OBJECTIVETo investigate the effect of Botulinum toxin type A (Botox) injection into the masseter muscle on mandibular development in rats.

METHODS12 28-day-old Wistar rats were divided into two groups as Botox group (n= 6) and control group (n = 6) which received anesthesia only. In Botox group, Botox was injected into the right masseter muscle, while only sterile saline into the left muscle. When the rats were 75-day-old, CT scan and 3D reconstruction were performed for cephalometry. The masseter muscles at both sides were weighed. Histologic study of masseter muscle and mandible was also performed.

RESULTSThe weight of right masseter muscle was (0.4575 +/- 0.0940) g in Botox group, and (0.8899 +/- 0.1030) g in control group (< 0.05). The mandibular height II and III was (10.8 +/- 0.8) mm and (9.5 +/- 0.6) mm in Botox group and (12.5 +/- 0.6) mm and (10.7 +/- 0.4) mm in control group, respectively (P < 0.05). The intergonial distance was (11.6 +/- 0.6) mm and (12.4 +/- 0. 6) mm in Botox and control group, respectively (P > 0.05).

CONCLUSIONSWhen the rats receive Botox injection into the masseter muscle at young age, the grown-up rats have a decreased mandibular height, but the mandibular length and intergonial distance are not affected.

Animals ; Botulinum Toxins, Type A ; administration & dosage ; pharmacology ; Injections, Intramuscular ; Male ; Mandible ; drug effects ; growth & development ; Masseter Muscle ; Rats ; Rats, Wistar

Objective To evaluate the effect of denervation of masseter muscle on the development of mandible.Methods Twenty-four 28-day-old Wistar rats were randomly divided into operative(n=9),sham-operative(n=9)and control(n=6)groups.The main trunk and initial branches of the masseter nerve on the right side were resected in the operative group.The nerve was exposed,but not resected in the sham-oporative group.The control group was only anaesthetised.CT scan and 3D reconstruction were performed when the rats were 75 d old.Seven cephaiometric points were selected and digitized and selected 7 linear distances were measured.The rots were killed with an overdose of 10% chloral hydrate after the CT scan.Masseter muscles on each side were obtained and weighted immediately.Results The mass of the mandible of the operative side was significantly lighter than that of the non-operative side in the operative group(P<0.05).No significant variances on length of the mandible Ⅰ,Ⅱ and Ⅲ,and height of the mandible Ⅰ were found among the 3 groups(P>0.05).Compared with the control group,the operative group showed shorter height of the mandible Ⅱ and width of the mandible,and the operative and sham-operative groups showed shorter height of the mandible Ⅲ(P<0.05).Conclusion Changes on mandibular height Ⅱ and bilateral width after denervation of masseter muscle are noted and no influence on mandibular length is found.

OBJECTIVETo find a new method for edge detection and modeling in frontal facial contour image.

METHODSSearching circle-based edge detection algorithm was developed on the basis of Sobel edge detector. Apriori knowledge of the facial contour and searching limitations as the minimum curvature radius, concave-convex property, and maximum edge disconnected distance were used to detect the edge of frontal facial contour. The frontal facial contour model was established with least squares curve fitting methods, and the relationship between the model rank and model precision was analyzed.

RESULTSThe edge detected by the new method was consistent with the actual edge of the facial contour and the irrelevant edge was well eliminated. Variation of the 2,4,10 time models from the actual image were compared, which identified the 10 time model as the best one.

CONCLUSIONThe effectiveness and practicability of this new method for edge detection and modeling has been tested, which provides a theoretic basis for designing facial contouring image system.

Algorithms ; Computer Simulation ; Face ; anatomy & histology ; Humans ; Image Interpretation, Computer-Assisted ; methods ; Models, Anatomic ; Pattern Recognition, Automated ; methods ; Reproducibility of Results ; Surgery, Plastic ; methods

OBJECTIVETo study the change of intestinal mucosa barrier in chronic severe hepatitis B patients and clinical intervention.

METHOD(1) 30 normal healthy controls and 60 chronic severe hepatitis B patients were enrolled in this study. The change of intestinal permeability was determined by urine lactulose/ mannitol ratio (L/M), and the serum diamine oxidase (DAO) was measured. (2) 60 chronic severe hepatitis B patients were randomly divided into two groups: the control group and the treated group, each group has 30 cases. Patients in the control group received standard treatment for 2 weeks, however, in addition to standard treatment, patients in the treated group also received glutamine 10g tid. Endotoxin (ET), DAO and L/M were compared between the two group.

