International Journal of Computerized Dentistry最新文献

{"title":"Radiopaque marker impression and 3D Boolean inversion for metal artifact-distorted same-day implant planning: a digital workflow.","authors":"Chunxu Liu, In Meei Tew, Xin-Fang Leong, Shahida Mohd-Said","doi":"10.3290/j.ijcd.b6429781","DOIUrl":"https://doi.org/10.3290/j.ijcd.b6429781","url":null,"abstract":"<p><p>The present article describes a dental implant planning workflow to solve the CBCT artifact problem. The technique uses a radiopaque 3D-printed tray to take impressions and complete data alignment of the dental arches where implants are planned. From the impressions, 3D Boolean inversion is performed to obtain the surface mesh of teeth and virtually remove the undercut of dentition mesh before an implant surgical guide is designed. The trueness and precision of 3D alignment are then compared with the original radiographic template alignment using the double-scan method. In the present study, the results showed that this method could improve alignment trueness and allow for the elimination of radiographic template making, reducing patient visits and making possible a same-day guided implant surgery.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"28 3","pages":"283-294"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144975076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"User experience of and satisfaction with computer-aided design software when designing dental prostheses: a multicenter survey study.","authors":"Thaw Thaw Win, Hang-Nga Mai, Shilpa Rana, Hyeong-Seob Kim, Ahran Pae, Seoung-Jin Hong, Younghoo Lee, Du-Hyeong Lee","doi":"10.3290/j.ijcd.b5582929","DOIUrl":"10.3290/j.ijcd.b5582929","url":null,"abstract":"<p><strong>Aim: </strong>The present study aimed to compare the responses and satisfaction reported by users with varying levels of experience regarding different types of CAD software programs to design crowns.</p><p><strong>Materials and methods: </strong>A questionnaire was used to evaluate user responses to five domains (software visibility, 3D-scanned data preparation, crown design and adjustment, finish line registration, and overall experience) of various CAD software programs. The study included 50 undergraduate dental students (inexperienced group) and 50 dentists or dental technicians from two hospitals (experienced group). The participants used four different CAD software programs (Meshmixer, Exocad, BlueSkyPlan, and Dentbird) to design crowns, then recorded their responses on a questionnaire. Statistical analyses included one-way and two-way analysis of variance (ANOVA) to compare scores and verify the interaction between user response and experience.</p><p><strong>Results: </strong>User evaluation scores in the domains of software visibility and 3D-scanned data preparation varied between software programs (P 0.001), with Exocad being favored by the experienced group. When evaluating crown design and finish line registration, Dentbird and Exocad scored significantly higher than the other software programs in both groups as they offered automation of the process using deep learning (P 0.001). Two-way ANOVA showed that prior experience of using CAD software significantly affected the users' responses to all questions (P 0.001).</p><p><strong>Conclusions: </strong>User response and satisfaction varied with the type of CAD software program used to design dental prostheses, with prior experience of using such software playing a significant role. Automation of design functions can enhance user satisfaction with the software.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"251-262"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141621209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel digital way to measure the vertical and horizontal dimensions of the supracrestal peri-implant soft tissue.","authors":"Serge Szmukler-Moncler, Ariel Savion, Rasmus Sperber, Roni Kolerman, Florian Beuer","doi":"10.3290/j.ijcd.b5638066","DOIUrl":"10.3290/j.ijcd.b5638066","url":null,"abstract":"<p><strong>Aim: </strong>This article reports on a novel digital superimposition workflow that enables measuring the supracrestal peri-implant soft tissue dimensions at each stage of the implant treatment process and beyond.</p><p><strong>Materials and methods: </strong>A preoperative CBCT scan and intraoral scans (IOSs) were successively taken before surgery, at the end of the healing period, at prosthesis delivery, and over time. The scans were digitally superposed using dedicated software. Then, the stereolithography (STL) files of the healing abutment, prosthetic abutment, and crown were successively merged into the superposition set of IOSs.</p><p><strong>Results: </strong>The workflow protocol of successively merging the STL of each item into the superposition set of IOSs enabled capturing the dimensions of the height and width of the supracrestal soft tissue at every level of the healing abutment, prosthetic abutment, and crown. In addition, it allowed measuring the vertical distance at which the crown exerts pressure on the gingiva as well as the thickness of the papillae at every level of the abutment.