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The test group consisted of a bone level (<jats:styled-content style=\"fixed-case\">BL<\/jats:styled-content>) neck design exhibiting a hydrophilic micro\u2010rough surface combined with a platform\u2010switching interface (<jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content>) (<jats:italic>n<\/jats:italic>\u00a0=\u00a020). The control group comprised a soft tissue level (<jats:styled-content style=\"fixed-case\">STL<\/jats:styled-content>) neck design exhibiting a hydrophobic machined surface with a matching butt\u2010joint interface (<jats:italic>n<\/jats:italic>\u00a0=\u00a041). Standardized clinical, radiologic, and esthetic parameters were applied. The facial bone crest dimensions were assessed by<jats:styled-content style=\"fixed-case\">CBCT<\/jats:styled-content>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Soft tissue parameters and pink esthetic scores yielded no significant differences between the two designs. Major differences were only observed at the implant shoulder level. The height of the facial bone crest for the<jats:styled-content style=\"fixed-case\">BL<\/jats:styled-content>design was located 0.2\u00a0mm above the implant shoulder level, whereas for the<jats:styled-content style=\"fixed-case\">STL<\/jats:styled-content>design, its location was 1.6\u00a0mm below. The width of the peri\u2010implant saucer\u2010like bone defect was reduced by 40% for the<jats:styled-content style=\"fixed-case\">BL<\/jats:styled-content>implant design. No differences were observed 2\u00a0mm below the shoulder level.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The results of this comparative study suggest better crestal bone stability on the facial aspect of single implant sites in the esthetic zone for a<jats:styled-content style=\"fixed-case\">BL<\/jats:styled-content>design with a platform\u2010switching concept when compared with<jats:styled-content style=\"fixed-case\">STL<\/jats:styled-content>implants with a butt\u2010joint interface.<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.12692","type":"journal-article","created":{"date-parts":[[2015,9,15]],"date-time":"2015-09-15T11:54:58Z","timestamp":1442318098000},"page":"1055-1064","source":"Crossref","is-referenced-by-count":44,"title":["Influence of implant neck design on facial bone crest dimensions in the esthetic zone analyzed by cone beam<scp>CT<\/scp>: a comparative study with a 5\u2010to\u20109\u2010year 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