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Dental factors affecting occlusal development Dental factors affecting occlusal development Dr. Ahmed AL-Mayali B.D.S M.Sc. Ortho. ahmed.almayali@uokufa.edu.iq Slide 2 The size of the dentition in relation to jaw size Slide 3 Dental arch crowding theories First theory Decrease jaw Primitive diet Slide 4 Soft diet Modern diet is largely responsible for crowding Slide 5 Second theory Interbreeding of people Slide 6 The effects of excessive dentition size. 1-Overlapping and displacement of teeth. Slide 7 2-Impaction of teeth Slide 8 Space closure after extraction Less in incisor More in upper jaw Primary ..28 months Permanent 39 Slide 9 The effects of early loss of primary teeth 1-Effect on function and oral health Masticatory Speech Remove infection Reduce caries Slide 10 2-Over eruption of opposing teeth Slide 11 3-Psychological effects on child and parents Slide 12 4- Effect on the position of permanent teeth Slide 13 How premature loss of primary teeth can affect the position of permanent teeth? Slide 14 A-When there is ample space in the dental arch Slide 15 B- When there is just enough space for the permanent teeth to erupt without crowding Slide 16 C- When there is slight crowding potential in the dental arch for the permanent teeth Slide 17 D- When there is severe crowding potential in the dental arch for the successional teeth Slide 18 The effects of asymmetric loss of primary teeth Slide 19 Space maintenance Space maintainer Slide 20 Types of space maintainer 1-Removable space maintainer Slide 21 2-Fixed space maintainer Slide 22 Thank you for listening