 
                                                                                                    25/07/2022
                                            Attrition: loss of tooth structure by mechanical forces from opposing teeth.
Abfraction: loss of tooth structure at cervical areas of teeth, due to biting forces (controversial in the dental community).
Erosion: loss of tooth structure due to chemical acids.
Abrasion: loss of tooth structure by mechanical forces from a foreign element (example tooth brush from brushing hard)                                        
 
                                                                                                     
                                         
   
   
   
   
     
   
   
  