Therapeutic Effectiveness of Leukocyte-and Platelet-rich Fibrin for Diabetic Foot Ulcers:A Retrospective Study

Objective Diabetic foot ulcer(DFU)is one of the most serious complications of diabetes.Leukocyte-and platelet-rich fibrin(L-PRF)is a second-generation autologous platelet-rich plasma.This study aims to investigate the clinical effects of L-PRF in patients with diabetes in real clinical practice.Methods Patients with DFU who received L-PRF treatment and standard of care(SOC)from 2018 to 2019 in Tongji Hospital were enrolled.The clinical information including patient characteristics,wound evaluation(area,severity,infection,blood supply),SOC of DFU,and images of ulcers was retrospectively extracted and analyzed.L-PRF treatment was performed every 7±2 days until the ulcer exhibited complete epithelialization or an overall percent volume reduction(PVR)greater than 80%.Therapeutic effectiveness,including overall PVR and the overall and weekly healing rates,was evaluated.Results Totally,26 patients with DFU were enrolled,and they had an ulcer duration of 47.0(35.0,72.3)days.The severity and infection of ulcers varied,as indicated by the Site,Ischemia,Neuropathy,Bacterial Infection,and Depth(SINBAD)scores of 2–6,Wagner grades of 1–4,and the Perfusion,Extent,Depth,Infection and Sensation(PEDIS)scores of 2–4.The initial ulcer volume before L-PRF treatment was 4.94(1.50,13.83)cm3,and the final ulcer volume was 0.35(0.03,1.76)cm3.The median number of L-PRF doses was 3(2,5).A total of 11 patients achieved complete epithelialization after the fifth week of treatment,and 19 patients achieved at least an 80%volume reduction after the seventh week.The overall wound-healing rate was 1.47(0.63,3.29)cm3/week,and the healing rate was faster in the first 2 weeks than in the remaining weeks.Concurrent treatment did not change the percentage of complete epithelialization or healing rate.Conclusion Adding L-PRF to SOC significantly improved wound healing in patients with DFU independent of the ankle brachial index,SINBAD score,or Wagner grade,indicating that this method is appropriate for DFU treatment under different clinical conditions.

Rescuing“hopeless”avulsed teeth using autologous platelet-rich fibrin following delayed reimplantation:Two case reports

BACKGROUND Tooth avulsion is one of the most severe types of dental trauma.Most avulsed teeth undergo long-term ankylosis and replacement resorption after delayed reimplantation and exhibit a poor prognosis.The aim of this work was to improve the success rate of avulsed teeth after delayed reimplantation using autologous platelet-rich fibrin(PRF).CASE SUMMARY Case 1 was a 14-year-old boy who fell and knocked out his left upper central incisor 18 h prior to his arrival at the department.The diagnoses were avulsion of tooth 21,lateral luxation of tooth 11 and alveolar fracture of teeth 11 and 21.In case 2,a 17-year-old boy fell 2 h prior to his presentation to the hospital,and his left upper lateral incisor was completely knocked out of the alveolar socket.The diagnoses included avulsion of tooth 22,complicated crown fracture of tooth 11and complicated crown-root fracture of tooth 21.The avulsed teeth were reimplanted along with autologous PRF granules and splinted using a semiflexible titanium preshaped labial arch.The root canals of the avulsed teeth were filled with calcium hydroxide paste,and root canal filling was performed 4 wk after reimplantation.The reimplanted teeth showed no symptoms of inflammatory root resorption or ankylosis at the 3-,6-,and 12-mo follow-up examinations after reimplantation with autologous PRF.In addition to the avulsed teeth,the other injured teeth were treated using corresponding conventional treatment methods.CONCLUSION These cases provide examples of the successful use of PRF to reduce pathological root resorption of the avulsed teeth,and the application of PRF may provide new healing opportunities for traditionally“hopeless”avulsed teeth.

Platelet-rich fibrin-induced bone marrow mesenchymal stem cell differentiation into osteoblast-like cells and neural cells

Bone marrow mesenchymal stem cells were allowed to develop for 14 days in a platelet-rich fibrin environment.Results demonstrated that platelet-rich fibrin significantly promoted bone marrow mesenchymal stem cell proliferation.In addition,there was a dose-dependent increase in Runt-related transcription factor-2 and bone morphogenetic protein-2 mRNA expression,as well as neuron-specific enolase and glial acidic protein.Results showed that platelet-rich fibrin promoted bone marrow mesenchymal stem cell proliferation and differentiation of osteoblast-like cells and neural cells in a dose-dependent manner.

