單項選擇題Begg矯治技術Ⅱ類牽引力是()
A.>500g
B.300~500g
C.200~300g
D.60g
E.150g
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1.單項選擇題
我國遺傳因素占錯畸形的()
A.29.4%
B.91.2%
C.90%
D.50%
E.25%
2.單項選擇題固定矯治時釉質(zhì)脫礦發(fā)病率為()
A.29.4%
B.91.2%
C.90%
D.50%
E.25%
3.單項選擇題
口腔不良習慣占各類錯畸形的()
A.29.4%
B.91.2%
C.90%
D.50%
E.25%
4.單項選擇題6歲時神經(jīng)系統(tǒng)發(fā)育達到()
A.29.4%
B.91.2%
C.90%
D.50%
E.25%
5.單項選擇題
1955年毛燮均教授等以理想為標準調(diào)查統(tǒng)計錯患病為率()
A.29.4%
B.91.2%
C.90%
D.50%
E.25%
6.單項選擇題
骨性Ⅲ錯ANB角為()
A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°
7.單項選擇題新生兒下頜角為()
A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°
8.單項選擇題成人下頜角為()
A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°
9.單項選擇題3歲時下頜角為()
A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°
10.單項選擇題12歲時下頜角為()
A.140°~160°
B.130°~140°
C.120°~125°
D.125°
E.<0°