头帽、颏兜牵引矫治器的适应症是（）<br>A:安氏Ⅲ类错<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" />、下颌轻度发育过度且下颌可后退至前牙对刃<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" /><br>B:安氏Ⅲ类、低角短面型、无明显颞下颌关节症状、下前牙位置正常或唇向者<br>C:下颌发育过度的前牙反<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" />纠正后的保持手段<br>D:成人骨性下颌前突外科正畸后的保持器<br>E:安氏Ⅲ类错<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" />、下前牙过度舌倾、下颌前突反<img src="/Image1/ff/ff58e141a246beb7c4df5f2f2af7ed58.jpg" />者