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The study compares 60 zirconia crowns produced from identical typodont molar preparations using three CAD/CAM workflows. Silicone replica measurements under a stereomicroscope quantify marginal gap and internal fit, with one-way ANOVA and Tukey post-hoc testing (α=0.05). EXOCAD-Amann Girrbach shows the smallest gaps and best internal fit, followed by 3Shape-Roland and then CEREC, with significant differences (P\u003C0.001).",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/marginal-adaptation-and-internal-fit-of-zirconia-crowns-original-article/460215/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/marginal-adaptation-and-internal-fit-of-zirconia-crowns-original-article/460215.png","ImageObject",300,407,{"name":92,"@type":93},"Blue Pony","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-07","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What was the main objective of the study?","Question",{"text":112,"@type":113},"To evaluate and compare the marginal adaptation and internal fit of zirconia crowns fabricated using three commonly used CAD/CAM systems.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How were marginal adaptation and internal fit measured?",{"text":117,"@type":113},"Marginal adaptation and internal fit were measured using the silicone replica technique under a stereomicroscope.",{"name":119,"@type":110,"acceptedAnswer":120},"Which CAD/CAM combination produced the best results?",{"text":121,"@type":113},"The EXOCAD-Amann Girrbach combination yielded the smallest mean marginal gap and the lowest internal fit values among the groups.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},460215,1790758032,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":39,"preview_page_count":4},962090760266,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Original Article  \nMarginal Adaptation and Internal Fit of Zirconia Crowns Fabricated with Different CAD/CAM Systems  \nBhagyashree Gurunath Kalsekar1, Papala Sesha Reddy2, S. Lakshmi Prasanna3, Richa Ranjan Sahai4, Sumit Bhatt5, Mrunal Dave6  \n1Department of Prosthodontics, Bharati Vidyapeeth Deemed tobe University Dental College and Hospital, Pune, Maharashtra,  \nIndia, 2Department of Prosthodontics, Government Dental College and Hospital, RIMS, Putlampalli,  \nAndhra Pradesh,  \nIndia, 3Department of Prosthodontics, Sree Balaji Dental College and Hospital, Chennai, Tamil Nadu, India, 4Department of Prosthodontics, Ranjeet Deshmukh Dental College and Research Centre, Nagpur, Maharashtra, India, 5Department of Oral and Maxillofacial Surgery, Rajasthan Dental College and Hospital, Nirwan University, Jaipur, Rajasthan, India, 6Dentistry, Bethlehem Smile Design, Bethlehem, Pennsylvania, USA  \nSubmitted: 07‑Aug‑2025  \nRevised: 12‑Aug‑2025  \nAccepted: 19‑Aug‑2025  \nPublished: 17‑Dec‑2025  \nAbstract  \nBackground: The precision of marginal adaptation and internal fit plays a critical role in the longevity and clinical success of zirconia crowns. Computer‑aided design and computer‑aided manufacturing (CAD/CAM) systems have revolutionized dental prosthesis fabrication, yet discrepancies exist in their accuracy. Methods: A total of 60 zirconia crowns were fabricated on identical typodont molar preparations using three CAD/CAM workflows (n = 20 per group) . Marginal adaptation and internal fit were measured using the silicone replica technique under a stereomicroscope. Descriptive statistics were calculated, and comparisons were made using one‑way ANOVA followed by post‑hoc Tukey test (α = 0.05) . Results: The mean marginal gap was smallest in the EXOCAD‑Amann Girrbach group (45.3 ± 4.8 µm), followed by the 3Shape‑Roland group (57.2 ± 5.1 µm), and largest in the CEREC group (69.5 ± 6.3 µm) . Internal fit values followed a similar trend: EXOCAD‑Amann Girrbach (82.6 ± 6.9 µm), 3Shape‑Roland (94.2 ± 7.4 µm), and CEREC (108.5 ± 8.1 µm) . Statistically significant differences were observed among all groups (P \u003C 0.001) . Conclusion: The choice of CAD/CAM system significantly affects the marginal adaptation and internal fit of zirconia crowns. The EXOCAD‑Amann Girrbach combination yielded superior outcomes and maybe recommended for clinical applications requiring high precision.  \nKeywords: CAD/CAM, digital dentistry, internal fit, marginal adaptation, stereomicroscopy, zirconia crowns   \nIntroduction  \nirconia crowns  \nZprosthodontics due  \nhave gained popularity into their favorable mechanical  \nproperties, biocompatibility, and esthetics.[1] Precise marginal adaptation and internal fit are vital to minimize cement dissolution, plaque accumulation, and secondary caries, ensuring long‑term clinical success.[2,3] Computer‑aided design and computer‑aided manufacturing (CAD/CAM) technology enables the digital fabrication  \n\n| Access this article online |  |\n| --- | --- |\n| Quick Response Code:\u003Cbr>| Website: [https://journals.lww.com/jpbs](https://journals.lww.com/jpbs) |\n|  | DOI: 10.4103/jpbs.jpbs_1413_25 |\n\nof restorations, offering consistency, time efficiency, and reduced manual errors.[4] However, differences in software algorithms, scanner precision, and milling units among CAD/CAM systems may impact the fit  \n\n| Address for correspondence: Dr. Bhagyashree Gurunath Kalsekar, Department of Prosthodontics, Bharati Vidyapeeth Deemed to be University Dental College and Hospital, Pune, Maharashtra, India. E‑mail: [bhagyashree.kalsekar@bharatividyapeeth.edu](bhagyashree.kalsekar@bharatividyapeeth.edu) |\n| --- |\n| This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License (CC BY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.\u003Cbr>For re","cbCaiimsoOXPVndJ","https://ap.wps.com/l/cbCaiimsoOXPVndJ","pdf",568183,"English","# Abstract\n## Background\n## Methods\n## Results\n## Conclusion\n# Introduction\n## Importance of fit\n## CAD/CAM variability\n## Study aim and null hypothesis\n# Materials and Methods","[{\"question\":\"What was the main objective of the study?\",\"answer\":\"To evaluate and compare the marginal adaptation and internal fit of zirconia crowns fabricated using three commonly used CAD/CAM systems.\"},{\"question\":\"How were marginal adaptation and internal fit measured?\",\"answer\":\"Marginal adaptation and internal fit were measured using the silicone replica technique under a stereomicroscope.\"},{\"question\":\"Which CAD/CAM combination produced the best results?\",\"answer\":\"The EXOCAD-Amann Girrbach combination yielded the smallest mean marginal gap and the lowest internal fit values among the groups.\"}]","Marginal Adaptation and Internal Fit of Zirconia Crowns - Original Article | PDF"]