Periodontally accelerated osteogenic orthodontics with platelet-rich fibrin in an adult patient with periodontal disease:A case report and review of literature

BACKGROUND In the clinical scenario,adult patients with periodontal diseases and dental malformation,characterized by dental crowding in lower anterior teeth with the thin biotype,often require orthodontic treatment.This case report aimed to evaluate the clinical and radiographic outcomes of periodontally accelerated osteogenic orthodontics(PAOO)combined with autologous platelet-rich fibrin(PRF)in an adult patient with class I malocclusion along with dental crowding,a thin periodontal biotype,and buccal plate deficiency.CASE SUMMARY A 32-year-old female complaining of dental crowding and gingival bleeding was referred to the orthodontic clinic.The patient underwent periodontal risk assessment prior to orthodontic treatment.She was diagnosed with a high risk of gingival recession due to dental crowding,root prominence,loss of buccal plates,and a thin gingival tissue biotype.The treatment regimen included PAOO combined with autologous PRF for alveolar augmentation and interproximal enamel reduction for moderate dental crowding.Clinically,PAOO-assisted orthodontic tooth movement in this case showed enhanced periodontium remodeling.Radiographic outcomes also showed statistically significant improvements(P<0.01)in the mandibular buccal alveolar bone.CONCLUSION This case report suggests the combination of autologous PRF with PAOO to enhance bone augmentation and long-term tissue support in adult orthodontic patients with periodontal disease.

Peri-implant keratinized gingiva augmentation using xenogeneic collagen matrix and platelet-rich fibrin:A case report

BACKGROUND Keratinized gingival insufficiency is a disease attributed to long-term tooth loss,can severely jeopardizes the long-term health of implants.A simple and effective augmentation surgery method should be urgently developed.CASE SUMMARY A healthy female patient,45-year-old,requested implant restoration of the her left mandibular first molar and second molar.Before considering a stage II,as suggested from the probing depth measurements,the widths of the mesial,medial,and distal buccal keratinized gingiva of second molar(tooth#37)were measured and found to be 0.5 mm,0.5 mm,and 0 mm,respectively.This suggested that the gingiva was insufficient to resist damage from bacterial and mechanical stimulation.Accordingly,modified apically repositioned flap(ARF)surgery combined with xenogeneic collagen matrix(XCM)and platelet-rich fibrin(PRF)was employed to increase the width of gingival tissue.After 1 mo of healing,the widths of mesial,medial,and distal buccal keratinized gingiva reached 4 mm,4 mm,and 3 mm,respectively,and the thickness of the augmented mucosa was 4.5 mm.Subsequently,through the second-stage operation,the patient obtained an ideal soft tissue shape around the implant.CONCLUSION For cases with keratinized gingiva widths around implants less than 2mm􀀀the soft tissue width and thickness could be increased by modified ARF surgery combined with XCM and PRF.Moreover,this surgery significantly alleviated patients’pain and ameliorated oral functional comfort.

Early therapeutic effect of platelet-rich fibrin combined with allogeneic bone marrow-derived stem cells on rats’ critical-sized mandibular defects

BACKGROUND Critically sized bone defects represent a significant challenge to orthopaedic surgeons worldwide.These defects generally result from severe trauma or resection of a whole large tumour.Autologous bone grafts are the current gold standard for the reconstruction of such defects.However,due to increased patient morbidity and the need for a second operative site,other lines of treatment should be introduced.To find alternative unconventional therapies to manage such defects,bone tissue engineering using a combination of suitable bioactive factors,cells,and biocompatible scaffolds offers a promising new approach for bone regeneration.AIM To evaluate the healing capacity of platelet-rich fibrin(PRF)membranes seeded with allogeneic mesenchymal bone marrow-derived stem cells(BMSCs)on critically sized mandibular defects in a rat model.METHODS Sixty-three Sprague Dawley rats were subjected to bilateral bone defects of critical size in the mandibles created by a 5-mm diameter trephine bur.Rats were allocated to three equal groups of 21 rats each.Group I bone defects were irrigated with normal saline and designed as negative controls.Defects of group II were grafted with PRF membranes and served as positive controls,while defects of group III were grafted with PRF membranes seeded with allogeneic BMSCs.Seven rats from each group were killed at 1,2 and 4 wk.The mandibles were dissected and prepared for routine haematoxylin and eosin(HE)staining,Masson's trichrome staining and CD68 immunohistochemical staining.RESULTS Four weeks postoperatively,the percentage area of newly formed bone was significantly higher in group III(0.88±0.02)than in groups I(0.02±0.00)and II(0.60±0.02).The amount of granulation tissue formation was lower in group III(0.12±0.02)than in groups I(0.20±0.02)and II(0.40±0.02).The number of inflammatory cells was lower in group III(0.29±0.03)than in groups I(4.82±0.08)and II(3.09±0.07).CONCLUSION Bone regenerative quality of critically sized mandibular bone defects in rats was better promoted by PRF membranes seeded with BMSCs than with PRF membranes alone.

