[Prerequisites for bacterial invasion of the periodontal tissues].

Bacterial invasion of the periodontium has recently been described by several authors. The conditions necessary for this to occur in vivo are being discussed. The anatomical relations of the periodontal pocket are described macroscopically and microscopically as well as the postulated mechanisms for colonization, adhesion and penetration. It is necessary for the microorganisms to colonize and adhere in order to be able to invade tissues. The possibility of establishment of microorganisms in the tissues and the importance of the immune system are also being described. The conclusion is that there is a possibility of bacterial invasion of the periodontal connective tissue. However, the human body with help from the immune system will in most cases be able to neutralize and get rid of these microorganisms.