Difference Between Materia Alba And Plaque

What Is The Difference Between Materia Alba And Plaque

Question 1. Write short note on modes of attachment of calculus to tooth surface.
Answer. Following are the modes of attachment of calculus to tooth surface:

• Attachment by means of an organic pellicle or cuticle that seems to predominate on the enamel but occurs infrequently on cementum.
• Mechanical interlocking in surface irregularities such as resorption lacunae and caries
• Penetration of calculus bacteria in cementum.
• Close adaptation of calculus under surface depressions to the gently sloping mounts of unaltered cementum surface.

Question 2. Write the differences between supragingival and subgingival calculus.
Answer.

 

Question 3. Define and differentiate plaque, calculus and materia alba.
Answer.