Ojective To evaluate the effect of implatation of prosthesis under the periosteum via oral incision on mentoplasty. Methods The buccal morphology and structure of cadaver was studied with topographic methods. 43 cases of mentoplasty was treated by implatation of prosthesis under the periosteum via oral incision. Results The mandibular shape of all cases treated by mentoplasty were improved with successful and satisfactory effects. No complication occurred. Conclusions It suggested that the implatation of prosthesis under the periosteum via oral incision was a safe, effective procedure for mentoplasty.

Objective To search for a more effective method for the treatment of traumatic tatoo. Methods According to the depth and pattern of tatoo in the skin, the ultra high frequency elecxosurgical technique was applied to make no bleeding incision. Then the particles of tatoo were exposed and removed thoroughly under a surgical microscope.Results Nine cases was treated with this method,and the degree of the particles was decreased remarkablly.Conclusion The ultra high frequeney electrosurgical technique is an ideal option in removing traumatic tatoo.

Objective To improve the implatation of silicone prosthesis for rhinoplasty.Methods Forty one nasal specimens of cadavers were studied with anatomical and histological methods. And 213 cases of rhinoplasty via the retrofasial space (RFS) of dorsum nasi were performed.Results The upper extremity of RFS looked like bifurcation shape. Such surgery was performed for implatation by silicone prosthesis with V shape notch, and the rhinoplasty was successful with satisfactory effects.Conclusion Improved implatation of silicone prosthesis is an effective method for rhinoplasty.

Objective To summarize 380 cases of the laser hair removal experience. Methods Using 800nm's wavelength of wide 30ms diode laser hair removal machine, different energy of selection and the time interval were different according to the different positions such as: the lowest energy 19J/cm 2 of hairline was selected and treated once at the interval of 3 - 4W with increasing 1-2J/cm 2 every time, as a result of 3 -5 times had been taken for cure. For legs, the lowest dose was 36 J/cm 2 . The highest energy achieved at 25J / cm 2 with interval 7 weeks, and it needed to increase 2-3J/cm 2 every times, and a total of 3 to 5 times were used for the treatment. After treatment each time, no special care was needed. Results The pati ents were followed up for more than half a year to 1 year. Cure rate was 95 %. Thereinto 20 persons appeared several spots of pigmentations after treatment, and those disappeared within 2 to 4 months. Only 2 persons with dark color of the skin still had slight pigmentation after 1 year. Conclusion Hairs treated many times by laser show regeneration delay and become thin in quality in the newborn hairs with lighting in color. The different energy is chosen for the treatment according to the different hair position that finally achieves permanent hair removal.

Objective　To search a simple, safe and effective osteotomy for hypertrophied mandibular angle.Methods　Hypertrophied mandibular angles were classified as lateral bulge, posteroinferior projection and combination based on their appearances. With local nerve blocking and infiltrating anesthesia, 162 cases with hypertrophied mandibular angel were respectively operated by intraoral approach with sagittal split, curved or combinative osteotomy method according to their types. Hypertrophied masseters were partially resected simutaneouly in 75 cases combined with masseter hypertrophy, and buccal fat pads were extracted in 52 cases associated with round faces.Results　Postoperative follow-up of 3～12 months to 60 cases of them showed 94.3 % of them were satisfactory.Conclusion　This operative method is simple and safe.It has minimal influence on the overall body of patients, and it is accord with the rules of aesthetic surgery.

Objective To study the course of different cervical nerve segments and their related intervertebral foramen’s size so as to increase safety and decrease complications in microinvasive surgery for cervical syndrome. Methods Fifteen human cervical specimens (30 sides) were anatomically observed for the course, branches and distribution of cervical nerves. Results The diameter of intervertebral foramen ranges from 0.54 to 0.65 cm, and increases gradually from top to bottom. The vertical diameter and anteroposterior diameter between C4, C5 and C6 vertebrae are smaller, and those between C3 and C7 are larger, but the diameter line of nerve root in intervertebral foramen from up to down gradually increases. The anteversion angle between nerve root and spine cord on horizontal plane is from 15? to 19?, within a small variation, while the declination angle on coronal plane gradually decreases from C3 to C7. There exist plenty of anastomosis branches among the cervical dorsal rami. Conclusion In the range of 0.6 cm around articular process at the entrance of intervertebral foramen, it is the narrowest part, the removal of which may alleviate the pressure on nerve root and benefit spinal stability. Because of the general existence of anastomosis branches of cervical nerve, the symptoms of cervical syndrome are not completely consistent to innervation. The intervertebral foramen between C4, C5, C6 is relatively small and the diameter line of nerve root is comparatively large, so the nerve root at C4, C5, C6 is most likely to be pressed.

