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Similaire à For deciduous teeth it is called the
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For deciduous teeth it is called the
- 1. For deciduous teeth it is calledthe“4plus rule” andthe“lower before upper rule”. The “4 plus rule” is shown below: Deciduous Teeth Eruption Dates First Incisor (a) 7 months Second Incisor (b) 11 months First Molar (d) 15 months Canine (c) 19 months Second Molar 23 months As you can see it is pretty simple. You start from 7 months and add 4 to get the next eruption date and you keep adding 4. There is a slight twist that the first deciduous molar comes before the deciduous canine but no biggie. The “lower before upper rule” is exactly that the lower teeth erupt usually 1-2 months before the upper teeth. Simple. Permanentdentition: 6 yr molarsand lowercentralseruptat....duh6 years. Upper centralsaround6.5-7 years. Lowerlateralsaround7-8 years. Upper lateralsaround8-9 years. For the rest justremember: Upper goes1 PM, 2 PM, Canine. Lowergoesin order:Canine,1PM, 2 PM. These happenaround10-12 yearsold. Lowercanine can go around9 years. Mandibular 1st Molar 6-7 years Maxillary 1st Molar 6-7 years Mandibular Central incisors 6-7 years Mandibular lateral incisors 7-8 years Maxillary Central Incisors 7-8 years Maxillary Lateral Incisors 8-9 years Mandibular Canine 9-10 years Mandibular 1st Premolar10-11 years Maxillary 1st Premolar 10-11 years Mandibular 2nd premolar 11-12 years Maxillary 2nd premolar 11-12 years Maxillary Canine 11-12 years Mandibular Second Molar 11-13 years Maxillary 2nd molars 12-13 years Mandibular 3rd Molar 17-21 years Maxillary 3rd Molar 17-21 years