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Background/Aim. Mandibular prognathism (MPG) is a severe form of facial and jaw deformity. This kind of anomaly usually requires combined orthodontic-surgical treatment. The aim of this study was to determine the changes in the craniofacial complex after orthodontic-surgical treatment of patients with MPG by analyzing the cephalometric parameters on tele-radiography images before and after treatment. Methods. The study included a sample of 40 subjects (mean age 24.1 ± 4.1 years) who underwent orthodontic-surgical treatment of MPG. Vertical and sagittal parameters which characterize MPG were measured on profile teleradiography images before and 12 months after treatment. Based on the analysis of cephalometric parameters on preoperative and postoperative teleradiography images, dental and skeletal changes that occurred after treatment were determined. Results. After the end of the treatment, most of the parameter values that characterize MPG were significantly reduced. A drop in values was noted in the following parameters: SNB, SNPg, NS/SpP, NS/MP, SpP/MP, NSAr, ArGoMe, Bjork polygon, NMe, NSna, SnaMe, SSnp, I/SpP. There was a statistically significant increase in the values of the following parameters SNA, ANB, GoArNS, SGo and i/MP. No significant changes in values were recorded on the OP/NS and SArGo parameters. Conclusion. Orthodontic-surgical treatment of MPG leads to changes in the bone and dental structures of the craniofacial system. As a result of such treatment, there is a functional improvement and an improvement in the appearance of the face.

Background/Aim. Mandibular prognathism, as one of the more severe forms of dentofacial deformities, impairs the oral functions and appearance of the patient’s face and represents a psychosocial handicap with a negative impact on the quality of life (QoL). The aim of the study was to assess the impact of orthodontic-surgical (OS) treatment on the QoL of patients with mandibular prognathism. Methods. The study involved 40 patients (19 men and 21 women, with a mean age of 24.1 ± 4.1 years) who underwent the OS treatment for mandibular prognathism. All patients completed two questionnaires – the Oral Health Impact Profile (OHIP-14) and the Orthognathic Quality of Life Questionnaire (OQLQ), be-fore the start of treatment and 12 months after the completion of treatment. Results. The results of both questionnaires showed an improvement in the QoL compared to the condition before the treatment. According to the OQLQ questionnaire, there was a postoperative improvement in the QoL (score 24.8 ± 12.9) compared to the preoperative period (score 51.3 ± 15.2). According to the results of the OHIP-14 questionnaire, there was a postoperative improvement in the QoL (score 11.3 ± 2.9) compared to the preoperative period (score 20.8 ± 6.9). The improvement of the QoL, 12 months after the treatment, occurred in all life segments, measured by both questionnaires. Conclusion. OS treatment of mandibular prognathism improves all oral functions, including the appearance of the patient’s face, thus improving the QoL.

Background/Aim. Periodontal tissue maintenance therapy is an important phase of the overall periodontal disease therapy. This paper aims to determine subgingival air-polishing efficacy with glycine powder in putative paropathogens reduction, plaque index, gingival bleeding index and probing depth. Methods. The study included 44 patients with aggressive periodontitis of both sexes, aged between 21 and 50, divided into two groups. Subgingival air-polishing was applied in the first group and sonic scaling in the control (second) group. Biofilm samples were taken from 5 deepest periodontal pockets before the therapy and 3 and 15 months after it. Paropathogens Aggreggatibacter actinomy-cetemcomitans, Porphyromonas gingivalis, Tannerella forsithya, Prevotella intermedia, Treponema denticola were detected by PCR analysis. Results. Paropathogens values were decreased after applied treatments. There was a statistically significant reduction in the mean value of full-mouth plaque (FMPS), from 43.00 to 14.90 (first group) and from 44.71 to 15.54 (second group), full-mouth bleeding score (FMBS) from 42.55 to 13.85 (first group) and from 43.04 to 15.17 (second group), as well as in probing depth from 3.40 to 2.64 (first group) and from 3.85 to 2.91 (second group), three months after the therapy. Conclusion. Subgingival air-polishing successfully reduces putative paropathogens and clinical parameters three months after the treatment.