Implant Crown & Bridge
Cement-Retained Crown
Crowns for cement-retained implant restorations are cemented to the abutment intraorally after the abutment is placed and the abutment screw has been torqued.
Abutments for cement-retained restorations can be either digitally designed custom abutments or stock abutments. Custom abutments in titanium, gold-shaded titanium or zirconia provide excellent esthetics. They can be anatomically shaped for a natural look and margins can be placed at or just below the ginigval margin to minimize issues with cement remaining.
Screw-Retained Crown
Screw-retained implant restorations are also referred to as "screwmentables" since the crown is cemented to the abutment extraorally.
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A screw access hole in the crown connects the abutment/crown assembly to the implant. This hole is typically closed with teflon tape and composite filling material.
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Margins on screw-retained restorations can be placed further below the ginigval margin since the crown is cemented extraorally. This helps to minimize show through of the abutment in thin tissue
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Screw-retained restorations require a minimum interarch space of 8-9 mm.
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About 3 mm is needed for soft tissue, 4 mm is the minimum for the abutment height for good retention, and a minimum of 1-2 mm is needed for restoration material, depending on the material chosen.
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Angulation of the implant may affect the amount of interarch space needed.
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Screwmentable abutments can be provided in titanium, gold-shaded titanium or zirconia depending on the manufacturer of the abutment.
Custom Abutment
Custom abutments are available from several manufacturers. Custom abutments are digitally designed and may be a single piece construction in titanium, gold-shaded titanium or zirconia, or two-piece construction with a titanium interface or base with a zirconia top. You have a choice of materials for the restoration placed on the abutment.
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