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Dental mill blanks, dental restorations, and methods of forming dental mill blanks

A technology for restorations and restoration materials, which is applied in the field of dental grinding blanks for the production of dental restorations, and can solve problems such as forming dental restorations

Active Publication Date: 2018-02-27
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to form dental restorations from these dental mill blanks as this requires precise positioning of the restoration design within the dental mill blank during milling to achieve the desired esthetics

Method used

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  • Dental mill blanks, dental restorations, and methods of forming dental mill blanks
  • Dental mill blanks, dental restorations, and methods of forming dental mill blanks
  • Dental mill blanks, dental restorations, and methods of forming dental mill blanks

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0154] Image 6 The dental abrasive blank 600 of Example 1 shown in FIG. 1 is approximately 14mm x 14mm x 18mm. A dental mill blank 600 is formed having a first layer 602 of a first hard restorative material and a second layer 604 of a second hard restorative material, the first hard restorative material having a color (A3) and translucency of A3-LT (low translucency), the second hard restorative material has a shade (A2) and translucency (high translucency) of A2-HT. Table 2 provides L*, a*, b* and contrast ratio values ​​for layer 602 and layer 604.

[0155] Table 2

[0156]

[0157]Both layers were formed from a paste and coextruded, both as discussed above. The coextruded dental abrasive blank of Example 1 was cured according to the conditions described in "Example: formation of a net shape crown by molding" in WO 2011 / 087832 (Craig et al.) . The interfaces of the first and second layers each form a first curve 612 having the shape of a circular arc with a radius...

example 2

[0161] To demonstrate the more natural appearance of dental restorations milled from dental abrasive blanks of the present invention, by Figure 8 The dental mill blank 800 was milled into the first anterior crown, made of a single piece Lava TM Ultimate TM The A2HT CAD / CAM restoration was milled from the blank to form the second anterior crown identical to the first anterior crown.

[0162] Figure 8 The dental mill blank 800 is approximately 14mm x 14mm x 18mm. A dental mill blank 800 was formed having the following layers: a first layer 802 of a first hard restorative material having a shade of A3-LT (A3) and translucency (low translucency), a shade of A2-LT (A2 ) and translucency (low translucency) of the second hard restorative material second layer 804, and a third hard restorative material third layer of chroma (A1) and translucency (high translucency) of A1-HT 824. Table 3 provides L*, a*, b* and contrast ratio (CR) values ​​for layer 802, layer 804, and layer 82...

example 3

[0168] Example 3: Milling time for an anterior crown using the dental mill blank of Example 2

[0169] A first anterior crown was milled from a dental mill blank 800 formed according to Example 2 on a CEREC MCXL from Sirona (Germany). After loading the dental mill blank 800 in the CEREC MCXL, according to CAD software option for internal discrete shape dental milling blanks for milling dental restorations.

[0170] The second anterior crown, like the first anterior crown, was also milled from a dental mill blank 800 formed according to Example 2 on a CEREC MCXL from Sirona (Germany). After loading dental mill blank 800 in CEREC MCXL, according to CAD software option for TriLuxe Dental Mill Blanks (flat, layered polychromatic dental mill blanks) for milling dental restorations.

[0171] A stopwatch was used to measure the time from start to end of the milling cycle for both the first anterior crown and the second anterior crown. Milling times for the first and second a...

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Abstract

The present invention provides a dental mill blank and a method for forming the dental mill blank. The dental mill blank comprises a first layer (102) of a first hard restorative material having a first translucency and a first shade, a second layer (104) of a second hard restorative material having a second translucency and a second shade. A quality restorative material, wherein at least one of the following is true: the first translucency is different from the second translucency, and the first shade is different from the second shade. The first layer (102) and the second layer (104) form a first interface having a first curve (112) across a first plane of symmetry (114) of the dental mill blank, wherein said first curve (112) has a non-zero curvature; and a first straight line (122) extending along the full length of said second plane (118) of said dental mill blank, said second plane (118) Orthogonal to said first plane of symmetry (114).

Description

technical field [0001] The present disclosure relates to dental mill blanks, particularly dental mill blanks for the production of dental restorations. Background technique [0002] Dental mill blanks are blocks of material from which dental restorations are formed. Dental mill blanks are available in a variety of shades and translucencies. To best match the natural shade and translucency of the patient's natural tooth structure, the professional dentist selects dental mill blanks with the appropriate shade and translucency for dental restorations. However, these natural tooth structures come in a variety of shades and translucencies, which can be difficult to grasp. [0003] This difficulty arises because, due to the internal structure of the tooth, natural tooth formations (e.g. natural teeth) have gradients of shade and translucency extending from the gingival region to the incisal / occlusal surfaces. In an attempt to simulate this gradient, a dental mill blank was form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C13/00
CPCA61C13/0004A61C13/0006A61C13/0022A61C13/082A61C13/09G16H20/40
Inventor J·C·罗尔夫R·P·鲁辛C·F·诺曼M·B·古斯塔弗森J·D·哈默C·G·卡特R·A·伯伊默B·N·霍姆斯T·瓦尔德拉普B·P·海斯莱特
Owner 3M INNOVATIVE PROPERTIES CO