• Klíčová slova
• bite force, bone, dental bridge, fatigue, finite element method,
• Publikační typ
• časopisecké články MeSH

• Klíčová slova
• coefficient of friction, dental implant, finite element method, insertion torque, preload,
• MeSH
• analýza metodou konečných prvků MeSH
• chemické modely MeSH
• lidé MeSH
• počítačová simulace MeSH
• povrchové vlastnosti MeSH
• tření * MeSH
• zubní implantáty * MeSH
• zubní materiály chemie   MeSH
• zubní protéza - design MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• zubní implantáty * MeSH
• zubní materiály MeSH

OBJECTIVE: To analyse the dimensions of interantral bone available for dental implant placement in the fully edentulous maxilla. METHODS: Interantral bone height (IBH) was measured using panoramic radiography and computed tomography (CT). Interantral bone width (IBW) was measured by means of CT. RESULTS: The difference between both imaging methods in IBH assessment was highly statistically significant (p < 0.001) in the canine area, whereas in other areas it was found not to be significant. Measured in the CT scans, bone is significantly higher in the canine area compared to the area of central and lateral incisors (p < 0.001). Significant variations in IBW were found in all three locations: bone in the central incisor area is the widest, in the area of the lateral incisor, the narrowest (p < 0.001). CONCLUSIONS: Panoramic radiography is a sufficiently accurate method for IBH imaging in the incisor area, but not in the canine area.

OBJETIVO:: Analizar las dimensiones del hueso interantral disponible para la colocación de implantes dentales en el maxilar completamente desdentado. MÉTODOS:: Se midió la altura del hueso interantral (IBH) utilizando radiografía panorámica (ortopantomografía) y tomografía computarizada (TC). Se midió el ancho del hueso interantral (IBW) por medio de la tomografía. RESULTADOS:: La diferencia entre ambos métodos de imagen en la evaluación del IBH fue altamente significativa estadísticamente (p < 0.001) en el área canina, mientras que en otras áreas no lo fue. Medido en escaneos TC, el hueso es significativamente mayor en el área canina, en comparación con el área de los incisivos centrales y laterales (p < 0.001). Se encontraron variaciones significativas en el ancho del hueso (IBW) en las tres zonas; el hueso en el área de los incisivos centrales tiene su parte más ancha; en la zona de los incisivos laterales, la más estrecha (p < 0.001). CONCLUSIÓN:: La radiografía panorámica es un método lo suficientemente preciso para obtener imágenes de IBH en el área de los incisivos, pero no en el área de los caninos.

• Publikační typ
• časopisecké články MeSH

• MeSH
• koroze * MeSH
• nikl chemie   MeSH
• stenty MeSH
• teplota * MeSH
• titan chemie   MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• nikl MeSH
• titan MeSH

Subantral augmentation (sinus lift) is used to increase alveolar bone mass of lateral maxilla in order to insert dental implants. In addition to the autogenous bone several foreign materials can be used for augmentation and they can replace the autogenous bone to some extent. Histological findings in specimens taken nine months after augmentation with the autogenous bone, deproteinised bovine bone (Bio-Oss) and beta-tricalcium phosphate (Cerasorb) are presented. In all cases a new bone formation around the augmentation material was seen. The new bone was deposited predominantly on its surface. In cases with Cerasorb the new bone formation was observed within the porous granules, too. From the obtained results it can be concluded, that the main osteogenetic mechanism in the examined augmentation materials was osteoconduction. The biocompatibility of the used augmentation materials was evidenced by an absence of giant cell granulomatous reaction and of marked inflammatory infiltrate.

• MeSH
• augmentace alveolárního výběžku * MeSH
• biokompatibilní materiály MeSH
• dospělí MeSH
• fosforečnany vápenaté MeSH
• implantace zubů MeSH
• kostní náhrady * MeSH
• lidé středního věku MeSH
• lidé MeSH
• minerály MeSH
• osteogeneze * MeSH
• processus alveolaris patologie   MeSH
• senioři MeSH
• sinus maxillaris * MeSH
• transplantace kostí * MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• anglický abstrakt MeSH
• časopisecké články MeSH
• Názvy látek
• beta-tricalcium phosphate MeSH Prohlížeč
• Bio-Oss MeSH Prohlížeč
• biokompatibilní materiály MeSH
• fosforečnany vápenaté MeSH
• kostní náhrady * MeSH
• minerály MeSH

During the sinus lift procedure, undesirable perforations of the Schneiderian membrane can occur in up to 58% of cases. Several methods for their closing exist. This article presents a method of covering the perforation with a strip of oxidized regenerated cellulose (Surgicel). One or two layers of material swell after being saturated with blood, turning into a gelatinous mass and forming a tight and mechanically resistant seal. This simple method has been successfully tested on 223 perforations of the Schneiderian membrane that occurred over a period of 58 months.

