Sucrose has no beneficial effects on wound healing in rats.

OBJECTIVE: To evaluate the effects of sucrose treatment on the formation of granulation tissue in a standard wound model. DESIGN: Animal study. SETTING: University hospital, Finland. ANIMALS: 32 male Sprague-Dawley rats divided into 4 groups. INTERVENTIONS: Implantation of viscose cellulose sponge subcutaneously, and daily injection of three concentrations of sucrose (0.01, 0.1 or 1 M) or vehicle for 7 days. MAIN OUTCOME MEASURES: The amount of granulation tissue measured by chemical analysis and histology. The amount and distribution of types I and III collagen assayed by immunofluorescence. RESULTS: None of the three concentrations altered the amounts of DNA, RNA, hydroxyproline, nitrogen, hexosamines, and uronic acids in granulation tissue. Neither improvement nor deterioration was seen in the growth of granulation tissue in histological specimens. The amount and distribution of types I and III collagen was similar in controls and sucrose-treated rats. Type III collagen was most abundant near newly-formed vessels. Neither sucrose nor fructose was found in wound fluid while the concentration of glucose was significantly lower in all test groups than in controls. CONCLUSIONS: Sucrose solution had neither beneficial nor deleterious effects on the amount of developing granulation tissue in an experimental wound model. The amount and distribution of types I and III collagens were also not altered by sucrose treatment.     

Effect of vitamin C on fracture healing in elderly Osteogenic Disorder Shionogi rats

We studied the effect of vitamin C on fracture healing in the elderly. A total of 80 elderly Osteogenic Disorder Shionogi rats were divided into four groups with different rates of vitamin C intake. A closed bilateral fracture was made in the middle third of the femur of each rat. Five weeks after fracture the femora were analysed by mechanical and histological testing. The groups with the lower vitamin C intake demonstrated a lower mechanical resistance of the healing callus and a lower histological grade. The vitamin C levels in blood during healing correlated with the torque resistance of the callus formed (r = 0.525). Therefore, the supplementary vitamin C improved the mechanical resistance of the fracture callus in elderly rats. If these results are similar in humans, vitamin C supplementation should be recommended during fracture healing in the elderly.     

Improvement of fracture healing by systemic administration of growth hormone and local application of insulin-like growth factor-1 and transforming growth factor-beta1

Fracture healing is influenced by numerous hormones, growth factors, and cytokines. The systemic administration of growth hormone (GH) has shown to accelerate bone regeneration. Local application of growth factors, such as insulin-like growth factor-1 (IGF-1) and transforming growth factor-beta-1 (TGF-beta1), are known to stimulate bone metabolism. Until now, the exact local and systemic mechanisms that lead to improved bone regeneration remain unclear. In addition, the effect of systemic administration of GH as compared with locally delivered growth factors on fracture healing in rats is not known. A midshaft fracture of the right tibia of 5-month-old female Sprague-Dawley rats (n = 80) was intramedullary stabilized with IGF-1 and TGF-beta1 coated vs. uncoated titanium K-wires. The growth factors were incorporated in a poly(D,L-lactide) (PDLLA) coating and released continuously throughout the experiment. Recombinant species-specific (rat) GH was applied systemically (2 mg/kg body weight) by daily subcutaneous injection and compared with a placebo group. The healing process was radiologically monitored. Twenty-eight days after fracture biomechanical torsional testing was performed. The consolidation and callus composition, including quantification of cartilage and mineralized tissue, was traced in histomorphometrical investigations using an image analysis system. Both methods, the systemic administration of GH and the local application of growth factors, showed significant biomechanical and histological effects on fracture healing. The local growth factor application showed a stronger effect on fracture healing than the systemic GH injection. The combined application of both methods did not accelerate the effect on bone healing compared with the single application. It is therefore concluded that combining local and systemic stimulating methods does not provide further additive effects with regard to fracture healing.     

Ethanol and its effects on fracture healing and bone mass in male rats.

Operatively induced, standardized tibia fractures in 42 10-week-old male rats were fixed with intramedullary nails. 21 of the rats were fed liquid containing 15% ethanol. 5 weeks after inducing the fracture, the rats were killed and the total body bone mineral density (BMD) was analyzed with the DEXA technique, and the mechanical properties of the fractured and the unfractured tibiae as well as the ipsi- and contralateral femoral shaft and femoral neck were tested. The rats given a liquid containing 15% ethanol were found to have significantly lower total BMD and total calcium than the controls. We also found a significantly lower bending moment and bending stiffness both in the fractured and unfractured tibiae among rats fed on ethanol. The energy absorption until refracture was less in rats fed on ethanol. Posttraumatic osteopenia was present, as judged by the mechanical tests of the ipsilateral femoral shaft and the femoral neck in all animals. There was no difference in this respect between the animals fed on ethanol and the controls. We found that ethanol disturbs bone metabolism which reduces the mechanical properties of the tibiae and femora of rats, but the healing process of an induced tibial shaft fracture was not affected.     

