Search

Introduction: The comparison of tissue quality and its restoration after contact, and non-contact Er: YAG (2940 nm) laser radiation ablation was evaluated. Methods: Laser setting for contact ablation was 250 mJ/pulse, pulse repetition rate 15 Hz, average power 3.75 W. For non-contact ablation these values were: 600 mJ/pulse, 6 Hz, 3.6 W. Structure of enamel and dentin after laser ablation was analyzed in scanning electron microscope. All cavities were filled by sonic-activated composite resin. Chemical and mechanical bond was observed in scanning electron microscope.Microleakage was assessed quantitatively by the degree of methylene blue dye penetration. Fischer exact test (p < 0.05) was used for statistical evaluation. Results: Contact and non-contact laser treatments prepared similar cavities (5167.31 μm versus 5356.31 μm). Defocusing of non-contact therapy has direct influence on the dye penetration microleakage presence (481.19 μm versus 611.94 μm) but this increase was not statistical significant. Conclusion: Cavity prepared by contact mode with sonic-activated composite filling protects microleakage formation.

Introduction: Plaster casts present golden standard in keeping patients data in 3D. The aim of this work was (1) to compare linear measurements made on traditional plaster casts and 3D printed copies of dental plaster casts, (2) to find new possibilities of reconstruction of digital data, its reliability based on various criteria and (3) to determine whether 3D printed copies obtained using open source system RepRap can replace traditional plaster casts in dental practice. Material and methods: 10 dental plaster casts from the Orthodontic department, Department of stomatology for children and adults, 2nd Faculty of medicine, Charles University Prague, Czech Republic were scanned by inEos Blue scanner and printed on 3D printer RepRap. Linear measurements between selected points on the dental arches of upper and lower jaws on plaster casts and their 3D copies were recorded and statistically analyzed. Results: Use of 3D printed copies has many advantages over use of traditional plaster casts, mainly mechanical durability and keeping the data in digital form unless needed for example for forensic reasons. The precision and accuracy of the RepRap 3D printed copies of plaster casts were confirmed based on the statistical analysis. Our study proved that 3D printed copies can replace traditional plaster casts and it is possible to use them for detailed analysis.

Aim of Review: The purpose of this paper is to present a comprehensive overview of views on the treatment in patients with cleft lip and palate (CLP), primary lip repair, lip reconstruction in the neonatal period, including knowledge of fetal tissue healing. Background: Authors try to summarize the principles of stomato-orthodontic follow-up care. Orofacial clefts are the most common congenital developmental defects. Based on the statistical data, the mean incidence of all types of cleft defects in the orofacial area is 1.86 per 1000 live-born children Etiology is multifactorial. With respect to the range of the defect, the cooperation of a number of experts is required, and complicated and long-lasting therapies are necessary, especially for successful jaw growth. It is necessary to postpone a definitive solution to that time when the arches are in the growth phase. The multidisciplinary therapy involves the following disciplines: plastic surgery, orthodontics, speech pathology, psychology, otorhinolaryngology, genetics, pediatrics, and social work. Due to the extent of affliction, interdisciplinary co-operation is necessary and usually complicated and long-term therapy, which is needed especially for gradual growth of the jaw bones. Therefore, the final solution has to be postponed to a time when the arches are not in a growth period. The treatment should be initiated with a surgical lip correction (usually in the 3rd month of age of a child or fetal healing can be used) and later with a correction of the palate (between the 1st - 4th years of age). It should be followed by orthodontic therapy that optimally achieves correction (e.g. in an isolated palate cleft) but a final prosthetic solution is needed more often (especially in complex clefts). A favorable shape and size of the dental arches without anomalies is an important factor for the prosthetic phase. A cleft defect often means that some teeth are missing (lateral incisors, more often premolars) and there may be other orthodontic anomalies which include either crossed occlusion, inverse occlusion in the frontal part or various anomalies of a tooth position (inclination, rotation, etc.). Early prosthetic therapy (usually around 18 years of age) including implant insertion finalized treatment.