• MeSH
• cementování metody   MeSH
• dospělí MeSH
• ketony MeSH
• lidé MeSH
• podpěry zubní MeSH
• polyethylenglykoly MeSH
• zubní implantáty klasifikace   škodlivé účinky   MeSH
• zubní náhrada ve spojení s implantáty * škodlivé účinky   MeSH
• zuby-sanace - selhání * klasifikace   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• Publikační typ
• kazuistiky MeSH

Aim: Bendable and angulated single-piece implants are used alternatively to screwable abutments in two-piecedental implant designs. Though used frequently, data on the stress distribution within such implants are not availableand the question whether the bending contributes to fracture resistance has not been addressed. Methods: We used the method of fi nite element to identify von Mises stresses and maximum stresses in bent andnon-bent but angulated implants. Implants with one (e.g. applicable to screw designs) or two (applicable to basalimplants) bending areas were the variables under investigation. Results: For bends up to 13 degrees we discovered that if there is only one bend, the maximum stress is in the bentarea. If two bends are made in two diff erent bending areas, the maximum stresses are distributed between the twoand, if either one of the bent areas is machined, there are no residual stresses within the implant body in this area.The maximum stresses are always located near the base-plates. The absolute value of the maximum stress is higherbecause no residual stresses are available to compensate stresses that stem from loading.Conclusion: Assuming that all other parameters are equal, bendable (basal) implants show a more even stress distributionalong the vertical implant region than identically shaped implants with a machine-angulated area. Bendablebasal implants therefore probably resist masticatory forces better than pre-angulated, machined implants, and unbentimplants which provide a thin region in the vertical implant area.

• MeSH
• analýza metodou konečných prvků statistika a číselné údaje   využití   MeSH
• analýza zatížení zubů metody   využití   MeSH
• anatomické modely MeSH
• financování organizované MeSH
• lidé MeSH
• návrh zubní protézy klasifikace   normy   MeSH
• pevnost v tahu MeSH
• statistika jako téma MeSH
• zubní implantáty klasifikace   normy   využití   MeSH
• zubní náhrady - baze klasifikace   normy   využití   MeSH
• Check Tag
• lidé MeSH

Aims: Bone structure around basal implants shows a dual healing mode: direct contact areas manifest primaryosteonal remodeling, in the void osteotomy-induced spaces, the repair begins with woven bone formation. This wovenbone is later converted into osteonal bone. The purpose of this study was to develop a model to accurately representthe interface between bone and basal implant throughout the healing process. The model was applied to the biologicalscenario of changing load distribution in a basal implant system over time.Methods: Computations were made through fi nite element analysis using multiple models with changing boneimplantcontact defi nitions which refl ected the dynamic nature of the interface throughout the bony healing process.Five stages of bony healing were calculated taking into account the changes in mineral content of bone in the vicinityof the load transmitting implant surfaces.Results: As the bony integration of basal implants proceeds during healing, peak stresses within the metal structureshift geographically. While bony repair may still weaken osteonal bone, woven bone has already matured. This leadsto changes in the load distribution between and within the direct contact areas, and bone areas which make latercontact with implant.Conclusions: This study shows that basal implants undergo an intrinsic shift of maximum stress regions duringosseointegration. Fatigue testing methods in the case of basal implants must therefore take into account this gradualshift from early healing phase until full osseointegration is achieved.

• MeSH
• analýza metodou konečných prvků využití   MeSH
• anatomické modely MeSH
• financování organizované MeSH
• lidé MeSH
• mandibula - implantace protéz metody   využití   MeSH
• osteointegrace fyziologie   účinky léků   MeSH
• protézy a implantáty využití   MeSH
• regenerace kostí fyziologie   účinky léků   MeSH
• statistika jako téma MeSH
• testování materiálů metody   normy   MeSH
• Check Tag
• lidé MeSH

• MeSH
• artritida komplikace   MeSH
• implantace zubů MeSH
• lidé MeSH
• návrh zubní protézy MeSH
• nemoci temporomandibulárního kloubu komplikace   MeSH
• zubní implantáty MeSH
• Check Tag
• lidé MeSH
• ženské pohlaví MeSH
• Publikační typ
• kazuistiky MeSH

OBJECTIVE: Clinical observations and mathematical models show that dental implants are influenced by the magnitude of loading. Therefore, the knowledge of mandible movement during mastication is important to assess occlusal and masticatory force vectors. The purpose of this study was to detect the path of movement of the lower jaw and to distinguish stages of mastication, duration of bolus processing and peak amplitude of mastication. METHOD: Motion analysis was used to record three-dimensional mandible movements. Individualized sensors were rigidly attached to the mandible of 51 study participants. At the beginning of the measurement, all subjects were asked to move the mandible in extreme positions (maximal opening and maximal lateral movements). Then, each subject masticated a bite of hard and soft food. Duration of bolus mastication and peak amplitude of mastication movement in mesio-distal, cranio-caudal and vestibulo-oral axes related to peak amplitude of marginal movements were evaluated for each subject. The chewing record of each subject was divided into three phases (chopping, grinding and swallowing), and the duration of mastication and number of closing movements were evaluated. RESULTS: The findings of this pilot study suggest that masticatory movements vary in individuals. Bolus character influences the process duration, but not the frequency of closing movements. Neither gender nor age had any influence on either the time or frequency of bolus processing. CONCLUSION: Relationships to directions and magnitudes of acting chewing force should be more precisely examined since transversally acted forces during grinding are important factors in tooth/implant overloading.

• MeSH
• audiovizuální záznam MeSH
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mandibula fyziologie   MeSH
• polykání MeSH
• potraviny MeSH
• senioři MeSH
• síla skusu MeSH
• žvýkání fyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

Dental implants for insertion from the lateral aspects of the jaw bone have been described repeatedly, since 1972. Long term results have been reported. Due to their design, BOI-Implants (basal osseointegration) can be installed even in those cases, where the vertical bone supply is reduced. This applies to the distal areas of the maxilla and the mandible. Furthermore, BOI-implants allow immediate loading as long as a balanced masticatory function can be achieved and maintained. This paper reports on the steps taken to install a full lower bridge in 4 BOI-implants and restoration in a patient with a circular bridge. The bridge was made from CoCr-Alloy and covered with acrylic resin. This treatment technique reduces costs and treatment time by about 50% compared to conventional techniques.

• MeSH
• čelist bezzubá chirurgie   MeSH
• endoseální implantace zubů MeSH
• lidé MeSH
• mandibula chirurgie   MeSH
• senioři MeSH
• zubní náhrada ve spojení s implantáty MeSH
• Check Tag
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• Publikační typ
• časopisecké články MeSH
• kazuistiky MeSH