{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T23:52:00Z","timestamp":1781740320863,"version":"3.54.5"},"reference-count":39,"publisher":"Georg Thieme Verlag KG","license":[{"start":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T00:00:00Z","timestamp":1781654400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Eur J Dent"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Peri-implant diseases are common plaque-related conditions, and implant design may influence peri-implant inflammation. Two-piece systems include an implant\u2013abutment micro-gap, while one-piece implants eliminate this interface. This narrative review aims to integrate microbiological, biomechanical, and clinical evidence to evaluate whether eliminating the implant\u2013abutment micro-gap in one-piece implants is associated with differences in peri-implant inflammation and marginal bone level changes compared with two-piece systems. A focused narrative review was conducted using PubMed\/MEDLINE, Scopus, and Web of Science. The search combined keywords related to implant\u2013abutment interface, micro-gap, bacterial leakage, biomechanical behavior, and peri-implant disease. Studies published mainly between 2000 and 2024 were included, together with relevant earlier studies. A series of studies was analyzed across microbiological, biomechanical, and clinical domains. Experimental studies show that micro-gaps in two-piece implants may allow bacterial leakage, especially under loading conditions, potentially contributing to local inflammation. Biomechanical analyses suggest that one-piece implants may distribute occlusal forces more evenly, while some two-piece designs may concentrate stress at the crestal level. Clinical studies generally report similar implant survival and marginal bone levels, with only limited differences in inflammatory parameters. Eliminating the implant\u2013abutment interface may reduce bacterial leakage and micromovement and improve mechanical behavior in certain situations. Current evidence does not demonstrate a clear clinical advantage of one-piece implants, as outcomes are mainly influenced by surgical factors, loading conditions, and long-term maintenance.<\/jats:p>","DOI":"10.1055\/s-0046-1824451","type":"journal-article","created":{"date-parts":[[2026,6,17]],"date-time":"2026-06-17T23:03:02Z","timestamp":1781737382000},"source":"Crossref","is-referenced-by-count":0,"title":["Implant\u2013Abutment Interface and Peri-implant Inflammation in One-Piece and Two-Piece Dental Implants: A Narrative Review"],"prefix":"10.1055","author":[{"given":"Kreshnik","family":"\u00c7ota","sequence":"additional","affiliation":[{"name":"Department of Dentistry, Faculty of Dental Sciences, Aldent University, Tirana, Albania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1659-2453","authenticated-orcid":false,"given":"Agron","family":"Meto","sequence":"additional","affiliation":[{"name":"Department of Dentistry, Faculty of Dental Sciences, Aldent University, Tirana, Albania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luca","family":"Fiorillo","sequence":"additional","affiliation":[{"name":"Department of Dentistry, Faculty of Dental Sciences, Aldent University, Tirana, Albania"},{"name":"Department of Dental Research Cell, Dr. D. Y. Patil Dental College & Hospital, Dr. D. Y. Patil Vidyapeeth, Pimpri, Pune, Maharashtra, India"},{"name":"Department of Medicine and Surgery, University of Enna \u201cKore,\u201d Enna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cosimo","family":"Galletti","sequence":"additional","affiliation":[{"name":"Department of Medicine and Surgery, University of Enna \u201cKore,\u201d Enna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Javier Flores","family":"Fraile","sequence":"additional","affiliation":[{"name":"Department of Surgery, Faculty of Medicine and Dentistry, University of Salamanca, Salamanca, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3354-2194","authenticated-orcid":false,"given":"Aida","family":"Meto","sequence":"additional","affiliation":[{"name":"Department of Dentistry, Faculty of Dental Sciences, Aldent University, Tirana, Albania"},{"name":"Department of Dental Research Cell, Dr. D. Y. Patil Dental College & Hospital, Dr. D. Y. Patil Vidyapeeth, Pimpri, Pune, Maharashtra, India"},{"name":"Department of Surgery, Medicine, Dentistry and Morphological Sciences with Interest in Transplant, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"194","published-online":{"date-parts":[[2026,6,17]]},"reference":[{"issue":"04","key":"ref1","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1111\/cid.12791","article-title":"Morphology and severity of peri-implantitis bone defects","volume":"21","author":"A Monje","year":"2019","journal-title":"Clin Implant Dent Relat Res"},{"issue":"03","key":"ref2","doi-asserted-by":"crossref","first-page":"233","DOI":"10.1016\/j.jpor.2017.03.001","article-title":"Microbial colonization at the implant-abutment interface and its possible influence on periimplantitis: a systematic review and meta-analysis","volume":"61","author":"M Tallarico","year":"2017","journal-title":"J Prosthodont Res"},{"issue":"04","key":"ref3","doi-asserted-by":"crossref","first-page":"417","DOI":"10.1111\/clr.12215","article-title":"Impact of implant-abutment connection and positioning of the machined collar\/microgap on crestal bone level changes: a systematic review","volume":"25","author":"F Schwarz","year":"2014","journal-title":"Clin Oral Implants Res"},{"issue":"12","key":"ref4","doi-asserted-by":"crossref","first-page":"1574","DOI":"10.1111\/jcpe.14079","article-title":"Risk of late implant loss and peri-implantitis based on dental implant surfaces and abutment types: a nationwide cohort study in the elderly","volume":"51","author":"S Y Lee","year":"2024","journal-title":"J Clin Periodontol"},{"issue":"S 20","key":"ref5","first-page":"S246","article-title":"Peri-implantitis","volume":"45","author":"F Schwarz","year":"2018","journal-title":"J Clin Periodontol"},{"issue":"05","key":"ref6","doi-asserted-by":"crossref","first-page":"656","DOI":"10.1097\/ID.0000000000000465","article-title":"Implant\u2013abutment contact surfaces and microgap measurements of different implant connections under 3-dimensional X-ray microtomography","volume":"25","author":"A Scarano","year":"2016","journal-title":"Implant Dent"},{"issue":"03","key":"ref7","doi-asserted-by":"crossref","first-page":"158","DOI":"10.1034\/j.1600-0501.1993.040307.x","article-title":"Bacterial colonization of the internal part of two-stage implants. 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