The Journal of Oral Implantology Editorial staff has discovered that the article published as "in-press" electronically by JOI titled, "Immediate Placement and Provisionalization of Implant-Supported, Single-Tooth Restorations: A Retrospective Study," by Edgard El Chaar, DDS, MS, and Raphael Bettach (doi: 10.1563/ AAID-JOI-D-11-00071; PMID: 21905899) has previously been published in the International Journal of Periodontics and Restorative Dentistry under the title, "Immediate Placement and Provisionalization of Implant-Supported, Single-Tooth Restorations: A Retrospective Study," by Edgard S. El-Chaar, DDS, MS (2011;31:409-419; PMID: 21837307). As this constitutes duplicate publication, which is against JOI editorial policy, the article has been retracted by the American Academy of Implant Dentistry, publisher of Journal of Oral Implantology.