Peri-implant bone loss of dental implants with platform-switching design after 5 years of loading: a cross-sectional study

OBJECTIVE The aim of this cross-sectional study was to estimate bone loss of implants with platform-switching design and analyze possible risk indicators after 5 years of loading in a multi-centered private practice network. METHOD AND MATERIALS Peri-implant bone loss was measured radiographically as the distance from the implant shoulder to the mesial and distal alveolar crest, respectively. Risk factor analysis for marginal bone loss included type of implant prosthetic treatment concept and dental status of the opposite arch. RESULTS A total of 316 implants in 98 study patients after 5 years of loading were examined. The overall mean value for radiographic bone loss was 1.02 mm (SD ± 1.25 mm, 95% CI 0.90- 1.14). Correlation analyses indicated a strong association of peri-implant bone loss > 2 mm for removable implant-retained prostheses with an odds ratio of 53.8. CONCLUSION The 5-year-results of the study show clinically acceptable values of mean bone loss after 5 years of loading. Implant-supported removable prostheses seem to be a strong co-factor for extensive bone level changes compared to fixed reconstructions. However, these results have to be considered for evaluation of the included special cohort under private dental office conditions.

Houston Stewart Chamberlain [Rezension]

C. G.

Etwas über Houston Stewart Chamberlain

Nathan Birnbaum

H. Stewart Chamberlain und seine Beurtheilung des Judenthums

B. Sopher

H. Stewart Chamberlain und seine Beurtheilung des Judenthums : II.

B. Sopher

H. Stewart Chamberlain und seine Beurtheilung des Judenthums : III.

B. Sopher

H. Stewart Chamberlain und seine Beurtheilung des Judenthums

B. Sopher

H. Stewart Chamberlain und seine Beurtheilung des Judenthums : V.

B. Sopher

H. Stewart Chamberlain und seine Beurtheilung des Judenthums : (Schluss)

B. Sopher

Evelyn Lear als Alkmene, Thomas Stewart als Jupiter, Szenenfoto, in: Giselher Klebe: Alkmene, Berlin: Deutsche Oper, 1961

Signatur des Originals: S 36/F10896

Thomas Stewart als Jupiter, Walter Wilhelm Dicks als Merkur {[u.a.], Szenenfoto, in: Giselher Klebe: Alkmene, Berlin: Deutsche Oper, 1961

Signatur des Originals: S 36/F11167

Rb-Sr and K-Ar data for Upper Vendian clayey rocks of the Russian Platform

Geochemical behavior of Rb-Sr and K-Ar systems in Upper Vendian clayey rocks of the Russian Platform is under consideredation. The use of additional data on grain size fractions of sedimentary rocks recovered from boreholes drilled in the Gavrilov Yam area made it possible to confirm the previous conclusion on two stages of epigenetic matter transformation (approximately 600 and 400 Ma ago). Distortions are related to transformation of sediments due to interaction in the water-rock system. Interaction degree was more intense in the upper part of the sedimentary section relative to its lower strata. These conclusions are substantiated by materials from boreholes that characterize different types of Vendian sections and different tectonic zones.

Angiosarcoma en linfedema crónico posmastectomía : Síndrome de Stewart-Treves

Objetivo: comunicar un caso de angiosarcoma en linfedema crónico posmastectomía, revisar los diagnósticos diferenciales, destacando que el diagnóstico temprano de esta entidad es la única alternativa para poder modificar la evolución tórpida de esta enfermedad. Caso clínico: presentamos una mujer de 78 años con el antecedente de mastectomía izquierda y cobaltoterapia realizadas en 1990, presentando en el año 2000 edema progresivo en miembro homolateral y pared torácica, con la aparición de placas y nódulos rojo-violáceos, indurados, dolorosos desde noviembre de 2006. La extensión y progresión de su enfermedad motivó su internación para corroborar diagnóstico presuntivo de síndrome de Stewart-Treves con biopsias, establecer diagnósticos diferenciales, estudio clínico-oncológico, control del dolor y evaluar posibles tratamientos. Comentarios: 1). El intervalo entre el diagnóstico del carcinoma de mama y el de este cuadro es de 10-20 años. 2). La supervivencia de los pacientes es < 5%. 3). Las posibilidades terapéuticas son agresivas e infructuosas en la mayoría de los casos. 4). El pronóstico depende de la alta sospecha precoz de las lesiones y su extirpación quirúrgica.

Element contents, sulfur and oxygen isotopes, and molecular biomarkers of phosphatic crust samples from the Chimbote Platform of the shelf off Peru

Authigenic phosphatic laminites enclosed in phosphorite crusts from the shelf off Peru (10°01' S and 10°24' S) consist of carbonate fluorapatite layers, which contain abundant sulfide minerals including pyrite (FeS2) and sphalerite (ZnS). Low d34Spyrite values (average -28.8 per mill) agree with bacterial sulfate reduction and subsequent pyrite formation. Stable sulfur isotopic compositions of sulfate bound in carbonate fluorapatite are lower than that of sulfate from ambient sea water, suggesting bacterial reoxidation of sulfide by sulfide-oxidizing bacteria. The release of phosphorus and subsequent formation of the autochthonous phosphatic laminites are apparently caused by the activity of sulfate-reducing bacteria and associated sulfide-oxidizing bacteria. Following an extraction-phosphorite dissolution-extraction procedure, molecular fossils of sulfate-reducing bacteria (mono-O-alkyl glycerol ethers, di-O-alkyl glycerol ethers, as well as the short-chain branched fatty acids i/ai-C15:0, i/ai-C17:0 and 10MeC16:0) are found to be among the most abundant compounds. The fact that these molecular fossils of sulfate-reducing bacteria are distinctly more abundant after dissolution of the phosphatic laminite reveals that the lipids are tightly bound to the mineral lattice of carbonate fluorapatite. Moreover, compared with the autochthonous laminite, molecular fossils of sulfate-reducing bacteria are: (1) significantly less abundant and (2) not as tightly bound to the mineral lattice in the other, allochthonous facies of the Peruvian crusts consisting of phosphatic coated grains. These observations confirm the importance of sulfate-reducing bacteria in the formation of the phosphatic laminite. Model calculations highlight that organic matter degradation by sulfate-reducing bacteria has the potential to liberate sufficient phosphorus for phosphogenesis.