Flapless immediate implant placement into fresh molar extraction socket using platelet-rich fibrin: A case report

BACKGROUND There are some challenges concerning immediate implant placement in the molar region.Platelet-rich fibrin(PRF),an autologous biomaterial,has been used widely for periodontal intra-bony defects,sinus augmentation,socket preservation,and gingival recession.However,the literature remains scarce for reports on immediate implants with PRF,particularly in the case of fresh molar extraction socket.CASE SUMMARY The patient was a 43-year-old woman with maxillary molar vertical crown-root fracture.She underwent flapless immediate implant placement into the fresh molar socket with PRF.At the follow-up visit 15 d post procedure,the vascularization of soft tissue was visible.There was no swelling or pain after the surgery.Six months postoperatively,the regeneration of bone and soft tissues was visible.Subsequently,the definitive restoration was placed.The patient was satisfied with the aesthetic outcomes.CONCLUSION The flapless immediate implant placement into the fresh molar socket with PRF is a feasible procedure.This case report demonstrates that PRF promotes bone and soft tissue regeneration apart from having an enhanced anti-inflammatory ability.Furthermore,the procedure involves a minimally invasive technique,thus reducing the surgical complexity.

Implant site development using titanium plate and platelet-rich fibrin for congenitally missed maxillary lateral incisors:A case report

BACKGROUND Bone deficiency and soft tissue atrophy in the absence of maxillary lateral incisors are among the most challenging problems for implant clinicians.Autologous bone grafting is the gold standard for bone augmentation,but not without limitations.Platelet-rich fibrin(PRF),a biodegradable autologous biomaterial,has been widely used for bone and soft tissue management.Moreover,titanium plate is an advantageous barrier due to its good space-maintaining ability.However,there is a lack of literature on implant site development using titanium plate and PRF for congenitally missing maxillary lateral incisors.CASE SUMMARY The patient was a 19-year-old girl with a congenitally missing tooth(#12).She underwent implant placement and simultaneous autologous bone grafting with titanium plate and PRF.At the follow-up visit 15 d post-procedure,the vascularization of soft tissue was visible.There was no swelling or pain after the surgery.Six months postoperatively,bone regeneration was evident.Subsequently,the definitive restoration was placed,and the patient was satisfied with the esthetic outcomes.CONCLUSION Implant site development using titanium plate and PRF for congenitally missing maxillary lateral incisors is a feasible procedure.In this case,the labial bone plate was displaced but remained connected to the base bone,ensuring blood supply.The titanium plate fixed the labial bone plate and maintained the osteogenic space,while the PRF provided growth factors and leukocytes for bone and soft tissue regeneration.Furthermore,the procedure reduced the surgical complexity and adverse reactions,displaying outstanding esthetic outcomes.

Comparative evaluation of effect of injectable platelet-rich fibrin with collagen membrane compared with collagen membrane alone for gingival recession coverage