</p><p><strong>Conclusion: </strong>This novel digital superimposition workflow provides a straightforward method of measuring the vertical and horizontal dimensions of the supracrestal peri-implant soft tissue, including the papillae, at each stage of the implant treatment process and beyond. It allows investigating a certain number of soft tissue variables that were previously inaccessible to clinical research. The workflow should help to enhance our comprehension of peri-implant soft tissue dynamics.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"235-249"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141789558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of digital manufacturing methods on the accuracy of ceramic crowns.","authors":"Sultan Ainoosah, Marwa S Alzemei, Osama A Bagabas, Tahani M Binaljadm, Ahmed E Farghal, Ahmad A Alnazzawi, Ahmed Yaseen Alqutaibi, Mohammed A Alghauli","doi":"10.3290/j.ijcd.b5814196","DOIUrl":"10.3290/j.ijcd.b5814196","url":null,"abstract":"<p><strong>Objective: </strong>The purpose of the present study was to assess the accuracy of full-coverage crowns produced by two manufacturing methods: additive 3D printing and subtractive milling utilizing three different predefined cement spaces.</p><p><strong>Materials and methods: </strong>Nine groups were allocated based on the manufacturing method and the predefined cement space: printed wax with a 20-µm cement space (PW1); printed wax with a 50-µm cement space (PW2); printed wax with a 100-µm cement space (PW3); milled wax with a 20-µm cement space (MW1); milled wax with a 50-µm cement space (MW2); milled wax with a 100-µm cement space (MW3); milled zirconia coping with a 20-µm cement space (MZ1); milled zirconia coping with a 50-µm cement space (MZ2); milled zirconia coping with a 100-µm cement space (MZ3). All fabricated specimens were scanned using a Medit Identica Blue 3D scanner and saved as standard tessellation language (STL) files. A triple scan method was performed using Materialise 3-matic software to assess accuracy. The discrepancy values were recorded in micrometers (µm), and the analysis was conducted using one-way analysis of variance (ANOVA).</p><p><strong>Results: </strong>The wax printing method, with a cement gap design of 100 μm, demonstrated a significant improvement in accuracy compared with the other methods (P 0.01). In contrast, the zirconia milling method exhibited significantly lower accuracy relative to the other techniques (P 0.01). Moreover, different cement spaces resulted in various accuracy levels, but the only statistically significant difference was observed for the 100-µm cement space in the printed wax group (PW3).</p><p><strong>Conclusion: </strong>The additive 3D-printing method exhibited greater accuracy than the subtractive milling method. Furthermore, altering the cement gap was found to impact the accuracy of both techniques, albeit without statistical significance.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"263-273"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142584527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Automated detection of anterior crossbite on intraoral images and videos utilizing deep learning.","authors":"Zhaowu Chai, Zhengyu Wu, Chao Zhang, Jinlin Song","doi":"10.3290/j.ijcd.b5290567","DOIUrl":"10.3290/j.ijcd.b5290567","url":null,"abstract":"<p><strong>Aim: </strong>Malocclusion has emerged as a burgeoning global public health concern. Individuals with an anterior crossbite face an elevated risk of exhibiting characteristics such as a concave facial profile, negative overjet, and poor masticatory efficiency. In response to this issue, a convolutional neural network (CNN)-based model is proposed, designed for the automated detection and classification of intraoral images and videos.</p><p><strong>Materials and methods: </strong>A total of 1865 intraoral images were included in the present study, 1493 (80%) of which were allocated for training, and 372 (20%) for testing the CNN. Additionally, the models on 10 videos were tested, spanning a cumulative duration of 124 s. To assess the performance of the present authors' predictions, metrics including accuracy, sensitivity, specificity, precision, F1 score, area under the precision-recall (AUPR) curve, and area under the receiver operating characteristic (ROC) curve(AUC) were employed.</p><p><strong>Results: </strong>The trained model exhibited commendable classification performance, achieving an accuracy of 0.965 and an AUC of 0.986. Moreover, it demonstrated superior specificity (0.992 vs 0.978 and 0.956, P 0.05) in comparison with assessments by two orthodontists. Conversely, the CNN model displayed diminished sensitivity (0.89 vs 0.96 and 0.92, P 0.05) relative to the orthodontists. Notably, the CNN model accomplished a perfect classification rate, successfully identifying 100% of the videos in the test set.</p><p><strong>Conclusion: </strong>The deep learning (DL) model exhibited remarkable classification accuracy in identifying anterior crossbite through both intraoral images and videos. This proficiency has the potential to expedite the detection of severe malocclusions, facilitating timely classification for appropriate treatment and, consequently, mitigating the risk of complications.