There was a trend towards significance for a greater increase in the percentage of BOP for gold abutments when compared to alumina abutments, although there was only one study comparing these materials [ n = 1; mean difference = −4.24%; 95% CI (−8.86%; 0.38%); p < .072].
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Effects of modified abutment characteristics on peri-implant soft tissue health: A systematic review and meta-analysis.
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