinical relevance: </strong>Rapid identification of bacterial types is essential for treating OMSIs. However, current bacterial culture methods face challenges, such as limited accuracy and time-consuming processes.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"157"},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143491201","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":"In-vitro validation of a new method to assess the clinical accuracy of complete arch impressions.","authors":"Moritz Waldecker, Schessler Katherina, Bömicke Wolfgang, Rammelsberg Peter, Rues Stefan","doi":"10.1007/s00784-025-06236-1","DOIUrl":"10.1007/s00784-025-06236-1","url":null,"abstract":"<p><strong>Objectives: </strong>To develop and validate a new method to acquire reference distances.</p><p><strong>Materials and methods: </strong>A method to accurately register the intraoral position of precision balls was developed to generate reference values for the in-vivo assessment of impression accuracy and tested in vitro. Therefore, metal occlusal veneers with a special abutment carrying precision balls were provisionally attached to specific positions on the patient's dental arch (anatomical model with PMMA covered metal teeth). To register the precision ball positions, form-congruent counterparts were jointed to the abutments, adhesively fixed to a transfer aid, removed and digitized with a laboratory scanner. First, the distance determination using a transfer aid and a laboratory scanner was validated. Second, the process was tested for an anatomic situation.</p><p><strong>Results: </strong>When measuring distances using a transfer aid and a laboratory scanner, distances could be detected with an accuracy of less than 5 μm. Using the new test setup on the anatomical model, the intraoral scanners more accurately reproduced scan volumes up to one quadrant, with deviations between the actual scan data sets/plaster models and the reference data set of < 52 μm for Primescan, < 82 μm for Omnicam, and < 125 μm for conventional impression. Longer distances tended to be more accurately represented by the conventional impression (Primescan < 304 μm; Omnicam < 328 μm; conventional impression < 164 μm).</p><p><strong>Conclusions: </strong>The developed method seems suitable for determining the clinical accuracy of conventional and digital complete arch impressions.</p><p><strong>Clinical relevance: </strong>For determining the clinical accuracy of conventional or digital impressions, reference values are crucial.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"156"},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11861410/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143491202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the overall fit of three-unit posterior fixed dental prostheses fabricated with laser sintering and conventional casting methods.","authors":"Gürel Pekkan, Kubra Degirmenci, Süleyman Hakan Tuna, Canan Hekimoğlu, Serkan Saridag","doi":"10.1007/s00784-025-06221-8","DOIUrl":"10.1007/s00784-025-06221-8","url":null,"abstract":"<p><strong>Objectives: </strong>The aim of this study was to investigate the marginal, internal, and occlusal discrepancies of three-unit posterior cobalt-chromium (Co-Cr) fixed dental prostheses (FDPs) produced using five different fabrication techniques.</p><p><strong>Materials and methods: </strong>Segmental maxillary models were prepared from polyamide material using a laser sintering method. The maxillary first premolar and first molar teeth were prepared to receive posterior FDPs. Direct metal laser sintering (DMLS) and selective laser melting (SLM) were used as two metal laser Co-Cr framework production systems. FDP specimen patterns were prepared by manual wax carving (Cast), 3D-printed polymer (3DP), and CAD/CAM wax and cast using the lost-wax technique as conventional methods. In total, 100 Co-Cr metal framework specimens were prepared for posterior FDPs (n = 20). The silicone replica technique was used to measure marginal, internal, and occlusal discrepancies of all frameworks. A stereomicroscope was employed to detect discrepancies at 100× magnification. The data were analyzed using two-way ANOVA (α = 0.05) and post hoc Bonferroni adjustment (α = 0.005) for pairwise comparisons.</p><p><strong>Results: </strong>There were no significant differences between the occlusal discrepancy values of premolar abutments of FDPs when compared with different fabrication methods (P > 0.05). The highest marginal discrepancy value was detected as 116.22 μm for molar abutment when the Cast method was used (P < 0.05). The highest occlusal discrepancy values were detected as 135.60 μm and 141.49 μm for molar abutments of posterior FDPs when the 3DP and Cast methods were used. The lowest marginal discrepancy value was detected as 38.94 μm for molar abutments when the DMLS method was used (P < 0.05).</p><p><strong>Conclusions: </strong>The DMLS method was more successful than other fabrication methods when fit values of abutment teeth for posterior frameworks were compared.</p><p><strong>Clinical relevance: </strong>The morphology of the abutment teeth and the fabrication techniques of FDPs migth affect the discrepancy values of FDPs planned. It was seen that the discrepancy values were lowest with the DMLS and SLM methods. Considering the results of this in-vitro study, DMLS and SLM techniques may be more appropriate option than the 3DP method, which starts with digital design and ends conventionally casting technique for posterior three-unit FDPs.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"153"},"PeriodicalIF":3.