Dento maxillo facial radiology最新文献

{"title":"Automating virtual dental implant planning: can artificial intelligence match clinical expertise?","authors":"Bahaaeldeen M Elgarba, Eslam Abdelwahab Dawood, Rocharles Cavalcante Fontenele, Pierre Lahoud, Jan Meeus, Reinhilde Jacobs","doi":"10.1093/dmfr/twag015","DOIUrl":"10.1093/dmfr/twag015","url":null,"abstract":"<p><strong>Objectives: </strong>This study evaluated a validated artificial intelligence (AI) tool for virtual implant planning by comparing its performance with expert-planned and clinically placed implants in single-tooth rehabilitation cases.</p><p><strong>Methods: </strong>Pre- and postoperative cone-beam CT (CBCT) scans were retrospectively collected from 32 single-tooth implant cases. Actual implants were placed by expert clinicians using a human intelligence (HI)-based approach guided by the preoperative CBCT. The same scans were used to generate both AI- and HI-based virtual implant plans. Pre- and postoperative scans were registered to allow accurate comparison between placed and planned implants. Three plans were evaluated per case: clinically placed implant (HI-place), HI-planned implant (HI-plan), and AI-planned implant (AI). Evaluations included angular deviation relative to adjacent teeth and prosthetic wax-ups, vertical and horizontal bone thickness, proximity to vital structures, implant dimensions, planning time, and planning repeatability.</p><p><strong>Results: </strong>The Friedman test indicated no significant differences in implant location among the 3 approaches (P > .05). Angular deviations were similar across methods for both the neighboring tooth (HI-place = 7.01 ± 4.7°; HI-plan = 7.30 ± 5.6°; AI = 6.86 ± 3.7°) and the wax-up (HI-place = 5.22 ± 3.0°; HI-plan = 4.55 ± 3.0°; AI = 5.50 ± 4.9°). Implant diameter and length selections also did not differ significantly across HI-place (4.06 ± 0.4 mm; 10.61 ± 1.4 mm), HI-plan (4.06 ± 0.4 mm; 10.45 ± 1.4 mm), and AI (4.05 ± 0.5 mm; 10.39 ± 1.4 mm). AI was significantly faster (P < .05), requiring 150 s vs 429 s for HI-plan, and showed excellent repeatability with zero deviation between repeated plans.</p><p><strong>Conclusions: </strong>AI-driven virtual implant planning achieved clinically acceptable placement comparable to expert clinicians in single-implant rehabilitation, with superior efficiency and repeatability, supporting its use in routine presurgical workflows.</p><p><strong>Advances in knowledge: </strong>Integrating AI for implant location and dimensions selection, with accuracy comparable to expert clinicians, can streamline the digital implant workflow, reduce planning time, and allow clinicians to focus on verifying the AI-generated plan prior to clinical transfer, thereby increasing the time available for the actual treatment procedure.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":"421-430"},"PeriodicalIF":4.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13317984/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147347630","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":"Stage 0 medication-related osteonecrosis of the jaws: a systematic review on the controversial role of imaging techniques.","authors":"Chiara Casarini, Andrea Magnini, Maria Pisano, Nicholas Landini, Antonio Lo Casto, Cosimo Nardi","doi":"10.1093/dmfr/twag027","DOIUrl":"10.1093/dmfr/twag027","url":null,"abstract":"<p><strong>Objective: </strong>Medication-related osteonecrosis of the jaws (MRONJ) is a progressive and debilitating condition that lacks specific clinical symptoms in its early phase. The recognition of stage 0 MRONJ, defined by clinical signs without bone exposure, may improve prognosis and reduce the risk of disease progression. The aim of this systematic review was to evaluate the early imaging features of MRONJ using panoramic radiography (PAN), cone beam CT (CBCT), multislice CT (MSCT), and MRI.</p><p><strong>Methods: </strong>A literature review was conducted in accordance with PRISMA guidelines using PubMed, Embase, Web of Science, and Scopus databases. Original studies in English language published by October 1, 2025, and focusing on imaging techniques in early-stage MRONJ were selected.