Objective To study the effects of the periosteum，synovium andcartilage tissues on the gene expressions of proteoglycan, collagen Ⅱ, andnuclear factor kappa B (NF-κB) and to investigate the different effects of these tissues on cartilage regeneration. Methods In 20 New Zealand white rabbits, 20 cartilage explants were taken from the knee joints in each rabbit, the sizeof which was 4 mm×4 mm×4 mm. All the cartilages were divided into the following 4 groups and cultured for 7 days: Group A, with 5 pieces (2 mm×2 mm) of the synovium of theknee joints in each dish; Group B, with 5 pieces (2 mm×2 mm) of the periosteum ineach dish; Group C, with 5 pieces (2 mm×2 mm×2 mm) of the cartilage in each dish; and Group D, with no addition of other tissues (control group). RNA was extracted from the cells of the cartilage explants (4 mm×4 mm×4 mm) in all the dishes. Thegene expressions of proteoglycan, collagen Ⅱ and NF-κB were defected by a reversetranscription-polymerase chain reaction (RT-PCR).Results In group A, the gene expression of proteoglycan was significantly decreased. The relative density of this gene expression had a significant difference when compared with that in group D (1.09±0.21 vs. 1.25±0.25, Plt;0.05); the gene expressions of collagen Ⅱ and NF-κB were also decreased, but they had no significant differences when compared with those in group D (Pgt;0.05). In groupB, the gene expressions of proteoglycan, collagen Ⅱ, and NF-κB were significantly increased. The relative densities of these gene expressions were 1.60±0.26, 1.57±0.24, and 4.20±2.22, respectively, which had significant differences when compared with those in group D (Plt;0.05). In group C, the relative density of the gene expression of collagen Ⅱ was 1.43±0.28, which had a significant difference when compared with that in group D (Plt;0.05), but therelative densities of the gene expressions of proteoglycan and NF-κB had no significant differences when compared with those in group D (Pgt;0.05). Conclusion The results indicate that the periosteum can up-regulate the gene expressions of proteoglycan, collagen Ⅱ and NF-κB. The NF-κB is likely to be an important nuclear transcription factor related to cartilage regeneration. The results also suggest that the periosteum maybe better in facilitating the cartilage repair and regeneration in clinical practice.
Abstract To investigate the ectopic new bone formation following implantation of bovine hydroxyapatite Bio-oss together with free periosteum, 12 chabb: ch rabbits were selected. In 10 rabbits, Bio-oss block together with free periosteum was implanted in the gastrocnemius muscle of one leg randomly, and Bio-oss block alone was implanted in the same muscle of the other leg. In the other 2 rabbits, the periosteum was implanted into the gastrocnemius musle of both legs. Histologic examination and quantitative analysis of newbone formation were performed at 3 and 6 weeks postoperatively. The results showed that in the legs implanted bovine hydroxyapatite Bio-oss together with freeperiosteum, new bone formation began at 5th day after implantation. The area ofnew bone composed of 19.0% of the specimens at 3 weeks postoperatively. No boneformation through out the experimental period in Bio-oss block alone implantedlegs and also periosteum implanted legs. We concluded that bovine hydroxyapatite Bio-oss has a good capacity of osteoconduction. New bone can be formed after the implantation of hydroxyapatite combined with free periosteum.
Objective To introduce an effective method of treating old scaphoid fracture. Methods From April 1995 to April2002,11 patients with old scaphoid fracture were treated with transposition of vascularized periosteal flap and internal fixation; if necessary, the radial styloid was removed. Out of 11 patients( 8 males and 3 females, aged from 17 to 46 years), the fracture siteswere medialscaphoid in 7, the proximal one in 2 and the distal one in 2. The X-ray filmsshowed separated fracture lines. The fracture lines were less than 1 mm in 4patients and more than 1 mm in 3 patients. Sclerosis of skeleton ends and cystoid degeneration occurred in 2 patients, respectively. Results After a follow-up of 3 to 24 months, the fracture healing was obtained within 4 months in 9 casesand within 6 to 7 months in 2 cases. Internal fixation was taken out 3 months after bone healing. The carpal joint pain and weakness vanished in all cases.Conclusion Transposition of vascularized periosteal flap and internal fixation have many advantages, such as easy dissection, rich blood supply, quick new bone formation, short time of fracture healing and satisfactory function recovery of carpal joint.
Objective To study and compare boneforming mechanismafter compound of autologous periosteum-wrapped tendon with spongiosa homogenate and other implants in articular cavity, and to explore the possibility of the compound as a substitute for the lunate in Kienbock’s disease.Methods Forty-five New Zealand white rabbits were randomly divided into three groups: periosteum group(group A, n=15), composite group(group B, n=15), and control group(group C, n=15). The three sorts of implants were placed into articular cavity of the knee respectively. The changes of bone formation and bone morphogenetic protein (BMP) distribution of the implants were examined under optical microscope with HE and immunohistochemical staining and measured by CT 3, 6 and 9 weeks after operation.Results The result of BMP staining was negative after 3 weeks and positive in new cartilage cells after 9 weeks in group A. The positive BMP staining was observed in group B after 3 weeks and 9 weeks, which mainly distributed in new bone cells and cartilage cells. And negative BMP staining was observed every stage in groupC. The quantitative CT bone mineral density (BMD) values of 3 implants were analyzed, the difference was significant between the groups (Plt;0.01), except that between groups A and C in the 3rd week (Pgt;0.05). Conclusion The above results demonstrated that the compound of autologous periosteum-wrapped tendon and spongiosa homogenate can produce bone and cartilage massively under the induction of periosteum and bone-forming factors such as BMP in spongiosa homogenate and the compound can be used as a substitute for the lunate.
