Impactación y retención dental: tratamiento ortodóncico y quirúrgico

Professor of Orthodontics at the University of Cartagena, Colombia. 

Visiting Professor at the University of São Paulo, Brazil. 

Lecturer's main topic of ​​interest: treatment of impaction and gingival smile.

Learn more about Patricia Vergara:

• Instagram Profile 
• Facebook Page 
• ResearchGate Profile 

Dr. Chris Chang is the founder of Beethoven Orthodontic Center and Newton’s A Inc. in Hsinchu, Taiwan. He received his PhD in Bone Physiology and Certificate in Orthodontics from Indiana University. He is a diplomate of the American Board of Orthodontics and an active member of Angle Society-Midwest. Dr. Chang is the publisher of JDO and has authored and co-authored many orthodontic books, including Orthodontics Vols. 1-6, as well as Words of Wisdom, Jobsology and Trumpology. He is the inventor of OrthoBoneScrews (OBS).

Learn more about Chris Chang:

• Instagram Profile 
• Facebook Page 
• Official Website 
• YouTube Channel 
• Interview on PubMed Central 

Member of Italian Board of Orthodontics (I.B.O.), Member of European Board of Orthodontists (E.B.O.), Active Member of Italian Society of Orthodontics (S.I.D.O.), Active Member of Italian Academy of Orthodontics (A.I.d.Or.), Active Member of European Orthodontic Society (E.O.S.), Active Member of World Federation of Orthodontists (W.F.O.), Member of European Aligner Society (E.A.S.), 

Past-President (2013-15) of the Italian Society of Bidimensional Technique (S.I.Te.Bi), Past President (2013) of the Italian Association of Orthodontists Specialist (A.S.I.O.),

International Clinical Speaker Invisalign (2013). Author of scientific papers on national and international journals, speaker at nationals and international courses and meetings.