Parecoxib has non-significant long-term effects on bone healing in rats when administered for a short period after fracture

Introduction  Selective and non-selective cyclo-oxygenase (COX) inhibitors impair bone healing by inhibiting prostaglandin synthesis. The purpose of this study was to evaluate the long-term effect of parecoxib, a selective COX-2 inhibitor, on bone healing in rats, when it is applied in a pattern similar to clinical treatment patterns, that is, in a high dose and for a short period after bone fracture. Method  Closed non-displaced mid-diaphyseal fractures in the middle of the left femoral shaft were generated in each animal. In the study group, parecoxib sodium (1.06 mg/kg) was administered intra-peritoneally every day for 7 days. In the control group, normal saline was administered intra-peritoneally every day for 7 days. In both groups fracture healing (bone union and callus formation) was evaluated with X-rays 28 and 42 days after surgery. Results  Bone healing was lower in the study group (60 vs. 80% in the control group 28 days after fracture and 80 vs. 90% 42 days after fracture) but this difference was not statistically significant (P > 0.05). Conclusion  Parecoxib does not have a significant long-term effect on bone healing in rats, when it is administered in a high dose and for a short period after bone fracture. Declaration  The experiments comply with the current laws of the EU, and the protocol was approved by the Local Ethics Committee on Animal Research.     

骨髓间充质干细胞促进糖尿病大鼠骨折愈合的研究

目的检测促炎因子TNF-α、IL-6及抗炎因子IL-4、IL-10以及Toll样受体4在骨髓间充质干细胞促进糖尿病大鼠骨折愈合过程中的动态变化,探讨炎症失衡在此过程中的作用及可能机制。方法 7~8周龄SPF级雄性自发性2型糖尿病GK大鼠56只,喂养高脂饲料造模。造模成功后(随机血糖≥11.1 mmol/L)暴露大鼠左侧股骨,人为造成开放性骨折并给与克氏针复位内固定,将培养收集浓缩的骨髓间充质干细胞注射于骨折周围肌肉软组织,于实验后第1周、3周、6周、8周分别行X线摄片、下腔静脉取血测定炎症因子、骨折局部软组织检测TLR4表达。结果术后第1周、3周、6周、8周对照组TNF-a、IL-6、TLR-4表达均高于实验组(P0.05),而IL-4、IL-10则低于实验组(P0.05);两组动物在手术后第三周均可见骨折处骨痂生长,实验组更加明显,但对照组骨痂不均匀,骨密度较低。结论骨髓间充质干细胞局部移植可以降低GK糖尿病大鼠骨折后机体的炎症反应,促进骨折愈合。     

The effect of growth hormone on fracture healing in old rats

The healing of fractures is known to decrease with age. Several mechanisms have been identified that might explain this age-related decrease in capacity for fracture repair, one of them being a decrease in growth hormone secretion. In the present experiment, two-year-old male rats with a standardized tibial fracture were given biosynthetic human growth hormone (b-hGH, 2.7 mg/kg/day in two daily injections) during the first 40 days of fracture healing and the controls were injected with saline. After 40 or 80 days of healing, the mechanical properties of the healing fractures were evaluated by three-point bending. At day 40, no differences were found in mechanical properties of fractured and intact tibiae between b-hGH injected rats and saline injected controls. At day 80, ultimate load, stiffness, and ultimate stress of the fractures had increased by 78%, 63%, and 58%, respectively, compared with the controls. In the contralateral, intact tibiae, ultimate load and energy absorption had increased by 12% and 17%, respectively, compared with the controls.     

Long-term effects of local growth factor (IGF-I and TGF-beta 1) treatment on fracture healing. A safety study for using growth factors.

