General practice Flashcards
How do we look at the smile?
1.Lips – competence, colours, pigmentation of the skin, filtrum, skin pores, fine facial hair, vermillion border demarketion
2.Incisor display – how much of the teeth is shown
3.Tooth form and shade of teeth
4.Symmetry of the smile
5.Gingival condition
6.Opacity of incisal ridges
What are the three optical properties of dental sctructures?
Opalascence – the ability of the body to look different in reflected or transmitted light
Fluorescence – the ability of the body to emit light that is a wavelength less then incident radiation e.g. crime scene fluoresent lights
Translucence – the ability of the body to appear to transmit light and reflect little of it back
What are the three factors of tooth colour?
Hue – base pigment – red, pink, green, blue and other
Value – most important – quantity of light reflected – how bright is the object can be shown with black and white images
Saturation – chroma – intensity or vividness – how much of base pigment is there within tooth structure
What shade guide do we use in SADS?
Vita classical – used commonly in many aspects of dentistry – does not sit in the tooth banana nicely thus covers it inconsistently, with some fall outside of the banana, really incosistent value
Vita 3D Master Shade Guide – amazing for dentistry – sit nicely in the shade banana, amazing value when shown in black and white when going from 1-5 (5 is darkest thus lowest value) - Number 1 is value, Letter 1 is hue, Last number is chroma A3 and 3m2 is nearly the same colour. Infinitely compatible.
How to use Vita 3D master guide?
1.Select value by leaving only M hue in guide body natural light and TURN OFF YOUR LIGHTS AND GO TO THE WINDOW. Get close to the tooth.
2.Chroma is evaluated. How saturated are the teeth
3.Hue selection. Is the tooth more yellowish then middle? Is it more red??? Move from middle (M) to either R or L
4.Remember computer generator system allow you to match shade in between value ranges or chroma
What is the most aesthetic way for a incisal line to run?
You want it to run parallel to the lower lip.
What is incisal configuration?
It is the V shaped area between the incisors. It needs to be at 90 degrees to both of the teeth making up the incisal configuration
What is importance of interdental papillae?
Black triangles are bad
How can we measure incisors?
Bioclear template that utilizes the Fibonacci gold sequence.
What is a gingival zenith?
It is the line drawn at the terminus of the gingival margin at each incisors. Low gingival zenith in central and high in laterals will result in poor aesthetics. It central incisor and canine should coincide.
When do we say a person has a gummy smile?
When we see more then 3mm of gingiva past the gingival margin in a person.
What is a buccal corridor?
It is a negative space in the corners of the smile that is not filled by tooth structure. 15.-2.5 mm is ideal.
How can we construct a rough prototype for restoration?
You can you putty or isolating material like PTFE tape and old, out of date composite just to get a nice 3D, functional structure. Do not bond as you need to remove it. Check with patient. Create a clear PVS bite reg material to register the prototype restoration so you can replace with permanent one – key guide.
What is the best bonding technique?
4th generation ethc-prime-bond-composite.
What are the steps of build up?
1.Build up of palatal wall with dentine shade
2.Apply the needed maverick colours with use of bonding resin and stains. Separate the two and use with probe to dip into both and apply to the needed translucent halo area.
3.Layer with body shade
4.Layer the most superficial layer with enamel shade
