CD1-MIDTERMS2

1. Complexion

2. Hair color

3. Eye color

4. Age

5. Personality and activity

6. Patient desires

7. Need to educate pts.

7 guides

yellow & gray

two principal colors

HUE

- Denotes specific color produced by specific wavelength of light
- should be in harmony with pt’s skin color

SATURATION OR CHROMA

• amount of color per unit area of an object, intensity of the color

BRILLIANCE OR VALUE

- lightness or darkness of an object

TRANSLUCENCY

• the property of the object to partially allow passage of light through it

CHROMASCOP

the shade standard for the ivoclar Vivadent Product lines including IPS Empress, IPS design, composite restorative Material etc.

1. Side of the nose

2. Place the pontic under the lips with only the incisal edge exposed

3. Place the pontic under the lips with the mouth wide open and only cervical third covered

steps in selection of color

placement of ant. teeth

• tentatively established during the clinical refinement of the maxillary occlusal rim to provide adequate lips support and proper

  phonetics
  

• used to its maximum potential when

  accomplished at chairside

• has to fulfill certain baimechanical needs

• midline

• lip support

• vermillion border

• phonetics

• buccal corridor

anterior tooth placement consideration

8 - 10 mm

measurement of incisive papilla to labial of central incisor

1.5 - 2mm

horizontal and vertical overlap

1-2 mm

• incisal portion of max. central incisor below relaxed lip

ALMAGAUGE

in ant. max. the incisal length and width can be measure with the used of _____

22 mm

• incisal length average from labial sulcus

young → 8

middle → 7

old → 6

average value position for female

young → 6

middle → 5

old → 4

average value position for male

10-19 mm → 3-4mm

20-25 mm → 2mm

26-30mm → 1mm

>30mm → 0

lip length vs incisal display

young → f: +2, m: +1

middle → f: +1, m: 0

old → f: 0, m: -1

average value for sex and age

OPA ruler or PAPILLAMETER

• in determining smile line, flat end of this is placed inside mouth and up against incisal papilla

anterior teeth and tongue 

• act as part of valving mechanism which modify flow of air to produce speech mechanism

labial sounds :’p” “b”

if the lips are not supported properly by the teeth these sounds may be defective

labiodental sounds: “f” “v”

• are produced by contact between the maxillary incisors and the posterior one-third of the lower lip

linguodental sound: “th”

are produced by extending the tip of the tongue 3- 6mm beyond the incisal edges of the upper and lower anterior teeth.

linguopalatal sounds: “s”

- the “s” sound made by contact between the tip of the tongue and the palate at the rugae area with a small space for the escape of air

- if the space is too small a whistle usually resu and if the space is too broad an thin, the “s” sound is replaced by the “sh” sound which sounds like a lisp.

SQUARE TOOTH MOLDS

with this angular shape, the central incisor is dominant and the gingive-incisal curvature is moderate. The square facial shape oiers maximum light deflection and creates a bold eiect

TAPERING

Characterized by rounded contours which taper towards the cervical ridge. Moderate gingive-incisal curvature. Large triangular incisor slightly triangular in shape.

OVOID

The teeth have a pronounced gingive-incisal curvature, which tends to disperse the light reflection and create a softened appearance.

• buccolingual width

• mesiodistal length

• occlusogingival height

posterior teeth selection factors

BUCCOLINGUAL WIDTH

• should be decrease to prevent escapement of food during mastication.

• it should be such that the forces from the tongue neutralizes the forces of cheek

• increase width = increase forces to denture = increase rate of ridge resorption

• broader teeth = poor stability of denture

• broader teeth = loss of buccal corridors

MESIODISTAL LENGTH

• -  combined length of all posterior teeth does not exceed the distance between the canine and retromolar pad

• -  posterior teeth should not be placed over steep anteroposterior ridge slope -forward displacement of denture

• -  should not be placed over displaceable tissue (retromolar pad) → tipping of denture during function

• inadequate MD length →  Premolars can be omitted

OCCLUSO-GINGIVAL HEIGHT

• determined by available interarch distance

• occlusal plane should be located at the midpoint of the interocclusal distance

1. condylar inclination

2. height of residual ridge

3. patient’s age

4. ridge relationship

5. hanau’s quint

factors that control selection of form of posterior teeth 

steep

• higher cuspal angulation to produce occlusal balance

1. anatomic teeth

2. semi-anatomic teeth

CUSP TEETH

ANATOMIC TEETH

•  resemble normal newly erupted teeth

•  provide best esthetic

• 30 degree cusp angle (commonly known as

  Plikington-Turner Teeth)

SEMI-ANATOMIC TEETH

• modified cusp or low-cusp teeth

• 10degree or 20degree cuspal angulation

• funtional or anatoline teeth

•  used with mild discrepancies in jaw relation

CUSPLESS TEETH

• 0 degree

• flat

• monoplane

1. Resorbed or flabby ridges 

2. Physical condition of the patient § Patient who clench or brux

3. Previous denture occlusion

4. Ridge relationship\

5. Immediate dentures

posterior tooth selection criteria