Five Key Variables Affect Tooth Structure Loss During Extrinsic Tooth

Five key variables affect tooth structure loss during extrinsic tooth stain removal with a rubber cup: abrasiveness of the prophylaxis paste,quantity of abrasive agent,contact time of the rubber cup on the tooth surface,speed of the rubber cup,and pressure or force applied to the rubber cup.To preserve tooth structure and prevent damage to teeth and restorative materials,the practitioner starts with the least abrasive agent and amount of agent,with the least amount of rubber cup contact time,and with the least amount of pressure to remove the extrinsic stain.

A) Both statements are true.
B) Both statements are false.
C) The first statement is true;the second statement is false.
D) The first statement is false;the second statement is true.