There are various types of Board Certification...
Although Board Certification from the American Board of Medical Specialties (ABMS) is critical, a new measurement of competency known as Maintenance of Certification (MOC) now exists. It is very important that your physician participate with this program, as it documents he or she is committed to lifelong learning and competency.
Although many plastic surgeons are indeed board certified, they might possess only lifetime certificates; which ironically require no further maintainance whatsoever.
However, many dedicated plastic surgeons (including Dr Zbar) are now doing MOC. Every three years, these surgeons document continuing education and are subject to rigorous testing; thus maintaining their skills in the field.