Objective To investigate the relative histological change of transplanted domestic expanded polytetrafluoroethylene (e-PTFE), which were treated with different methods, in order to offer the referential data for clinical application. Methods e-PTFE treated with different methods was transplanted into subcutaneous tussue of rat. The samples harvested according to time sequence were examined by using histological and histochemical methods. Dynamic change of the structure between the e-PTFE and it's surrounded tissue was investigated based on the examination. Results Cell and tissue were observed on the inside of all the e-PTFE including the control group and the experiment groups. Heavy cell infiltration on the 3rd day was the most significant in control group, and the quantity of tissue ingrowth was also the most until the 28th day. The next was trimming group. The quantity of both cell infiltration and the tissue ingrowth in high pressure steamed group and forceps squeezed group were less than that in other groups. Conclusion Cell infiltration into domestic e-PTFE is significantly achieved since 72 hrs and fibrovascular ingrowth since the 7days after implanted e-PTFE under subcutaneous tissue of the rat. Different treatment methods of e-PTFE can affect the speed of tissue ingrowth into the e-PTFE, which could be a reference for clinic application of e-PTFE.

Objective To explore the relation between the enlargement of orbital volume and the degree of enophthalmos, and that between the enlarged volume of floor together with that of medial wall and the degree of enophthalmos. Methods A total of 17 patients of unilarteral orbital fracture were scanned by MSCT (slice width 0.625mm), who suffered late enophthalmos as a results of combination fracture of the medial wall and floor. The clinical data were collected, and input into a software named MIMICS in order to measure orbital volume, the degree of enophthalmos, the enlarged volume of medial wall, and that of orbital floor. Simple linear correlation and regression were carried out between the enlargement of orbital volume and the degree of enophthalmos. Mutiple linear correlation and regression were carried out between the enlarging volume of floor together with that of medial wall and the degree of enophthalmos. Results The equation of the enlargement of orbital volume (V) and the degree of enophthalmos (E) was E= 0.851 V-0.197 (Pearson r=0.969, P＜0.01, the 95% confidence intervals of 0.732-0.970). The standardized equation between the enlarged volume of floor together with that of medial wall and the degree of enophthalmos was E= 0.690 VF+0.413 VM-0. 086 (setpwise, entry =0.5, removal= 0. 11,P＜0.01 ); Comparing the standardized coefficients of independent variables, the outcome was bF (0.690) ＞ bM(0.413). Conclusion Significant linear correlation between the increment of the orbital volume and the degree of enophthalmos is found that 1.0 ml enlargeement in bony volume causes approximately 0.9 mm of enophthalmos; enlarged volume of floor has more powerful influence on the degree of enophthalmos than enlarged volume of medial wall, the former is 1.56 times of the latter.

Objective To study the clinical efficacy of bilateral double Z plasties for correction of the webbed neck defects, and to explore its principle and superiority to other reported methods. Methods We designed a small Z plasty over the mastoid with a rhomboidal skin resection of infra-hairline, and another large Z plasty transposition skin flap in superior-acromion. The tight band of fibrous webbing was separately cut and undermined at infra-mastoid and midclavicular line, wherein the middle part of the band retracted medially.Results It involved narrow tunneled anterolateral skin undermining and minimal skin resections from the nape of the neck, and posterior rhomboidal skin excision avoided the unnatural and noticeable lateral scars with normal skin extended in the middle of the webbing.The resultant scar was hidden and mild with no hypertrophic scars. A total of 5 cases were repaired, in which 1 case was male, 4 others were females. Follow-up for 1 to 11 years showed that the appearance and function in the repaired sites by using the bilateral double Z-plasties for repair of webbed neck deformity were very satisfactory. Conclusion We propose the use of this technique for correction of webbed neck deformities with simplified manipulation and cosmetic effect.

In the face of the worldwide threat of severe acute respiratory syndrome (SARS) to human life, some of the most urgent challenges are to develop fast and accurate analytical methods for early diagnosis of this disease as well as to create a safe anti-viral vaccine for prevention. To these ends, we investigated the antigenicity of the spike protein (S protein), a major structural protein in the SARS-coronavirus (SARS-CoV). Based upon the theoretical analysis for hydrophobicity of the S protein, 18 peptides were synthesized. Using Enzyme-Linked Immunosorbent Assay (ELISA), these peptides were screened in the sera from SARS patients. According to these results, two fragments of the S gene were amplified by PCR and cloned into pET-32a. Both S fragments were expressed in the BL-21 strain and further purified with an affinity chromatography. These recombinant S fragments were confirmed to have positive cross-reactions with SARS sera, either by Western blot or by ELISA. Our results demonstrated that the potential epitope regions were located at Codons 469-882 in the S protein, and one epitope site was located at Codons 599-620. Identification of antigenic regions in the SARS-CoV S protein may be important for the functional studies of this virus or the development of clinical diagnosis.
Antigens, Viral ; immunology ; Chromatography, High Pressure Liquid ; Cloning, Molecular ; Electrophoresis, Polyacrylamide Gel ; Enzyme-Linked Immunosorbent Assay ; Genetic Vectors ; Humans ; Mass Spectrometry ; Membrane Glycoproteins ; genetics ; immunology ; metabolism ; Molecular Weight ; Peptide Fragments ; chemistry ; Recombinant Proteins ; genetics ; immunology ; SARS Virus ; genetics ; immunology ; metabolism ; Spike Glycoprotein, Coronavirus ; Viral Envelope Proteins ; genetics ; immunology ; metabolism