# US 2013/0157212 A1 · Method for detaching a bonded connection by means of electromagnetic radiation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157212 A1 - Document ID: US20130157212A1 - Status: Published application - Kind: A1 - Application number: 13/703,041 - Filed: 2011-06-10 - Published: 2013-06-20 - Earliest claimed: 2010-06-10 - Inventors: Raimund Hibst; Ralph G. Luthardt; Karl Stock; Heike Rudolph; Katharina Kuhn - Web page: https://patentgrep.com/patent/US20130157212A1 ## CPC - A61C 7/023: {for debonding or removing orthodontic devices} - A61C 5/30: Securing inlays, onlays or crowns - A61C 5/50: Implements for filling root canals; Methods or instruments for medication of tooth nerve channels - A61C 5/70: Tooth crowns; Making thereof - A61C 7/16: specially adapted to be cemented to teeth - A61C 19/004: {Hand-held apparatus, e.g. guns} - A61K 6/15: Compositions characterised by their physical properties - A61K 6/30: Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives - A61C 8/0048: {Connecting the upper structure to the implant, e.g. bridging bars (A61C8/0028 takes precedence)} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) ## Abstract The invention relates to a method for reversibly securing an attachment part to a base part by means of a connecting means which rigidly connects these parts to each other. For this purpose, an adhesive separating material is disposed between the base part and the attachment part, said material losing its adhesive effect reversibly or irreversibly under the effect of electromagnetic radiation. ## Claims ### Claim 1 A method of reversibly fastening an attachment onto a base with a bond that solidly connects these parts to each other, comprising the step of: providing between the base and the attachment an adhesion-promoting separating material that loses its adhesion-promoting effect reversibly or irreversibly under the influence of electromagnetic irradiation. ### Claim 2 (depends on 1) The method according to claim 1 for reversibly fastening dental restorations, fillings and/or brackets, which form the attachment, onto the base that is formed from a tooth, residual tooth, or implant, further comprising the step of: introducing into the connecting joint a light absorber that, by absorbing irradiated electromagnetic irradiation of a suitable wavelength, causes disintegration of the bond. ### Claim 3 (depends on 2) The method according to claim 2, wherein the absorber is admixed with a conventional dental fastening material. ### Claim 4 (depends on 2) The method according to claim 2, wherein the absorber is admixed with a specifically developed fastening material. ### Claim 5 (depends on 2) The method according to claim 2, wherein introducing the absorber is carried out by applying an absorbing layer onto the tooth or the dental restoration or the bracket. ### Claim 6 (depends on 4) The method according to claim 4, wherein introducing the absorber is carried out in combination with a dental bonding system. ### Claim 7 (depends on 1) The method according to claim 1, wherein the wavelength range of the irradiation is selected such that an absorption as high as possible is achieved in the light-absorbing material. ### Claim 8 (depends on 1) The method according to claim 1, wherein the wavelength range of the irradiation is selected such that a transparency as high as possible is achieved for the base or attachment to be penetrated by irradiation. ### Claim 9 (depends on 2) The method according to claim 2, wherein the absorber is selected so as to cause no visible discoloration of the bond. ### Claim 10 (depends on 1) The method according to claim 1, wherein the absorber is selected so as not to be sensitive to normal ambient conditions so that over time, no deterioration of the bond occurs. ### Claim 11 (depends on 2) The method according to claim 2, wherein nanoparticles are used as an absorber. ### Claim 12 (depends on 1) The method according to claim 1, wherein a photodegradable absorber is integrated in the separating material. ### Claim 13 (depends on 1) The method according to claim 1, wherein the irradiation is carried out using pulsed lasers. ### Claim 14 (depends on 1) The method according to claim 1, wherein the pulse duration of the laser is shorter than 1 ms. ### Claim 15 (depends on 1) The method according to claim 1, wherein detaching the bond takes place by thermomechanical ablation. ### Claim 16 (depends on 1) The method according to claim 1, wherein detaching the bond takes place by optomechanical interaction. ### Claim 17 (depends on 1) The method according to claim 1, wherein detaching the bond takes place photochemically. ### Claim 18 (depends on 1) The method according to claim 1, wherein the irradiation takes place through a simultaneous, full-surface irradiation of the connecting joint. ### Claim 19 (depends on 1) The method according to claim 1, wherein the irradiation takes place sequentially in subareas. ### Claim 20 (depends on 1) The method according to claim 1, wherein the irradiation takes place through multifocal irradiation. ### Claim 21 (depends on 1) The method according to claim 1, wherein the irradiation causes only a weakening of the bond. ### Claim 22 (depends on 1) The method according to claim 1, wherein detaching the bond takes place by using known dental tools. ### Claim 23 (depends on 1) A component for carrying out the method according to claim 1, this component consisting of a base, an attachment and a bond that firmly connects the base and the attachment to each other, characterized by providing between the base and the attachment an adhesion-promoting separating material that loses its adhesion-promoting effect reversibly or irreversibly under the influence of electromagnetic irradiation. ### Claim 24 (depends on 23) The component according to claim 23, wherein the separating material is applied onto the joining surface of the base and/or the attachment to the separating material, or is introduced into the separating material. ### Claim 25 (depends on 23) The component according to claim 23, wherein the electromagnetic irradiation lies in the range of the visible light and in the frequency range adjacent thereto. ### Claim 26 (depends on 22) The component according to claim 22, wherein the electromagnetic irradiation consists of short high-energy pulses. ### Claim 27 (depends on 26) The component according to claim 26, wherein for emitting the electromagnetic irradiation, a Q-switched Nd:YAG laser is provided. ### Claim 28 (depends on 22) The component according to claim 22, wherein the attachment is transparent or at least has little absorption for electromagnetic irradiation. ### Claim 29 (depends on 22) The component according to claim 22, wherein the separating material has high absorption with respect to the electromagnetic irradiation. ### Claim 30 (depends on 22) The component according to claim 22, wherein the separating material contains amorphous carbon. ### Claim 31 (depends on 22) The component according to claim 22, wherein the separating material quantitatively reflects in the visible spectrum and absorbs in the near-infrared range. ### Claim 32 (depends on 22) The component according to claim 22, wherein under optomechanical interaction, the separating material undergoes a phase change with volume change or consistency change. ### Claim 33 (depends on 22) The component according to claim 22, wherein under the influence of the electromagnetic irradiation, microplasmas with shock waves resulting therefrom are triggered in the separating material. ### Claim 34 (depends on 33) The component according to claim 33, wherein caused by the microplasmas or the shock waves, the reversible or irreversible loss of the adhesion-promoting effect of the separating material occurs. ### Claim 35 (depends on 22) The component according to claim 22, wherein the base is formed from a tooth, a ground tooth, an implant or the like, and the attachment is formed from a crown, a bracket, a filling, a bridge, or a veneer.