Section I general introduction ● Definition ● Epidemiology ● Classification History and examination
Section Ⅰ : general introduction ⚫ Definition ⚫ Epidemiology ⚫ Classification ⚫ History and examination
1.1 Definition severe trauma hit dental trauma knock hard tissue dental Pulp periodontium
1.1 Definition severe trauma dental trauma hard tissue dental Pulp periodontium hit knock
1.2 Epidemiology Table 1 Dental trauma incidence in childhood and adolescence Incidence Primary dentition Permanent dentition Predilection ages 1-2 years 7-9 years Account for ratio 50% 50-70%
Table 1 Dental trauma incidence in childhood and adolescence Incidence Primary dentition Permanent dentition Predilection ages 1-2 years 7-9 years Account for ratio 50% 50-70% 1.2 Epidemiology
Table 2 Clinical comparison to the Primary and Permanent dentition Primary dentition trauma Permanent dentition trauma Displacement is common Tooth fracture is common Intrusion Maturation of root: Extrusion crown fracture or root fracture Displacement Immaturation of root: Mobility,displacement ,extrusion Account for 80% Account for 40-60%
Table 2 Clinical comparison to the Primary and Permanent dentition Primary dentition trauma Permanent dentition trauma Displacement is common Tooth fracture is common Intrusion Extrusion Displacement Maturation of root: crown fracture or root fracture Immaturation of root: Mobility,displacement ,extrusion Account for 80% Account for 40-60%
1.3 Classification Classification Andreasen WHO Li hong yi
Classification Andreasen WHO Li hong yi 1.3 Classification