</p><p><strong>Results: </strong>Osteosclerosis was found in 50.0%, 75.0%, and 87.5% of the studies with PAN, CBCT, and MSCT respectively. Osteolysis was identified in 66.7% of the studies with PAN and 25.0% of the studies with both CBCT and MSCT. Additional features observed less frequently were lamina dura thickening, bone sequestration, nonspecific bone alterations, and lack of post-extraction bone healing. On MRI, the non-exposed affected bone showed low T1 signal intensity, high T2 STIR signal intensity, and an increased apparent diffusion coefficient compared with healthy subjects.</p><p><strong>Conclusions: </strong>Osteosclerosis was the most frequently observed sign, although no imaging technique proved specific features for stage 0 MRONJ. Further studies with larger cohorts together with a standardization of imaging findings and a revaluation of the definition of MRONJ will be needed to identify such disease in its early stages.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":"409-420"},"PeriodicalIF":4.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147962682","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":"Assessment of vertical magnification ratios in digital panoramic radiography using phantoms: evaluation of DICOM metadata and calibration consistency.","authors":"Han-Gyeol Yeom, Hyun-Gab Kim, Yeon-Tae Kim, Kyung-Hoe Huh, Won-Jin Yi, Min-Suk Heo, Sam-Sun Lee, Jo-Eun Kim","doi":"10.1093/dmfr/twaf074","DOIUrl":"10.1093/dmfr/twaf074","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to investigate the vertical magnification ratios of various digital panoramic radiography devices and assess their consistency. It also xamined the relationship between magnification ratios and Digital Imaging and Communications in Medicine (DICOM) header information to determine the potential use of key metadata in inferring or standardizing magnification corrections.</p><p><strong>Methods: </strong>A ball phantom with metal spheres and an implant phantom were used to assess vertical magnification ratios. Eleven panoramic radiography systems were tested, and three DICOM tags-pixel spacing, imager pixel spacing, and aspect ratio-were analyzed. Three specialists measured phantom lengths in randomized DICOM images using PACS software, repeating measurements after 4 weeks. Magnification ratios were calculated by averaging 24 measurements per sample and comparing them to actual lengths.</p><p><strong>Results: </strong>Intra- and interobserver reliability were high (ICC > 0.99). Most devices showed magnification ratios of 0.95-1.08, whereas those of devices 3 and 9 ranged from 1.21 to 1.30. Although some magnification ratios, which were used for system-based calibration, could be indirectly inferred by dividing the imager pixel spacing value by the pixel spacing value when both values were precisely recorded, no DICOM headers explicitly provided magnification ratios.</p><p><strong>Conclusions: </strong>This study demonstrated that many digital panoramic radiography devices apply software-based corrections to achieve a vertical magnification ratio close to 1.0; however, inconsistencies remain across different systems. Measurement accuracy and clinical reliability can be enhanced by standardization of magnification correction methods and improved documentation in product specifications and DICOM headers, which is clinically relevant for increasing the accuracy of vertical measurements in procedures such as dental implant planning and thereby enhancing treatment predictability and patient safety.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":"431-438"},"PeriodicalIF":4.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145231828","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":"Cranial Base Characteristics in Adults with Obstructive Sleep Apnoea and Matched Controls: A Retrospective CBCT Study.","authors":"Aida Kurbanova, Seçil Aksoy, Ulaş Öz, Finn Rasmussen, Kaan Orhan","doi":"10.1093/dmfr/twag043","DOIUrl":"https://doi.org/10.1093/dmfr/twag043","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to investigate cranial base and clival morphology using cone-beam computed tomography (CBCT) in patients with obstructive sleep apnoea (OSA) and matched controls, with particular emphasis on angular measurements and anatomical variations of the clivus and surrounding structures.