Jeong‐Ho Park

BACKGROUND: No study to date has directly evaluated rotator cuff repair results among smokers. PURPOSE: To evaluate whether smoking affects healing after arthroscopic rotator cuff repair through propensity score matching (PSM). STUDY DESIGN: Cohort study; Level of evidence, 3. METHODS: Among 249 patients who underwent arthroscopic repair of full-thickness rotator cuff tears, 34 current heavy smokers were selected with a smoking history >20 pack-years (mean ± SD pack-years, 33.91 ± 12.13). Charac

PURPOSE: To perform a systematic review comparing the clinical scores, union rate, complications, reoperations, hospital stay, and operation time between open ankle arthrodesis (OAA) and arthroscopic ankle arthrodesis (AAA). METHODS: We conducted a comprehensive search in the MEDLINE, Embase, and Cochrane Library databases. Only comparative studies were included in this meta-analysis. The literature search, data extraction, and quality assessment were conducted by 2 independent reviewers. The ou

Osteoarthritis is prominent among the elderly, with symptoms originating from multiple parts of the body. A cross-sectional study of a nationwide survey was performed to describe the prevalence of and identify factors related to symptomatic hip, knee, and spine osteoarthritis.This cross-sectional study collected data from the Fifth Korean National Health and Nutrition Examination Survey (KNHANES V-5; 2010-2012). After excluding ineligible subjects, there were 8976 subjects in this study (3830 ma

Abstract As a fluid power source for practical micromachines using fluid power such as in-pipe mobile micromachines, micropumps having high power density are required. In this paper, a piezoelectric micropump using resonance drive is fabricated with the size of φ 9×10 mm. It basically consists of a bellows as a flexible pump chamber, a piezoelectric actuator for oscillating the bellows, and cantilever type of two check valves. An additional mass is attached to the free end of the piezoelectric a

Pectus excavatum and AIS were found to have a high concomitant incidence. And, the age, sex, and type of disease were significantly different in the scoliosis and pectus excavatum groups. Surgeons should consider these relationships when deciding upon treatment in patients with chest and spinal deformities.

The goal of this study was to compare treatment outcomes of screw proximal femoral nails and helical proximal femoral nails and to investigate the effectiveness of helical proximal femoral nails for the treatment of intertrochanteric fractures. Forty patients with intertrochanteric fractures were treated at our institution between January 2005 and January 2007, with a minimum follow-up of 1.5 years. Seventeen patients were treated with screw proximal femoral nails (mean patient age, 67 years; ag

High optical field confinement-possible silicon waveguides are used in various fields. The performance of a silicon waveguide depends on its sidewall roughness, which is responsible for scattering loss. The fabrication process for a silicon waveguide with a smooth sidewall for low loss was studied. The propagation loss of an optical silicon waveguide was reduced by using a SiO2 hard mask and reactive ion etching (RIE) with fluorine gases. The sidewall angle was controlled by Si etching with a SF

There were significant correlations between the VR, RH, and SS with the coronal curvature, pre- and postoperatively. In addition, there were significant correlations between the 3D deformities and outcomes. Computed tomography based measurements of 3D deformities can provide useful information in planning, and predicting the outcome of corrective surgery.

Abstract In this study, ammonium perchlorates (APs) with two or more different particle sizes were mixed to optimize the viscosity of the propellant slurry and the burn rate of the resulting solid composite propellants at various mixing ratios. First, to investigate the characteristics of bimodal AP, APs with 200 and 6 μm particles were used. The experimental results showed that the viscosity of the propellant mixture was excellent when the AP‐200 content, i. e., the AP with 200 μm particles, ra