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11847754/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143482273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polishing of 4Y- and 5Y- zirconia: effects on roughness, color and gloss.","authors":"Laura Koch, Sebastian Hahnel, Angelika Rauch, Martin Rosentritt","doi":"10.1007/s00784-025-06244-1","DOIUrl":"10.1007/s00784-025-06244-1","url":null,"abstract":"<p><strong>Objectives: </strong>To investigate the effects of polishing systems on the roughness, gloss and color of two zirconia materials as a function of the rotational speed and number of polishing movements.</p><p><strong>Materials and methods: </strong>Specimens (n = 8/group) from 4Y-TZP and 5Y-TZP were milled, diamond grinded and polished. The intraoral polishing varied in the number of polishing steps, the grain size and the matrix. Different number of polishing movements and rotation speed were used. Roughness (ISO25178-2:2021), gloss (ISO2813:2014) and color stability (ISO/CIE 11664-4:2019) were determined.</p><p><strong>Statistics: </strong>Shapiro-Wilk, one-way analysis, Bonferroni, Pearson, variance analysis/intermediate sub-effects (α = 0.05).</p><p><strong>Results: </strong>Roughness Sa varied between 2.45 ± 0.93 µm and 6.47 ± 0.26 µm (4Y-TZP) and 2.31 ± 0.19 µm and 6.54 ± 0.22 µm (5Y-TZP). Maximum roughness Sz ranged from 32.92 ± 12.59 µm to 99.32 ± 19.87 µm (4Y-TZP) and 31.45 ± 3.02 µm to 90.75 ± 12.59 µm (5Y-TZP). Different gloss from 28.9 ± 4. 23 to 102.39 ± 18.63 GU (4Y-TZP) and 33.19 ± 3.68 to 101.28 ± 10.00 GU (5Y-TZP) was found. ΔE results ranged from 0.39 ± 0.34 to 6.30 ± 1.22 (4Y-TZP) and 0.87 ± 0.71 to 7.50 ± 1.67 (5Y-TZP). Significant (p ≥ 0.095) intermediate sub-effects were found.</p><p><strong>Conclusions: </strong>Polishing led to a reduction in roughness, an increase in gloss and a significant change in color. Polishing had a stronger effect on 5Y-TZP.</p><p><strong>Clinical relevance: </strong>The correct use of the polisher type (stages, binder) and its specific application (rotational speed, movements) can improve roughness, gloss and color variations.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"154"},"PeriodicalIF":3.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11850485/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143482280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CBCT image based radiomic analysis for condylar resorption after orthognathic surgery.","authors":"Ruo-Han Ma, Ji-Ling Feng, Jia-Yang Chen, Yu-Xuan Yang, Ju-Peng Li, Gang Li","doi":"10.1007/s00784-025-06227-2","DOIUrl":"10.1007/s00784-025-06227-2","url":null,"abstract":"<p><strong>Objectives: </strong>To select and discover features which are highly correlated with condylar resorption (CR) after orthognathic surgery (OS) by a new method.</p><p><strong>Materials and methods: </strong>The cone beam computed tomography (CBCT) images were collected from orthognathic patients taken at T1(baseline time point) and T2(within 3-36 months postoperatively). The subjects were divided into the CR group and the control group by using a 2-level scale after registering T1 and T2 images. The condyles were segmented by MVEL-Net network model and were analyzed by Pyradiomics. The D-value equaled to the absolute difference-value (D-value) between the feature values of T1 and T2. The correlation between features with statistically significant differences in T1 and D-values would be analyzed to find the specific features related to CR after OS.</p><p><strong>Results: </strong>A total of 145 subjects were included (27 males and 118 females), which had 44 subjects in the CR group, 101 subjects in the control group. For all samples, a total of 82 features were extracted (F₁), which were with statistical differences at T1 time point between CR and control groups. By using the D-value, the number of features was reduced to 32 features (F_d). Among F_d, only 3 were not included in F₁.</p><p><strong>Conclusions: </strong>The D-value was proposed for selecting specific features of CR after OS and it can be observed that the D-value serves the purpose of feature specification compared to T1 values. By using the D-values, several features were found to change significantly during the process of CR after OS.</p><p><strong>Clinical relevance: </strong>The features selected by D-value can be used for the establishment of a prediction model for CR after OS.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"152"},"PeriodicalIF":3.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143476343","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":"A retrospective, cross-sectional analysis of the dental status and needs of patients taking vascular endothelial growth factor (VEGF) antagonists.","authors":"Alexander Raucci, Katherine France","doi":"10.1007/s00784-025-06230-7","DOIUrl":"10.1007/s00784-025-06230-7","url":null,"abstract":"<p><strong>Objectives: </strong>There is growing literature related to the dental effects of biologic agents. However, little research has evaluated the dental needs of these patients and limited data is available on patients taking vascular endothelial growth factor (VEGF) antagonists.</p><p><strong>Materials and methods: </strong>This retrospective cross-sectional study analyzed patients taking VEGF antagonists and their respective dental treatments from 2017 to 2023. Patient demographics, decayed, missing, and filled tooth (DMFT) status, and treatment details were recorded and evaluated descriptively. DMFT from this population was compared to patients taking other biologic agents using t-tests.</p><p><strong>Results: </strong>Twenty-three patients taking VEGF antagonists received dental treatment. Periodontal treatments were the most common (n = 18, 78%), followed by restorative treatments (n = 17, 74%). DMFT data for patients taking VEGF antagonists were not significantly different than values for patients taking other biologic agents, except for patients taking TNF-α Inhibitors, who had significantly fewer missing teeth than patients taking VEGF antagonists (3.88 vs. 8.10, p = 0.01).