Transverse Curvature

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Woo Young Sim - One of the best experts on this subject based on the ideXlab platform.

  • correction of pincer nail deformities using a modified double z plasty
    Dermatologic Surgery, 2015
    Co-Authors: Young Joo Cho, Jae Hoon Lee, Dong Jun Shin, Woo Young Sim
    Abstract:

    BACKGROUND Pincer nail is a deformity characterized by excessive Transverse Curvature of the nail plate that increases distally for which many conservative and surgical corrective modalities have been recommended. OBJECTIVE The purpose of this study is to investigate the outcomes and safety of modified double Z-plasty in the management of symptomatic pincer nail. MATERIALS AND METHODS Modified double Z-plasty has been performed on 20 great toes in 12 patients from January 2008 to December 2013. The mean age of patients was 43 (range: 20-65) years. Three men and 9 women were enrolled. Visual analogue scale (VAS) score for pain, Transverse angle, and width indices were investigated at the initial and the last follow-up. The average follow-up period was 2.4 years. RESULTS All parameters showed significant improvement after surgery. Between the initial and last follow-up, the mean VAS score fell from 7.4 to 0.3, the mean Transverse angle improved from 50 to 166°, and the mean width index improved from 65.4% to 97%. In all patients, the deformity was successfully eliminated with no recurrences. No complications were identified. CONCLUSION Modified double Z-plasty provides a long-standing effective treatment for pincer nail deformity with an excellent esthetic result.

Ugur Kocer - One of the best experts on this subject based on the ideXlab platform.

Young Joo Cho - One of the best experts on this subject based on the ideXlab platform.

  • correction of pincer nail deformities using a modified double z plasty
    Dermatologic Surgery, 2015
    Co-Authors: Young Joo Cho, Jae Hoon Lee, Dong Jun Shin, Woo Young Sim
    Abstract:

    BACKGROUND Pincer nail is a deformity characterized by excessive Transverse Curvature of the nail plate that increases distally for which many conservative and surgical corrective modalities have been recommended. OBJECTIVE The purpose of this study is to investigate the outcomes and safety of modified double Z-plasty in the management of symptomatic pincer nail. MATERIALS AND METHODS Modified double Z-plasty has been performed on 20 great toes in 12 patients from January 2008 to December 2013. The mean age of patients was 43 (range: 20-65) years. Three men and 9 women were enrolled. Visual analogue scale (VAS) score for pain, Transverse angle, and width indices were investigated at the initial and the last follow-up. The average follow-up period was 2.4 years. RESULTS All parameters showed significant improvement after surgery. Between the initial and last follow-up, the mean VAS score fell from 7.4 to 0.3, the mean Transverse angle improved from 50 to 166°, and the mean width index improved from 65.4% to 97%. In all patients, the deformity was successfully eliminated with no recurrences. No complications were identified. CONCLUSION Modified double Z-plasty provides a long-standing effective treatment for pincer nail deformity with an excellent esthetic result.

Gergely, László Árpád - One of the best experts on this subject based on the ideXlab platform.

  • Lanczos equation on light-like hypersurfaces in a cosmologically viable class of kinetic gravity braiding theories
    'MDPI AG', 2020
    Co-Authors: Racskó Bence, Gergely, László Árpád
    Abstract:

    We discuss junction conditions across null hypersurfaces in a class of scalar-tensor gravity theories with i) second order dynamics, ii) obeying the recent constraints imposed by gravitational wave propagation, and iii) allowing for a cosmologically viable evolution. These requirements select kinetic gravity braiding models with linear kinetic term dependence and scalar field-dependent coupling to Curvature. We explore a pseudo-orthonormal tetrad and its allowed gauge fixing, with one null vector standing as the normal, the other being transversal to the hypersurface. We derive a generalization of the Lanczos equation in a 2+1 decomposed form, relating the energy density, current and isotropic pressure of a distributional source to the jumps in the Transverse Curvature and Transverse derivative of the scalar. Additionally we discuss a scalar junction condition and its implications for the distributional source.Comment: 8 pages, this article belongs to the Special Issue Cosmological Inflation, Dark Matter and Dark Energ

László Á. Gergely - One of the best experts on this subject based on the ideXlab platform.

  • The Lanczos Equation on Light-Like Hypersurfaces in a Cosmologically Viable Class of Kinetic Gravity Braiding Theories
    MDPI AG, 2019
    Co-Authors: Bence Racskó, László Á. Gergely
    Abstract:

    We discuss junction conditions across null hypersurfaces in a class of scalar−tensor gravity theories (i) with second-order dynamics, (ii) obeying the recent constraints imposed by gravitational wave propagation, and (iii) allowing for a cosmologically viable evolution. These requirements select kinetic gravity braiding models with linear kinetic term dependence and scalar field-dependent coupling to Curvature. We explore a pseudo-orthonormal tetrad and its allowed gauge fixing with one null vector standing as the normal and the other being transversal to the hypersurface. We derive a generalization of the Lanczos equation in a 2 + 1 decomposed form, relating the energy density, current, and isotropic pressure of a distributional source to the jumps in the Transverse Curvature and Transverse derivative of the scalar. Additionally, we discuss a scalar junction condition and its implications for the distributional source

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