Degradable magnesium tenting device for faster surgeries and improved outcomes in vertical ridge augmentation
AssigneeUniversity of Pittsburgh—Of the Commonwealth System of Higher Education
InventorsCharles S. Sfeir, Andrew J. Brown
Life of this patent
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Abstract
The invention relates to magnesium screws and screw-like devices for dental implant surgery and, more particularly, to magnesium and magnesium-based tenting devices for implementation in periosteal and gingival tissue overlying an alveolar ridge of a mandible or maxilla to provide vertical ridge augmentation, i.e., bone regeneration. The tenting devices may be composed of magnesium in dry form, such as metallic magnesium and salts thereof; or magnesium alloy including magnesium in dry form and at least one alloying element or compound; or magnesium-polymer composite including magnesium in dry form and at least one polymer.
Claims18
A dental tenting device, comprising:
- at least one biodegradable screw device, comprising:
- a composition, comprising:
- magnesium in dry form;
- or
- a magnesium-based alloy, comprising:
- magnesium in dry form;
- and
- at least one alloying element or compound;
- or
- a magnesium-polymer composite, comprising:
- magnesium in dry form;
- and
- at least one polymer;
- and
- a porous device framework, comprising:
- a screw head comprising a top surface and a bottom surface, wherein the screw head has a first porosity and a first resorption rate;
- a screw shaft connected to the bottom surface of the screw head extending perpendicularly therefrom to an end of the screw shaft,
- wherein the screw shaft has a second porosity that is less than the first porosity and a second resorption rate that is lower than the first resorption rate,
- wherein the screw head extending from the top surface to the bottom surface is resorbed in a shorter time than the screw shaft extending from the bottom surface of the screw head to the end of the screw shaft,
- wherein the screw device is configured to be implanted in periosteal and/or gingival tissue overlying an alveolar ridge of a mandible or maxilla, and
- wherein a sustained release of magnesium ions from the screw device to the periosteal and/or gingival tissue is effective to heal and/or regenerate tissue to increase a vertical height of the alveolar ridge.
A method of making a tenting device, comprising:
- preparing a porous device framework, comprising:
- preparing a magnesium, magnesium alloy or magnesium-polymer composite, comprising:
- (a) selecting magnesium in dry form;
- or
- (b) selecting magnesium in dry form;
- and
- combining the magnesium with at least one alloying element or compound to produce the magnesium alloy;
- or
- (c) selecting magnesium in dry form;
- and
- (d) combining with at least one polymer to form the magnesium-polymer composite;
- forming a screw device from the magnesium, magnesium alloy or magnesium-polymer composite, comprising:
- a screw head comprising a top surface and a bottom surface, wherein the screw head has a first porosity and a first resorption rate;
- a screw shaft connected to the bottom surface of the screw head and extending perpendicularly therefrom to an end of the screw shaft,
- wherein the screw shaft has a second porosity that is less than the first porosity and a second resorption rate that is lower than the first resorption rate,
- wherein the screw head extending from the top surface to the bottom surface is resorbed in a shorter time than the screw shaft extending from the bottom surface of the screw head to the end of the screw shaft,
- wherein the screw device is configured to be implanted in a periosteal and/or gingival tissue overlying an alveolar ridge of a mandible or maxilla, to provide a sustained release of magnesium ions from the screw device to the periosteal and/or gingival tissue to effectively heal and/or regenerate tissue to increase a vertical height of the alveolar ridge.
Dependencies are inferred from the claim text.