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"193-203"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140872173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Volumetric differences in the temporomandibular joint in patients with condylar hyperplasia in the active and passive states: A SPECT/CT study.","authors":"Diego Fernando López","doi":"10.3290/j.ijcd.b5582925","DOIUrl":"10.3290/j.ijcd.b5582925","url":null,"abstract":"<p><strong>Aim: </strong>Condylar hyperplasia (CH) is a progressive and deforming disease that modifies the anatomy of the temporomandibular joint (TMJ) structures. The present study aims to correlate the metabolic bone activity of the condyle measured by single photon emission computed tomography (SPECT) with the volumetry anatomical information from the condyle, fossa, and joint space provided by CT images in patients with CH in the active and passive states.</p><p><strong>Materials and methods: </strong>A cross-sectional comparative study was performed with a set of 116 images from healthy and diagnosed CH patients to compare volumetric measures of the TMJ. Images were acquired through a bone tissue mask using a 3D DICOM reconstruction for SPECT/CT and CBCT images and the threshold option for segmentation with standardized values for each tissue on the Hounsfield unit (HU) scale.</p><p><strong>Results: </strong>Differences were found (P 0.01), with greater condylar volume on the affected side in patients with active compared with passive CH. The volume of the glenoid cavity showed no differences in either state of CH (P > 0.05); however, there were differences for the volume of the joint space on the affected right side of hemimandibular elongation (HE) in the active state. The volume of the mandibular condyle on the affected side in CH cases was larger in HE cases in both active and passive forms (P 0.01) compared with healthy patients (controls). Similar results were presented for the glenoid cavity and joint space.</p><p><strong>Conclusions: </strong>Volumetric anatomical evaluation of TMJ structures as well as information on condylar metabolic activity can be obtained from SPECT/CT. The present study showed a greater condylar volume on the affected side of the CH compared with the contralateral side, but there were more significant differences in the active than in the passive state.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"205-216"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141621210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of thickness and restorative system on the mechanical behavior of CAD/CAM minimally invasive occlusal veneers: an in vitro study.","authors":"Fabio Rizzante, Edgar Maenosono, Ana Flávia Borges, Juliana Bombonatti, Sorin Teich, Adilson Furuse, Sérgio Ishikiriama","doi":"10.3290/j.ijcd.b5290647","DOIUrl":"10.3290/j.ijcd.b5290647","url":null,"abstract":"<p><strong>Aim: </strong>The aim of the present study was to evaluate the physical-mechanical behavior of occlusal veneers when subjected to thermomechanical cycling.</p><p><strong>Materials and methods: </strong>Sixty specimens were divided into four groups (n = 15) according to different restorative materials and thicknesses: lithium disilicate (IPS e.max CAD) and nano-ceramic resin (Lava Ultimate) materials at thicknesses of 0.6 and 1.2 mm. The occlusal veneers were bonded over human freshly extracted flattened molars with dual-polymerizing luting agent (Variolink N and RelyX Ultimate) using the respective adhesive systems following the selective-etch technique (self-etch in dentin and total-etch in enamel). The resin cement was light cured for 40 s on each face using light-emitting diode (LED) light-cure equipment (Blue Star 2; 1100 mW/cm2). The response variables were veneer survival rates (crack formation, catastrophic cracks, and debonding) when subjected to thermal cycling from 5°C to 55°C and simultaneous mechanical cycling performed at load intensities of 100, 200, 300, 400, and 450 N for 20,000 cycles each.</p><p><strong>Results: </strong>Data were submitted to the Kruskal-Wallis test and pairwise comparison, adopting a significance level of 5%. The occlusal veneers made of nano-ceramic resin presented a lower incidence of failures (P 0.05) than those made of lithium disilicate. According to the thickness factor, 1.2-mm-thick occlusal veneers withstood higher cycling loads.</p><p><strong>Conclusion: </strong>The occlusal veneers made of nano-ceramic resin with a 1.2-mm thickness presented superior physical-mechanical behavior than those made of lithium disilicate with a 0.6-mm thickness. (Int J Comput Dent 2025;28(3):275-0; doi: 10.3290/j.ijcd.b5290647).</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"275-282"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140874959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patients' perspective on the inclusion of intraoral scanners in routine oral examination: a clinical perception study.","authors":"İsmail Serhat Sadikoğlu, Melin Balci","doi":"10.3290/j.ijcd.b5628817","DOIUrl":"10.3290/j.ijcd.b5628817","url":null,"abstract":"<p><strong>Aim: </strong>The purpose of the present study was to investigate how integrating intraoral scanners (IOSs) into routine oral diagnosis affects patient-clinician communication as well as patient perceptions and preferences, offering valuable insights into the patient experience and utility of IOSs in clinical practice.