What's the difference between DNA appliance and Homeoblock?

BOTH ARE EXCELLENT FUNCTIONAL APPLIANCES.  I utilize DNA Appliance and Epigenetic orthopedics and Alf but the DNA Appliance is my preferred treatment due to predictable results.  I did hve one patient who did not experience growth but she wore the appliance only half of ideal time daily.  
I find the DNA Appliance to be very predictable and safe in regards to 3 dimensional expansion.
Ira L Shapira DDS, D,ABDSM, D,AAPM, FICCMO
Past Chair, Alliance of TMD Organizations
Diplomat,  Academy of Integrative Pain Management
Diplomate, American Board of Dental Sleep Medicine
Regent & Fellow, International College of CranioMandibular Orthopedics
Board Eligible, American Academy of CranioFacial Pain
Dental Section Editor, Sleep & Health JournalMember Cranio Editorial Board, Journal of Craniomandibular and Sleep Practice
Member, American Equilibration Society
Member, Academy of Applied Myofunctional SciencesMember, Academy of Cosmetic DentistryLife Member, American Dental AssociationThink Better Life ..... websiteThink Better Life youtube has over 100 testimonial videos.