𝓒𝓱𝓪𝓹𝓽𝓮𝓻 𝓽𝔀𝓸 : 𝓘𝓝 . ( Layers ) Part 1

Before you start to read this Chapter, you have to remember small things, such as

Chroma , hue & Value

layers of restoration ( IN + MID + OUT )

opacity, vita shade groups

IN layer and intensives and characterization.

and you can see the first chapter Here 

and now we can start this Chapter with a key Question ;

𝐖𝐡𝐚𝐭 𝐰𝐨𝐮𝐥𝐝 𝐛𝐞 𝐲𝐨𝐮𝐫 𝐢𝐝𝐞𝐚𝐥 𝐫𝐞𝐬𝐭𝐨𝐫𝐚𝐭𝐢𝐯𝐞 𝐦𝐚𝐭𝐞𝐫𝐢𝐚𝐥 𝐭𝐨 𝐫𝐞𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐯𝐞 𝐧𝐚𝐭𝐮𝐫𝐞 𝐝𝐞𝐧𝐭𝐢𝐧 ?

and you have to answer this question after reading this Chapter so easily .....

𝙄𝙉 𝙇𝙖𝙮𝙚𝙧 is a layer of composite representing dentin in natural tooth and located in the deepest layer of restoration.

So the name of the material which represents Dentin and is replaced in IN Layer in the market is    ( 𝑫𝒆𝒏𝒕𝒊𝒏 𝑪𝒐𝒎𝒑𝒐𝒔𝒊𝒕𝒆 ). " D "

𝘿𝙚𝙣𝙩𝙞𝙣 𝘾𝙤𝙢𝙥𝙤𝙨𝙞𝙩𝙚: is composite which represents Dentin and replaced in IN Layer.

𝙏𝙝𝙚 𝙥𝙖𝙡𝙖𝙩𝙖𝙡 𝙨𝙞𝙡𝙞𝙘𝙤𝙣𝙚 𝙞𝙣𝙙𝙚𝙭: Palatal 2ry Impression For Wax Up Cast.


 The shade of the Dentin composite depends on two things:-


1- 𝑯𝒖𝒆 & 𝒃𝒂𝒔𝒆 𝑪𝒉𝒓𝒐𝒎𝒂 ..

Hue is between ( Orange-red ) for example = A2, A3 or A3.5
NO ( B Groups. In Dentin shades)

So Mainly, in Dentin shade Selection, we choice base on Chroma.

 𝐜𝐡𝐚𝐫𝐚𝐜𝐭𝐞𝐫𝐢𝐬𝐭𝐢𝐜 𝐨𝐟 𝐧𝐚𝐭𝐮𝐫𝐚𝐥 𝐃𝐞𝐧𝐭𝐢𝐧 :-

𝐄𝐟𝐟𝐞𝐜𝐭 𝐰𝐢𝐭𝐡 𝐀𝐠𝐞.

Hue is 𝐎𝐫𝐚𝐧𝐠𝐞 – 𝐑𝐞𝐝 𝐢𝐧 𝐰𝐢𝐭𝐡 𝐚𝐯𝐞𝐫𝐚𝐠𝐞 𝟓𝟖𝟎𝐦𝐦.

High 𝐜𝐡𝐫𝐨𝐦𝐚𝐭𝐢𝐜𝐢𝐭𝐲, 𝐨𝐩𝐚𝐜𝐢𝐭𝐲 𝐚𝐧𝐝 𝐅𝐥𝐮𝐨𝐫𝐞𝐬𝐞𝐧𝐭 𝐭𝐢𝐬𝐬𝐮𝐞.

Dentin has 𝟐 𝐭𝐲𝐩𝐞 ( 𝐩𝐫𝐢𝐦𝐚𝐫𝐲 𝐚𝐧𝐝 𝐬𝐞𝐜𝐨𝐧𝐝𝐚𝐫𝐲 ),

They are different in:-

1.Chroma : 𝐂𝐞𝐧𝐭𝐫𝐚𝐥 𝐃𝐞𝐧𝐭𝐢𝐧 𝐢𝐬 𝐦𝐨𝐫𝐞 𝐜𝐡𝐫𝐨𝐦𝐚𝐭𝐢𝐜  𝐭𝐡𝐚𝐧 𝐃𝐞𝐧𝐭𝐢𝐧 𝐜𝐥𝐨𝐬𝐞𝐫 𝐭𝐨 𝐭𝐨𝐨𝐭𝐡 𝐬𝐮𝐫𝐟𝐚𝐜𝐞 , 𝐰𝐡𝐢𝐜𝐡  𝐢𝐬 𝐥𝐞𝐬𝐬 𝐜𝐡𝐫𝐨𝐦𝐚𝐭𝐢𝐜 .

If Dentin near to pulp is A3, so Dentin near to surface is A2.
So in incisal 1/3, we find less chromatic than in any place.


And these Differential Chromatic Layers Create a Special Effect Called

 ( 𝑫𝒆𝒔𝒂𝒕𝒖𝒓𝒂𝒕𝒊𝒐𝒏 𝑬𝒇𝒇𝒆𝒄𝒕 .....🙆🏽‍♂️ )

It’s an effect in which Layers of Different Shades are Viewed as One Mass without any Line of Demarkation between them. It creates nature, a deeper esthetic Dentinal body and avoids restoration that looks like a patch.

