Immediate tooth replacement therapy in postextraction sockets: a comparative prospective study on the effect of variable platform-switched subcrestal angle correction implants

Chu, Stephen J., Saito, Hanae, Östman, Pär-Olov, Levin, Barry P., Reynolds, Mark A., and Tarnow, Dennis P. (2020) Immediate tooth replacement therapy in postextraction sockets: a comparative prospective study on the effect of variable platform-switched subcrestal angle correction implants. International Journal of Periodontics and Restorative Dentistry, 40 (4). pp. 509-517.

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Abstract

Immediate tooth replacement therapy (ITRT), ie, immediate implant placement and provisional restoration in postextraction sockets, has been shown to achieve favorable outcomes in reference to soft tissue stability and esthetics. However, avoiding socket perforation with uniaxial implants in the anterior maxilla can be challenging due to the inherent anatomy. Dual or co-axis subcrestal angle correction (SAC) implants have been developed to change the restorative angle of the clinical crown restoration subcrestally at the implant-abutment interface to enhance the incidence of screw-retained definitive restorations. An additional benefit of this macrodesign implant feature is variable platform switching (VPS) that increases soft tissue gap distance above the implant platform. The purpose of this prospective study on ITRT in maxillary anterior postextraction sockets was to investigate the effect of SAC with VPS (SAC/VPS) compared to conventional platform-switch-design implants (PS) relative to ridge dimension stability and peri-implant soft tissue thickness. A total of 29 patients had undergone ITRT and received either a PS or SAC/VPS implant; previously described measurements were made compared to the contralateral natural tooth sites. When the comparison of buccal soft tissue thickness was made, SAC/VPS showed a greater increase compared to PS (3.12 mm vs 2.39 mm, respectively) with statistical significance (P = .05). The increase was independent from periodontal phenotype. Therefore, SAC/VPS may increase pen soft tissue thickness and help minimize recession following ITRT.

Item ID: 63793
Item Type: Article (Research - C1)
ISSN: 1945-3388
Copyright Information: © 2020 BY QUINTESSENCE PUBLISHING CO, INC. PRINTING OF THIS DOCUMENT IS RESTRICTED TO PERSONAL USE ONLY. NO PART MAY BE REPRODUCED OR TRANSMITTED IN ANY FORM WITHOUT WRITTEN PERMISSION FROM THE PUBLISHER.
Date Deposited: 15 Jul 2020 07:52
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3203 Dentistry > 320310 Periodontics @ 100%
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