{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,28]],"date-time":"2026-06-28T07:59:05Z","timestamp":1782633545766,"version":"3.54.5"},"reference-count":84,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,12,18]],"date-time":"2018-12-18T00:00:00Z","timestamp":1545091200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The aim of this study was to compare clinical and radiographic outcomes of dental implants with different neck characteristics.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A protocol\u2010oriented search aimed at the question: \u201cIn patients subjected to tooth replacement with screw\u2010type dental implants does the modification of the implant neck macro\u2010 or microgeometry contribute to the improvement of survival rates and maintenance of the peri\u2010implant marginal bone levels?\u201d Primary outcomes were survival and marginal bone level (MBL) changes evaluated on randomized controlled trials with &gt;10 participants and follow\u2010up &gt;1\u00a0year. Risk of bias was evaluated using the Cochrane Collaboration's tool. The review follows the PRISMA statement.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Forty\u2010three studies compared: (a) One\u2010 versus two\u2010piece implants (<jats:italic>N<\/jats:italic>\u00a0=\u00a07); (b) Two\u2010piece implants with different neck characteristics (machined and rough collars, microthreads, LASER microtexturing) (<jats:italic>N<\/jats:italic>\u00a0=\u00a021); (c) Two\u2010piece implants with macrogeometry modifications (tapering, back\u2010tapering, and scalloping) (<jats:italic>N<\/jats:italic>\u00a0=\u00a06). One\u2010 and two\u2010piece implants showed similar survival (RR\u00a0=\u00a00.45, 95% CI: [0.12, 1.66], <jats:italic>p<\/jats:italic>\u00a0=\u00a00.23) and MBL changes (WMD\u00a0=\u00a00.09\u00a0mm, 95% CI: [\u22120.27, 0.45], <jats:italic>p<\/jats:italic>\u00a0=\u00a00.64) at 1\u2010year post\u2010loading. Machined collar implants have higher risk of early failure than rough collar implants (RR\u00a0=\u00a03.96, 95% CI: [1.12, 13.93], <jats:italic>p<\/jats:italic>\u00a0=\u00a00.03) and 0.43\u00a0mm higher bone resorption (95% CI: [0.0, 0.86], <jats:italic>p<\/jats:italic>\u00a0=\u00a00.05). Microthreads (WMD\u00a0=\u00a00.07\u00a0mm, 95% CI: [\u22120.01, 0.15], <jats:italic>p<\/jats:italic>\u00a0=\u00a00.10) and LASER microtexturing (WMD\u00a0=\u00a00.15\u00a0mm, 95% CI: [\u22120.35, 0.65], <jats:italic>p<\/jats:italic>\u00a0=\u00a00.56) do not reduce bone resorption. Scalloped implants have 1.26\u00a0mm higher resorption (95% CI: [0.72, 2.00], <jats:italic>p<\/jats:italic>\u00a0&lt;\u00a00.001).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>One\u2010 and two\u2010piece implants have similar survival and MBL changes. Rough collar implants have lower MBL changes than machined collar implants. Additional modifications to rough collars are irrelevant.<\/jats:p><\/jats:sec>","DOI":"10.1111\/clr.13389","type":"journal-article","created":{"date-parts":[[2018,11,22]],"date-time":"2018-11-22T17:58:56Z","timestamp":1542909536000},"page":"20-48","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":54,"title":["Titanium dental implants with different collar design and surface modifications: A systematic review on survival rates and marginal bone levels"],"prefix":"10.1111","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4019-9379","authenticated-orcid":false,"given":"Ana","family":"Messias","sequence":"first","affiliation":[{"name":"Dentistry Department Faculty of Medicine of the University of Coimbra Coimbra Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro","family":"Nicolau","sequence":"additional","affiliation":[{"name":"Dentistry Department Faculty of Medicine of the University of Coimbra Coimbra Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fernando","family":"Guerra","sequence":"additional","affiliation":[{"name":"Dentistry Department Faculty of Medicine of the University of Coimbra Coimbra Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,12,18]]},"reference":[{"key":"e_1_2_8_2_1","first-page":"188","article-title":"Five\u2010year treatment outcomes with three brands of implants supporting mandibular overdentures","volume":"26","author":"Akoglu B.","year":"2011","journal-title":"International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.3109\/17453678108991776"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0757.1994.tb00006.x"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12017"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2010.02004.x"},{"key":"e_1_2_8_7_1","first-page":"123","article-title":"Comparison of variable\u2010thread tapered implant designs to a standard tapered implant design after immediate loading. A 3\u2010year multicentre randomised controlled trial","volume":"5","author":"Arnhart C.","year":"2012","journal-title":"European Journal of Oral