TODENTJ-25-03-2019_TODENTJ-10-680 1553506889 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 12 09 2016 10 1 Jakob Zwaan Leonardo Vanden Bogaerde Herman Sahlin Lars Sennerby Purpose: To study the clinical/radiographic outcomes and stability of a tapered implant design with a hydrophilic surface when placed in the maxilla using various protocols and followed for one year. Methods: Ninety-seven consecutive patients treated as part of daily routine in two clinics with 163 tapered implants in healed sites, in extraction sockets and together with bone augmentation procedures in the maxilla were evaluated after one year in function. Individual healing periods varying from 0 to 6 months had been used. Insertion torque (IT) and resonance frequency analysis (RFA) measurements were made at baseline. Follow-up RFA registrations were made after 6 and 12 months of loading. The marginal bone levels were measured in intraoral radiographs from baseline and after 12 months. A reference group consisting of 163 consecutive straight maxillary implants was used for the comparison of baseline IT and RFA measurements. Results: Five implants failed before loading, giving an implant survival rate of 96.9% and a prosthesis survival rate of 99.4% after one year. The mean marginal bone loss after one year was 0.5 mm (SD 0.4). The mean IT was statistically significantly higher for tapered than for straight reference implants (41.3 ± 12.0 Ncm vs 33.6 ± 12.5 Ncm, p < 0.001). The tapered implants showed a statistically insignificantly higher mean ISQ value than the straight references implants (73.7 ± 6.4 ISQ vs 72.2 ± 8.0 ISQ, p=0.119). There was no correlation between IT and marginal bone loss. There was a correlation between IT and RFA measurements (p < 0.001). Conclusion: The tapered implant showed a high survival rate and minimal marginal bone loss after one year in function when using various protocols for placement. The tapered implant showed significantly higher insertion torque values than straight reference implants. 12 09 2016 680 691 TODENTJ-10-680 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2016-05-23 2016-10-07 2016-10-31 2016-12-09 https://creativecommons.org/licenses/by/4.0/legalcode 10.2174/1874210601610010680 1553506889 https://opendentistryjournal.com/VOLUME/10/PAGE/680/ https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-680/TODENTJ-10-680.xml Int. 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