Chemically strengthened bioactive glass-ceramics

A glass-ceramic composition, comprising:

• a first crystalline phase and a second crystalline phase, in combination, comprising:
• 55 to 65 wt % SiO2,
• 2 to 4 wt % Al2O3,
• 8 to 16 wt % Li2O,
• 1 to 4 wt % Na2O,
• 0.1 to 2% K2O,
• 2 to 5 wt % P2O5
• 1 to 5% ZrO2, and
• 0.1 to 1.0 wt % F—, based on a 100 wt % total of the composition.

A glass-ceramic article comprising:

• 50 to 75 wt % SiO2,
• 1 to 5 wt % Al2O3,
• 0.1 to 10% B2O3,
• 5 to 20 wt % Li2O,
• 0.5 to 5 wt % Na2O,
• 0.1 to 4% K2O,
• 0.5 to 6 wt % P2O5
• 0.5 to 8% ZrO2, and
• 0.1 to 1.0 wt % F−, based on a 100 wt % total of the composition.

A method of making a bioactive glass-ceramic article comprising:

• forming a melt mixture of a source of:
• 50 to 75 wt % SiO2,
• 1 to 5 wt % Al2O3,
• 0.1 to 10% B203,
• 5 to 20 wt % Li2O,
• 0.5 to 5 wt % Na2O,
• 0.1 to 4% K2O,
• 0.5 to 6 wt % P2O5
• 0.5 to 8% ZrO2, and
• 0.1 to 1.0 wt % F−, based on a 100 wt % total of the composition to form a glass-ceramic article;
• forming an article from the melt;
• and
• accomplishing at least one chemical strengthening of the resulting glass-ceramic article.