การเปลี่ยนแปลงตำแหน่งของฟัน โครงสร้างใบหน้าและรูปหน้าด้านข้าง ภายหลังการจัดฟันด้วยวิธีการถอนฟันและไม่ถอนฟัน ในผู้ป่วยที่มีการสบฟันผิดปกติชนิดที่ 2 แบบที่ 1 / พิชญา ไชยรักษ์ = Dentoskeletal and facial profile changes following orthodontic treatment with extraction and non-extraction in class II division 1 patients / Pitchaya Chaiyaraksa
The purpose of the study was to evaluate the skeletal, dental and facial profile changes following orthodontic treatment with extraction and non-extraction combined with cervical pulled headgear. Pretreatment and postreatment cephalograms of 95 Class II division 1 Thai patients, treated with non-extraction ( 51 patients, mean age 10.5±1.3 years) and extraction (44 patients, mean age 11.8±1.3 years), were superimposed to evaluate the dentoskeletal changes. The effect of treatment on the facial profile was determined by nasolabial angle and lower lip to E line value. Results of the study showed that there were greater significantly skeletal changes in the non-extraction group than those in the extraction group, whereas dentoalveolar changes in horizontal direction were greater in the extraction group. Cervical headgear can redirect the maxillary growth into more downward direction and enhance the mandibular growth in the forward and downward direction. Lower lip was more retracted in the extraction group. Management of Class II division 1 malocclusion was accomplished mainly by orthopedic effect in the non-extraction group and by orthodontic effect in the extraction group. Both treatment protocols had the favorable effect on the soft tissue profile.
