## Permanent Dentition Eruption Sequence **Key Point:** The **third molars (wisdom teeth)** erupt latest in the permanent dentition sequence, typically between **17–25 years of age** (or even later). ### Eruption Timeline of Permanent Teeth | Tooth Type | Typical Eruption Age (years) | |---|---| | Central incisors | 6–7 | | Lateral incisors | 7–8 | | Canines | 9–10 | | First premolars | 10–11 | | Second premolars | 11–12 | | First molars | 6–7 | | Second molars | 12–13 | | **Third molars** | **17–25** | ### Forensic Significance **High-Yield:** The eruption status of third molars is a critical age estimation tool in forensic medicine. Absence of third molars in an individual aged 18+ years suggests either: - Congenital absence (agenesis) - Impaction - Delayed eruption (normal variant) **Mnemonic:** **"MOPEDS"** — Molars, Premolars, Incisors, Canines, Eruption Sequence (though third molars are the exception, erupting last). ### Clinical Pearl Third molars show the greatest individual variation in eruption timing and are often the last permanent teeth to erupt, making them valuable for distinguishing individuals in the late teenage to early adult age range (17–25 years).
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