title: Prognosis of implant longevity in terms of annual bone loss: a methodological finite element study.
abstract: Dental implant failure is mainly the consequence of bone loss at peri-implant area. It usually begins in crestal bone. Due to this gradual loss, implants cannot withstand functional force without bone overload, which promotes complementary loss. As a result, implant lifetime is significantly decreased. To estimate implant success prognosis, taking into account 0.2 mm annual bone loss for successful implantation, ultimate occlusal forces for the range of commercial cylindrical implants were determined and changes of the force value for each implant due to gradual bone loss were studied. For this purpose, finite element method was applied and von Mises stresses in implant-bone interface under 118.2 N functional occlusal load were calculated. Geometrical models of mandible segment, which corresponded to Type II bone (Lekholm & Zarb classification), were generated from computed tomography images. The models were analyzed both for completely and partially osseointegrated implants (bone loss simulation). The ultimate value of occlusal load, which generated 100 MPa von Mises stresses in the critical point of adjacent bone, was calculated for each implant. To estimate longevity of implants, ultimate occlusal loads were correlated with an experimentally measured 275 N occlusal load (Mericske-Stern & Zarb). These findings generally provide prediction of dental implants success.
authors.affiliation: a Department of Aircraft Strength , National Aerospace University , Kharkiv , Ukraine.
authors.forename: Vladyslav
authors.initials: V
authors.lastname: Demenko
authors.affiliation: b Department of Oral and Maxillofacial Surgery , 1st Faculty of Medicine, Charles University in Prague , Prague , Czech Republic.
authors.forename: Igor
authors.initials: I
authors.lastname: Linetskiy
authors.affiliation: d Department of Rehabilitation Medicine , National Academy of Postgraduate Medical Education , Balakyreva 5, Kharkiv , Ukraine.
authors.forename: Larysa
authors.initials: L
authors.lastname: Linetska
authors.affiliation: c Department of Aircraft Design , National Aerospace University , Kharkiv , Ukraine.
authors.forename: Vitalij
authors.initials: V
authors.lastname: Nesvit
authors.affiliation: a Department of Aircraft Strength , National Aerospace University , Kharkiv , Ukraine.
authors.forename: Andrii
authors.initials: A
authors.lastname: Shevchenko
authors.affiliation: a Department of Aircraft Strength , National Aerospace University , Kharkiv , Ukraine.
authors.forename: Oleg
authors.initials: O
authors.lastname: Yefremov
authors.affiliation: e Igel , Germany.
authors.forename: Hans-Werner
authors.initials: HW
authors.lastname: Weisskircher
mesh_terms: D001732:Bite Force; D015921:Dental Implants; D017267:Dental Prosthesis Design; D003799:Dental Stress Analysis; D020342:Finite Element Analysis; D006801:Humans; D021621:Imaging, Three-Dimensional; D008334:Mandible / Q000473:pathology*; D016348:Osseointegration; D013314:Stress, Mechanical; D013997:Time Factors; D016474:Weight-Bearing
chemical_list: D015921:Dental Implants
keywords: bone loss; implant dentistry; osseointegration, finite element