Rough Dentogram ( clustering based on segment distance )

    L311 315  
   !  
   6-- H307 310  
   !     
   !      E299 300  
   !     !  
   !     4-- E290 291  
   !     !     
   !     5----- L301 306  
   !     !        
   7-----3-------- L292 298  
   !                 
   !                  L279 288  
   !                 !  
   2-----------------1-- H274 278  
   !                       
   8----------------------- H316 327  
  /
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