无托槽隐形矫治技术与传统固定矫治技术对患者牙周健康影响的对比研究
무탁조은형교치기술여전통고정교치기술대환자아주건강영향적대비연구
Comparison of periodontal health of patients during treatment with the invisalign system and with fixed orthodontic appliance
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