Effect with Age

An increase in Age Leads to an Increase in Chromatic & hue of Dentin.
Which Lead to:-

1. increase Dentin thickness

2. decrease ( dentinal tubules diameter, volume of pulp, permeability and opacity of dentin ).

So with old Patients, the Shade of Dentin should be a high hue like A3 or A3.5

And Now Let’s talk about the characteristics of Dentin Composite that you should be looking for it:- 

1) opacity
Dentin composite is very efficient opaque and more than enamel, But still has Slightly translucency

◽️Translucency of 1mm of Dentin = 16.2
◽️Translucency of 1mm of enamel = 18.9

And with an increase in thickness, we can use it as a mask for hiding dark colours.. for Example, OmniChroma Blocker  ( 100% Opacity ) 

Which using for:-

• Background for class IV layering restoration 

• Masking for stains and metal posts.

• Preventing shade matching interference

• In class IV restoration especially large defect

• Class III through by through 

• Masking for Discoloration And highly opaque tooth or old restoration 

• Used as palatal layer  anterior restoration to prevent interference between black oral cavity and shade of the restoration 

• Masking or amalgam filling or metal custom made the core build-up

2) Elasticity...
Dentin composite should have the high elasticity to support brittle enamel and resist share force, compression, and traction.

3) Fluorescence  ✳️

Dentin is more Enamel in fluorescence. but What’s fluorescence 

is the emission of light by a substance that has absorbed light or other electromagnetic radiation.

AND 

𝐈𝐧𝐜𝐫𝐞𝐚𝐬𝐞 𝐟𝐥𝐮𝐨𝐫𝐞𝐬𝐜𝐞𝐧𝐜𝐞 𝐥𝐞𝐚𝐝 𝐭𝐨 𝐜𝐫𝐞𝐚𝐭𝐞 𝐩𝐡𝐞𝐧𝐨𝐦𝐞𝐧𝐨𝐧 𝐜𝐚𝐥𝐥𝐞𝐝 ( 𝐈𝐧𝐧𝐞𝐫 𝐆𝐥𝐨𝐰 🌟) , 𝐰𝐡𝐢𝐜𝐡 𝐠𝐢𝐯𝐞𝐧 𝐕𝐢𝐭𝐚𝐥 𝐚𝐩𝐩𝐞𝐚𝐫𝐚𝐧𝐜𝐞 𝐭𝐨 𝐭𝐨𝐨𝐭𝐡 𝐚𝐧𝐝 𝐢𝐭’𝐬 𝐝𝐞𝐜𝐫𝐞𝐚𝐬𝐞 𝐰𝐢𝐭𝐡 𝐚𝐠𝐞 𝐚𝐧𝐝 𝐢𝐧 𝐄𝐧𝐝𝐨𝐝𝐨𝐧𝐭𝐢𝐜 𝐭𝐫𝐞𝐚𝐭𝐞𝐝 𝐭𝐨𝐨𝐭𝐡 (EDT ).

A. Composite Restoration with High Fluorescent

B. Composite Restoration with Low  Fluorescent

So With a Vital tooth, you should use High fluorescent Composite. but With non-vital tooth, you must use it.

For Example, some Name of Famous composite Brands in the Market, with different percentages of  Fluorescence 

Now to Bonus Question ….

👉 𝑯𝒐𝒘 𝒕𝒐 𝒔𝒆𝒍𝒆𝒄𝒕𝒊𝒐𝒏 𝑫𝒆𝒏𝒕𝒊𝒏 𝒄𝒐𝒎𝒑𝒐𝒔𝒊𝒕𝒆 𝒔𝒉𝒂𝒅𝒆

1- 𝐂𝐡𝐨𝐨𝐬𝐞 𝐜𝐡𝐫𝐨𝐦𝐚 𝐦𝐚𝐭𝐜𝐡𝐞𝐝 𝐭𝐡𝐞 𝐬𝐚𝐦𝐞 𝐭𝐨𝐨𝐭𝐡 𝐟𝐫𝐨𝐦 𝐚𝐧𝐨𝐭𝐡𝐞𝐫 𝐬𝐢𝐝𝐞 for example ..

Upper left Cental incisor  ----->   Upper right Cental incisor.

2- 𝐜𝐡𝐨𝐨𝐬𝐞 𝐇𝐮𝐞, 𝐰𝐡𝐢𝐜𝐡 𝟖𝟓% 𝐰𝐢𝐥𝐥 𝐛𝐞 ( A2, A3,

A3.5).

3- 𝐮𝐬𝐞 𝐃𝐞𝐧𝐭𝐚𝐥 𝐩𝐡𝐨𝐭𝐨𝐠𝐫𝐚𝐩𝐡𝐲 𝐭o 𝐨𝐛𝐭𝐚𝐢𝐧 𝐩𝐞𝐫𝐟𝐞𝐜𝐭
( intensives and characterization Details )