Implantology"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.1999.tb00087.x"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2004.01028.x"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2002.tb00161.x"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2004.tb00213.x"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1563\/AAID-JOI-D-11-00104"},{"key":"e_1_2_8_13_1","first-page":"290","article-title":"Implant neck configurations for preservation of marginal bone level: A systematic review","volume":"26","author":"Bateli M.","year":"2011","journal-title":"International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prosdent.2004.07.024"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/0142-9612(83)90065-0"},{"key":"e_1_2_8_16_1","first-page":"1","article-title":"Osseointegrated implants in the treatment of the edentulous jaw. Experience from a 10\u2010year period","volume":"16","author":"Branemark P. I.","year":"1977","journal-title":"Scandinavian Journal of Plastic and Reconstructive Surgery and Hand Surgery"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/clr.12444"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2000.011S1059.x"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12143"},{"key":"e_1_2_8_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijom.2014.11.011"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jdent.2014.12.013"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.1002\/sim.1205"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1002\/sim.1206"},{"key":"e_1_2_8_24_1","doi-asserted-by":"crossref","first-page":"1289","DOI":"10.1111\/j.1600-0501.2010.02109.x","article-title":"Single implants with different neck designs in the aesthetic zone: A randomized clinical trial","volume":"22","author":"Hartog L.","year":"2011","journal-title":"Clinical Oral Implants Research"},{"key":"e_1_2_8_25_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12498"},{"key":"e_1_2_8_26_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2011.00372.x"},{"key":"e_1_2_8_27_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.315.7109.629"},{"key":"e_1_2_8_28_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2002.130103.x"},{"key":"e_1_2_8_29_1","first-page":"CD003815","article-title":"Interventions for replacing missing teeth: Different types of dental implants","volume":"7","author":"Esposito M.","year":"2014","journal-title":"Cochrane Database of Systematic Reviews"},{"key":"e_1_2_8_30_1","doi-asserted-by":"publisher","DOI":"10.11607\/prd.1747"},{"key":"e_1_2_8_31_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2842.2012.02343.x"},{"key":"e_1_2_8_32_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2006.00017.x"},{"key":"e_1_2_8_33_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2002.tb00171.x"},{"key":"e_1_2_8_34_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12604"},{"key":"e_1_2_8_35_1","doi-asserted-by":"publisher","DOI":"10.11607\/prd.2273"},{"key":"e_1_2_8_36_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.4563"},{"key":"e_1_2_8_37_1","doi-asserted-by":"publisher","DOI":"10.1111\/jcpe.12244"},{"key":"e_1_2_8_38_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.3087"},{"key":"e_1_2_8_39_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.3805"},{"key":"e_1_2_8_40_1","unstructured":"Higgins J. P. &Green S.(Eds.) (2011).Cochrane handbook for systematic reviews of interventions version 5.1.0[updated March 2011]. The Cochrane Collaboration. Retrieved fromhttp:\/\/www.handbook.cochrane.org\/"},{"key":"e_1_2_8_41_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12042"},{"key":"e_1_2_8_42_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.4189"},{"key":"e_1_2_8_43_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.2010.01626.x"},{"issue":"4","key":"e_1_2_8_44_1","first-page":"326","article-title":"Regeneration of gingival papillae after single-implant treatment","volume":"17","author":"Jemt T.","year":"1997","journal-title":"International Journal of Periodontics & Restorative Dentistry"},{"key":"e_1_2_8_45_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2011.02298.x"},{"key":"e_1_2_8_46_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-3913(09)60060-3"},{"key":"e_1_2_8_47_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2009.01871.x"},{"key":"e_1_2_8_48_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.3180"},{"key":"e_1_2_8_49_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.2017.4.gomi"},{"key":"e_1_2_8_50_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2007.01302.x"},{"key":"e_1_2_8_51_1","doi-asserted-by":"publisher","DOI":"10.1111\/clr.12544"},{"key":"e_1_2_8_52_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2004.01024.x"},{"key":"e_1_2_8_53_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2001.120504.x"},{"key":"e_1_2_8_54_1","doi-asserted-by":"publisher","DOI":"10.1111\/clr.12644"},{"key":"e_1_2_8_55_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0757.1994.tb00008.x"},{"key":"e_1_2_8_56_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1399-302X.1987.tb00298.x"},{"issue":"2","key":"e_1_2_8_57_1","first-page":"107","article-title":"Gingival