- MOUNTAIN PASS CONCEPT :given by Kronfeld in 1939
- To understand the close relationship between pulp and peridontium
- Kronfeld likened the bacteria in an infected root canal to an army of enemies entrenched behind high inaccessible mountains.
the army tries to descend through a mountain pass(the apical foramen)to invade the plains beyond the pass
(the periodontal and surrounding tissue)
Another army in the plains controls the paas
Having constructed trenches and fortifications(granulation
The defending army represents the WBC's and other cells of the granulation tissue
-Naturally the soldiers of the defending army are grouped around the opening of the pass which the enemy is trying to conquer(this is analogous to the accumulation of the WBC's near the opening of apical foramen)
-Nothing may happen for a long time
-Occasionally some soldiers of the mountain army(bacteria) descend through the pass(apical foramen) , but they are usually captured and destroyed by the defenders(blood cells)
-At a certain point however, the army of mountain soldiers mounts a massive attack and the battle begins.
-Such a battle between invasive bacteria and the tissues of the organism is clinically manifested as acute inflammation.
-The outcome of the battle may vary .The bacteria may win and invade the plains (clinically manifested as acute alveolar abscess or even septicemia.)
- On the other hand , the defenders -the WBC's may win.
-If the mountain army (the bacteria ) are eliminated either by extraction of the tooth or sterilization of the root canal, the defending army is no longer necessary and is thus withdrawn (apical granulation tissue disappears after extraction of infected tooth or following root canal therapy )
the army tries to descend through a mountain pass(the apical foramen)to invade the plains beyond the pass (the periodontal and surrounding tissue)
Another army in the plains controls the paas
Having constructed trenches and fortifications(granulation
The defending army represents the WBC's and other cells of the granulation tissue
-Naturally the soldiers of the defending army are grouped around the opening of the pass which the enemy is trying to conquer(this is analogous to the accumulation of the WBC's near the opening of apical foramen)
-Nothing may happen for a long time
-Occasionally some soldiers of the mountain army(bacteria) descend through the pass(apical foramen) , but they are usually captured and destroyed by the defenders(blood cells)
-At a certain point however, the army of mountain soldiers mounts a massive attack and the battle begins.
-Such a battle between invasive bacteria and the tissues of the organism is clinically manifested as acute inflammation.
-The outcome of the battle may vary .The bacteria may win and invade the plains (clinically manifested as acute alveolar abscess or even septicemia.)
- On the other hand , the defenders -the WBC's may win.
-If the mountain army (the bacteria ) are eliminated either by extraction of the tooth or sterilization of the root canal, the defending army is no longer necessary and is thus withdrawn (apical granulation tissue disappears after extraction of infected tooth or following root canal therapy )
such a simple and beautiful explaination. thank u
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