Many books say human teeth are only diphyodont .But premolars appear only once and one molar appears later which should be considered monophyodont.
Dental Formulae :
CHILD - 1. Incissor -2/2 2. Canine -1/1 3. Premolar-0/0 4. Molar-2/2 ADULT- 1. Incissor-2/2 2.Canine-1/1 3.Premolar-2/2 4.Molar 3/3 .
Here the 3rd molar and two premolar appear only once. Therefore human teeth should be both diphyodont and monophyodont