2021 FEB DENTAL STUDIO with DR.JEON IN SUNG IN SEOUL
2020 SEP DENTAL STUDIO with DR.JEON IN SUNG IN SEOUL
2020 AUG DENTAL STUDIO with DR.JEON IN SUNG IN SEOUL
2020 JULY DENTAL STUDIO with DR.JEON IN SUNG IN SEOUL
2020 JULY DENTAL STUDIO with DR.JEON IN SUNG IN SEOUL
2020 JULY DENTAL STUDIO with DR.JEON IN SUNG IN WONJU
2020 JULY DENTAL STUDIO with DR.JEON IN SUNG IN DAEJEON
2020 JULY DENTAL STUDIO with DR. CHO SEUNG HWAN IN SEOUL
2020 JUNE DENTAL STUDIO with DR.JEON IN SUNG IN SEOUL
2020 JUNE DENTAL STUDIO with DR.JEON IN SUNG IN BUSAN
2020 APR SNUCON with DENTAL STUDIO IN KOREA
2019 Nov OKABE with DENTAL STUDIO IN JAPAN
2019 Nov JENITON with DENTAL STUDIO IN UKRAINE
2019 May DENTAL STUDIO SEMINAR IN VIETNAM
2019 JUNE DENTAL STUDIO SEMINAR IN KOREA
2018 Sep MEGAGEN WITH DENTAL STUDIO IN KOREA
2018 Sep DENTAL STUDIO SEMINAR IN QINGDAO
2018 Oct DENTAL STUDIO SEMINAR IN UZBEKISTAN
2018 Nov Megagen with DENTAL STUIO in Singapore
2018 Nov Megagen with DENTAL STUDIO in Malaysia
2018 Nov DENTAL STUDIO WITH PATTERSON
2018 May DENTAL STUDIO SEMIANR IN UKRAINE
2018 April KAOMI WITH DENTAL STUDIO
2017 Oct SINO DENTAL
2017 Nov DENTAL STUDIO SEMIANR IN KOREA