Delayed versus Immediate Loading of Implants: Survival Analysis and Risk Factors for Dental Implant Failure
Identifieur interne : 006047 ( Main/Exploration ); précédent : 006046; suivant : 006048Delayed versus Immediate Loading of Implants: Survival Analysis and Risk Factors for Dental Implant Failure
Auteurs : Srinivas M. Susarla ; Sung-Kiang Chuang ; Thomas B. DodsonSource :
- Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons [ 0278-2391 ] ; 2008.
Abstract
The purpose of this study was to estimate one-year implant survival for delayed versus immediately loaded implants and identify risk factors for implant failure.
This was a retrospective cohort study, consisting of a sample of subjects who had ≥ 1 Bicon® dental implant placed over a 13-year period. The primary predictor variable was method of implant loading: delayed (3 – 6 months after placement) or immediately after insertion. Secondary predictor variables were classified as demographic, anatomic, implant/abutment and reconstructive. The outcome variable was implant failure, defined as removal of the implant and was recorded as months of survival. Descriptive, Kaplan-Meier, and univariate Cox proportional hazards statistics were computed. Univariate associations with p ≤ 0.15 and biologically relevant variables (e.g. age, gender) were included in a marginal multiple Cox regression model. In the multiple model, a p-value ≤ 0.05 was considered statistically significant.
The study sample consisted of 677 subjects who had 2349 delayed loaded dental implants and 178 patients who had 477 immediate loaded implants. The unadjusted one-year survival estimates for the delayed and immediate loading groups were 95.5% and 90.3%, respectively (p < 0.01). In the marginal multiple Cox regression model, immediate loading, current tobacco use, maxillary implants, and shorter implants were associated with failure (p ≤ 0.05).
In this study, immediately loaded implants were 2.7 times (after adjusting) more likely to fail at one-year compared to delayed loaded implants.
Url:
DOI: 10.1016/j.joms.2007.09.012
PubMed: 18201604
PubMed Central: 5560427
Affiliations:
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Dodson</name></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">18201604</idno><idno type="pmc">5560427</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5560427</idno><idno type="RBID">PMC:5560427</idno><idno type="doi">10.1016/j.joms.2007.09.012</idno><date when="2008">2008</date><idno type="wicri:Area/Pmc/Corpus">002720</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">002720</idno><idno type="wicri:Area/Pmc/Curation">002720</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Curation">002720</idno><idno type="wicri:Area/Pmc/Checkpoint">002647</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Checkpoint">002647</idno><idno type="wicri:Area/Ncbi/Merge">002019</idno><idno type="wicri:Area/Ncbi/Curation">002019</idno><idno type="wicri:Area/Ncbi/Checkpoint">002019</idno><idno type="wicri:doubleKey">0278-2391:2008:Susarla S:delayed:versus:immediate</idno><idno type="wicri:Area/Main/Merge">006125</idno><idno type="wicri:Area/Main/Curation">006047</idno><idno type="wicri:Area/Main/Exploration">006047</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Delayed versus Immediate Loading of Implants: Survival Analysis and Risk Factors for Dental Implant Failure</title><author><name sortKey="Susarla, Srinivas M" sort="Susarla, Srinivas M" uniqKey="Susarla S" first="Srinivas M." last="Susarla">Srinivas M. Susarla</name></author><author><name sortKey="Chuang, Sung Kiang" sort="Chuang, Sung Kiang" uniqKey="Chuang S" first="Sung-Kiang" last="Chuang">Sung-Kiang Chuang</name></author><author><name sortKey="Dodson, Thomas B" sort="Dodson, Thomas B" uniqKey="Dodson T" first="Thomas B." last="Dodson">Thomas B. Dodson</name></author></analytic><series><title level="j">Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons</title><idno type="ISSN">0278-2391</idno><idno type="eISSN">1531-5053</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec id="S1"><title>Purpose</title><p id="P2">The purpose of this study was to estimate one-year implant survival for delayed versus immediately loaded implants and identify risk factors for implant failure.</p></sec><sec id="S2"><title>Materials and Methods</title><p id="P3">This was a retrospective cohort study, consisting of a sample of subjects who had ≥ 1 Bicon® dental implant placed over a 13-year period. The primary predictor variable was method of implant loading: delayed (3 – 6 months after placement) or immediately after insertion. Secondary predictor variables were classified as demographic, anatomic, implant/abutment and reconstructive. The outcome variable was implant failure, defined as removal of the implant and was recorded as months of survival. Descriptive, Kaplan-Meier, and univariate Cox proportional hazards statistics were computed. Univariate associations with p ≤ 0.15 and biologically relevant variables (e.g. age, gender) were included in a marginal multiple Cox regression model. In the multiple model, a p-value ≤ 0.05 was considered statistically significant.</p></sec><sec id="S3"><title>Results</title><p id="P4">The study sample consisted of 677 subjects who had 2349 delayed loaded dental implants and 178 patients who had 477 immediate loaded implants. The unadjusted one-year survival estimates for the delayed and immediate loading groups were 95.5% and 90.3%, respectively (p < 0.01). In the marginal multiple Cox regression model, immediate loading, current tobacco use, maxillary implants, and shorter implants were associated with failure (p ≤ 0.05).</p></sec><sec id="S4"><title>Conclusion</title><p id="P5">In this study, immediately loaded implants were 2.7 times (after adjusting) more likely to fail at one-year compared to delayed loaded implants.</p></sec></div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Chuang, Sung Kiang" sort="Chuang, Sung Kiang" uniqKey="Chuang S" first="Sung-Kiang" last="Chuang">Sung-Kiang Chuang</name><name sortKey="Dodson, Thomas B" sort="Dodson, Thomas B" uniqKey="Dodson T" first="Thomas B." last="Dodson">Thomas B. Dodson</name><name sortKey="Susarla, Srinivas M" sort="Susarla, Srinivas M" uniqKey="Susarla S" first="Srinivas M." last="Susarla">Srinivas M. 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