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The purpose of this study is to investigate the effect of the implant\u2019s vertical position and the soft tissue\u2019s thickness on the rate of marginal bone loss of the dental implant.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and methods<\/jats:title>\n                    <jats:p>In this single-blind randomized clinical trial study, 56 implants placed in the posterior region of mandible of 33 patients (19 women, 14 men) were divided into two groups. The group of crestal (28 implants) and subcrestal (28 implants) implants, each group was divided into two sub-groups with soft tissue thickness of 2\u00a0mm and less than 2\u00a0mm (14 implants) and more than 2\u00a0mm (14 implants). The amount of marginal bone loss was measured by Scanora 5.2 program with radiographs Digital parallelism based on the effect of the vertical position of the implant, soft tissue thickness, three months after placement, and three months after loading implants (six months after implant placement).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The results showed that marginal bone loss in subcrestal implants is significantly more than crestal implants (p-value\u2009=\u20090.001), and also marginal bone loss in the soft tissue thickness group of 2\u00a0mm and less is significantly more than the group of soft tissue thickness more than 2\u00a0mm (p-value\u2009&lt;\u20090.001). The amount of marginal bone loss three months after implant loading was significantly higher than three months after implant placement (p-value\u2009&lt;\u20090.001).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The implant\u2019s vertical position and the soft tissue\u2019s thickness around the implant are effective factors in the amount of marginal bone loss. Marginal bone loss is more in subcrestal implants and in cases with less soft tissue thickness. The time factor significantly affects the amount of marginal bone loss.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Trial registration<\/jats:title>\n                    <jats:p>this clinical trial was registered at Iranian Registry of Clinical Trials, registration number IRCT20120215009014N415, registration date 20,220,110, (https\/\/en.irct.ir\/trial\/60,991)<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12903-024-04480-7","type":"journal-article","created":{"date-parts":[[2024,6,24]],"date-time":"2024-06-24T15:01:24Z","timestamp":1719241284000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Effect of vertical implant position on marginal bone loss: a randomized clinical trial"],"prefix":"10.1186","volume":"24","author":[{"given":"Morad","family":"Hedayatipanah","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hadi Kokabi","family":"Arasteh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abbas","family":"Shokri","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Behnaz","family":"Alafchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leila Shahsavand","family":"Baghdadi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,6,24]]},"reference":[{"issue":"3","key":"4480_CR1","first-page":"105","volume":"4","author":"R Rajput","year":"2016","unstructured":"Rajput R, Chouhan Z, Sindhu M, Sundararajan S, Chouhan RRS. 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