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Bone dimensional variations at implants placed in fresh extraction sockets: a multilevel multivariate analysis
Author(s) -
Tomasi Cristiano,
Sanz Mariano,
Cecchinato Denis,
Pjetursson Bjarni,
Ferrus Jorge,
Lang Niklaus P.,
Lindhe Jan
Publication year - 2010
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/j.1600-0501.2009.01848.x
Subject(s) - crest , implant , alveolar crest , buccal administration , dentistry , ridge , orthodontics , materials science , medicine , dental alveolus , geology , surgery , optics , physics , paleontology
Aim: To use multilevel, multivariate models to analyze factors that may affect bone alterations during healing after an implant immediately placed into an extraction socket. Material and methods: Data included in the current analysis were obtained from a clinical trial in which a series of measurements were performed to characterize the extraction site immediately after implant installation and at re‐entry 4 months later. A regression multilevel, multivariate model was built to analyze factors affecting the following variables: (i) the distance between the implant surface and the outer bony crest (S‐OC), (ii) the horizontal residual gap (S‐IC), (iii) the vertical residual gap (R‐D) and (iv) the vertical position of the bone crest opposite the implant (R‐C). Results: It was demonstrated that (i) the S‐OC change was significantly affected by the thickness of the bone crest; (ii) the size of the residual gap was dependent of the size of the initial gap and the thickness of the bone crest; and (iii) the reduction of the buccal vertical gap was dependent on the age of the subject. Moreover, the position of the implant opposite the alveolar crest of the buccal ridge and its bucco‐lingual implant position influenced the amount of buccal crest resorption. Conclusions: Clinicians must consider the thickness of the buccal bony wall in the extraction site and the vertical as well as the horizontal positioning of the implant in the socket, because these factors will influence hard tissue changes during healing. To cite this article:
Tomasi C, Sanz M, Cecchinato D, Pjetursson B, Ferrus J, Lang NP, Lindhe J. Bone dimensional variations at implants placed in fresh extraction sockets: a multilevel multivariate analysis.
Clin. Oral Impl. Res . 21 , 2010; 30–36.