remove lec 3 teeth selection

Width of central incisor = 1/6 of bizygomatic width.

• true
• false

Width of the six maxillary anterior teeth is slightly more than 1/3 of the bizygomatic width

• true
• false

smile line represents the length of the mandibular anterior teeth

• true
• false

low lip line The lower edge of the maxillary occlusion rim should be 2 mm above the lip when it is at rest.

• true
• false

which of the following is the correct statement

• increase in vertical height = less teeth showing
• deep over bite = less mandibular teeth showing
• short lip = less teeth showing
• long lip =more teeth showing

the shape of central incisors that matches with a V - shaped arch is

• ovoid
• square
• tapering
• none of the above

the shape of central incisors that matches with round arch is

• ovoid
• tapering
• sqaure
• none of the above

Shape of the face is oriented with two lines, one on either side of the face, running 2.5cm in front of the ala of the nose and touching the angle of the mandible

• true
• false

concerning the two lines determining the shape of the face which of the following is not true

• -If these lines are parallel, the face is square
• If they diverge away from the chin, the face is ovoid.
• If they converge towards the chin, the face is taper
• none of the above

If the face presents a curved profile, then a tooth with flat labial surface is appropriate

• true
• false