It takes 3-6 months for permanent premolars to erupt to occlusion.
Source: Antonson D, Imagine a World Without Occlusal Caries: Are Glass Ionomer Sealants the Answer, Oral Health, Dec 2012, Vol 102, No 12, pg 31-36.
Hans Skariah, B.Sc., DMD
Promenade Court Dental Health Group in Mississauga
2233 Hurontario St., Mississauga, ON, Canada
(1/2 km north of the QEW in the Dome Building)