In ancient Greece, massage therapy was called the anatriptic art, which means to rub:

Amniocentesis for genetic testing: ________

Fill in the blank with correct word.

Which of the following bony defects has a lesser chance of regeneration with a bone graft or bone replacement material?

A) One-wall infrabony on the maxillary first premolar B) Three-wall infrabony on the mandibular second molar C) Class II buccal furcation of mandibular first molar D) Class II buccal furcation on the mandibular second molar