</p><p><strong>Conclusions: </strong>The necessity of dental treatment in patients taking VEGF Antagonists is still unknown. Periodontal and restorative treatments were the most common modalities with no complications observed from treatment. While preventive periodontal treatment is routinely recommended, high usage of targeted periodontal and restorative treatments is seen in this population.</p><p><strong>Clinical relevance: </strong>Minimal evidence exists to date on the delivery of and need for routine dental treatment among patients taking VEGF antagonists. This paper presents a first estimate of dental needs in this population.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"151"},"PeriodicalIF":3.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11845543/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143472410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unique clinical features and prognostic risk factors of oral squamous cell carcinoma in patients under 30 years old.","authors":"Hao-Yang Cheng, Yu-Xuan Wu, Zi-Li Yu","doi":"10.1007/s00784-025-06213-8","DOIUrl":"10.1007/s00784-025-06213-8","url":null,"abstract":"<p><strong>Background: </strong>Individuals under 30 years old with oral squamous cell carcinoma (OSCC) are a relatively rare subgroup but require attention. However, literature on the clinicopathological characteristics of OSCC patients under 30 is currently lacking.</p><p><strong>Methods: </strong>A total of 66 OSCC patients under 30 were included in this study. We collected data on demographic characteristics, chief complaint, risk factors, pathological features, imaging, blood test, staging, neoadjuvant therapy, surgical treatment plans, and survival status. Survival curves for overall survival (OS) and disease-free survival (DFS) were generated to explore prognostic factors in patients under 30.</p><p><strong>Results: </strong>Among the 66 patients, tongue cancer was predominant, accounting for 60/66 (90.9%). Female patients had no history of smoking, alcohol consumption, or betel nut chewing, whereas all male patients with a history of betel nut chewing were smokers. Patients who sought medical attention shortly after the onset of symptoms tended to demonstrate greater disease severity. The 5-year OS for these patients was 88.9%, and the 5-year DFS was 77.2%. Smoking, drinking, betel nut chewing, staging, LNM, and tumor histological differentiation were not associated with OS and DFS, whereas high neutrophil count and high monocyte count were associated with better survival outcomes.</p><p><strong>Conclusion: </strong>Our study dataset shows that OSCC patients under 30 are a subgroup with a high prevalence of tongue cancer, distinct etiological factors in females, and increasing proportions of betel nut chewing and moderately/poorly differentiated tumors. This subgroup generally has a favorable prognosis, but the prognostic factors differ from those in the general OSCC population.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"150"},"PeriodicalIF":3.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143472414","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 resistance of endocrowns made from different CAD/CAM materials after prolonged fatigue aging.","authors":"Arslandaş Dinçtürk B, Sufyan Garoushi, Kedici Alp C, Vallittu Pk, Üçtaşlı Mb, L Lassila","doi":"10.1007/s00784-025-06241-4","DOIUrl":"10.1007/s00784-025-06241-4","url":null,"abstract":"<p><strong>Objectives: </strong>The aim of this study was to evaluate the fracture resistance of endocrowns made of experimental short fiber-reinforced CAD/CAM block (SFRC CAD) in comparison with different commercial CAD/CAM materials.</p><p><strong>Materials and methods: </strong>In this study, 60 sound mandibular molar teeth with similar occlusal sizes (± 1 mm) were used. Standard preparations simulating an endocrown cavity were prepared and the teeth were divided into four groups randomly. After the digital photoimpression of the prepared cavities using a dental intraoral scanner (CEREC), the restorations were designed (4 mm high) and milled using IPS e.max, Cerasmart 270, Katana Avencia and SFRC CAD blocks (n = 15/per group). Restorations were cemented with self-adhesive dual-cure resin cement (G-Cem One). The specimens were immersed in a 37 °C water bath within the chewing simulator. Following cyclic fatigue aging for 1.000.000 cycles (F_max=150 N), a quasi-static load was applied using a universal testing machine at a speed of 1 mm/min. Fractography analysis was conducted using optical microscopy.</p><p><strong>Results: </strong>According to the data obtained, there are statistically significant differences in fracture resistance values between different CAD/CAM materials (p < 0.05). The highest values were observed in the experimental SFRC CAD group (3025 N), while the lowest values were observed in the IPS e.max group (2295 N).</p><p><strong>Conclusions: </strong>The type of CAD/CAM restorative material influences the fracture resistance of endocrowns. SFRC CAD blocks could potentially serve as an alternative material for endocrown restorations in the future.</p><p><strong>Clinical relevance: </strong>Endocrowns fabricated from SFRC CAD blocks have demonstrated promising fracture behavior, suggesting their suitability for clinical testing.</p>","PeriodicalId":10461,"journal":{"name":"Clinical Oral Investigations","volume":"29 3","pages":"149"},"PeriodicalIF":3.1,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11845440/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143472412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}