Integrated fiber post for dental restoration and preparation method thereof
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A dental restoration and fiber technology, which is applied in dental prostheses, dental preparations, dentistry, etc., can solve the problem that fiber posts cannot well meet the restoration of tooth defects, and achieves high consistency, simple processing methods, and easy application. Effect
Active Publication Date: 2010-08-18
北京欧亚瑞康新材料科技有限公司
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[0012] The present invention proposes a design and processing method for an integrated fiber post-core for dental restoration, aiming at the fact that the existing fiber posts cannot well meet the clinical requirements for tooth defect repair.
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Embodiment 1
[0034] Pultrusion preparation of fiber-reinforced resin-based composite body:
[0035] The basic formula of matrix resin is: American Dow Der331 epoxy resin: 100 parts, curing agent: methyltetrahydrophthalic anhydride (80 parts), accelerator: DMP-30 (1 part), mold release agent: 1.5 parts, strengthen The fiber is HS4 continuous long fiber, the fiber tensile strength is 4600MPa, the elastic modulus is 86.4GPa, the density is 2.53g / cm3, and the elongation at break is 5.3%. It is produced by Nanjing Glass Fiber Research and Design Institute; the surface of non-woven glass fiber Felt 30-80g / m 2 , produced by Yixing Fuxing Fiberglass Co., Ltd.
[0036] The green body is prepared by pultrusion process in a circular mold with a diameter of 10mm. The pultrusion process adopts a three-stage heating method, the temperature of the first stage: 140°C, the temperature of the second stage: 165°C, and the temperature of the third stage: 185°C. The stretch-extruded strip was post-cured in ...
Embodiment 2
[0047] In-situ light-curing molding preparation of fiber-reinforced resin-based composite body:
[0048] The basic formula system is: photocurable resin monomer bisphenol A glycidyl methacrylate (Bis-GMA), diluent triethylene glycol dimethacrylate (TEGDMA), catalyst camphorone (CQ) and co-initiator Reagent N,N-dimethylaminoethyl methacrylate (DMAEMA) was purchased from Aldrich Company. High-strength glass fiber, HS4, fiber tensile strength is 4600MPa, elastic modulus is 86.4GPa, density is 2.53g / cm 3 , The elongation at break is 5.3%, produced by Nanjing Glass Fiber Research Institute. Non-woven fiberglass surface mat 30-80g / m 2 , produced by Yixing Fuxing Fiberglass Co., Ltd.
[0049] On-site light-curing molding green body of light-curing prepreg: Weigh 49.5g Bis-GMA and TEGDMA respectively and put them in a 250ml three-neck flask, stir at high speed for 6h to mix evenly, then add 0.5g each of CQ and DMAEMA to the resin system, and then Stir for 1 h to obtain a photocura...
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Abstract
The invention discloses an integrated fiber post for dental restoration and a preparation method thereof. The integrated fiber post for dental restoration is characterized by integrating a post and a core and comprising a post and core tail part and a head core part; the conical structure of the post and core tail part is consistent with the conical structure of a dental drilling head; the head core part is in an umbrella cap structure; the lower edge of the umbrella cap structure is fully matched with the residual part of a defected tooth; the outline part of the umbrella cap structure is fully matched with a crown part; and a porcelain crown is directly sleeved on the head core part. The method for forming and machining the integrated fiber post comprises the following steps of: (1) acquiring CT (computed tomography) data of the defected tooth; (2) reconstructing the three-dimensional model of the tooth and a post and core crown through a computer; (3) building a CAD (computer-aideddesign) model of the integrated post and core; (4) transferring the information of the CAD model of the integrated fiber post and core into a CAM (computer-aided manufacturing) numerical control center; and (5) cutting and machining the integrated fiber post and core by a machining center of a numerical control machine. The fiber post of the invention has improved strength, reduced post and core abhesion in application, and avoidances of breakage of tooth posts and failure of restoration caused by stress concentration.
Description
technical field [0001] The invention relates to a processing method for an integrated fiber post and core for dental restoration, in particular to a method for preparing a fiber-reinforced resin-based composite material rod body and an integrated post and core by pultrusion curing molding or on-site photocuring molding of light-curing prepreg digital modeling and machining methods. Background technique [0002] With the continuous development of modern root canal treatment technology and the continuous improvement of dental materials, a large number of teeth with severe tooth defects have been preserved. Post-core restoration technology is an important means to preserve the affected teeth and restore their functions. The post-core is a prosthesis used to improve the resistance and retention of the affected tooth. It consists of two parts, the post and the core. The post is cemented in the root canal to achieve retention, and the core restores the shape of the defective tooth...
Claims
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