The above wont be needed and/or wont be affective for three reasons:
1) AMCAS instructions clearly state felony or misdemeanor while the OP has a non-criminal violation
https://www.aamc.org/students/download/182162/data/amcas_instruction_manual.pdf
2) Sealing a record has far too many leaks. While most records are "sealed" at a state records level, there is no uniform process in that clears previously filed information such as in a county court, DMV, etc and records will still be searched as in below link from AMCAS.
https://www.aamc.org/students/applying/amcas/how_to_apply/134178/background_check_sbs_descr.html
3) Secondary applications may ask for self-identified/self-sworn information that may include violations. You cant answer none to a question that, even if a record is sealed. While a violation is unlikely to get you barred from medical school, unethical behavior, such as not telling the truth on a statement you are signing as truthful would get you booted quickly