See Also: periodontitis(encyclopedia)
Periodontitis(health)
Periodontitis(medicine)
suppurative periodontitis(medicine)
periodontitis, juvenile(medicine)
periodontitis simplex(medicine)
apical periodontitis(medicine)
periapical periodontitis(medicine)
periodontitis complex(medicine)
juvenile periodontitis(medicine)

Inner cell mass (health) and periodontitis (sh)


Inner cell mass (health)


The cluster of cells inside the blastocyst. Before implantation, these can give rise to embryonic stem cell lines. After implantation, the inner cell mass gives rise to all the tissues of the fetus, as well as some of the membranes around it.





periodontitis (sh)




Inflammation of soft tissues around the teeth (see tooth).

Poor dental hygiene leads to deposition of bacterial plaque on the teeth below the gum line, irritating and eroding nearby tissues. If it is not treated, the gum margin recedes, exposing the roots of the teeth. The process eventually involves the bone anchoring the teeth, which loosen and may fall out. Removal of all plaque deposits and affected soft tissues can arrest but not reverse bone deterioration.