ObjectiveTo summarize the application status and progress of the strategies to augment tendon-to-bone healing. MethodsThe present researches focused on augmentation of tendon-to-bone healing were extensively reviewed. ResultsThe present strategies to augment healing of tendon-to-bone by enhancing the location environment, and increasing the cell numbers and relative growth factor. The mainly strategies include using calcium phosphate materials, biocompatible scaffolds and glue, growth factors, cell matrix, platelet-rich plasma, and periosteum. Although periosteum have been used in clinical and got some possitive effects, the others still not be used in clinical and needs further studies. ConclusionThere are many strategies to enhance the ability of tendon-to-bone healing, which got some positive results, but results of studies were varied. Thus, further fundamental research and clinical studies are required to achieve the best effects.
Osteoblasts were cultured and isolated from a piece of tibial pettiosteum of four New-Zealandrabbits. After subeultured,these cells Were incubatd in vitro with tritiated thvmidine for 36 hoursand then these labeled cells were implanted in the subeutaneous layer of the defects of the auriclarcartilage and the radial bone, After 2 weeks and 4 weeks respectively, these rabbits were killed andthe spoimens were obtained from the site where the cells had been transplanted. The transformation of these cells was observed by autoradiographic method. The results indicated that nearly all of the cultured cells were labeled. After 2 weeks, it was observed that many labeled osteoblasts were in different stages of differentiation, some were beried by extracellular matrix and resembled osteocyte, thers were differentiated into chondrocyte-like cell. In addition, some labeled osteoblasts were congregated in the form of multinucleated osteoclast. After 4 weeks , in the subcutaneous layer the labeled osteoblasts were changed to osteoid tissue and in the defect of the auricular crtilage these cells transformed into chondritic tissue; moreover, those labeled osteoblsts which had been implanted into the radial defect had differentiated into typical bone tissue. The results of this research indicated that the osteoblasts isolated from the periosteum if reimplanted to the same donor might be possible to repair the bone and cartilage defects.
In order to observe the effects of different facing directions of the germinal layer of periosteum on the cartilage regeneration, the human fibrin adhesive agent was used to adhere autogenous periosteum to repair the articular cartilage defect of rabbits. Twentyfour rabbits with 48 knee joints were divided randomly into two groups. A 0.6cm×1.2cm articular cartilage defect was created on the femoral trochlea until there was bleeding from the subchondral bone. A piece of periosteum, sized 0.75cm×1.5cm, was removed from the medial aspect of upper tibia. The periosteum was adhered to the defect by human fibrin adhesive agent. In Group 1 the germinal layer faced the subchondral bone and in Group 2 the germinal layer faced the joint cavity. The cartilage regeneration in both groups was observed by naked eyes and light microscope in 2nd and 6th weeks and by electron microscope after Safronin Ostained in 12th and 20th weeks. The results showed that before the 6th week, the cartilage regeneration was faster in Group 2 than that in Group 1. After that there was no significant difference in regeneration between the two groups. This suggested that the facing direction of the germinal layer was not a critical factor on cartilage regeneration. It was also found that the strength of the adhesive agent was not enough. The regenerated cartilage was proved to be hyaline cartilage.
Objective To review the research progress of the role of periosteum in distraction osteogenesis. Methods The related domestic and foreign literature about the role of periosteum in distraction osteogenesis in recent years was extensively reviewed, summarized, and the mechanism and influencing factors of periosteum during traction and osteogenesis were analyzed. Results The periosteum is rich in all kinds of cells (mesenchymal stem cells, osteoblasts, etc.), microvessel and various growth factors, which are necessary for the formation of new bone. It can promote the formation of new bone in the process of traction osteogenesis significantly. Conclusion The periosteum plays an important role in the progress of distraction osteogenesis.
OBJECTIVE To introduce a new method of bone defect repairing after bone cyst curettage. METHODS Eight cases with bone cyst were treated with this new method. The pieces of autogenous periosteum were implanted into the hematoma within the enveloped bone defect created after the bone cyst curettage. Among these patients, there were 5 males and 3 females, aged from 14 to 36 years old. All the lesions located in the upper of femur except one being located in humerus. The results were evaluated through the postoperative radiological findings with the preoperative ones and analysis of clinical functions. RESULTS All the patients were followed up for 2 to 11 years. X-ray films showed that osteogenesis developed well and that the enveloped bone defects had been repaired. No recurrence was found and the function of the affected limbs were maintained. CONCLUSION Autogenous periosteum grafting is effective in the treatment of solitary bone cyst.
Objective To investigate the clinical application of periosteal autograft in repair of cartilage defect caused by osteoarthritis of knee. Methods From 1996 to 1999, 36 knees of cartilage defect of knee joint in 28 cases were treated. In the operation, the cracked degenerative cartilage was removed before free periosteum from tibia was transplanted to repair the defect, and the meniscuses in 8 knees of the 36 knees were reconstructed. After operation, early continuous passive movement was adopted for 4 weeks, and 8 knees with reconstruction ofthe meniscus were immobilized by plaster splint for 7 days after operation and before passive movement. All of the cases were followed up for 1 to 4 years before clinical evaluation in symptoms, signs and radiological findings. Results The general satisfactory rate was 86.1%, in which the function was excellent in 22 knees and good in 9 knees. Conclusion The periosteal autograft is a good choice for repairing cartilage defect due to osteoarthritis, with a satisfactory outcomein the short term.