• MeSH
• celulosa oxidovaná aplikace a dávkování   MeSH
• endoseální implantace zubů metody   MeSH
• lidé MeSH
• sinus maxillaris zranění   chirurgie   MeSH
• studie proveditelnosti MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• celulosa oxidovaná MeSH
• Surgicel MeSH Prohlížeč

BACKGROUND: The effect of hydroxyapatite coating of dental implants is controversial. The long-term fate of hydroxyapatite-coated implants has been the subject of some criticism. PURPOSE: The aim of this retrospective study was to assess the clinical outcome of hydroxyapatite-coated cylindrical root-form endosseous Impladent dental implants (LASAK Ltd, Prague, Czech Republic) during a six-year course. METHODS: Three-hundred and ninety-one consecutively placed implants were used in 169 patients and followed for four to six years. Interval and cumulative success of implants and prostheses survival was tabulated. Marginal bone loss was measured RESULTS: Of the total number of implants, 98.5% achieved initial osseointegration. The cumulative success was 98.3% after one year, 97.0% after three years, 92.8% after five years and 90.4% after six years. The prostheses survival at the end of the study was 100% for fixed bridges totally supported by implants, 96.5% for fixed bridges with combined implant and tooth support, 94.2% for single crowns, 90.9% for mandibular overdentures and 81.3% for maxillary overdentures. Marginal bone loss averaged 2.4 +/- 0.8 mm at the end of five years. CONCLUSION: The success rate of the investigated hydroxyapatite-coated implants was comparable with the data presented in the literature and with the results of the similar implants without hydroxyapatite-coating. However, the marginal bone loss was of interest. Longer monitoring of the implants is necessary.

• MeSH
• biokompatibilní potahované materiály * MeSH
• časové faktory MeSH
• endoseální endodontická implantace zubů * škodlivé účinky   přístrojové vybavení   MeSH
• hydroxyapatit * MeSH
• lidé středního věku MeSH
• lidé MeSH
• osteointegrace * MeSH
• resorpce alveolární kosti etiologie   MeSH
• retrospektivní studie MeSH
• výsledek terapie MeSH
• zubní implantáty * škodlivé účinky   MeSH
• zubní náhrada ve spojení s implantáty * škodlivé účinky   přístrojové vybavení   MeSH
• zubní protéza - design * MeSH
• zuby-sanace - selhání MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• biokompatibilní potahované materiály * MeSH
• hydroxyapatit * MeSH
• zubní implantáty * MeSH

Polarized Cu K edge x-ray absorption near-edge structure (XANES) spectra of CuO are analyzed. Partial spectral components reflecting both dipole and quadrupole transitions are resolved from the experiment. Theoretical spectra were obtained using the real-space multiple-scattering technique and by calculating the band structure via the pseudopotential method. We demonstrate that the pre-peak is of a quadrupole character and find its decomposition into individual d components. The self consistent pseudopotential calculation, free from any constraints on the form of the potential, improves the agreement between theory and experiment in those areas where real-space calculation, based on non-self-consistent muffin-tin potential, fails. Therefore we argue that the most significant contributions to the Cu K edge XANES come from one-electron processes.

• Publikační typ
• časopisecké články MeSH

Selective intraarterial neoadjuvant chemotherapy of carcinoma in the region of the lingual artery was performed in 23 patients (bilaterally in 4 patients). The superficial temporal artery (STA) was surgically exposed and a preshaped infusion catheter was inserted. The catheter tip was maneuvered through the STA into the lingual artery under fluoroscopic guidance. Two combinations of cytostatic agents were then continually infused through the catheter for 5-9 days. Treatment response was observed in 16 patients, 9 of whom showed a complete response. The combination of cisplatin and 5-fluorouracil was found most effective. The catheter became dislocated six times among 27 catheterizations and in each instance the position could be corrected. No major complications were encountered. We conclude that selective infusion technique is safer than previously reported semiselective infusions techniques.

• MeSH
• dospělí MeSH
• intraarteriální infuze metody   MeSH
• lidé středního věku MeSH
• lidé MeSH
• nádory jazyka farmakoterapie   MeSH
• nádory úst farmakoterapie   MeSH
• protinádorové látky aplikace a dávkování   MeSH
• ústní spodina MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• protinádorové látky MeSH

The authors present a technique of longterm lingual artery catheterization for intraarterial regional chemotherapy. The transtemporal approach enables safe introduction through the external carotid artery. Catheterization technique is presented in 16 patients with the diagnosis of carcinoma baseos oris and carcinoma linguae. Both the lingual arteries were infused in four patients with tumors spreading over the midline. The dislocation of the catheter was found seven times of twenty catheterizations. The following catheter repozition was always successful.

• MeSH
• intraarteriální infuze * metody   MeSH
• jazyk krevní zásobení   MeSH
• lidé MeSH
• nádory úst farmakoterapie   MeSH
• protinádorové látky aplikace a dávkování   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• protinádorové látky MeSH