A Novel Method to Enhance Dynamic Rhinoplasty Outcomes: Double "V" Carving for Alloplastic Grafts.

Augmentation rhinoplasty is one of the most common plastic surgery procedures performed in Asia. Most Asian patients desire not only a natural-looking nose but also a nose with natural feel. Achieving such rhinoplasty outcomes with grafts has been a challenge for surgeons due to rigidity of grafting material. We propose a novel technique to address this limitation. A total of 200 healthy adult patients aged from 18 to 25 years were randomly chosen and classified into 5 groups: A, B, C, D, and control. Each group included 40 patients. The patients assigned to conventional grafting underwent rhinoplasty with L-shaped silicone prosthesis (group A) or expanded polytetrafluoroethylene (e-PTFE; group B), using traditional carving methods. The patients assigned to dynamic rhinoplasty underwent silicone (group C) or e-PTFE grafts (group D) using the modified double "V" method, which involves removing bilateral wedges from the graft to decrease rigidity. Patients in control group do not undergo the surgery. A 3-dimensional raster surface scanner was used to capture the images of the patients accurately and nasal mobility was measured. Subjective evaluations were carried out by a series of questionnaires asked to the patients. The angle α of nasal mobility was significantly lower in conventional grafting (23.09 [5.34] mm for silicone and 17.88 [4.96] mm for e-PTFE) versus the "V" carving (30.53 [3.76] mm for silicone and 23.77 [4.53] mm for e-PTFE; P < .05). The double "V" carving method is a simple, effective, and practical method for improving dynamic nasal outcomes in patient undergoing augmentation rhinoplasty.

Purification of Schwann cells from adult rats by differential detachment.

Differential detachment by collagenase treatment is a new and efficient method for Schwann cell (SC) purification. As its effect on adult animals remains unclear, we have investigated the possibility of SC purification from adult rats. To avoid any systematic bias, Schwann cell purity before and after purification were compared by morphology, immunostaining of P75(NTR) and S100 and flow cytometric analysis. The final SC purities reached 99% as confirmed by three independent analyses SC purity and the cell yields were above 10(6) cells after two rounds of purification. The method of differential detachment is also suitable for SC purification in adult rats and could be useful for research and clinical applications.

An application of embryonic skin cells to repair diabetic skin wound: a wound reparation trail.

Cell therapy has shown its power to promote diabetic chronic wound healing. However, problems of scar formation and loss of appendages have not yet been solved. Our study aims to explore the potential of using embryonic skin cells (ESkCs) to repair diabetic wounds. Circular wound was created on the back of the diabetic mice, and ESkCs stained with CM-DIL were transplanted into the wound. Wound area was recorded at the day 4, 7, 11, and 14 after transplantation. The tissue samples were obtained at week 1, 2, and 3, and the tissue sections were stained by transforming growth factor ß1 (TGF-ß1), TGF-ß3, vascular endothelial growth factor (VEGF), and CD31. The new skin formed on the wound of the diabetic mice with ESkC treatment at week 1 but not on the wounds of the non-treatment group. The histological scores of diabetic group with ESkC treatment were significantly better than the non-treatment group (P < 0.05). The fluorescence examination of CM-DIL and CD31 staining indicated that the ESkCs participated in the tissue regeneration, hair follicles formation, and angiogenesis. The expression of TGF-ß1 and VEGF in ESkC-treated groups was noticeable in week 1 but disappeared in week 2. TGF-ß3 was not expressed at week 1 but expressed markedly around hair follicles in week 2 in ESkC-treated groups. Our study demonstrated that ESkCs are capable of developing new skin with appendage restoration to repair the diabetic wounds.