US2008176190A1PendingUtilityA1

Use of bioactive glass

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Assignee: IMP COLLEGE INNOVATIONS LTD OFPriority: Mar 30, 2001Filed: Dec 18, 2007Published: Jul 24, 2008
Est. expiryMar 30, 2021(expired)· nominal 20-yr term from priority
Inventors:Richard CookTimothy WatsonLarry L. HenchIan Thompson
A61L 27/10C03C 4/0014C03C 12/00C03C 10/00A61F 2002/30016B24C 11/00A61F 2310/00329C03C 4/0007A61F 2002/2878A61F 2240/001A61F 2002/30976B24C 1/045A61F 2002/183A61F 2/3094C03C 3/097A61C 3/025A61L 27/50A61F 2250/0019
61
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Claims

Abstract

The present invention relates to the use of a bioactive glass as an air abrasive agent for use in the treatment of dental disorders.

Claims

exact text as granted — not AI-modified
1 . A method of polishing at least one tooth structure of a person comprising applying bioactive glass particles directly to said at least one tooth structure of said person using an air abrasion system. 
   
   
       2 . A method of cleaning at least one tooth structure of a person comprising applying bioactive glass particles directly to said at least one tooth structure of said person using an air abrasion system. 
   
   
       3 . A method according to  claim 1 , wherein the bioactive glass comprises a source of SiO 2  or Si(OH) 2 , and a source of CaO 2  and/or P 2 O 5 . 
   
   
       4 . A method according to  claim 3 , wherein the bioactive glass further comprises at least one hardening agent and/or at least one softening agent. 
   
   
       5 . A method according to  claim 4 , wherein the softening agent is selected from Na, K, Ca, Mg, B, Al, P, N, F and the hardening agent is TiO 2 . 
   
   
       6 . A method according to  claim 1 , wherein the bioactive glass comprises 1 to 100% SiO 2  or Si(OH) 2 , 0 to 60% CaO, 0 to 60% P 2 O 5 , 0 to 45% Na 2 O, 0 to 45% K 2 O and 0 to 40% MgO. 
   
   
       7 . A method according to  claim 6 , wherein the bioactive glass comprises 44 to 86 weight % SiO 2 , 4 to 46 weight % CaO and 3 to 15 weight % P 2 O 5 . 
   
   
       8 . A method according to  claim 7 , wherein the bioactive glass comprises 58 weight % SiO 2 , 33 weight % CaO and 9 weight % P 2 O 5 . 
   
   
       9 . A method according to  claim 6 , wherein the bioactive glass comprises 40 to 51 weight % SiO 2 , 23 to 25 weight % CaO, 23 to 25 weight % Na 2 O and 0 to 6 weight % P 2 O 5 . 
   
   
       10 . A method according to  claim 9 , wherein the bioactive glass comprises (by weight):
 SiO 2 -45%   CaO-24.5%   Na 2 O-24.5%   P 2 O 5 -6%.   
   
   
       11 . A method according to  claim 1 , wherein the bioactive glass is obtainable by the Sol-Gel method. 
   
   
       12 . A method according to  claim 1 , wherein the bioactive glass is obtainable by the Melt method. 
   
   
       13 . A method according to  claim 1 , wherein the bioactive glass comprises 45S5 (Bioglass®). 
   
   
       14 . A method according to  claim 1 , wherein the bioactive glass has a Vickers Hardness of at least that of healthy tooth dentine and at most of that of tooth enamel. 
   
   
       15 . A method according to  claim 13 , wherein the bioactive glass has a Vickers hardness of at least about 70 and at most about 300. 
   
   
       16 . A method according to  claim 1 , wherein the bioactive glass particles are substantially spherical. 
   
   
       17 . A method according to  claim 1 , wherein the bioactive glass particles have a diameter of from 10 μm to 500 μm.

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