Previous studies showed that growth factors dramatically stimulate healing processes in bone. However, the long-term effect of locally applied growth factors on fracture healing remains unclear. In considering the safety of using growth factors, it is necessary to elucidate that after initial stimulation, the effect stops and the result is a normally healed tissue. Therefore, the purpose of the present study was to investigate the long-term time course of healing processes during growth factor (GF) stimulated and unstimulated fracture healing in a closed tibial fracture model in rats. A well established local drug delivery system was used. IGF-I (50 microg) and TGF-beta 1 (10 microg) were locally applied using a 10 microm thin polylactide (PDLLA) coating on intramedullary implants. The biomechanical and histomorphometrical results demonstrated a significant stimulation of the fracture healing due to the locally applied growth factors compared to control at days 28 and 42 in agreement with the literature. At the last time point, 84 days after fracture, no differences were measurable in the biomechanical testing and the callus composition between the groups. The callus was consistently in the late phase of remodeling with no remaining cartilage. In conclusion, local growth factor application enhances the healing in the early phase without alteration of the normal healing process.     

人工合成成骨生长肽促进兔胫骨骨折愈合的实验研究

目的观察人工合成的成骨生长肽(sOGP)经静脉应用对兔胫骨骨折愈合的影响。方法52只新西兰大白兔制成胫骨中段截骨、髓内钉固定骨折模型后,随机分为两组。实验组从术后第1d开始每天注射sOGP0.5μg·kg-1至取材前1d,对照组注射同样剂量的生理盐水。分别于术后第1、2、3、4、6周每组宰杀3～5只,测定血清ALP、BGP;同时取材测定骨折端骨密度、摄X线片后,再行组织学检查和形态分析,观察骨痂的大小及其组成成分的变化;其中术后6周的标本还进行了生物力学测定。结果实验组血清ALP、BGP水平高于对照组。X线片显示两组骨折均愈合,第3、4周实验组外骨痂平均面积比对照组大,3周时为265.44mm2、209.95mm2,4周时为233.10mm2、209.21mm2。第3、4、6周的骨密度实验组均大于对照组,其中第4周的骨密度经F检验两组的差异具有显著性(P<0.05)。组织学形态分析显示第2、3、4周的外骨痂平均面积实验组比对照组大;所有实验组外骨痂中小梁骨占骨痂总面积的百分比均高于对照组,其中第2、4周经F检验两组的差异具有显著性(P<0.05)。第6周骨折端平均最大破坏载荷及最大位移实验组比对照组高,但差异没有显著性(P>0.05)。结论全身应用sOGP对不稳定固定的兔胫骨横断骨折的愈合具有一定的促进作用。     

运用高频率低能量振动促进骨折愈合的实验研究

目的 本研究旨在探讨全身性的高频率低能量振动对骨折愈合的作用.方法 建立大鼠闭合性股骨骨折髓内固定模型(n=55),并随机分为治疗组(n=28)和对照组(n=27).骨折后第5天开始对治疗组使用高频率低能量振动平台(35 Hz,峰振幅0.3 g)治疗,对照组则行假治疗.采用二维(X线)及三维(显微计算机断层扫描)的影像学方法和生物力学测试对骨折愈合的情况进行评估,并行统计学比较分析.结果 治疗后2周治疗组新生的矿化骨痂在上维及三维定量分析中均明显多于对照组,差异有统计学意义(P<0.001和P=0.014).治疗后4周治疗组的骨折愈合率(85.7%)高于对照组(57.1%),骨折愈合的生物力学属性也优于埘照组,差异有统计学意义(P=0.023).结论 高频率低能量振动可刺激骨折部位骨痂的生成及矿化,从而促进骨折愈合.     

戊酸雌二醇对去势大鼠骨折愈合影响的实验研究

目的 探讨戊酸雌二醇在骨质疏松性骨折愈合过程中的作用,为绝经后骨质疏松性骨折的治疗提供理论依据.方法 选用6月龄雌性Sprague-Dawley(SD)大鼠54只,实验分为SHAM组(假手术组)、OVX组(去势组)、补佳乐组.除SHAM组外,其余各组均切除双侧卵巢建立骨质疏松动物模型.去势后8周各组行右股骨骨折建立骨折模型,同时补佳乐组按0.104(mg·kg-1·d-1)灌胃.3组均在骨折后第2、4、6、8周处死大鼠后行放射学观察骨痂变化,骨痂HE染色及成骨细胞、破骨细胞计数.结果 ①放射学:OVX组骨痂密度影低,8周时OVX组骨折线仍然存在,SHAM组和补佳乐组骨折线模糊甚至消失.②骨痂组织学:OVX组骨小梁表面破骨细胞明显增多,成骨细胞也较多,呈骨高转换状态.8周时骨小梁变细、中断,软骨成分仍较多,软骨性骨痂向骨性骨痂转化缓慢;SHAM组和补佳乐组随骨折愈合骨小梁逐渐增加成熟,小梁骨粗大,排列紧密,骨小梁表面成骨细胞体积大,胞浆丰富,破骨细胞减少.③成骨、破骨细胞指数:2、4周OVX组破骨细胞指数大于补佳乐组和SHAM组.成骨细胞指数在3组间差异无显著性.结论 戊酸雌二醇对于促进绝经后骨质疏松性骨折早期愈合有效.     

