PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 6931778

[The Bennet angle].

T Holste
View original source ↗Export metadata ↓

Abstract

The size of the Bennett angle in dependency on the lateral excursion, the initial Bennett movement, and the intercondylar distance was calculated as a basis for correcting semi-individual articulator. The extent of the initial Bennett movement and the lateral excursion are distinctly influential; the intercondylar distance plays a subordinate role. The results of the calculations provide an indication of the size of the Bennett angle taking into account the initial Bennett movement, the latleral excursion of the mandible, and the width of the face.

Explore related subjects

Biophysical PhenomenaBiophysicsCephalometryDental ArticulatorsHumansJaw Relation RecordMandibular CondyleMovementTemporomandibular JointEnglish AbstractJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

T Holste. 1980. [The Bennet angle].. https://pubmed.ncbi.nlm.nih.gov/6931778/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1995

Transcription against an applied force.

The force produced by a single molecule of Escherichia coli RNA polymerase during transcription was measured optically. Polymerase immobilized on a surface was used to transcribe a DNA template attached to a polystyrene bead 0.5 micrometer in diameter. The bead position was measured by interferometry while a force opposing translocation of the polymerase along the DNA was applied with an optical trap. At saturating nucleoside triphosphate concentrations, polymerase molecules stalled reversibly at a mean applied force estimated to be 14 piconewtons. This force is substantially larger than those measured for the cytoskeletal motors kinesin and myosin and exceeds mechanical loads that are estimated to oppose transcriptional elongation in vivo. The data are consistent with efficient conversion of the free energy liberated by RNA synthesis into mechanical work.

Biophysical Phenomena↗
PubMed1995

High-speed rotation and speed stability of the sodium-driven flagellar motor in Vibrio alginolyticus.

The Na(+)-driven flagellar motor in Vibrio alginolyticus rotates very fast. Rotation of a single flagellum on a stuck cell was measured by laser darkfield microscopy with submillisecond temporal resolution. The rotation rate increased with increasing external concentration of NaCl, and reached 1000 r.p.s. at 300 mM NaCl. The Na+ influx through the motor should determine the rotation period (tau) and affect the speed stability. Fluctuation of the rotation period was analyzed at various rotation rates (from approximately 50 r.p.s. to approximately 1000 r.p.s.), which were changed by changing the external concentration of NaCl and the addition of a protonophore or a specific inhibitor. At high rotation rates (over 400 r.p.s.), the observed rotation was stable, and the standard deviation of tau (sigma tau) ranged from 7% to 16% of the average rotation period (< tau >). At low rotation rates (under 100 r.p.s), the rotation period tended to fluctuate, and the distributions of tau were non-Gaussian. The value of sigma tau ranged from 10 to 30% of < tau >. However, the observed minimum value of sigma tau at various rotation rates was approximately equal to the calculated standard deviation due to the rotational diffusion of the flagellar filament. These results suggest that the torque was stably generated at various Na+ influxes through the motor. We observed large fluctuations that cannot be explained by rotational diffusion. We discuss the factors that induce the large fluctuation.

Biophysical Phenomena↗