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   Offical Journal of The Academy of Osseointegration

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Volume 29 , Issue 6
November/December 2009

Pages 599-605

A Prospective, Randomized, Controlled Comparison of Platform-Switched and Matched-Abutment Implants in Short-Span Partial Denture Situations

Kyle Trammell/Nico C. Geurs, DDS, MS/S. Jean O’Neal, DMD, MS/Perng-Ru Liu, DMD/Sandra J. Haigh, RDH, MS/Sandre McNeal, MS/James N. Kenealy, PharmD/Michael S. Reddy, DMD, DMSc

PMID: 20072737
DOI: 10.11607/prd.00.0893

Recent observations suggest that less bone loss may result from placing a more medialized abutment on an implant (platform switching). The objective of this study was to measure the radiographic crestal bone loss and biologic width around conventional and platform-switched implants. Implants were randomly assigned into conventional or switched categories within the same prosthesis. Twenty-five implants were placed and observed in the mandibles of 10 patients for 2 years. A regression analysis demonstrated a significant difference between groups (P ≤ .0001). These findings suggest that less crestal bone loss occurs around a platform-switched dental implant versus a conventional implant. (Int J Periodontics Restorative Dent 2009;29:599–605.)

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