</p><p><strong>Materials and methods: </strong>A restorative dentistry specialist conducted intraoral examinations on 300 patients, initially using conventional techniques and radiographs, followed by a 3D intraoral scanner (iTero Element 2). The patients' existing oral issues and treatment plans were initially expressed verbally, and then repeated using the 3D intraoral scan. Subsequently, the patients were requested to respond to an 11-question survey, aimed at assessing both modes of examination and communication. Statistical analysis employed the Wilcoxon test to compare the patients' experiences on the same topic before and after the examination with the IOSs, considering a significance level of P 0.05.</p><p><strong>Results: </strong>The majority (38%) of participants were 25 to 35 years of age (52% females; 48% males). Statistically, patients found it more comprehensible to visualize existing oral issues through 3D intraoral scans than through a verbal explanation (P = 0.000). Also, patients understood oral hygiene recommendations better when explained by dentists through the use of intraoral scans (P = 0.000). The vast majority of participants (94%) indicated that being examined with an IOS motivated them to obtain treatment, while 6% remained undecided. All of the participants thought that intraoral scanning should be included in routine oral examination.</p><p><strong>Conclusion: </strong>Intraoral 3D scans enhance patient understanding and communication during routine oral examination and participants showed a high preference for their usage. However, more research is needed to replace conventional diagnostic methods.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"217-224"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141789489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vacation - a time to gather ideas and recharge your batteries.","authors":"Florian Beuer","doi":"10.3290/j.ijcd.b6530808","DOIUrl":"https://doi.org/10.3290/j.ijcd.b6530808","url":null,"abstract":"","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"28 3","pages":"187-188"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144975111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of intraoral scanners in the cleft anatomy of neonates.","authors":"Raphael Ferrari, Mutlu Özcan, Daniel Wiedemeier, Harald Essig","doi":"10.3290/j.ijcd.b5886430","DOIUrl":"10.3290/j.ijcd.b5886430","url":null,"abstract":"<p><strong>Aim: </strong>The present study investigated the accuracy of intraoral scanners (IOSs) based on different image acquisition technologies in the field of presurgical orthopedic treatment (PSOT) in neonates with cleft palate.</p><p><strong>Materials and methods: </strong>Dental casts of clinical situations representing unilateral cleft lip and palate (UCLP), bilateral cleft lip and palate (BCLP), and cleft palate (CP) with reference polyetheretherketone (PEEK) scanbodies (Cares RC Mono Scanbody) were scanned utilizing four IOS systems: Carestream CS3600 (CS), Medit i500 (MD), Cerec Omnicam (CO), and Trios 3 (TS). One calibrated operator made five scans from each model using each IOS (N = 60). Reference digital impressions were obtained by an industrial-grade laboratory scanner (Sirona inEos X5) and superimposed using a best-fit algorithm. The divergence measure was extracted and the scanners were compared in terms of their accuracy using generalized least squares statistical models that account for variance heterogeneity. Additionally, comparative 3D analysis of the scans was performed using reverse engineering software (Geomagic Control X) in order to measure the discrepancy between the intraoral scans and the reference scan in five different anatomical regions of interest (ROIs): alveolar crest (AC), cleft (CL), palate (PL), vestibulum (VS), premaxilla (PM).</p><p><strong>Results: </strong>The four IOSs showed relevant and significant differences in estimated trueness (P 0.001) and precision (P = 0.009). Among all anatomical models and analyzed ROIs, TS had the best accuracy (trueness: -1.57 µm; precision: 9.41 µm), followed by MD (trueness: -20.63 µm; precision: 29.18 µm), CS (trueness: -40.43 µm; precision: 16.52 µm) and CO (trueness: 81.27 µm; precision: 40.32 µm).</p><p><strong>Conclusions: </strong>Impression taking of the maxilla in cleft lip and palate patients is challenging for the operator. Relevant and significant differences in trueness and precision were found between the four IOSs. TS showed the best accuracy and was the least influenced under different anatomical ROIs. (Int J Comput Dent 2025;28(3):225-0; doi: 10.3290/j.ijcd.b5886430).</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"225-234"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143053964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}