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Table 1 Incidences of TMJ clicking among six age groups

From: Longitudinal course of temporomandibular joint sounds in Japanese children and adolescents

Group

No.

1987

1988

1989

 

1990

 

1991

 

1992

 
 

2

     

    
 

6

 

   

   

 

G1

7

      

 

  
 

10

     

    
 

12

    

 
 

13

      

    
 

18

 

    

G2

21

     

     
 

23

     

  

  
 

24

     

     
 

25

     

     
 

27

     

    
 

30

 

      

  

G3

31

  

 

 
 

32

 

    

    
 

33

          
 

34

          
 

37

          
 

38

          

 

39

  

  

    

G4

40

     

     
 

42

      

  

 
 

46

    

 

47

 

        

G5

49

      

    
 

59

 

 

 

60

 

   

G6

65

 

      
 

67

          

 

68

    

      
  1. G1: group of subjects aged 5 years old at beginning of observation; G2: group of subjects aged 6 years old; G3: group of subjects aged 7 years old; G4: group of subjects aged 8 years old; G5: group of subjects aged 9byears old and G6: group of subjects aged 10 years old. The examinations were performed twice each year except in 1987 and 1989 (only one examination was performed in each these years). No.: Subject number; □: Clicking; ■: Crepitation.