Zirconia fixed prosthetic dentures are extensively used for replacing missing teeth. The primary objective of this systematic review was to gather and present the results of all in vitro studies and clinical trials conducted on zirconia fixed prosthetic dentures. This review concentrated exclusively on bilayered zirconia and monolithic fixed prosthetic dentures. As such this paper can act as a guideline for more comparable future experimental work on zirconia ceramics. Future studies must use a more systematic approach such as the uniform use of abutment material, material for simulating periodontal support, data about fracture strength before and after fatigue, number of cycles, information about position and size of the indenter. The new digital techniques with long-term follow-up are desirable in further clinical studies.
F.21 Development of new health/diagnostic methods/procedures
COBISS.SI-ID: 33920729Background. Tongue posture plays an important role in the etiology of anterior open bite (AOB) and articulation disorders, and is crucial for AOB treatment planning and posttreatment stability. Clinical assessment of tongue posture in children is unreliable due to anatomical limitations. The aim of the study was to present functional diagnostics using three-dimensional ultrasound (3DUS) assessment of resting tongue posture in comparison to clinical assessment, and the associations between the improper tongue posture, otorhinolaryngological characteristics, and articulation disorders in preschool children with AOB. Patients and methods. A cross-sectional study included 446 children, aged 3-7 years, 236 boys and 210 girls, ex- amined by an orthodontist to detect the prevalence of AOB. The AOB was present in 32 children. The control group consisted of 43 children randomly selected from the participants with normocclusion. An orthodontist, an ear, nose and throat (ENT) specialist and a speech therapist assessed orofacial and ENT conditions, oral habits, and articulation disorders in the AOB group and control group. Tongue posture was also assessed by an experienced radiologist, us- ing 3DUS. The 3DUS assessment of tongue posture was compared to the clinical assessment of orthodontist and ENT specialist. Results. The prevalence of AOB was 7.2%. The AOB group and the control group significantly differed regarding improper tongue posture (p ( 0.001), and articulation disorders...
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 33949913Phototherapy is a treatment with different modalities of light, such as laser, lightemitting diode (LED), halogen lights or other light sources. Photobiomodulation is a type of phototherapy. Its primary effect is not thermal, as it is mainly due to the light being absorbed within chromophores of exposed cells resulting in increased cell metabolism and improved immunologic response of the tissue. The aim of our pilot study was to elucidate how phototherapy of salivary glands with polychromatic light or LED therapeutic light reduces caries risk factors in patients with high caries risk. Hypothesis: Polarized polychromatic noncoherent light or LED phototherapy reduces caries risk in high caries risk patients Methods: In prospective randomised study with placebo 40 patients with high caries risk according to Cariogram were assigned into four groups. In experimental groups the patients were irradiated with polarized polychromatic non-coherent light Bioptron, continuous LED light Ortholumm and same LED light Ortholumm in pulsed mode. For control group non-therapeutic low power visible light was used. In all patients light was administered extraorally bilaterally on the parotid and submandibular glands for 10 minutes and intraorally on the sublingual glands for 5 minutes, 3 times a week, for 4 weeks in a row. Every patient's caries risk was assessed according to Cariogram at the start and the end of therapy. Salivary caries risk factors were determined from saliva samples before the therapy, after two weeks, at the end of treatment and 4 weeks after the end of therapy. Results: At the end of the treatment, in group, irradiated with polarised polichromatic light (N = 9), and in group, irradiated with continuous LED light (N = 8), Streptococcus mutans and Lactobacillus CFU/ml counts were reduced and buffering capacity of saliva was increased (one-way repeated measures ANOVA, Dunnett’s test, p ( 0.05). At the end of the treatment, in group, irradiated with LED light in pulsed mode (N = 7), Streptococcus mutans CFU/ml counts were reduced, unstimulated salivary flow was increased and buffering capacity of saliva was increased (one-way repeated measures ANOVA, Dunnett’s test, p ( 0.05). In all three experimental groups caries risk at the end of phototherapy was lower (Wilcoxon test, p ( 0,05). In placebo control group (N = 12) there were no statistically significant differences between parameters during and after the therapy. Conclusions: Phototherapy can reduce the amount of cariogenic bacteria in saliva and improve some salivary parameters thus diminishing the risk for new caries lesion formation. The results from our study confirm the hypothesis that phototherapy with polarized polychromatic non-cocherent light or LED light reduces caries risk factors in patients with high caries risk.
B.04 Guest lecture
COBISS.SI-ID: 527461401The study was presented at the 65th ORCA Congress. Patients with chronic obstructive pulmonary disease (COPD) have higher caries prevalence. In this study their salivary parameters were evaluated. The study population consisted of 53–83-year old COPD patients (n = 50) stage B-D according to GOLD guidelines. Fifty healthy controls were matched for age, sex, and smoking status. Measurements of dental caries, salivary flow, buffer capacity, colony densities of mutans streptococci and lactobacillus in stimulated saliva, and unstimulated salivary pH were conducted. The results showed that COPD patients had lower salivary flow, higher mutans streptococci and lactobacillus colony densities, and lower unstimulated salivary pH. These results are an important contribution to the understanding of the oral cavity environment in COPD patients.
B.06 Other
COBISS.SI-ID: 34040537Verbal communication and global personal development is determinate and enabled by appropriate hearing. Classical otosurgical techniques up to eighties in the past millennium were limited only to return partially function of outer and middle ear. Fast scientific and technical development put into clinical practice the use of implantable vibrant and electrical hearing implants. Classical otosurgery and implantation of vibrant or electric hearing implants enable to overcome almost all types and degrees of hearing loss with a goal to establish satisfactory verbal communication.
B.04 Guest lecture
COBISS.SI-ID: 33720793