</p><p><strong>Methods: </strong>CBCT scans of 73 OSA patients and 73 age- and sex-matched controls were retrospectively evaluated. The skull base angle (SBA) and clivus angle (CA) were measured, and anatomical variants, including sphenoid sinus pneumatization types, sella turcica morphology, fossa navicularis magna (FNM), canalis basilaris medianus (CBM), and craniopharyngeal canal (CPC), were assessed. Group comparisons and regression analyses were performed to identify associations between these parameters and apnoea-hypopnea index (AHI).</p><p><strong>Results: </strong>Compared with controls, patients with OSA exhibited a significantly smaller SBA and a significantly larger CA (both p < 0.001). The distribution of sphenoid sinus pneumatization patterns differed significantly between the groups (p = 0.018). Presellar sphenoid sinus pneumatization was more frequent in the OSA group. Post-sellar pneumatization was the predominant pattern in both groups and was more frequent in controls. No significant differences were observed in sella turcica morphology, CBM, or FNM between groups. The CPC was not detected in any participant.</p><p><strong>Conclusion: </strong>CBCT-based evaluation demonstrated that adults with OSA had a smaller cranial base angle, a larger clivus angle, and more frequent sphenoid sinus pneumatization anterior to the sella turcica compared with matched controls. Although these findings should be interpreted within a multifactorial framework, their assessment may provide complementary anatomical information in the radiologic evaluation of OSA.</p><p><strong>Advances in knowledge: </strong>This study presents a CBCT-based assessment of cranial base characteristics in adults with OSA, identifying angular features and anatomical variants that may be associated with upper airway narrowing. These findings suggest a potential role for cranial base configuration in OSA risk assessment, particularly in patients without overt maxillofacial abnormalities.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148293696","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":"Quantification of Supracrestal Tissue Attachment Using High-Frequency Ultrasound.","authors":"Suhel Khan, Pie Yun Tsai, Brett Weatherington, Jesse V Jokerst","doi":"10.1093/dmfr/twag045","DOIUrl":"10.1093/dmfr/twag045","url":null,"abstract":"<p><strong>Objectives: </strong>To develop and validate a noninvasive ultrasound (US)-based framework for quantifying supracrestal tissue attachment (STA) and evaluating tooth-type variation in STA dimensions, to assess the accuracy of conventional periodontal probing against photographic ground truth (GT), and US images.</p><p><strong>Methods: </strong>A high-frequency, miniaturized side-facing US transducer was used to simultaneously image gingival soft tissue, alveolar bone, and periodontal probes. Ex vivo swine jaws were imaged to compare US-derived probing depth and STA measurements with ground-truth photographic measurements and conventional manual probing. Measurement bias and agreement were evaluated using statistical analyses. Observed anatomical trends were further examined using full-mouth human cadaver imaging and validated in vivo in human subjects. Power analysis was performed to determine sensitivity for detecting biologically relevant differences between tooth types.</p><p><strong>Results: </strong>US-derived probing depth measurements showed lower bias (0.23 ± 0.42 mm) relative to GT than manual probing (0.54 ± 0.25 mm) and enabled direct visualization of STA with a periodontal probe. Agreement analyses showed improved accuracy of US measurements compared with conventional probing. Systematic differences in STA were identified between molar (1.86 ± 0.88 mm) and premolar (2.59 ± 0.53 mm) teeth in ex vivo specimens. These trends were confirmed in full-mouth cadaver imaging and in vivo human validation. Power analysis indicated 80% statistical power to detect clinically meaningful differences in STA dimensions across tooth types.</p><p><strong>Conclusions: </strong>STA is not uniform across the dentition and varies depending on the tooth type. High-frequency US provides a robust, noninvasive modality for direct anatomical measurement and may improve the quantitative assessment of periodontal structures in clinical practice.