[The periodontal findings during orthodontic treatment. A cross-sectional study].

The study was designed to evaluate the adverse influence of removable or fixed orthodontic appliances on the periodontal status of patients, thus predisposing to periodontal disease. PLI (Plaque Index), PBI (Papillary Bleeding Index), SFFR (Sulcus-Fluid-Flow-Rate) and probing depth were the parameters used to evaluate the periodontal health of the patients in the study group. The results of the investigation were: 1. There was no significant difference between wearers of removable appliances and the untreated control group. 2. Wearers of fixed orthodontic appliances showed increased values of the Papillary Bleeding Index (PBI) and the Sulcus-Fluid-Flow-Rate (SFFR) in contrast to the control group. 3. The small patient population did not allow for definite conclusions to be made on the relationship between the age of the patients and the results of the investigation. 4. The most striking observation of the study was a decreased ability to maintain oral hygiene with a consequent decline in periodontal health. Orthodontic movements however should be carried out basically on teeth with a healthy periodontium.