However, dental materials are required to have high purity and be lead and arsenic-free, unlike portland cement, and dental companies created their materials to meet the dental standards (ISO 9917) for purity and performance (ISO 6876 and ADA 57).
However, dental materials are required to have high purity and be lead and arsenic-free, unlike portland cement. ProRoot ® MTA was created by DENTSPLY Tulsa Dental Specialties in 1998 as a medical grade root repair material to meet the dental standards (ISO 9917) for purity and performance (ISO 6876 and ADA 57).