Platform switching in two-implant bar-retained mandibular overdentures: 1-year results from a split-mouth randomized controlled clinical trial.

Abou-Ayash, Samir; Schimmel, Martin; Kraus, Dominik; Mericske-Stern, Regina; Albrecht, Dominic; Enkling, Norbert (2020). Platform switching in two-implant bar-retained mandibular overdentures: 1-year results from a split-mouth randomized controlled clinical trial. Clinical oral implants research, 31(10), pp. 968-979. Wiley-Blackwell 10.1111/clr.13640

Preview	Text Manuskript_1_year_platformswitch_final_Accepted.pdf - Accepted Version Available under License Publisher holds Copyright. Download (612kB) | Preview
	Text clr.13640.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (1MB)

OBJECTIVES

The concept of platform switching is widely applied in current implant dentistry, however, the influence on peri-implant bone level alterations (ΔIBL), especially in the field of implant overdentures (IODs), remains inconclusive. Therefore, the present study aimed to test the alternative hypothesis that there is an equivalent ΔIBL at platform-switching and platform-matching implant abutments in 2-implant bar-retained IODs.

MATERIALS AND METHODS

Two interforaminal implants were placed in 32 subjects, who were randomly assigned to either an immediate- or a 3-month post-placement loading group. Furthermore, one implant in each subject was randomly assigned to receive a platform-switched (test), and one a platform-matching abutment (control). The implants were splinted with prefabricated, chairside customized bars. ΔIBL was recorded by using customized radiograph holders at implant placement, implant loading, 3 months, 6 months, and 12 months after loading.

RESULTS

After one year, equivalent ΔIBL could be identified (test: -0.51 mm +/- 0.49 vs. control: -0.56 mm +/- 0.52; p<0.001). ΔIBL increased over time and was more pronounced in the delayed-loaded (-0.87 mm +/- 0.61) relative to the immediately loaded implants (-0.35 mm +/- 0.43; p = 0.022).

CONCLUSIONS

The prosthetic concept of platform switching does not necessarily lead to reduced bone loss. Immediate loading of implants, primarily splinted with a bar, might be beneficial regarding peri-implant bone-level changes over a short-term period.

Interest & Impact

Downloads

287 since deposited on 04 Sep 2020
92 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item