BACKGROUND Collagen membrane and platelet-rich fibrin(PRF)have emerged as vital biomaterials in the field of periodontal regeneration.Minimally invasive techniques are being preferred by most periodontists,as it is patient compliant with fewer post-surgical complications as compared to conventional surgical techniques.Thus,in this study we have evaluated the effect of injectable PRF(i-PRF)with collagen membrane compared with collagen membrane alone using vestibular incision subperiosteal tunnel access(VISTA)technique for gingival recession coverage.AIM To compare the efficacy of VISTA using collagen membrane with collagen membrane soaked in injectable PRF for gingival recession coverage.METHODS A split mouth randomized controlled clinical trial was designed;13 subjects having at least 2 teeth indicated for recession coverage were enrolled in this study.The sites were randomly assigned to control group(VISTA using collagen membrane alone)and the test group(VISTA using collagen membrane with i-PRF).The clinical parameters assessed were pocket depth,recession depth(RD),recession width(RW),relative attachment level,keratinised tissue width(KTW),keratinised tissue thickness(KTT),and percentage root coverage.RESULTS RD showed a statistically significant difference between the test group at 3 mo(0.5±0.513)and 6 mo(0.9±0.641)and the control group at 3 mo(0.95±0.51)and 6 mo(1.5±0.571),with P values of 0.008 and 0.04,respectively.RW also showed a statistically significant difference between the test group at 3 mo(1±1.026)and 6 mo(1.65±1.04)and the control group at 3 mo(1.85±0.875)and 6 mo(2.25±0.759),with P values of 0.008 and 0.001,respectively.Results for KTW showed statistically significant results between the test group at 1 mo(2.85±0.489),3 mo(3.5±0.513),and 6 mo(3.4±0.598)and the control group at 1 mo(2.45±0.605),3 mo(2.9±0.447),and 6 mo(2.75±0.444),with P values of 0.04,0.004,and 0.003,respectively.Results for KTT also showed statistically significant results between test group at 1 mo(2.69±0.233),3 mo(2.53±0.212),and 6 mo(2.46±0.252)and the control group at 1 mo(2.12±0.193),3 mo(2.02±0.18),and 6 mo(1.91±0.166),with P values of 0.001,0.001,and 0.001,respectively.The test group showed 91.6%,81.6%,and 67%root coverage at 1 mo,3 mo,and 6 mo,while the control group showed 82.3%,66.4%,and 53.95%of root coverage at 1 mo,3 mo,and 6 mo,respectively.CONCLUSION The use of minimally invasive VISTA technique along with collagen membrane and injectable form of platelet-rich fibrin can be successfully used as a treatment method for multiple or isolated gingival recessions of Miller’s class-I and class-II defects.

Autologous platelet-rich-fibrin-induced revascularization sequelae:Two case reports Autologous platelet-rich-fibrin-induced revascularization sequelae:Two case reports

BACKGROUND A key requirement for biomimetic regeneration of tissues is a 3D scaffold.The gold standard scaffold for revascularization is the blood clot,however,an adequate blood clot cannot always be achieved in narrow canals or mature roots.Hereby,we document the effects of platelet-rich fibrin(PRF)for the regenerative endodontic treatment(RET)of two immature permanent teeth with necrotic pulps for up to 48 mo.CASES SUMMARY The first patient was a 22-year-old female with history of trauma in tooth#9 with a sinus tract and a large periapical lesion.The second was a 9-year-old male presenting with a badly decayed tooth#14.Both cases were treated with RET and PRF prepared from the patients’blood.PRF and its extract were used as a scaffold for RET.Patients were followed-up to 9 and 48 mo(4 years),respectively.Both patients,were asymptomatic after treatment.At the 9-mo-follow-up of case#1,there was radiographic evidence of periapical bone healing,however,the root apex was still open.In case#2,the roots exhibited apical closure and normal periapical bone architecture at 12-mo follow-up,while no root lengthening was observed.After 48 mo,case#2 showed extensive intracanal calcification in all root canals that complicated conventional root canal treatment.CONCLUSION RET with PRF and its extract could be used in revascularization of immature permanent teeth.However,proper case selection to comply with long-term follow-up is necessary and adverse events such as calcification and canal obliteration should be planned for.

Evaluating the Benefits of Platelet Rich-Fibrin in Periodontal Regeneration: A Literature Review

