{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,18]],"date-time":"2026-06-18T06:05:53Z","timestamp":1781762753313,"version":"3.54.5"},"reference-count":30,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2024,1,3]],"date-time":"2024-01-03T00:00:00Z","timestamp":1704240000000},"content-version":"vor","delay-in-days":2,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Esthet Restor Dent"],"published-print":{"date-parts":[[2024,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The aim of this randomized, prospective, and clinical multicenter study was to compare the overall clinical performance of two restorative options over a 5\u2010year period: individualized CAD\/CAM abutments veneered with a hand\u2010layered ceramic, and prefabricated zirconium dioxide abutments veneered with press ceramic and inserted into a single edentulous gap in the anterior maxilla.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>Forty subjects were recruited from two universities: 20 from the University of XX and 20 from the University of XY. Each subject received an implant to restore a single edentulous gap in the maxillary anterior region (14\u201324 FDI). 20 patients were randomized into each Group. Group A received a one\u2010piece single crown produced from a prefabricated zirconia abutment with pressed ceramic and Group B received an individualized CAD\/CAM zirconia abutment with a hand\u2010layered technique. After 5\u2009years, the aesthetic and radiographic parameters were assessed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Group A had four dropouts and one failure, resulting in a 95% survival rate and 95% success rate. Group B had two dropouts and two failures which resulted in a 90% survival rate and 90% success rate. No crestal bone level changes were observed, with a mean DIB of 0.06\u2009mm in Group A and 0.09\u2009mm in Group B. No statistically significant differences were present at baseline, 6\u2009months, 1\u2009year, 3\u2009years, or 5\u2009years for DIB values between time points and groups. Pink aesthetic score\/white aesthetic score, Peri\u2010Implant and Crown Index, and Implant Crown Aesthetic Index values were stable over time at all five points for both groups.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Both implant\u2010supported restorative options represent a valuable treatment option for the restoration of implant crowns in the anterior maxilla.<\/jats:p><\/jats:sec><jats:sec><jats:title>Clinical Significance<\/jats:title><jats:p>In general, the use of ceramic abutments in the anterior zone represents a valuable treatment procedure with both standardized and CAD\/CAM individualized abutments and following the recommendations from the respective manufacturer(s).<\/jats:p><\/jats:sec>","DOI":"10.1111\/jerd.13188","type":"journal-article","created":{"date-parts":[[2024,1,4]],"date-time":"2024-01-04T06:33:16Z","timestamp":1704349996000},"page":"164-173","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Implant\u2010supported single all\u2010ceramic crowns made from prefabricated (stock) or individualized CAD\/CAM zirconia abutments: A 5\u2009year randomized clinical trial"],"prefix":"10.1111","volume":"36","author":[{"given":"Julia\u2010Gabriela","family":"Wittneben","sequence":"first","affiliation":[{"name":"Private Practice  Z\u00fcrich Switzerland"},{"name":"Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine University of Bern  Bern Switzerland"},{"name":"Department of Restorative Dentistry and Biomaterials Sciences Harvard School of Dental Medicine  Boston Massachusetts 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