{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,3]],"date-time":"2025-10-03T18:08:36Z","timestamp":1759514916968},"reference-count":22,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2010,11,10]],"date-time":"2010-11-10T00:00:00Z","timestamp":1289347200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Clinical Oral Implants Res"],"published-print":{"date-parts":[[2010,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p><jats:bold>Purpose: <\/jats:bold> The aim of this retrospective study was to compare the frequency of spontaneous early exposure of cover screws and marginal bone resorption in conventionally and early\u2010placed submerged implants before second\u2010stage surgery.<\/jats:p><jats:p><jats:bold>Materials and methods: <\/jats:bold> A total of 103 Nobel Biocare Branemark implants were conventionally (Group 1), or early\u2010placed (Group 2) in 46 consecutive patients following the two\u2010stage surgical protocol. Patients in both groups received oral hygiene training in self\u2010performed plaque control measures, including exposure of cover screws during healing. Spontaneous cover screw exposure (CSE) of each implant was recorded for both groups and scored from Class 0 (no perforation) to Class 4 (complete exposure). Plaque index scores were recorded and marginal bone\u2010level (MBL) changes were measured in radiographs before second\u2010stage surgery in a blind manner.<\/jats:p><jats:p><jats:bold>Results: <\/jats:bold> MBL in Group 2 was higher than Group 1 in patients with or without interim prosthesis (<jats:italic>P<\/jats:italic>&lt;0.05). The use of interim prosthesis did not increase MBL in Group 1, but led to higher MBL in Group 2. The percentage of non\u2010exposed implants in Group 1 was higher than Group 2 (<jats:italic>P<\/jats:italic>=0.007, odds ratio=7). Group 1 implants had 11.5 times greater plaque index score 0 than those in Group 2 (<jats:italic>P<\/jats:italic>=0.031, odds ratio=11.5). The differences between MBL with regard to CSE scores 0 and 1\u20134 was significant for both sides in Group 2 and the mesial side in Group 1 (<jats:italic>P<\/jats:italic>&lt;0.05). The difference between MBL with regard to plaque index scores 1\u20133 was similar in both groups (<jats:italic>P<\/jats:italic>&gt;0.05).<\/jats:p><jats:p><jats:bold>Conclusions: <\/jats:bold> There is a direct relation between spontaneous early cover screw perforations with early crestal bone loss. Early\u2010placed implants experienced more spontaneous perforations and associated bone loss in comparison with conventionally placed submerged implants. The use of interim dentures may lead to more CSE and consequent MBL in the early\u2010placement protocol.<\/jats:p><jats:p> <jats:bold>To cite this article:<\/jats:bold>\n          \u2028\u00c7ehreli MC, K\u00f6kat AM, Uysal S, Akca K. Spontaneous early exposure and marginal bone loss around conventionally and early\u2010placed submerged implants: a double\u2010blind study.\u2028<jats:italic>Clin. Oral Impl. Res<\/jats:italic>. <jats:bold>21<\/jats:bold>, 2010; 1327\u20131333.\u2028doi: 10.1111\/j.1600\u20100501.2009.01952.x<\/jats:p>","DOI":"10.1111\/j.1600-0501.2010.01952.x","type":"journal-article","created":{"date-parts":[[2010,7,8]],"date-time":"2010-07-08T02:19:42Z","timestamp":1278555582000},"page":"1327-1333","source":"Crossref","is-referenced-by-count":8,"title":["Spontaneous early exposure and marginal bone loss around conventionally and early\u2010placed submerged implants: a double\u2010blind study"],"prefix":"10.1111","volume":"21","author":[{"given":"Murat Cavit","family":"\u00c7ehreli","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ali Murat","family":"K\u00f6kat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Serdar","family":"Uysal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kivanc","family":"Akca","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,11,10]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.1997.tb00230.x"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.1996.070303.x"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0300-9785(81)80077-4"},{"key":"e_1_2_6_5_1","first-page":"111","article-title":"New classification of physical status","volume":"234","author":"American Society of Anesthesiologists","year":"1998","journal-title":"Anesthesiology"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1097\/00008505-200204000-00018"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.1034\/j.1600-0501.2003.00972.x"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1600-051X.1996.tb00520.x"},{"key":"e_1_2_6_9_1","first-page":"1","article-title":"Osseointegrated implants in the treatment of the edentulous jaw. 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