Introduction: Platelet Rich-Fibrin (PRF) is a biological matrix derived from a patient’s own blood, rich in growth factors and platelets. Its use in various periodontal and non-periodontal procedures is gaining recognition due to its potential in promoting tissue regeneration. The purpose of this review was to evaluate the benefits of using PRF in intra-bony defect regeneration, guided-bone regeneration, and sinus floor elevation. Methods: The study searched PubMed for manuscripts published between 2017 and 2022 to better understand the clinical and radiological effects of PRF. The manuscripts were divided into the following sections: intra-bony defect regeneration, guided-bone regeneration, and sinus floor elevation. Results: In intra-bony defects, PRF improved clinical and radiological parameters when compared with OFD alone, with a significant difference in wound healing at 7 days. In GBR, a CBCT evaluation shows no statistical difference between the PRF-autogenous bone complex group and the bovine bone-collagen membrane complex regarding volume change of the augmented bone with a 16% rate of bone loss following a 6-month healing period. Also, a slight increase in bone thickness has been seen when liquid PRF is used. In sinus floor elevation, results revealed no differences in graft volume between PRF group and control group at any of the evaluated time points. Although higher implant stability immediately postoperatively, higher new bone formation, the lesser amount of residual graft and earlier implant placement. Conclusion: Platelet Rich-Fibrin is widely accepted for use in periodontal surgery and dentistry due to its minimally invasive nature and low risk of adverse effects, with positive results in tissue regeneration. There is evidence that PRF leads to improved and faster healing, as well as cost-effective regenerative procedures compared to other treatments.

Autologous peripheral blood-derived orthobiologics:Different types and their effectiveness in managing knee osteoarthritis

Knees are the most commonly impacted weight-bearing joints in osteoarthritis(OA),affecting millions of people worldwide.With increasing life spans and obesity rates,the incidence of knee OA will further increase,leading to a significant increase in the economic burden.Conventional treatment modalities utilized to manage knee OA have limitations.Over the last decade,the role of various autologous peripheral blood-derived orthobiologics(APBOs)for the treatment of knee OA has been extensively investigated.This editorial provided an overview and focused on defining and shedding light on the current state of evidence based on the most recent published clinical studies concerning the use of APBO for the management of knee OA.While numerous studies have demonstrated promising results for these preparations,a notable gap exists in the comparative analysis of these diverse formulations.This absence of head-to-head studies poses a considerable challenge for physicians/surgeons in determining the optimal preparation for managing knee OA and achieving sustained longterm results.Thus,more adequately powered,multicenter,prospective,doubleblind,randomized controlled trials with longer follow-ups are needed to establish the long-term efficacy and to aid physicians/surgeons in determining the optimal APBO for the management of knee OA.

改良型富血小板纤维蛋白牙槽窝保存术在牙槽骨量保护及牙槽骨形态维持中的作用研究

目的:分析改良型富血小板纤维蛋白(PRF)牙槽窝保存术在牙槽骨量保护及牙槽骨形态维持中的作用研究。方法:根据简单随机分组法将本院2021年9月至2023年9月收治的105例接受牙槽窝保存术治疗患者分为观察组(n=52,改良型PRF治疗)和对照组(n=53,常规治疗);对比两组患者临床治疗效果,治疗前后牙槽骨量及牙槽骨形态变化。结果:与对照组比,观察组愈合时间短(P<0.05),观察组术后1周、术后2周创口愈合率均高于对照组(P<0.05)。术后4个月,两组BC1差异均无统计学意义(P>0.05),观察组平均灰度值2(BD2)及骨获得量(BG)均高于对照组(P<0.05),观察组BC2低于对照组(P<0.05)。术后6个月,观察组牙槽骨宽度、高度及骨密度水平及改善幅度均大于对照组(P<0.05)。术后3个月,观察组SBI低于对照组(P<0.05)。结论:改良型PRF用于牙槽窝保存术中可发挥较好的植骨效果,有助于创口愈合,在牙槽骨量、牙槽骨形态维持中具有较好的作用。

Platelet-rich plasma gel in combination with Schwann cells for repair of sciatic nerve injury

Bone marrow mesenchymal stem cells were isolated from New Zealand white rabbits, culture-expanded and differentiated into Schwann cell-like cells. Autologous platelet-dch plasma and Schwann cell-like cells were mixed in suspension at a density of 1 x 106 cells/mL, prior to introduction into a poly （lactic-co-glycolic acid） conduit. Fabricated tissue-engineered nerves were implanted into rabbits to bridge 10 mm sciatic nerve defects （platelet-rich plasma group）. Controls were established using fibrin as the seeding matrix for Schwann cell-like cells at identical density to construct tissue-engineered nerves （fibrin group）. Twelve weeks after implantation, toluidine blue staining and scanning electron microscopy were used to demonstrate an increase in the number of regenerating nerve fibers and thickness of the myelin sheath in the platelet-rich plasma group compared with the fibrin group. Fluoro-gold retrograde labeling revealed that the number of Fluoro-gold-positive neurons in the dorsal root ganglion and the spinal cord anterior horn was greater in the platelet-rich plasma group than in the fibrin group. Electrophysiological examination confirmed that compound muscle action potential and nerve conduction velocity were superior in the platelet-rich plasma group compared with the fibrin group. These results indicate that autologous platelet-rich plasma gel can effectively serve as a seeding matrix for Schwann cell-like cells to construct tissue-engineered nerves to promote perJpheral nerve regeneration.

