{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,27]],"date-time":"2026-02-27T04:19:04Z","timestamp":1772165944821,"version":"3.50.1"},"reference-count":33,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2020,11,19]],"date-time":"2020-11-19T00:00:00Z","timestamp":1605744000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2020,11,19]],"date-time":"2020-11-19T00:00:00Z","timestamp":1605744000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["BMC Oral Health"],"published-print":{"date-parts":[[2020,12]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Peri-implantitis is a biological complication that affects soft and hard tissues around dental implants. Implantoplasty (IP) polishes the exposed implant surface, to decontaminate it and make it less prone to bacterial colonization. This study investigates whether a higher clinical crown-to-implant-ratio (CIR) reduces implant fracture resistance and whether implants are more fracture-prone after IP in the presence of 50% of bone loss.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Forty-eight narrow platform (3.5\u00a0mm) 15\u00a0mm long titanium dental implants with a rough surface and hexagonal external connection were placed in standardized bone-like resin casts leaving 7.5\u00a0mm exposed. Half were selected for IP. The IP and control groups were each divided into 3 subgroups with different clinical CIRs (2:1, 2.5:1 and 3:1). The implant wall width measurements were calculated using the software ImageJ v.1.51 through the analysis of plain x-ray examination of all the samples using standardized mounts. A fracture test was performed and scanning electron microscopy was used to evaluate maximum compression force (F\n                      <jats:sub>max<\/jats:sub>\n                      ) and implant fractures.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      IP significantly reduced the implant wall width (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.001) in all reference points of each subgroup. F\n                      <jats:sub>max<\/jats:sub>\n                      was significantly higher in the 2:1 subgroup (control\u2009=\u20091276.16\u00a0N\u2009\u00b1\u2009169.75; IP\u2009=\u20091211.70\u00a0N\u2009\u00b1\u2009281.64) compared with the 2.5:1 (control\u2009=\u2009815.22\u00a0N\u2009\u00b1\u2009185.58,\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.001; IP\u2009=\u2009621.68\u00a0N\u2009\u00b1\u2009186.28,\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.001) and the 3:1 subgroup (control\u2009=\u2009606.55\u00a0N\u2009\u00b1\u2009111.48,\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.001; IP\u2009=\u2009465.95\u00a0N\u2009\u00b1\u200968.57,\n                      <jats:italic>P<\/jats:italic>\n                      \u2009&lt;\u20090.001). Only the 2.5:1 subgroup showed a significant reduction (\n                      <jats:italic>P<\/jats:italic>\n                      \u2009=\u20090.037) of the F\n                      <jats:sub>max<\/jats:sub>\n                      between the controls and the IP implants. Most fractures were located in the platform area. Only 5 implants with IP of the 2:1 CIR subgroup had a different fracture location (4 fractures in the implant body and 1 in the prosthetic screw).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>IP significantly reduces the fracture resistance of implants with a 2.5:1 CIR. The results also suggest that the CIR seems to be a more relevant variable when considering the resistance to fracture of implants, since significant reductions were observed when unfavorable CIR subgroups (2.5:1 and 3:1 CIR) were compared with the 2:1 CIR samples.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12903-020-01323-z","type":"journal-article","created":{"date-parts":[[2020,11,19]],"date-time":"2020-11-19T17:56:29Z","timestamp":1605808589000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Effect of crown to implant ratio and implantoplasty on the fracture resistance of narrow dental implants with marginal bone loss: an in vitro study"],"prefix":"10.1186","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6307-5585","authenticated-orcid":false,"given":"Bruno","family":"Leit\u00e3o-Almeida","sequence":"first","affiliation":[]},{"given":"Octavi","family":"Camps-Font","sequence":"additional","affiliation":[]},{"given":"Andr\u00e9","family":"Correia","sequence":"additional","affiliation":[]},{"given":"Javier","family":"Mir-Mari","sequence":"additional","affiliation":[]},{"given":"Rui","family":"Figueiredo","sequence":"additional","affiliation":[]},{"given":"Eduard","family":"Valmaseda-Castell\u00f3n","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2020,11,19]]},"reference":[{"key":"1323_CR1","first-page":"1","volume":"7","author":"A Ramanauskaite","year":"2016","unstructured":"Ramanauskaite A, Daugela P, de Almeida RF, et al. 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The authors would like to declare the following interests outside the work presented: BLA reports personal fees (sponsored lectures) and non-financial support from Megagen (Daegu, South Korea) outside the submitted work. RF reports personal fees (sponsored lectures) from Inibsa Dental (Lli\u00e7a de Vall, Spain). In addition, he has participated as a sub-investigator in a randomized clinical trial sponsored by Mundipharma (Cambridge, UK) and another clinical trial for Menarini Ricerche (Florence, Italy). AC reports personal fees (sponsored lectures) from Straumann (Basel, Switzerland). JMM reports no conflicts of interest. OCF reports grants, personal fees (sponsored lectures) and non-financial support from MozoGrau (Valladolid, Spain), and personal fees (sponsored lectures) from BioHorizons Ib\u00e9rica (Madrid, Spain), Inibsa Dental (Lli\u00e7a de Vall, Spain), Dentsply implants Iberia (Barcelona, Spain) and Araguaney Dental (Barcelona, Spain) outside the submitted work. He has also participated as a principal investigator in a randomized clinical trial sponsored by Mundipharma (Cambridge, UK) and in another clinical trial as a sub-investigator for Menarini Ricerche (Florence, Italy). EVC reports personal fees (sponsored lectures) and non-financial support from MozoGrau (Valladolid, Spain), and personal fees (sponsored lectures) from BioHorizons Ib\u00e9rica (Madrid, Spain), Inibsa Dental (Lli\u00e7a de Vall, Spain) and Dentsply implants Iberia (Barcelona, Spain) outside the submitted work. In addition, he has participated as a sub-investigator in a randomized clinical trial sponsored by Mundipharma (Cambridge, UK).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"329"}}