CLASS 1 This   classification   is   for   patients   who   do   not require   dental   treatment   or   reevaluation   within   12 months. Class 1 patients must meet these conditions: No dental caries or defective restorations. Arrested   caries   for   which   treatment   is   not indicated. Healthy periodontium, no bleeding on probing; oral prophylaxis not indicated. Replacement of missing teeth not indicated. Unerupted, partially erupted, or malposed teeth that   are   without   historical,   clinical,   or radiographic signs or symptoms of pathosis and are  not  recommended  for  prophylactic (preventive) removal. Absence  of  temporomandibular  disorders; stable  occlusion. CLASS 2 Class 2 is the classification for patients who have oral conditions that the examining dentist feels if not treated or followed up, have the potential but are not expected  to  result  in  dental  emergencies  within  12 months. CLASS 3 Class 3 is the classification for patients who have oral conditions that the examining dentist expects will result  in  dental  emergencies  within  12  months  if  not treated. Patients should be placed in class 3 when there are  questions  in  determining  classification  between class 2 and class 3. CLASS 4 Class  4  is  the  classification  for  patients  who require  a  dental  examination.  This  includes  patients who   require   annual   or   other   required   dental examinations and patients whose dental classifications are unknown. DESIGNATIONS,  CHARTING,  AND ABBREVIATIONS The designations and abbreviations are to be used when making entries in a patient's EZ603 or EZ603A (dental  continuation  sheet).  The  names  of  permanent and deciduous teeth and numbers that correspond with them  have  been  discussed  in  Dental  Technician, Volume 1, chapter 4. TOOTH  SURFACES The  following  designation  of  tooth  surfaces  are used  to  record  pathologic  conditions  and  subsequent restoration of teeth: Surface Designation Facial (labial and buccal) F Lingual L Occlusal Mesial O M Distal Incisal D I Combinations of the designations must be used to identify  and  locate  caries,  and  to  record  treatment plans, operations, or restorations in the teeth involved; for example, 8-MID would refer to the mesial, incisal, and distal aspects of a right maxillary central incisor; 22-DF, the distal and facial aspects of a left mandibular cuspid; and 30-MODF, the mesial, occlusal, distal, and facial aspects of a right mandibular first molar. GENERAL  CHARTING As  a  Dental  Technician,  a  large  portion  of  your time  during  an  examination  involves  recording existing   restorations   and   current   diseases   and abnormalities in the patient’s dental records. You must fully  understand  how  and  where  to  record  this information.   Dental   chart   markings   have   been standardized so the original dental condition, diseases and  abnormalities  (treatment  needed),  and  treatments completed  may  be  identified.  This  assists  in  efficient continuity  of  treatment  and  may  establish identification in certain circumstances. STANDARD  ABBREVIATIONS  AND ACRONYMS The use of standard abbreviations and acronyms is not   mandatory,   but   it   is   desirable   for   expediency. Dental  forms  used  to  record  dental  treatment  have limited  amounts  of  space  to  write  on.  Use  only abbreviations   and   acronyms   that   will   not   be misinterpreted.   When   you   record   treatment,   ensure you correctly spell all terms. Well known medical and scientific  signs  and  symbols  such  as:  Rx  (prescription), 2-6