Rough Dentogram ( clustering based on segment distance )

   AL 50  58  
   !  
   8--AL 41  49  
   !     
   !     AE 30  31  
   !     !  
   !     5--AE 21  23  
   !     !     
   !     9-----AE 59  61  
   !     !        
   !     4--------AL 24  29  
   !     !           
   7-----6-----------AH 32  40  
   !                    
   !                    AL 16  20  
   !                    !  
   !                    2--AH 12  15  
   !                    !     
   3--------------------1-----AL  1   9  
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