38.手用切削器械(hand instrument)應用四位數系統(four number formula)命名主要是因為
下列何種原因?
(A)刀刃(blade)與柄(handle)有雙重彎角
(B)切削面(cutting edge of the blade)與刀刃不垂直
(C)區別近遠心使用
(D)刀刃有弧度
53.有關被動萌牙(passive eruption)之敘述,下列何者正確?
(A)Exposure of the tooth by apical migration of the gingiva
(B)Movement of the tooth in the direction of the occlusal plane
(C)More clinical crown exposure with displacement of tooth
(D)Through periodontal ligament contraction
35.布拉克氏(Black's)第三類窩洞修形的面舌切緣點角(faciolinguoincisal point angle),又稱
為:
(A)髓面切緣點角(pulpoincisal point angle)
(B)軸向切緣點角(axioincisal point angle)
(C)軸向髓面點角(axiopulpal point angle)
(D)窩洞切緣點角(cavoincisal point angle)
36.牙本質與樹脂黏著強度與下列何者成正比?
(A)牙本質小管的管徑(diameter of dentin tubule)
(B)管周牙本質的厚度(thickness of peritubular dentin)
(C)管間牙本質的面積(area of intertubular dentin)
(D)牙本質小管的通透性(permeability of dentin tubule)
51.關於互補色在牙科美學的應用,下列何者錯誤?
(A)填補時加入紫色顏色改良劑(violet color modifier),可以淡化牙齒本身的黃色
(B)填補時加入紫色與灰色顏色改良劑混合物(mixture of gray and violet color modifier),可以增加齒頸部的半
透明度(translucency)
(C)填補時加入紫色顏色改良劑(violet color modifier),可以增加明亮度(brightness)
(D)視覺疲勞時會降低對黃橘色的敏感度