Manufacturing method of additional material for all-ceramic dental restoration

An oral restoration and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of material waste, additive manufacturing technology that cannot meet the production requirements of all-ceramic oral restorations, and limited applications

Active Publication Date: 2018-07-06
JIAXING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many problems in the current dental CAD/CAM technology for making all-ceramic restorations: 1) It mainly relies on CNC cutting equipment, the equipment and consumables are expensive, and the waste of materials is large (about 80% of the raw materials can only be treated as waste), lead to high cost of its products
2) During the cutting process, micro-cracks and high-temperature crystallization are prone to occur on the ceramic surface, resulting in a decline in product performance
3) Due to the limitation of the size of the tool, the details of the cusps, grooves, and ridges on the occlusal surface of the crown cannot be processed directly, and subsequent manual lathes are required
4) Because based on the material reduction process, oral CAD/CAM technology can only process a single material, and cannot form a multi-layered crown stru

Method used

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  • Manufacturing method of additional material for all-ceramic dental restoration
  • Manufacturing method of additional material for all-ceramic dental restoration
  • Manufacturing method of additional material for all-ceramic dental restoration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step 1: The abutment to be restored is prepared, the occlusal surface is ground at least 1.5 mm, the lingual and buccal sides are ground 0.8-1.5 mm, and the axial convergence angle is 6-8 degrees.

[0044] Step 2, use silicone rubber to take a full-mouth impression, and pour it with plaster to obtain a model. After trimming the die, put it into the Shining 3D desktop 3D scanner DS200+ to generate a digital model of the dentition, and then use the ExoCad dental CAD software to design the oral restoration model.

[0045] Step 3. Import the designed oral restoration model into the self-developed ToothFairy software, enlarge it according to the scale ratio of 1.265, and then design the digital models of convex and concave female models based on this as a template, and calculate the dental restoration 3D fill / pack path for volumes. like image 3 As shown, this path has been compensated for the nozzle thickness (approximately 0.1mm).

[0046] Step 4: Input the digital mode...

Embodiment 2

[0055] Step 1: The abutment to be restored is prepared, the occlusal surface is ground at least 1.5 mm, the lingual and buccal sides are ground 0.8-1.5 mm, and the axial convergence angle is 6-8 degrees.

[0056] Step 2: Use the Planmeca PlanScan intraoral scanner to directly scan the patient's mouth to generate a digital model of the dentition, and then use the ExoCad dental CAD software to design the oral restoration model.

[0057] Step 3. Import the designed oral restoration model into the self-developed ToothFairy software, enlarge it according to the scale ratio of 1.265, and then design the digital models of convex and concave female models based on this as a template, and calculate the dental restoration 3D fill / pack path for volumes. like image 3 As shown, this path has been compensated for the nozzle thickness (approximately 0.1mm).

[0058] Step 4: Input the digital models of the convex negative mold and the concave negative mold into the SLA light-curing 3D prin...

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Abstract

The invention relates to a manufacturing method of an additional material for an all-ceramic dental restoration. A selective photocuring technology is used for quickly forming to obtain an auxiliary forming mould, the auxiliary forming mould is taken as a template to generate an automatic correction function on a dental restoration ceramic greenware obtained by a ceramic slurry extrusion technology, so as to achieve the advantages of integrating high accuracy of the selective photocuring technology and high quality of the ceramic slurry extrusion technology. In addition, a ceramic slurry extrusion additional material manufacturing device with a special multi-material extrusion device can be used for directly generating the multilayer all-ceramic dental restoration of simulated natural teeth, technical processes are further shortened, and the manufacturing method hopefully serves as a technology of high accuracy and high efficiency for manufacturing the all-ceramic dental restoration infuture.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and particularly relates to an additive manufacturing method for an all-ceramic oral prosthesis. Background technique [0002] Human anatomy varies greatly due to their genetics and the influence of the external environment. In many cases, each dental restoration is unique and only suitable for a specific patient. In addition, oral restorations usually need to meet the dual requirements of functional restoration and aesthetics, not only high dimensional accuracy, but also a series of mechanical properties (strength, hardness, toughness), optical properties (transparency, color, fluorescence) , physicochemical properties (corrosion resistance, water resistance, stability), biological properties (compatibility), etc., so it has very strict requirements on materials and manufacturing processes. [0003] Materials: Oral restoration can be traced back to ancient Rome 2,500 years ago, when artis...

Claims

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Application Information

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IPC IPC(8): A61K6/02B33Y10/00
CPCA61K6/78A61K6/818B33Y10/00
Inventor 谢宝军
Owner JIAXING UNIV
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