RESULTS(1) Compared to healthy controls, the level of L/M and DAO was significantly increased in chronic severe hepatitis B patients (t = 2.762, P less than 0.01 or t = 6.326, P less than 0.01). (2) Compared to the control group, ET, DAO and L/M were significantly lower 2 weeks after treatment (F = 11.662, P less than 0.01; F = 12.699, P less than 0.01; F = 19.981, P less than 0.01).

CONCLUSION(1) There is an early intestinal mucosa barrier damage in chronic severe hepatitis B patients. (2) Compared to standard treatment, adding glutamine can reverse intestinal mucosa barrier damage.

Administration, Oral ; Adolescent ; Adult ; Amine Oxidase (Copper-Containing) ; blood ; Antiviral Agents ; pharmacology ; therapeutic use ; Child ; Endotoxins ; blood ; Female ; Glutamine ; pharmacology ; therapeutic use ; Hepatitis B, Chronic ; drug therapy ; metabolism ; physiopathology ; Humans ; Intestinal Mucosa ; drug effects ; metabolism ; physiopathology ; Intestine, Small ; Lactulose ; urine ; Male ; Mannitol ; urine ; Middle Aged ; Permeability ; Treatment Outcome ; Young Adult

OBJECTIVETo research the influence of palate bone implantation to the growth of maxilla in three dimensional direction.

METHODS40 patients of congenital cleft palate type II with palate board damage were stochastically divide into the comparison group and bone planted group. In bone planted group, HA-Bone cement was used to repair palate tabular damage. All patients are 16 full year old, cephalometric radiograph and tooth cast model were measured and contrast analysis was applied.

RESULTSPlanted bone group and the comparison group does not have the significance difference in both the maxilla length and maxilla hightness( P > 0.05); But there was significance difference in the width of post-part of the maxilla (P < 0.05).

CONCLUSIONSIt could promote the growth of maxilla width in use of bone implantation, that advocated the bone repair in the sequence treatment process in cases of the hard palate bone damage.

Adolescent ; Artificial Organs ; Bone Plates ; Bone Transplantation ; Child ; Child, Preschool ; Cleft Palate ; surgery ; Female ; Humans ; Male ; Maxilla ; growth & development ; surgery ; Wound Healing

OBJECTIVETo investigate the types of lipid disorder and its relationship with macrovascular diseases and insulin resistance in Chinese diabetic patients.

METHODS2,430 diabetic patients finished the diabetes complications assessment and were surveyed on their blood lipids, insulin level and macrovascular diseases. The insulin resistance (HOMA-IR) was calculated based on HOMA model.

RESULTSPrevalence of lipids disorder was as high as 63.8% in this group, including 23.9% with both hypercholesterolemia and hypertriglyceridemia (HY-C-T), 16.1% with hypercholesterolemia only (HY-C), 15.0% with hypertriglyceridemia only (HY-T), 5.5% with lower HDL level (L-HDL), 3.3% with hypercholesterolemia, hypertriglyceridemia and lower HDL level together. Compared with the patients with normal lipid level (control group), no duration differences existed among these groups. There were more female patients in HY-C and HY-C-T groups. BMI and WHR were higher in all groups with lipid disorder except in HY-C group. Macrovascular diseases were more common in HY-C-T patients than in control group (33.6% vs 24.0%, P < 0.001). Average blood pressure and the prevalence of hypertension were significantly higher in HY-C-T, HY-C, HY-T groups than in control group (139/79, 138/76, 134/77 vs. 132/75 mmHg; 53.2%, 50.1%, 46.2% vs. 39.2%). Fasting insulin level was significantly higher in HY-C-T and HY-C-T-L-LDL groups than in controls. Insulin resistance was more severe in all patients with lipid disorder except in L-HDL group, particularly in the HY-C-T-L-HDL group.

CONCLUSIONS(1) BMI, WHR increased significantly with the severity of lipid disorder. (2) Nearly two thirds of Chinese diabetic patients have lipid disorder, which is the strong risk factor of macrovascular diseases and aggravates insulin resistance. (3) There was severe insulin resistance in patients with hypertriglyceridemia or with hypertriglyceridemia plus other lipid disorder.