sulcus bleeding--a leading symptom in initial gingivitis","volume":"15","author":"M\u00fchlemann H. R.","year":"1971","journal-title":"Helvetica Odontologica Acta"},{"key":"e_1_2_8_58_1","first-page":"384","article-title":"Connective tissue attachment to laser\u2010microgrooved abutments: A human histologic case report","volume":"32","author":"Nevins M.","year":"2012","journal-title":"International Journal of Periodontics & Restorative Dentistry"},{"key":"e_1_2_8_59_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcms.2012.11.027"},{"key":"e_1_2_8_60_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2008.01684.x"},{"key":"e_1_2_8_61_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2002.73.3.322"},{"key":"e_1_2_8_62_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2012.02562.x"},{"key":"e_1_2_8_63_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2012.00465.x"},{"key":"e_1_2_8_64_1","first-page":"47","article-title":"Three\u2010year post\u2010loading results of a randomised, controlled, split\u2010mouth trial comparing implants with different prosthetic interfaces and design in partially posterior edentulous mandibles","volume":"7","author":"Pozzi A.","year":"2014","journal-title":"European Journal of Oral Implantology"},{"key":"e_1_2_8_65_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2012.02524.x"},{"key":"e_1_2_8_66_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2003.tb00016.x"},{"key":"e_1_2_8_67_1","first-page":"183","article-title":"Comparison of bone loss around bone platform shift and non\u2010bone platform shift implants after 12 months","volume":"12","author":"Rokn A. R.","year":"2015","journal-title":"Journal of Dentistry (Tehran)"},{"key":"e_1_2_8_68_1","doi-asserted-by":"publisher","DOI":"10.1111\/clr.12667"},{"key":"e_1_2_8_69_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12107"},{"key":"e_1_2_8_70_1","doi-asserted-by":"publisher","DOI":"10.1111\/cid.12482"},{"key":"e_1_2_8_71_1","first-page":"789","article-title":"Radiographic evaluation of marginal bone level around implants with different neck designs after 1 year","volume":"21","author":"Shin Y. K.","year":"2006","journal-title":"International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_8_72_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2011.09.006"},{"key":"e_1_2_8_73_1","doi-asserted-by":"publisher","DOI":"10.3109\/00016356408993968"},{"key":"e_1_2_8_74_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022-3913(89)90081-4"},{"key":"e_1_2_8_75_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2009.090330"},{"key":"e_1_2_8_76_1","first-page":"675","article-title":"Implant materials, designs, and surface topographies: Their effect on osseointegration. A literature review","volume":"15","author":"Sykaras N.","year":"2000","journal-title":"International Journal of Oral & Maxillofacial Implants"},{"key":"e_1_2_8_77_1","first-page":"1","article-title":"Survival and success rates of different shoulder designs: A systematic review of the literature","volume":"6812875","author":"Tallarico M.","year":"2018","journal-title":"International Journal of Dentistry Article ID"},{"key":"e_1_2_8_78_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.2010.01638.x"},{"key":"e_1_2_8_79_1","doi-asserted-by":"publisher","DOI":"10.1111\/clr.12581"},{"key":"e_1_2_8_80_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2000.011003202.x"},{"key":"e_1_2_8_81_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-0501.2009.01768.x"},{"key":"e_1_2_8_82_1","doi-asserted-by":"publisher","DOI":"10.11607\/ijp.4063"},{"key":"e_1_2_8_83_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.1994.tb00748.x"},{"key":"e_1_2_8_84_1","doi-asserted-by":"publisher","DOI":"10.1902\/jop.2014.140107"},{"key":"e_1_2_8_85_1","doi-asserted-by":"publisher","DOI":"10.1002\/jbm.a.30320"}],"container-title":["Clinical Oral Implants Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fclr.13389","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/clr.13389","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/clr.13389","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/clr.13389","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,9,14]],"date-time":"2023-09-14T22:04:28Z","timestamp":1694729068000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/clr.13389"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,12,18]]},"references-count":84,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2019,1]]}},"alternative-id":["10.1111\/clr.13389"],"URL":"https:\/\/doi.org\/10.1111\/clr.13389","archive":["Portico"],"relation":{},"ISSN":["0905-7161","1600-0501"],"issn-type":[{"value":"0905-7161","type":"print"},{"value":"1600-0501","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,12,18]]},"assertion":[{"value":"2017-06-17","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2018-11-04","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2018-12-18","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}