</p><p><strong>Advances in knowledge: </strong>This study challenges the long-standing assumption of uniform STA and introduces a validated US-based method for direct anatomical measurement. The findings highlight clinically relevant tooth-type variation and support the integration of high-frequency US into periodontal diagnostics and treatment planning.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13371951/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148276519","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":"Radiological-pathological correlation of tumour size and depth of invasion of oral squamous cell carcinoma using Dual-Energy CT in comparison to MRI and the impact on T-stage.","authors":"Veronique C M L Timmer, Genevieve A J C Crombag, Sander M J van Kuijk, Mari F C M van den Hout, Peter A W H Kessler, Alida A Postma","doi":"10.1093/dmfr/twag044","DOIUrl":"https://doi.org/10.1093/dmfr/twag044","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to evaluate Dual-energy CT (DECT) reconstructions for tumour size determination including depth of invasion of primary oral squamous cell carcinoma (OSCC) compared to MRI.</p><p><strong>Methods: </strong>Retrospectively forty-six consecutive patients with primary OSCC who underwent contrast-enhanced DECT and MRI were included. Tumour size, including maximum diameter (MD), tumour thickness (TT), and depth of invasion (DOI), was assessed using DECT weighted average (WA) images, virtual monoenergetic imaging at 40 keV (VMI), iodine overlay maps (IOM), and MRI, and compared to pathology as the reference standard.</p><p><strong>Results: </strong>DECT DOI showed stronger correlations with pathological DOI (pDOI) than TT or MD (.85 to .88 for DOI compared to .69 to .78 for TT and MD, p<.001 for all). ICC between DECT DOI and pDOI was highest for DECT VMI (.79). MRI measurements resulted in the highest overestimation of TT, MD and DOI. Bland-Altman plots showed acceptable mean differences. T-stage based on rDOI instead of tumour size increased agreement for all imaging. A DECT and MRI cut-off score of 5 mm could accurately discriminate pDOI >5mm achieving a sensitivity of 100%.</p><p><strong>Conclusion: </strong>While DECT DOI showed stronger correlations and agreement with pDOI than MRI, both DECT and MRI showed high discriminative ability for pDOI > 5 mm.</p><p><strong>Advances in knowledge: </strong>This study provides new insights into the capability of DECT for radiologically assessing the depth of invasion in OSCC offering a reliable alternative to MRI and potentially improving preoperative tumour diagnosis.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":""},"PeriodicalIF":4.0,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148270572","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":"Impact of labelling inaccuracy and image noise on tooth segmentation in panoramic radiographs using federated, centralized, and local learning.","authors":"Johan Andreas Balle Rubak, Khuram Naveed, Sanyam Jain, Lukas Esterle, Alexandros Iosifidis, Ruben Pauwels","doi":"10.1093/dmfr/twag001","DOIUrl":"10.1093/dmfr/twag001","url":null,"abstract":"<p><strong>Objectives: </strong>Federated learning (FL) may mitigate privacy constraints, heterogeneous data quality, and inconsistent labelling in dental artificial intelligence (AI). FL was compared with centralized (CL) and local learning (LL) for tooth segmentation in panoramic radiographs across multiple data corruption scenarios.</p><p><strong>Methods: </strong>An Attention U-Net was trained on 2066 radiographs from 6 institutions across 4 settings: baseline (unaltered data), label manipulation (dilated/missing annotations), image-quality manipulation (additive Gaussian noise), and exclusion of one faulty client with corrupted data. FL was implemented via the Flower AI framework. Per-client training and validation loss trajectories were monitored for anomaly detection and a set of metrics (Dice, IoU, HD, HD95, and ASSD) were evaluated on a hold-out test set. From these metrics significance results were reported through Wilcoxon signed-rank test. CL and LL served as comparators.