Personalized pure tantalum false tooth inner crown laser additive manufacturing forming method

Abstract

The invention discloses a personalized pure tantalum false tooth inner crown laser additive manufacturing forming method which includes the steps: first, scanning a tooth loss portion in an oral cavity to obtain oral cavity scanning data results; second, building a false tooth inner crown three-dimensional model by three-dimensional modeling software, adding supports and performing correction andoptimization; third, leading an optimized three-dimensional model into a laser additive manufacturing device to manufacture a pure tantalum false tooth inner crown formed part; fourth, performing heattreatment on the pure tantalum false tooth inner crown formed part, removing the supports and blasting sands; fifth, corroding the surface of the pure tantalum false tooth inner crown formed part after sand blasting, and drying the pure tantalum false tooth inner crown formed part after ultrasonic cleaning to obtain a pure tantalum false tooth inner crown. An oral cavity data scanning technologyis combined with a laser additive manufacturing technology, tantalum powder serves as a raw material to prepare the personalized pure tantalum false tooth inner crown, the matching degree of the puretantalum false tooth inner crown and the tooth loss portion in the oral cavity is increased, human body safety of the false tooth inner crown is improved by the aid of the performance of pure tantalum, and the service life of the pure tantalum false tooth inner crown is prolonged.

Description

technical field [0001] The invention belongs to the technical field of oral restorative treatment instruments, and in particular relates to a laser additive manufacturing forming method of a personalized pure tantalum denture inner crown. Background technique [0002] Tooth loss is a common and frequently-occurring disease in humans. According to statistics, nearly 2 billion people around the world suffer from various dental diseases. In my country, there are more than 370 million tooth loss patients, and more than 3 billion caries. The patient population is huge. Missing teeth are not only aesthetically pleasing and distort the face, but can also lead to a variety of problems. (1) Alveolar bone atrophy caused by tooth loss: After tooth loss, the physiological stimulation of alveolar bone by normal occlusal force will no longer exist. Restoring and maintaining the balance and stability of the oral and maxillofacial region brings great difficulties; (2) Loss of teeth leads t...

AI Technical Summary

Problems solved by technology

Missing teeth are not only aesthetically pleasing, deforming the face, but can also lead to a variety of problems

(1) Alveolar bone atrophy caused by tooth loss: After tooth loss, the physiological stimulation of alveolar bone by normal occlusal force will no longer exist. Restoring and maintaining the balance and stability of the oral and maxillofacial region brings great difficulties; (2) Loss of teeth leads to decreased masticatory function: After tooth loss, a series of changes occur in the remaining teeth, which changes the original good occlusal relationship. The effective functional area between the remaining teeth is correspondingly reduced, and the chewing efficiency is reduced; (3) Tooth loss is likely to cause food impaction: the normal teeth are arranged very closely, and after the adjacent teeth move, there will be gaps between the teeth, which is easy to Make food impacted into the gap between the teeth, causing oral diseases, such as bad breath, dental caries, periodontal disease, etc.; (4) missing teeth will destroy the integrity of the dentition: after the tooth is missing, if it is not repaired for a long time, the adjacent Due to the loss of support and restraint, the teeth will become inclined, which will easily cause the disorder of occlusal function; (5) the loss of teeth will also cause the loss of teeth: because the teeth on the left and right sides of the missing teeth cannot obtain their original supporting pressure , they can become misaligned in the gums, gradually loosening the teeth and causing some of them to fall out

[0003] my country has become the world's largest potential market for medical devices for dental restoration and replacement therapy, and artificial dentures are the preferred and main treatment for middle-aged, elderly and low-income patients with missing teeth at present and for a long period of time in the future, but traditional artificial dentures There are biocompatibility or biomechanical properties that cannot fully meet the clinical long-term use requirements, and the production of dentures (also known as nominal teeth) currently on the market mainly adopts traditional artificial casting and CNC machining center cutting.

However, the process of manual casting is slow and the repair rate is high; the cost of cutting with CNC machining center is high and the precision is low

In addition, traditional dentures are mostly made of titanium, titanium alloys, Co-based alloys, etc., and their long-term biocompatibility and biosafety cannot fully meet the requirements of clinical use.

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