𝐒𝐡𝐚𝐩𝐞, 𝐓𝐞𝐱𝐭𝐮𝐫𝐞, 𝐂𝐨𝐥𝐨𝐫, T𝐫𝐚𝐧𝐬𝐥𝐮𝐜𝐞𝐧𝐜𝐲, O𝐩𝐚𝐥𝐞𝐬𝐜𝐞𝐧𝐜𝐞.
So Let’s start with
1 ) Color 🔴🔵🟢
Colour doesn’t exist, it’s just present due to reaction between:-
( Light as a stimulus, Eye as receiver & Perception as an individual factor ) .
And the same colour can be looking different from one person to other
And here is an example if we say “Imagine the colour green” to 50 people, the result is this 50 people will imagine the colour green in different degrees from each other.
Therefore, we cannot rely on mental or visual memory, because it is the weakest option available.
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#Color is Hue + Chroma + Value .
𝐇𝐮𝐞: Name of colour.
𝐂𝐡𝐫𝐨𝐦𝐚: degree of saturation " of the dentinal body ".
𝐕𝐚𝐥𝐮𝐞: brightness and darkness of dentinal body " opacity and translucency " ...
Or on other hand, we can say that:-
Hue: the colour of the dentinal body.
Chroma: degree of saturation of dentinal body.
Value: opacity & translucency + degree of whiteness of enamel...
Intensives: spots appear in natural enamel as the white blurred stain.
Opalescence: blue or grey transparent " present in incisal 1/3 & Interproximal enamel " (dentin-free area ).
Characterization: any chance of exit (colour, shape, texture ) of natural teeth as cracks, stains and mamelons.
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𝑳𝒂𝒚𝒆𝒓𝒊𝒏𝒈 𝒆𝒔𝒕𝒉𝒆𝒕𝒊𝒄 𝒎𝒂𝒕𝒆𝒓𝒊𝒂𝒍s are 3 types depending on their Location in the Tooth-Restoration connection.
𝙄𝙣, 𝙤𝙪𝙩, 𝙢𝙞𝙙 .....
1) In :
Is the inner layer of esthetic restoration represented with dentin
And it is controlled by Chroma, opacity, fluorescence and yellowish tooth appearance.
2) out :
Is the Outer layer of esthetic restoration represented with Enamel
And it is controlled by the Value, translucency, transparency and the final colour of a tooth.
3) mid :
Is the layer between IN & OUT of esthetic restoration represented with Different special Characteristics
And it is controlled by Intensives, the characterization of the tooth.
We will discuss each one of them one by one in the next Chapters.
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𝑯𝒐𝒘 𝒕𝒐 𝒄𝒉𝒐𝒐𝒔𝒆 𝒑𝒆𝒓𝒇𝒆𝒄𝒕 𝒄𝒐𝒍𝒐𝒓 𝒐𝒇 𝒓𝒆𝒔𝒕𝒐𝒓𝒂𝒕𝒊𝒐𝒏 𝒕𝒐 𝒎𝒂𝒕𝒄𝒉 𝒏𝒂𝒕𝒖𝒓𝒂𝒍 𝒕𝒐𝒐𝒕𝒉 ?
And the answer here depends on 4 things :
Light Source, tooth surface, shade guide selection, background ...
And let’s start with
1) Light …
And we must agree that the Dental light chair is the poor option to choose because it’s Defect in the red-yellow colour of restoration.
Then “ How to choose the best light source for Color Matching “
𝐋𝐢𝐠𝐡𝐭 𝐭𝐞𝐦𝐩𝐞𝐫𝐚𝐭𝐮𝐫𝐞 𝐬𝐨𝐮𝐫𝐜e :
- Not all light sources are suitable for colour match.
If light < 4000k, it's warm light and .. it will lead to loss of details of yellow and red as dentin.
If light > 7500k, it's cold light... It will lead to loss of details and location of blue and grey as enamel translucent.
SO
( 𝑪𝒐𝒏𝒕𝒊𝒏𝒖𝒆 𝒔𝒐𝒇𝒕 𝒅𝒊𝒇𝒇𝒖𝒔𝒆 Day𝒍𝒊𝒈𝒉𝒕 𝒔𝒐𝒖𝒓𝒄𝒆 𝒘𝒊𝒕𝒉 5500𝒌 𝒊𝒔 𝒕𝒉𝒆 𝒃𝒆𝒔𝒕 𝒐𝒑𝒕𝒊𝒐𝒏 ) .👌
for Example :
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2 ) tooth surface.
𝙏𝙤𝙤𝙩𝙝 - 𝙡𝙞𝙜𝙝𝙩 𝙧𝙚𝙩𝙧𝙖𝙘𝙩𝙞𝙤𝙣 Lead to Optical properties as:-
𝒕𝒓𝒂𝒏𝒔𝒑𝒂𝒓𝒆𝒏𝒕 " total light passes through the material.
𝒕𝒓𝒂𝒏𝒔𝒍𝒖𝒄𝒆𝒏𝒕 " partial light passes through the material.
𝒐𝒑𝒂𝒒𝒖𝒆 " No light passes through the material.
And as dentists, our goal is to 𝘾𝙧𝙚𝙖𝙩𝙚 𝙡𝙖𝙮𝙚𝙧𝙨 𝙤𝙛 𝙧𝙚𝙨𝙩𝙤𝙧𝙖𝙩𝙞𝙤𝙣 𝙢𝙖𝙩𝙚𝙧𝙞𝙖𝙡 𝙩𝙤 𝙖𝙘𝙩 𝙖𝙨 𝙣𝙖𝙩𝙪𝙧𝙖𝙡 𝙩𝙤𝙤𝙩𝙝 𝙞𝙣 its 𝙩𝙧𝙖𝙣𝙨𝙥𝙖𝙧𝙚𝙣𝙩, 𝙩𝙧𝙖𝙣𝙨𝙡𝙪𝙘𝙚𝙣𝙩 and 𝙤𝙥𝙖𝙦𝙪𝙚.