</p><p><strong>Results: </strong>Baseline: FL achieved a median Dice of 0.949 (ASSD: 1.332), slightly better than CL at 0.947 (ASSD: 1.371) and LL at 0.936-0.940 (ASSD: 1.519-1.698). Label manipulation: FL maintained the best median Dice score at 0.949 (ASSD: 1.465) versus CL's 0.942 (ASSD: 1.757) and LL's 0.930-0.940 (ASSD: 1.519-2.115). Similar performance was observed when 2 faulty clients were introduced. Image noise: FL led with a Dice at 0.949 (ASSD: 1.311); CL had a Dice of 0.948 (ASSD: 1.361); LL ranged from 0.932 to 0.940 (ASSD: 1.519-1.774). Similar performance was observed when 2 faulty clients were introduced, with CL performing slightly better than FL. Faulty client exclusion: FL showed a Dice of 0.948 (ASSD: 1.331) better than CL's 0.946 (ASSD: 1.393). Loss curve monitoring reliably flagged the corrupted site.</p><p><strong>Conclusions: </strong>FL matches or exceeds CL and outperforms LL across corruption scenarios while preserving privacy. Per-client loss trajectories provide an effective anomaly-detection mechanism and support FL as a practical, privacy-preserving approach for scalable clinical AI development.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":"336-353"},"PeriodicalIF":4.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145988718","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":"When to perform cone beam computed tomography (CBCT) in primary root canal treatment? A CBCT-based cross-sectional study on the prevalence of MB2 canal in maxillary first molars.","authors":"Bledar Lilaj, Elias Salzmann, Gernot Paul Hönigl, Rinet Dauti, Anton Dobsak, Sophie Pock, Barbara Cvikl","doi":"10.1093/dmfr/twag008","DOIUrl":"10.1093/dmfr/twag008","url":null,"abstract":"<p><strong>Objectives: </strong>CBCT provides insights into the presence of an additional root canal in maxillary first molars. Since the maxillary first molar is one of the teeth most likely requiring root canal treatment, and young people are more sensitive to radiation exposure, this study aimed to evaluate the prevalence of MB2 canals in healthy, untreated maxillary first molars using CBCT.</p><p><strong>Methods: </strong>CBCT scans of maxillary first molars of 167 patients were categorized according to the classification systems of Wein, Vertucci, and Ahmed. The number of root canals and the presence of an MB2 canal were analyzed descriptively. The associations between the presence of an MB2 canal and various factors, including gender, position in the dental arch, and age group, were examined using a chi-squared test at a significance level of P < .05. All analyses were performed using SPSS.</p><p><strong>Results: </strong>A second mesiobuccal root canal was found in 63% (Weine) and 66% (Vertucci) of the examined maxillary first molars, respectively. Significantly fewer women exhibited a second mesiobuccal root canal compared to men. No statistical differences were observed regarding the position in the dental arch or the different age groups. The most frequently observed root canal morphologies were Vertucci Type I and IV (34% each), followed by Type II (23%), Type VI (6%), Type V (2%), and Type III (1%). In the Weine classification, Types I and II (35% each) were most common, followed by Type III (29%) and Type IV (1%). In the Ahmed classification, the most common configuration was 3MB2-2DB1P1.</p><p><strong>Conclusions: </strong>A MB2 canal was present in about two-thirds of maxillary first molars, with significantly lower prevalence in women but no association with tooth position or age.</p><p><strong>Advances in knowledge: </strong>This study provides updated prevalence and morphological data on MB2 canals, showing they occur in about two-thirds of maxillary first molars and differ by gender. These findings may guide future diagnostic approaches and support more targeted use of CBCT in endodontic treatment planning.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":"55 4","pages":"381-391"},"PeriodicalIF":4.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147812349","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":"Cleaning of photostimulable phosphor plates with chlorhexidine-based substances does not affect image quality of radiographs.","authors":"Carolina Paes Borge, Iago Filipe Correia-Dantas, Débora Costa Ruiz, Thamiles Gonzalez-Passos, Deborah Queiroz Freitas, Amanda Farias-Gomes","doi":"10.1093/dmfr/twag004","DOIUrl":"10.1093/dmfr/twag004","url":null,"abstract":"<p><strong>Objectives: </strong>To evaluate image quality of radiographs obtained with photostimulable phosphor (PSP) plates after cleaning with 2% chlorhexidine.