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. 2017 Nov 3;9:93–97. doi: 10.2147/CCIDE.S146544

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Implant-supported fixed restorations are fabricated for a passive fit.

Notes: This means there is no binding of the retainer intaglio against the abutment surface. Also, there would be a space between the intaglio of the retainer and the abutment surface. The interceding space and any marginal gap may expose the cement to oral fluids and result in dissolution of a soluble cement. If the cement does dissolve under one abutment and the other retainer is held by the cement, there may be an overload of the other supporting implant. This may cause a loss of integration.