Monarch Disease Ontology identifier MONDO_0016607 (odontohypophosphatasia) is a particular form of hypophosphatasia (HPP) characterized by reduced activity of unfractionated serum alkaline phosphatase, premature exfoliation of primary and/or permanent teeth and/or severe dental caries, in the absence of skeletal system abnormalities. It can inherited via either autosomal dominant or autosomal recessive inheritance. Also known as: HPPO, odonto-HPP.