Adult ; Aged ; China ; epidemiology ; Diabetes Complications ; Diabetic Nephropathies ; etiology ; Diabetic Retinopathy ; etiology ; Female ; Humans ; Hyperlipidemias ; epidemiology ; etiology ; Hypertension ; epidemiology ; etiology ; Insulin Resistance ; Male ; Middle Aged ; Prevalence

OBJECTIVETo observe the changes in the expressions of somatomedins in the prostate epithelial cells in anoxic condition.

METHODSWe cultured prostate epithelial cell line RWPE-1 in vitro. At 4, 8, 12, 24, 48 hours after seeding of the cells, we determined the gene and protein expressions of the epidermal growth factor (EGF), basic fibroblast growth factor (bFGF), transforming growth factor-beta (TGF-beta), insulin-like growth factor-1 (IGF-1) and vascular endothelial growth factor (VEGF) in the prostate epithelial cells by RT-PCR and ELISA, respectively.

RESULTSWith the increase of time, the expressions of the EGF, bFGF, TGF-beta, IGF-1 and VEGF genes were obviously up-regulated, more significantly in the anoxic than in the normoxic prostate epithelial cells. Take FGF mRNA, its expression level was 0.14 +/- 0.01 in the anoxic and 0. 12 +/- 0.01 in the normoxic prostate epithelial cells at 8 hours (P = 0.01), but increased to 0.29 +/- 0.01 and 0.14 +/- 0.01, respectively, at 48 hours (P < 0.001). The expression of the TGF-beta protein was also more significantly increased in the anoxic than in the normoxic prostate epithelial cells, 0.32 +/- 0.01 versus 0.26 +/- 0.01 at 4 hours (P = 0.017) and 1.56 +/- 0.13 versus 0.87 +/- 0.06 at 48 hours (P < 0.001). The other 4 somatomedins showed no significant differences in their protein expressions between anoxic and normoxic conditions.

CONCLUSIONAnoxia can up-regulate the gene expressions of somatomedins and increase the secretion of TGF-beta in prostate epithelial cells.

Cell Hypoxia ; Cell Line ; Epithelial Cells ; metabolism ; Gene Expression Regulation ; Humans ; Male ; Prostate ; cytology ; Somatomedins ; metabolism ; Transforming Growth Factor beta ; metabolism ; Up-Regulation

OBJECTIVETo investigate angiogenesis of collagen-chitosan porous scaffold, and to study survive of skin grafts on the scaffold after bilayer dermal equivalent (BDE) was transplanted on wounds with full thickness skin defects.

METHODSThe full thickness skin defects were made on 10 Bama miniature pigs and the BDE composed of collagen-chitosan porous scaffold and silicone membrane was transplanted on wound. Angiogenesis in dermal equivalent, wound healing, and healing and survive of skin grafts on dermal equivalent were observed in 1, 2, and 3 weeks after the BDE transplantation. At the same time, CD34 positive signals (neo-forming micro-vessels) were detected by immunohistochemical staining.

RESULTSInflammatory cells and fibroblasts infiltrated into dermal equivalent and a few new micro-vessels had been formed in 1 week after the BDE transplantation; neo-forming micro-vessels perpendicular to wound bed had increased significantly in 2 weeks after the BDE transplantation; neo-forming micro-vessels could be observed in almost all dermal equivalents in 3 weeks after the BDE transplantation. CD34 positive signals (neo-forming micro-vessels) in 3 weeks after the BDE transplantation was much more than those in 2 weeks after the BDE transplantation, and CD34 positive signals in 2 weeks after the BDE transplantation was much more than those in 1 week after the BDE transplantation. Survival rate of intermediate split thickness skin graft were 10%, 70% and 100% respectively after the skin grafts had been grafted for 2 weeks on surface of the scaffold which had been transplanted for 1, 2 and 3 weeks. Epidermis which had been grafted on surface of the scaffold for 1 or 2 weeks could perfectly survive after BDE had been transplanted for 1 or 2 weeks.

CONCLUSIONSCollagen-chitosan porous scaffold plays a very important role in wound healing of full thickness skin defect and can induce fibroblast infiltration and new micro-vessel formation. Epidermis grafted on surface of collagen-chitosan porous scaffold can perfectly repair wounds, and it has brilliant applied prospects in repairing skin defect.

