Dental Veneers

I know it's  been a long time since my last post. But here I am enjoying of my first day of vacation. A long time ago I did a rotation program at school, we had to do some laboratory work for the teacher. What I did is:
1. I did a copy of a dental cast
2. I destroyed some teeth 
3. I build it up with green wax 

After recontructing the teeth, the teacher ask me to make a copy of that and prepare the case for veneers. 
At first I took a look on internet and I concluded some ideas of veneers. 

It is thin slices of porcelain that cover the buccal of the anterior teeth.
Other names:

• Porcelain laminate veneers
• Porcelain veneers
• Horn lamellae

The discoverers were:

• Buonocuore 50s
• Rochette 60s
• Bowen and Simonsen 80s

Materials:

• Conventional feldspathic porcelain (ideal, more aesthetic)
• Leucite-injecte reinforced feldspathic porcelain 
• More rigid
• Empress (representative system)
• Aluminous Porcelain processed by computer.
• CEVEC, Celay, procera.
• More resistant and opaque
• Not as much adhesion as feldspathic
• Polymers or resins

Indications:

• Color anomalies
• Amelogenesis (Although isn't the most indicated)
• tetracyclines
• Fluorosis
• stains
• Form alterations
• Microdontia
• Convert the canine into lateral incisor (agenesis)
• Abnormal structure or texture
• Dysplasia
• Abrasions
• Coronary fractures 
• Malpositions
• Rotations
• abnormal angulatio
• Diastemas

It isn't indicated in this cases:

• Inadequate Enamel (minimum 50%)
• Margins outside of the enamel
• devitalized teeth
• Small clinical crown
• Teeth with cavities or fillings
• Poor oral hygiene
• Erupting teeth
• Fractures involving more than 2/3 coronal
• Severe stains or bad habits such as:
• bruxism 
• onychophagia
• Inadequate Occlusion 
• Important Malposition 

Once we have all the necessary information, we can explain to the patient if he wants the veneers. First of all we have to do a diagnostic wax. It is like important to prepare the case. Here we have the cast copy. 

1) 3 Buccal horizontal guide grooves 0.3-0.4mm
the the TFC1 Touatti guide, TFC2 drills.

2) Vestibular reduction 
We mark with pencil to reduce not longer than desired.
Respecting the 2 planes with cylindrical cutter.
Average reduction of 0.5mm (0.7-0.8mm 0.6-0.7mm incisal and medial)
0.3mm Margin  chamfer
Reaching invisible areas without touching contact points

Final work: