下列何者是造成齒顏面畸形 (dentofacial deformity) 的原因？①外傷 (trauma) ②胚胎發育之干擾(disturbances in embryologic development) ③遺傳 (genetic influences) ④牙齒發育之干擾 (disturbances in dental development)
①②③
①②④
②③④
①③④
