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Articles by J. H. Wang
Total Records ( 3 ) for J. H. Wang
  Y. J Jang , N. K Yeo and J. H. Wang

Objectives  To introduce the cutting and suture technique of the caudal L-strut for the management of caudal septal deviation and to evaluate its efficacy and surgical outcomes.

Design  Retrospective study.

Setting  Tertiary care rhinology clinic.

Patients  Forty-five patients who underwent endonasal septoplasty using the cutting and suture technique of the caudal L-strut.

Interventions  After elevation of the mucoperichondrial flap, deviated portions of cartilage and bone were excised, leaving at least a 1.5-cm strip of L-strut. If caudal septal deviation persisted, the caudal strut was cut at the convex-most part, and the cut ends were slightly overlapped and sutured together.

Main Outcome Measures  Improvement in the treatment of nasal obstruction using a visual analog scale and a questionnaire for subjective satisfaction were evaluated 2 to 6 months after septoplasty. To evaluate outcomes objectively, endoscopic photographs of the nasal cavity before and after surgery were evaluated by 2 independent surgeons.

Results  Significant improvement in the treatment of nasal obstruction was achieved, with mean visual analog scale scores of 7.93 preoperatively and 3.63 postoperatively (P < .001). Subjective satisfaction was rated as much improved in 68% of patients, improved in 15%, and no change in 17%. Endoscopic examinations showed that 51% of patients had near-complete correction of the septum and that 47% had improved but a little persisting caudal deviation. One patient had no change in caudal septal deviation on endoscopic examination.

Conclusion  The cutting and suture technique of the caudal L-strut seems to be a useful technique that can be performed with relative ease and simplicity.

  J. H. Wang , B. Y. Zhang , W. Z. Qu , H. S. Chu and H. Li
  It is known that the electro-optical behaviour of polymer-dispersed liquid crystals depends on the separation of the polymer and liquid crystal phases. The morphology of the liquid crystal domains depends on the nature of the chemical and physical processes occurring during domain formation. This work discusses the two-phase morphology found in an acrylate-based system that develops during polymerisation-induced phase separation. The effect of the dopant nano-graphite on the polymerisation and electro-optical properties are discussed. UV/VIS and time-resolved Fourier transform infrared spectroscopy is used for monitoring the polymerisation of the polymer-dispersed liquid crystals. The electro-optical properties of the polymer-dispersed liquid crystal films are measured using a polarimeter (PerkinElmer Model 341). The morphology of the liquid crystal droplets in the polymer matrix is probed by polarising optical microscopy and Fourier transform infrared spectroscopy images. The threshold voltage of the polymer-dispersed liquid crystals is dramatically decreased because of the increased conductivity of the polymer matrix on doping by nano-graphite.
  J. H Ahn , J. H Bae , Y. S Lee , K Choi , T. S Bae and J. H. Wang

An anterolateral approach to the tibial tunnel of posterior cruciate ligament reconstruction is used to reduce the sharpness of the graft-tunnel angle, the so-called killer turn effect. However, with the anterolateral approach, the tunnel might be widened into an ovoid shape because of the small angle between the tunnel and the anterolateral cortex.


The fixation strength of the posterior cruciate ligament graft in the tibial tunnel will be weaker in the anterolateral approach compared with the anteromedial approach.

Study Design

Controlled laboratory study.


Twenty paired cadaveric tibias were used. Tibial tunnels were made using following approaches: an anteromedial approach for 10 tibias and an anterolateral approach for 10 tibias. The anterior cortex-tunnel angle and the diameter of the tunnel entrance were measured by 2-dimensional computed tomographic scans. After fixation of the Achilles tendon allograft with a biodegradable screw, the maximal strength of the graft at failure was measured using a materials testing machine.


The mean cortex-tunnel angle was 47.5° ± 9.3° in the anteromedial approach group and 28.3° ± 7.4° in the anterolateral approach group. The mean long diameter of the tunnels in the anteromedial approach group was 10.6 ± 1.0 mm and in the anterolateral approach group it was 14.0 ± 1.5 mm. These two parameters showed statistically significant differences between the 2 groups (P < .01). The mean maximum load at failure for the anteromedial approach group was 385.4 ± 139.7 N, and for the anterolateral approach group it was 225.1 ± 144.1 N. This difference was statistically significant (P = .021).


The anterolateral approach resulted in a tunnel with a wider entrance, a more acute cortex-tunnel angle, and a lower maximal load at failure compared with tunnels created using the anteromedial approach.

Clinical Relevance

The use of additional fixation methods, such as post ties or ligament washers and screws, should be considered when using an anterolateral approach for tibial tunnel of posterior cruciate ligament reconstruction.

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