The effects of systemic chemical sympathectomy on local bone loss induced by sciatic neurectomy

Background  

It has been suggested that the sympathetic nervous system (SNS) is involved in bone metabolism and that blockade of the SNS could reduce bone loss and stimulate bone formation. However, the question of whether suppression of SNS tone could compensate for mechanical unloading-induced bone loss must be further clarified. The purpose of this study was to investigate whether systemically inhibiting sympathetic nervous system (SNS) tone could prevent bone loss from mechanical-inactivity-induced osteopenia.     

The effects of local vanadium treatment on angiogenesis and chondrogenesis during fracture healing

This study quantified the effects of local intramedullary delivery of an organic vanadium salt, which may act as an insulin‐mimetic on fracture healing. Using a BB Wistar rat femoral fracture model, local vanadyl acetylacetonate (VAC) was delivered to the fracture site and histomorphometry, mechanical testing, and immunohistochemistry were performed. Callus percent cartilage was 200% higher at day 7 (p < 0.05) and 88% higher at day 10 (p < 0.05) in the animals treated with 1.5 mg/kg of VAC. Callus percent mineralized tissue was 37% higher at day 14 (p < 0.05) and 31% higher at day 21 (p < 0.05) in the animals treated with 1.5 mg/kg of VAC. Maximum torque to failure was 104% and 154% higher at 4 weeks post‐fracture (p < 0.05) for the healing femurs from the VAC‐treated (1.5 and 3.0 mg/kg) animals. Animals treated with other VAC doses demonstrated increased mechanical parameters at 4 weeks (p < 0.05). Immunohistochemistry detected 62% more proliferating cells at days 7 (p < 0.05) and 94% more at day 10 (p < 0.05) in the animals treated with 1.5 mg/kg VAC. Results showed 100% more vascular endothelial growth factor‐C (VEGF‐C) positive cells and 80% more blood vessels at day 7 (p < 0.05) within the callus subperiosteal region of VAC‐treated animals (1.5 mg/kg) compared to controls. The results suggest that local VAC treatment affects chondrogenesis and angiogenesis within the first 7–10 days post‐fracture, which leads to enhanced mineralized tissue formation and accelerated fracture repair as early as 3–4 weeks post‐fracture. © 2012 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 30:1971–1978, 2012     

Expression of parathyroid hormone-related peptide and insulin-like growth factor I during rat fracture healing.

Parathyroid hormone-related peptide (PTHrP) and insulin-like growth factor I (IGF-I) are both involved in the regulation of bone and cartilage metabolisms and their interaction has been reported in osteoblasts. To investigate the interaction of PTHrP and IGF-I during fracture healing, the expression of mRNA for PTHrP and IGF-I, and receptors for PTH/PTHrP and IGF were examined during rat femoral fracture healing using an in situ hybridization method and an immunohistochemistry method, respectively. During intramembranous ossification, PTHrP mRNA, IGF-I mRNA and IGF receptors were detected in preosteoblasts, differentiated osteoblasts and osteocytes in the newly formed trabecular bone. PTH/PTHrP receptors were markedly detected in osteoblasts and osteocytes, but only barely so in preosteoblasts. During cartilaginous callus formation, PTHrP mRNA was expressed by mesenchymal cells and proliferating chondrocytes. PTH/PTHrP receptors were detected in proliferating chondrocytes and early hypertrophic chondrocytes. IGF-I mRNA and IGF receptor were co-expressed by mesenchymal cells, proliferating chondrocytes, and early hypertrophic chondrocytes. At the endochondral ossification front, osteoblasts were positive for PTHrP and IGF-I mRNA as well as their receptors. These results suggest that IGF-I is involved in cell proliferation or differentiation in mesenchymal cells, periosteal cells, osteoblasts and chondrocytes in an autocrine and/or paracrine fashion. Furthermore, PTHrP may be involved in primary callus formation presumably co-operating with IGF-I in osteoblasts and osteocytes, and by regulating chondrocyte differentiation in endochondral ossification.     

