title: Selection of the implant transgingival height for optimal biomechanical properties: a three-dimensional finite element analysis.
abstract: We evaluated the effects of the transgingival height of an implant on the maximum equivalent stress in jaw bones and the maximum displacement in implant-abutment complex by a finite element method. The transgingival height ranged from 1.0-4.0 mm. Under axial load, the maximum equivalent stress in the cortical bone could be reduced by up to 4.7%, and under a buccolingual load, the maximum equivalent stresses in the cortical and the cancellous bones could be reduced by 17.3% and 18.5%, respectively. The maximum displacement of the implant-abutment complex could be reduced by 4.1% and 48.9% under axial and buccolingual loads, respectively. When the transgingival height was in the range of 1.7-2.8 mm, there was minimum stress in the jaw bones and minimum displacement in the implant-abutment complex. Data indicated that transgingival height played a more important part in protecting a dental implant under a buccolingual load than under an axial load; and transgingival heights ranging from 1.7-2.8 mm were biomechanically optimal for a screwed implant.
authors.affiliation: Department of Oral and Maxillofacial Surgery, School of Stomatology, the Fourth Military Medical University, Xi'an, Shanxi, PR China.
authors.forename: Yingying
authors.initials: Y
authors.lastname: Sun
authors.forename: Liang
authors.initials: L
authors.lastname: Kong
authors.forename: Kaijin
authors.initials: K
authors.lastname: Hu
authors.forename: Cheng
authors.initials: C
authors.lastname: Xie
authors.forename: Hongzhi
authors.initials: H
authors.lastname: Zhou
authors.forename: Yanpu
authors.initials: Y
authors.lastname: Liu
authors.forename: Baolin
authors.initials: B
authors.lastname: Liu
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D055119:Elastic Modulus; D020342:Finite Element Analysis; D005881:Gingiva / Q000473:pathology*; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008334:Mandible / Q000503:physiopathology*; D008422:Materials Testing; D008954:Models, Biological; D016348:Osseointegration / Q000502:physiology; D013314:Stress, Mechanical; D014025:Titanium / Q000737:chemistry
chemical_list: D015921:Dental Implants; D003764:Dental Materials; D003776:Dental Porcelain; D014025:Titanium