1. Maxillary (upper) teethPrimary teethCentralincisorLateralincisorCanineFirstmolarSecondmolarInitial calcification14 wk I.U.16 wk I.U.17 wk I.U.15.5 wk I.U.19 wk I.U.Crown completed1.5 mo2.5 mo9 mo6 mo11 moRoot completed1.5 yr2 yr3.25 yr2.5 yr3 yr Mandibular (lower) teeth Initial calcification14 wk I.U.16 wk I.U.17 wk I.U.15.5 wk I.U.18 wk I.U.Crown completed2.5 mo3 mo9 mo5.5 mo10 moRoot completed1.5 yr1.5 yr3.25 yr2.5 yr3 yr<br />Maxillary (upper) teethPermanent teethCentralincisorLateralincisorCanineFirstpremolarSecondpremolarFirstmolarSecondmolarThirdmolarInitial calcification3–4 mo10–12 mo4–5 mo1.5–1.75 yr2–2.25 yrat birth2.5–3 yr7–9 yrCrown completed4–5 yr4–5 yr6–7 yr5–6 yr6–7 yr2.5–3 yr7–8 yr12–16 yrRoot completed10 yr11 yr13–15 yr12–13 yr12–14 yr9–10 yr14–16 yr18–25 yr Mandibular (lower) teeth Initial calcification3–4 mo3–4 mo4–5 mo1.5–2 yr2.25–2.5 yrat birth2.5–3 yr8–10 yrCrown completed4–5 yr4–5 yr6–7 yr5–6 yr6–7 yr2.5–3 yr7–8 yr12–16 yrRoot completed9 yr10 yr12–14 yr12–13 yr13–14 yr9–10 yr14–15 yr18–25 yr<br />