For Example;
- Composite and ceramic enamel: material for translucent and transparent.
- dentin and body composite: material for yellow and opaque.
- pigments are selective opacity.
(Notebook )
⁽ Hɪɢʜ ᴛʀᴀɴsʟᴜᴄᴇɴᴄʏ ᴏꜰ ᴍᴀᴛᴇʀɪᴀʟ ..... Tʜᴇ ᴍᴏʀᴇ ʀᴇᴠᴇᴀʟ ᴏꜰ ʙᴀᴄᴋɢʀᴏᴜɴᴅ ⁾ ......
………………………………………………………………………
3) background.
Different backgrounds can create different effects on the colour of restoration material, especially translucent and transparent enamel
1. Black BG: is the most suitable for discrimination of dentin & enamel shade and easy to see enamel translucent too.
Just like contractors for black Background
2. White BG: is the most suitable when maxillary incisors in occlusion cover mandibular incisors. To allow differentiation between ( translucent mass and dentine properties ).
3 . Neutral grey BG: for choosing Hue.
4. Another colour: it's just for artists.
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And after we talk about --- { light, BG, tooth surface }
Let’s talk about one of the most important parts of this Chapter...
4) shade guide selection...
We usually select tooth Shade using these methods
- C𝒐𝒏𝒗𝒆𝒏𝒕𝒊𝒐𝒏𝒂𝒍 D𝒆𝒏𝒕𝒂𝒍 𝑺𝒉𝒂𝒆 G𝒖𝒊𝒅𝒆, for Example :
vita shade guide or 3d vita shade ceramic guide which is easy, fast and stable to use for communication between Dentist and Dental Lab...
But one of its huge Disadvantages is
𝙏𝙝𝙚 𝙗𝙞𝙜 𝙙𝙞𝙛𝙛𝙚𝙧𝙚𝙣𝙘𝙚 𝙗𝙚𝙩𝙬𝙚𝙚𝙣 𝙘𝙚𝙧𝙖𝙢𝙞𝙘 𝙖𝙣𝙙 𝙘𝙤𝙢𝙥𝙤𝙨𝙞𝙩𝙚 𝙞𝙨 𝙞𝙣 𝙤𝙥𝙩𝙞𝙘𝙖𝙡 𝙖𝙣𝙙 𝙥𝙝𝙮𝙨𝙞𝙘𝙖𝙡 𝙥𝙧𝙤𝙥𝙚𝙧𝙩𝙞𝙚𝙨. 𝙒𝙝𝙞𝙘𝙝 𝙢𝙖𝙮 𝙘𝙖𝙪𝙨𝙚 𝙛𝙖𝙞𝙡𝙪𝙧𝙚 𝙞𝙣 𝙘𝙤l𝙤𝙪𝙧 𝙢𝙖𝙩𝙘𝙝𝙞𝙣𝙜.
C𝒖𝒔𝒕𝒐𝒎 S𝒉𝒂𝒅𝒆 G𝒖𝒊𝒅𝒆: created using the composite system currently used in your clinic. It can be created for each shade or even in a layered approach for commonly used dentine/enamel combinations or characterisations. This also allows us control over the material thickness so we can assess how light passes through the material.
For Example:-
1) Estelite omega ( tokuyama )
2) my shade ( smile line )
3) custom SG ( 3M )
And for me this Method is the best way, Because:-
1. the best way to determine each layer of Layering tech.
2. easily to add any intensive and characterization in your custom kit, so you can see how it’s looking before working inpatient'sNotebookent mouth
3. High Color stability After curing of Composite restoration.
4. overcome the main problem with Composite restorations, that All composite materials with the same shade and different brands, not the same colour match...
5. improve high shade and colour matching...
(Notebook )
If you don’t have money to buy a Custom shade guide, you can it yourself with simple tools
DIY kit using plastic cutlery as handles and PVS impressions of VITA shade tabs as mould 😉
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And at the end of this chapter, let’s ask the final Question ….
#𝐇𝐨𝐰 𝐭𝐨 𝐭𝐚𝐤𝐞 𝐭𝐡𝐞 𝐦𝐨𝐬𝐭 𝐩𝐞𝐫𝐟𝐞𝐜𝐭 𝐦𝐚𝐭𝐜𝐡 𝐛𝐞𝐭𝐰𝐞𝐞𝐧 𝐫𝐞𝐬𝐭𝐨𝐫𝐚𝐭𝐢𝐨𝐧 𝐦𝐚𝐭𝐞𝐫𝐢𝐚𝐥 𝐚𝐧𝐝 𝐧𝐚𝐭𝐮𝐫𝐚𝐥 𝐭𝐨𝐨𝐭𝐡 ?
1) teeth are well hydrated not dry and take shade match before Rubber dam isolation
2) use a light source with 5500 - 5800K
3) place neutral grey background.
4) Matching using a personal Generic guide or custom shade guide.
5) Ask the opinion of the second observer as a nurse
6) Can also use DSLR Camera to Take Photos of the teeth next to the shade guide and send them to Dental Lab. It is easy to communicate between them.
The Quote of this Post is
( 𝘓𝘢𝘺𝘦𝘳 𝘣𝘺 𝘭𝘢𝘺𝘦𝘳 𝘢𝘳𝘵 𝘴𝘵𝘳𝘪𝘱𝘴 𝘭𝘪𝘧𝘦 𝘣𝘢𝘳𝘦 ) .. 𝘙𝘰𝘣𝘦𝘳𝘵 𝘔𝘶𝘴𝘪𝘭 .