胰岛素样生长因子-1基因转染骨髓间质干细胞移植对糖尿病大鼠骨折愈合的影响

目的 观察胰岛素样生长因子-1(IGF-1)基因转染的骨髓间质干细胞(BMSCs)移植对糖尿病大鼠骨折愈合的影响,探讨糖尿病骨折的基因疗法.方法 Wistar雄性6周龄大鼠50只,随机分为对照组、实验组,链脲佐菌素诱导为糖尿病模型后均造成右侧胫骨骨折,体外高糖环境下Ad-IGF-1转染BMSCs,将相应组别的BMSCs移植于骨折局部.于1、2、3、4、6周摄X线,取局部骨痂行苏木素-伊红(HE)染色,并免疫组织化学检测骨痂中IGF-1,酶联免疫吸附试验(ELISA)检测血清IGF-1.结果 第4周骨痂IGF-1灰度值:实验组为103±5,对照组为109±4(P＜0.05).第4周血清IGF-1浓度:实验组为(668.80±8.07) ng/L,对照组为(569.20±9.31) ng/L(P ＜0.01).结论 IGF-1基因转染的BMSCs移植能促进糖尿病大鼠的骨折愈合.     

The effects of nail rigidity on fracture healing in rats with osteoporosis

Background and purpose Stress shielding from rigid internal fixation may lead to refracture after removal of the osteosynthesis material. We investigated the effect of a low-rigidity (Ti-24Nb-4Zr-7.9Sn) intramedullary nail regarding stress shielding and bone healing of osteoporotic fractures in the rat.Methods 40 female Sprague-Dawley rats, aged 3 months, were divided into the following groups: sham-operation (SHAM) (n = 10), ovariectomized (OVX) (n = 10) and OVX-fracture (n = 20). 10 SHAM rats and 10 OVX rats were killed after 12 weeks to provide biomechanical data. Ovariectomy was performed 12 weeks before fracturing both femurs in 20 rats. The left fracture was stabilized with a high-rigidity titanium alloy pin (Ti-6Al-4V; elastic modulus 110 GPa) and the right with a low-rigidity (Ti-24Nb-4Zr-7.9Sn; elastic modulus 33 GPa). The bony calluses were examined by micro-CT at 6 and 12 weeks after fracture, bone volume (BV) and total volume (TV) were determined at the callus region (ROI1) and the total femur (ROI2). Subsequently, the bones were tested mechanically by a three-point bending test.Results In the low-rigidity group, TV (ROI1) increased at 6 weeks, but BV (ROI1), BV (ROI2) were similar but maximum load increased. At 12 weeks, the maximum load and also BV (ROI1, ROI2) were increased in the low-rigidity group.Interpretation The low-rigidity nail manufactured from Ti-24Nb-4Zr-7.9Sn showed better external callus formation, seemed to reduce effects of stress shielding, and reduced bone resorption better than the stiffer nail. The low-rigidity nail was strong enough to maintain alignment of the fracture in the osteoporotic rat model without delayed union.     

Inhibitory effects of tumor necrosis factor alpha on fracture healing in rats

Fracture healing, which involves a cascade of biological tissue responses, may be affected by various biochemical substances. One of these substances is tumor necrosis factor alpha (TNF). Studies were made on the effects of TNF on healing of fractured ribs of rats. Fracture healing was inhibited by daily administration of recombinant human TNF (400 μg/kg body weight per day, intraperitoneally) after fracture. The rate of union on day 20 was significantly lower in the TNF-treated group (4/18, 22.2%) than in the control group (14/18, 77.8%) (p < 0.001 by Chi-square test). Histological examination showed that TNF inhibited cartilagenous callus formation. On day 10, cartilage was seen in the gap zone and under the periosteum in the control group, but no cartilage formation was observed in the gap zone in 9 of 12 specimens from the TNF-treated group. On day 20, the fracture ends were united by newly formed bone in the control group, but mature fibrous tissue was seen in the gap zone, and bony or cartilagenous union was not achieved in the TNF-treated group. These results show that TNF inhibits cartilage formation in the early phase of bone induction in fracture healing and suggest that this effect of TNF is due to its inhibition of differentiation of mesenchymal cells into chondroblasts.     

The effects of nail rigidity on fracture healing in rats with osteoporosis

Background and purpose Stress shielding from rigid internal fixation may lead to refracture after removal of the osteosynthesis material. We investigated the effect of a low-rigidity (Ti-24Nb-4Zr-7.9Sn) intramedullary nail regarding stress shielding and bone healing of osteoporotic fractures in the rat.

