CT-based dentulous mandibular alveolar ridge measurements as predictors of crown-to-implant ratio for short and extra short dental implants.
Sivolella S; Department of Neurosciences, Dentistry Section, University of Padova, Via Giustiniani, 1, 35131, Padua, Italy. .
Meggiorin S; Department of Neurosciences, Dentistry Section, University of Padova, Via Giustiniani, 1, 35131, Padua, Italy.
Ferrarese N; Department of Neurosciences, Dentistry Section, University of Padova, Via Giustiniani, 1, 35131, Padua, Italy.
Lupi A; Department of Medicine-DIMED, Institute of Radiology, University Hospital of Padova, Padua, Italy.
Cavallin F; Solagna, Italy.
Fiorino A; Cellular and Molecular Clinical Research, Dentistry Unit of Head and Neck Clinical Area, School of Dentistry, Catholic University of Sacred Heart, Rome, Italy.
Giraudo C; Department of Medicine-DIMED, Institute of Radiology, University Hospital of Padova, Padua, Italy.
Scientific reports [Sci Rep] 2020 Oct 01; Vol. 10 (1), pp. 16229. Date of Electronic Publication: 2020 Oct 01.
Typ publikacji :
Journal Article; Research Support, Non-U.S. Gov't
Imprint Name(s) :
Original Publication: London : Nature Publishing Group, copyright 2011-
MeSH Terms :
Alveolar Process/*diagnostic imaging
Tooth Crown/*diagnostic imaging
Adolescent ; Adult ; Alveolar Process/anatomy & histology ; Humans ; Jaw, Edentulous/diagnostic imaging ; Jaw, Edentulous/pathology ; Male ; Mandible/anatomy & histology ; Radiography, Dental ; Retrospective Studies ; Tomography, X-Ray Computed ; Tooth Crown/anatomy & histology ; Young Adult
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Substance Nomenclature :
0 (Dental Implants)
Entry Date(s) :
Date Created: 20201002 Date Completed: 20201230 Latest Revision: 20210327
Update Code :
PubMed Central ID :
The purpose was to predict the crown-to-implant ratio variation in the edentulous posterior mandibles rehabilitated with short dental implants. Hence, vertical and horizontal dimensions of dentulous posterior mandibles in a sample of 18- to 25-year-olds were measured, and correlations of these dimensions with sex and site were investigated. Mandibular computed tomography scans from 100 subjects were considered. Vertical and horizontal bone and tooth measurements were taken at the sites of the second premolar (PM), and the mesial and distal roots of the first and second molars (M1m, M1d, M2m and M2d, respectively). A hypothetical crown-to-implant ratio (C/I R) was calculated assuming the insertion of short and extra short implants (5, 6 or 7 mm), at 1.5 mm from the inferior alveolar canal, maintaining the position of the existing occlusal plane. All vertical bone dimensions decreased from the PM to the M2d. Width measurements increased from the mesial (PM) to the distal sites (M1m, M1d, M2m and M2d). Males had significantly greater vertical and horizontal measurements than females at all sites. The mean C/I R was higher than 2 for all sizes of implant. The C/I R was lower for the second molar than for the second premolar, while it was similar for the first molar and the second premolar. Males had a higher C/I R than females. Computed tomography can be used to study the anatomical features of alveolar bone, and to predict some clinical aspects of prosthetic rehabilitation with implants, such as the crown-to-implant ratio in conditions of serious bone atrophy.
Erratum in: Sci Rep. 2021 Mar 26;11(1):7370. (PMID: 33772097)
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