1 (e) Hermetically sealed foods are to have been processed in commercial food processing establishments meeting requirements of section 14-1.21 of this Subpart. 2  The use of home-canned foods in food service establishments is prohibited.
What causes tooth root resorption? A: A study on external root resorption in the journal Schweiz Monatsschr Zahnmed states that trauma, periodontitis, orthodontic treatment, internal bleaching, cysts, tumors or stimuli from a necrotic dental pulp may cause tooth root resorption.
Other causes for a tooth to become necrotic and abscess are (1) a blow to a tooth, (2) dental treatment such as a crown or a filling that gets too close to the pulp chamber, or (3) trauma to a tooth from grinding or clenching.