Methods 40 female Sprague-Dawley rats, aged 3 months, were divided into the following groups: sham-operation (SHAM) (n = 10), ovariectomized (OVX) (n = 10) and OVX-fracture (n = 20). 10 SHAM rats and 10 OVX rats were killed after 12 weeks to provide biomechanical data. Ovariectomy was performed 12 weeks before fracturing both femurs in 20 rats. The left fracture was stabilized with a high-rigidity titanium alloy pin (Ti-6Al-4V; elastic modulus 110 GPa) and the right with a low-rigidity (Ti-24Nb-4Zr-7.9Sn; elastic modulus 33 GPa). The bony calluses were examined by micro-CT at 6 and 12 weeks after fracture, bone volume (BV) and total volume (TV) were determined at the callus region (ROI1) and the total femur (ROI2). Subsequently, the bones were tested mechanically by a three-point bending test.

Results In the low-rigidity group, TV (ROI1) increased at 6 weeks, but BV (ROI1), BV (ROI2) were similar but maximum load increased. At 12 weeks, the maximum load and also BV (ROI1, ROI2) were increased in the low-rigidity group.

Interpretation The low-rigidity nail manufactured from Ti-24Nb-4Zr-7.9Sn showed better external callus formation, seemed to reduce effects of stress shielding, and reduced bone resorption better than the stiffer nail. The low-rigidity nail was strong enough to maintain alignment of the fracture in the osteoporotic rat model without delayed union.     

Calcitonin and fracture healing. An experimental study on rats

The effects of systemically administered calcitonin (CT) on fracture healing were analyzed in an experimental study on rats. The healing of a fracture was followed from 3 days up to 9 weeks postoperatively. Half of the rats in each age group were given daily CT 10 MRC-U/kg body wt s.c. Mechanical properties of the healing tibial fractures (tension strength) as well as various connective tissue components of the callus tissue were analyzed. No difference in the radiological or microscopical appearance of the fractures was detectable between the animals receiving CT and the controls. In the biochemical analysis matrix production as assessed from the concentrations of nitrogen, hexosamines, and hydroxyproline within the callus followed the usual lines of undistributed fracture union without any difference between the groups with and without CT. No differences could be detected in the mineralization of the callus between the specimens from animals receiving CT and those without. The tensile strength values of the fractures increased almost linearly up to 9 weeks. At 1 week the tensile strength values for fractures union in the animals without CT were approximately 50% higher, but later on no differences could be detected between the groups. These results indicate that although in the early phases of long-term CT therapy collagen synthesis may be impaired, there will be no effect on the net content of collagen or calcifying tissue in the callus or on the mechanical strength of healing fractures.     

仙灵骨葆胶囊对骨质疏松性骨折大鼠骨生长因子及骨折愈合的影响

目的 探讨仙灵骨葆胶囊对骨质疏松性骨折大鼠骨生长因子BMP-2、IGF-1表达及骨折愈合的影响。方法 48只雌性SD大鼠随机分为：假手术组、模型组、雌二醇组、仙灵骨葆组，12只/组，采用“双侧卵巢切除术+右侧股骨干骨折髓内固定术”构建骨质疏松性骨折大鼠模型，评估骨折愈合情况，检测股骨骨痂BMD、股骨骨生物力学指标和血清骨代谢相关指标，检测骨痂BMP-2、IGF-1蛋白表达。结果 模型组较假手术组骨折愈合评分、股骨痂BMD、股骨骨生物力学指标（最大载荷、最大应力、最大位移）、骨痂BMP-2和IGF-I阳性表达均显著降低（P<0.05），雌二醇组、仙灵骨葆组较模型组骨折愈合评分、股骨痂BMD、股骨骨生物力学指标、骨痂BMP-2和IGF-I阳性表达均显著升高（P<0.05），均以仙灵骨葆组最高。模型组较假手术组血清骨代谢指标（BGP、PICP、TRACP-5b）均显著升高（P<0.05），雌二醇组、仙灵骨葆组较模型组血清骨代谢指标均显著降低（P<0.05），以仙灵骨葆组最低。结论 仙灵骨葆胶囊可能通过介导提高骨质疏松性骨折大鼠骨生长因子BMP-2和IGF-1表达，改善骨代谢，加速骨痂形成，增加骨密度，提高骨生物力学，促进骨折愈合。