Animals ; Chitosan ; Collagen ; Disease Models, Animal ; Female ; Graft Survival ; Neovascularization, Physiologic ; Silicones ; Skin ; injuries ; Skin Transplantation ; Swine ; Swine, Miniature ; Tissue Scaffolds ; Wound Healing

OBJECTIVETo improve Madigan prostatectomy (MPC) for a much satisfactory effect in open surgery.

METHODSA total of 52 patients with benign prostatic hyperplasia (BPH) were treated using MPC. The MPC procedure was modified by exposing anterior prostatic urethra near the bladder neck and conjunction with cystotomy. This modified procedure preserved prostatic urethra intact and could also deal with intracystic lesions at the same time.

RESULTSThe intact of prostatic urethra was kept completely or almost for 48 cases. The hemorrhage amount during modified procedure was a less. The mean operative time was 120 minutes. The 35 patients had been followed up for 1 - 12 months. The average Qmax was 18.9 ml/s. The cystourethrography revealed that the urethra and bladder neck were intact in 8 patients postoperatively. Furthermore, the prostatic urethra was obviously wider after modified MPC.

CONCLUSIONSThe modified MPC can reduce the urethra injury and enlarge the MPC indications. The modified technique is easy to perform with little complications and much more satisfactory clinical result. The modified MPC is highly recommended.

Aged ; Humans ; Male ; Middle Aged ; Prostatectomy ; methods ; Prostatic Hyperplasia ; surgery

OBJECTIVETo investigate biosynthetic and apoptotic mechanisms in repair of full thickness skin defect with collagen-chitosan porous scaffold transplantation, and to determinate differences between wound repair with the scaffold transplantation and scar healing without the scaffold transplantation.

METHODSThe full thickness skin defects were made on 10 Bama miniature pigs and the bilayer dermal equivalent (BDE) composed of collagen-chitosan porous scaffold and silicone membrane was transplanted on wounds. Surfaces of wounds were observed at 1, 2, and 3 weeks after the BDE transplantation, and so were done the wound repairs after epidermis had been grafted for 2 weeks on surface of the scaffold which had been transplanted on skin defect wounds for 2 weeks. At the same time, TGF-beta1 expressions, apoptosis and self collagen replacement of scaffolds in wounds were detected in situ by immunohistochemical staining, terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL) and picrosirius red polarized light. Wounds without scaffold transplantation were studied as control.

RESULTS1) Wounds with the scaffold transplantation were different from granulation tissue. 2) The peak of TGF-beta1 expression in the scaffold wounds was from 1 to 2 weeks after BDE transplantation, and TGF-beta1 expressions decreased continuously from 3 to 4 weeks. TGF-beta1 expressions increased continuously in the control wounds from 1 to 3 weeks and decreased on 4 weeks. TGF-beta1 expressions in the scaffold wounds on 1st and 2nd week were significantly higher than those in the corresponding control wounds, whereas, TGF-beta1 expressions in the scaffold wounds on 3rd and 4th week were significantly lower than those in the corresponding control wounds. 3) Apoptosis increased continuously in the scaffold wounds from 2 to 4 weeks after BDE transplantation, and so did in the control wounds from 3 to 4 weeks. However, apoptosis signals in the scaffold wounds on 2nd, 3rd, and 4th week after BDE transplantation were significantly more than those in the corresponding control wounds, and there was no difference between apoptosis signals in the scaffold wounds on 1st week after BDE transplantation and those in the corresponding control wounds. 4) Observation by picrosirius red polarized light method: self collagen began to synthesize in the scaffold wounds on 1st week after BDE transplantation, and scaffolds had been replaced by self collagen from 2 to 3 weeks after BDE transplantation.

CONCLUSIONSCollagen-chitosan porous scaffold plays a very important role in wound healing of full thickness skin defect. The mechanisms of wound repair by dermal scaffold are different from those by granulation and scar healing. It has a good future in repairing skin defect.

Animals ; Apoptosis ; Chitosan ; metabolism ; Collagen ; biosynthesis ; metabolism ; Dermis ; Extracellular Matrix ; Female ; Skin Irritancy Tests ; Skin, Artificial ; Stents ; Swine ; Swine, Miniature ; Tissue Engineering ; Transforming Growth Factor beta1 ; metabolism ; Wound Healing