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A comparison between 4 and 6 implants in the maxillary posterior region to support an overdenture; 1‐year results from a randomized controlled trial

Identifieur interne : 004E69 ( Istex/Corpus ); précédent : 004E68; suivant : 004E70

A comparison between 4 and 6 implants in the maxillary posterior region to support an overdenture; 1‐year results from a randomized controlled trial

Auteurs : Wim Slot ; Gerry M. Raghoebar ; Arjan Vissink ; Henny J. A. Meijer

Source :

RBID : ISTEX:9D26309F84640248C2EB4145BCE657E11D9F5325

Abstract

To compare the treatment outcome of 4 vs. 6 bar‐connected implants in the posterior region of the maxilla to support an overdenture during a 1‐year follow‐up period.

Url:
DOI: 10.1111/clr.12118

Links to Exploration step

ISTEX:9D26309F84640248C2EB4145BCE657E11D9F5325

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Objective
<p>To compare the treatment outcome of 4 vs. 6 bar‐connected implants in the posterior region of the maxilla to support an overdenture during a 1‐year follow‐up period.</p>
Materials and methods
<p>Sixty‐six edentulous patients with an insufficient amount of bone volume in the maxilla to place implants were asked to participate in this study. Randomization assigned patients to either 4 or 6 implants. In all patients, a maxillary sinus floor elevation procedure with bone from the iliac crest was performed, and after a 3‐month healing period, 4 or 6 dental implants were inserted in the maxillary posterior region in a one‐stage procedure. After 3 months of osseointegration, a bar‐supported overdenture was constructed. Implant survival, overdenture survival, clinical scores, peri‐implant bone height changes and patients' satisfaction were assessed. Study analysis was performed according a non‐inferiority design.</p>
Results
<p>All patients completed the one‐year follow‐up. After a functional period of 1‐year, implant survival was 100% in the 4 implants group and 99.5% in the 6 implants group. Overdenture survival was 100% in both groups. Mean clinical scores were very low and did not significantly differ between groups. Mean marginal bone resorption was 0.35 ± 0.31 mm and 0.46 ± 0.34 mm in the 4 and 6 implants group, respectively. Patients' satisfaction improved significantly in both groups, but did not differ between groups.</p>
Conclusion
<p>A bar‐supported overdenture on 4 implants in the posterior maxillary region is not inferior to an overdenture supported by 6 bar‐connected dental implants.</p>
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<keyword xml:id="clr12118-kwd-0003">dental implants</keyword>
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CONSORT Statement 2001 Checklist. </caption>
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<p>Sixty‐six edentulous patients with an insufficient amount of bone volume in the maxilla to place implants were asked to participate in this study. Randomization assigned patients to either 4 or 6 implants. In all patients, a maxillary sinus floor elevation procedure with bone from the iliac crest was performed, and after a 3‐month healing period, 4 or 6 dental implants were inserted in the maxillary posterior region in a one‐stage procedure. After 3 months of osseointegration, a bar‐supported overdenture was constructed. Implant survival, overdenture survival, clinical scores, peri‐implant bone height changes and patients' satisfaction were assessed. Study analysis was performed according a non‐inferiority design.</p>
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<p>All patients completed the one‐year follow‐up. After a functional period of 1‐year, implant survival was 100% in the 4 implants group and 99.5% in the 6 implants group. Overdenture survival was 100% in both groups. Mean clinical scores were very low and did not significantly differ between groups. Mean marginal bone resorption was 0.35 ± 0.31 mm and 0.46 ± 0.34 mm in the 4 and 6 implants group, respectively. Patients' satisfaction improved significantly in both groups, but did not differ between groups.</p>
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<p>A bar‐supported overdenture on 4 implants in the posterior maxillary region is not inferior to an overdenture supported by 6 bar‐connected dental implants.</p>
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<abstract>All patients completed the one‐year follow‐up. After a functional period of 1‐year, implant survival was 100% in the 4 implants group and 99.5% in the 6 implants group. Overdenture survival was 100% in both groups. Mean clinical scores were very low and did not significantly differ between groups. Mean marginal bone resorption was 0.35 ± 0.31 mm and 0.46 ± 0.34 mm in the 4 and 6 implants group, respectively. Patients' satisfaction improved significantly in both groups, but did not differ between groups.</abstract>
<abstract>A bar‐supported overdenture on 4 implants in the posterior maxillary region is not inferior to an overdenture supported by 6 bar‐connected dental implants.</abstract>
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