</p><p><strong>Methods: </strong>Eight PSP plates were used: 4 from Express system and 4 from VistaScan system. Two plates from each system were wiped with 2% chlorhexidine in aqueous solution (CHX AQ), and the other 2 plates from each system with 2% chlorhexidine in alcoholic solution (CHX AL). Before cleaning and after every 5 cleaning cycles (up to 100 cleanings), 2 radiographs of an acrylic block and 2 of an aluminium step wedge were acquired with each PSP plate. The image's gray values were measured to assess image brightness, noise, uniformity, and contrast. Two-way repeated measures ANOVA followed by Sidak's post hoc test analysed the influence of the number of cleanings and substance type on these parameters (α = 0.05).</p><p><strong>Results: </strong>Considering the number of cleanings, image brightness varied for CHX AL in the Express system and CHX AQ in the VistaScan system, with no consistent pattern (P < .05). Noise varied for both substances in the VistaScan system, also without a clear pattern (P < .05). In the Express system, regarding the substance type, CHX AL resulted in lower brightness and CHX AQ in lower noise after 75 cleanings (P < .05). Contrast and uniformity were not affected by either the number of cleanings or the substance type (P > .05). Despite numerical variations in some objective parameters, overall image quality remained stable across all cleanings for both substances. No artefacts were observed in the images.</p><p><strong>Conclusion: </strong>Regarding image quality, 2% chlorhexidine-whether aqueous or alcohol-based-can be recommended for PSP plates cleaning.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":"362-369"},"PeriodicalIF":4.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145970688","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":"Impact of rubber dam thickness on image quality parameters in photostimulable phosphor plates.","authors":"Şelale Özel, Hakan Amasya, Deniz Yanık Nalbantoğlu","doi":"10.1093/dmfr/twag012","DOIUrl":"10.1093/dmfr/twag012","url":null,"abstract":"<p><strong>Objective: </strong>The aim of this study is to investigate the effects of different rubber dam thicknesses on image quality in 2 exposure protocols.</p><p><strong>Methods: </strong>For the study, 3 rubber dam thicknesses were used: thin (0.14 mm), medium (0.18 mm), and heavy (0.22 mm). To mimic clinical conditions, a rubber dam was used in 2 layers. Exposure was performed using 2 different protocols: Protocol 1: 0.080 s exposure time, 65 kV, 7 mA, and Protocol 2: 0.160 s exposure time, 65 kV, 7 mA. For each thickness and protocol, 47 measurements were taken (n = 47). Radiographic images were exported in TIFF and analysed using ImageJ software. The region of interest (ROI) was determined, and signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), Michelson, and Weber contrast values were obtained. One-way ANOVA, post hoc Tukey, and intra-class correlation were used for statistical analysis.</p><p><strong>Results: </strong>No statistical difference was detected for Protocol 1 between rubber dam thicknesses in SNR, CNR, Michelson, and Weber contrasts (P > .05). For protocol 2 (longer exposure time), heavy and medium thickness had lower SNR and CNR values than the thin one (P < .05). Michelson and Weber contrasts were statistically changed in different thicknesses of rubber dam (P < .05). ICC values were good and excellent.</p><p><strong>Conclusions: </strong>The thick rubber dam reduced SNR and CNR values; likewise, Michelson and Weber contrasts were changed, which pointed a reduced image quality and negatively affected object visibility. Short exposure times are recommended to maintain image quality in clinical situations requiring the use of a thick rubber dam.</p>","PeriodicalId":11261,"journal":{"name":"Dento maxillo facial radiology","volume":" ","pages":"392-398"},"PeriodicalIF":4.0,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146212392","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}