{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T20:39:39Z","timestamp":1783456779498,"version":"3.55.0"},"reference-count":50,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2014,2,1]],"date-time":"2014-02-01T00:00:00Z","timestamp":1391212800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000093","name":"Center for Information Technology","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000093","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2014,2]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> The purpose of this study is to analyze the tension distribution on bone tissue around implants with different angulations (0\u00b0, 17\u00b0, and 30\u00b0) and connections (external hexagon and tapered) through the use of three\u2010dimensional finite element and statistical analyses.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Twelve different configurations of three\u2010dimensional finite element models, including three inclinations of the implants (0\u00b0, 17\u00b0, and 30\u00b0), two connections (an external hexagon and a tapered), and two load applications (axial and oblique), were simulated. The maximum principal stress values for cortical bone were measured at the mesial, distal, buccal, and lingual regions around the implant for each analyzed situation, totaling 48 groups. Loads of 200 and 100 N were applied at the occlusal surface in the axial and oblique directions, respectively. Maximum principal stress values were measured at the bone crest and statistically analyzed using analysis of variance. Stress patterns in the bone tissue around the implant were analyzed qualitatively.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The results demonstrated that under the oblique loading process, the external hexagon connection showed significantly higher stress concentrations in the bone tissue (<jats:italic>P<\/jats:italic> &lt;0.05) compared with the tapered connection. Moreover, the buccal and mesial regions of the cortical bone concentrated significantly higher stress (<jats:italic>P<\/jats:italic> &lt;0.005) to the external hexagon implant type. Under the oblique loading direction, the increased external hexagon implant angulation induced a significantly higher stress concentration (<jats:italic>P<\/jats:italic> = 0.045).<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> The study results show that: 1) the oblique load was more damaging to bone tissue, mainly when associated with external hexagon implants; and 2) there was a higher stress concentration on the buccal region in comparison to all other regions under oblique load.<\/jats:p>","DOI":"10.1902\/jop.2013.120713","type":"journal-article","created":{"date-parts":[[2013,5,20]],"date-time":"2013-05-20T11:59:19Z","timestamp":1369051159000},"page":"261-269","source":"Crossref","is-referenced-by-count":54,"title":["Influence of Tapered and External Hexagon Connections on Bone Stresses Around Tilted Dental Implants: Three\u2010Dimensional Finite Element Method With Statistical Analysis"],"prefix":"10.1002","volume":"85","author":[{"given":"Daniel Augusto","family":"de Faria Almeida","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eduardo Piza","family":"Pellizzer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fellippo Ramos","family":"Verri","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"suffix":"Jr.","given":"Joel Ferreira","family":"Santiago","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paulo S\u00e9gio Perri","family":"de Carvalho","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2014,2]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"52","article-title":"Three\u2010year evaluation of Br\u00e5nemark implants connected to angulated abutments","volume":"12","author":"Balshi TJ","year":"1997","journal-title":"Int J Oral Maxillofac Implants"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1177\/0022034511425675"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2003.tb00010.x"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2008.10.008"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2005.tb00069.x"},{"key":"e_1_2_7_7_1","first-page":"405","article-title":"Tilting of posterior mandibular and maxillary implants for improved prosthesis support","volume":"15","author":"Krekmanov L","year":"2000","journal-title":"Int J Oral Maxillofac Implants"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2006.11.023"},{"key":"e_1_2_7_9_1","first-page":"421","article-title":"A comparison of implant\/prosthesis loading with four clinical variables","volume":"8","author":"Weinberg LA","year":"1995","journal-title":"Int J Prosthodont"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0300-5712(02)00065-9"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1067\/mpr.2001.115251"},{"key":"e_1_2_7_12_1","first-page":"241","article-title":"Forces and moments on Branemark implants","volume":"4","author":"Rangert B","year":"1989","journal-title":"Int J Oral Maxillofac Implants"},{"key":"e_1_2_7_13_1","first-page":"326","article-title":"Bending overload and implant fracture: A retrospective clinical analysis","volume":"10","author":"Rangert B","year":"1995","journal-title":"Int J Oral Maxillofac Implants"},{"key":"e_1_2_7_14_1","first-page":"776","article-title":"Tilted or parallel implant placement in the completely edentulous mandible? 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