Platelet-rich plasma,an adjuvant biological therapy to assist peripheral nerve repair

Therapies such as direct tension-free microsurgical repair or transplantation of a nerve autograft,are nowadays used to treat traumatic peripheral nerve injuries（PNI）,focused on the enhancement of the intrinsic regenerative potential of injured axons.However,these therapies fail to recreate the suitable cellular and molecular microenvironment of peripheral nerve repair and in some cases,the functional recovery of nerve injuries is incomplete.Thus,new biomedical engineering strategies based on tissue engineering approaches through molecular intervention and scaffolding offer promising outcomes on the field.In this sense,evidence is accumulating in both,preclinical and clinical settings,indicating that platelet-rich plasma products,and fibrin scaffold obtained from this technology,hold an important therapeutic potential as a neuroprotective,neurogenic and neuroinflammatory therapeutic modulator system,as well as enhancing the sensory and motor functional nerve muscle unit recovery.

Erbium-doped yttrium aluminum garnet laser and advanced plateletrich fibrin+in periodontal diseases:Two case reports and review of the literature

BACKGROUND The goal of periodontal disease treatment is to completely remove bacteria and promote wound healing.The erbium-doped yttrium aluminum garnet(Er:YAG)laser is commonly used to treat periodontal disease.Advanced platelet-rich fibrin+(A-PRF+)secrets growth factors that accelerates soft-and hard-tissue regeneration and wound healing.Herein I present 2 cases of patients with oral diseases treated with a combination of Er:YAG laser and A-PRF+.CASE SUMMARY Case 1 was a female with pocket depth bone loss over 8 mm and infection of tooth 31 and 41,and severe advanced periodontitis with grade III mobility.Case 2 was a male with tooth 22 root end apical swelling and infection and alveolar bony defects.Clinical outcomes were recorded at 6 and 36 mo.In case 1,the Er:YAG laser was used to perform open flap debridement(100 mJ/pulse,15 Hz)and remove calculus and granulation tissue(50 mJ/pulse,30 Hz).In case 2 the laser was used to create a semilunar full thickness flap incision(80 mJ/pulse,20 Hz)and eliminate the pathogen(100 mJ/pulse,15 Hz).In both patients,A-PRF+mixed with bone was used to fill bone defects,and A-PRF+autologous membranes were used to cover tension-free primary flaps.There was no recurrent infection at 36 mo,and tissue regeneration and would healing occurred.CONCLUSION Debridement with an Er:YAG laser followed by treatment with A-PRF+is effective for the treatment periodontal diseases with bone defects.

APRF和CGF提高行上颌窦外提升种植术患者成骨能力的作用研究

目的:研究浓缩生长因子(CGF)和改良富血小板纤维蛋白(APRF)对进行上颌窦外提升种植术患者成骨能力的影响。方法:选择2021年1月—2022年1月到我院进行诊治的上颌磨牙缺失、进行上颌窦外提升种植术且RBH在2~4mm之间的患者20例,随机分为APRF组和CGF组,每组10例。两组患者均进行上颌窦外提升种植术,APRF组患者将APRF层剪碎混合Bio-Oss骨粉填入提升后的上颌窦窦底和上颌窦黏膜的骨板之间,CGF组患者将CGF层剪碎混合Bio-Oss骨粉填入提升后的上颌窦窦底和上颌窦黏膜的骨板之间。对患者的骨密度值(HU)、种植体边缘骨水平变化和存留率进行表征。结果:治疗前,APRF组和CGF组患者的骨密度值相似(P>0.05);术后2个月,两组植骨区骨密度值相对治疗前有明显升高(P<0.05);术后4个月,CGF组密度值高于APRF组,其中APRF组骨密度接近术前骨密度值(P>0.05);术后6个月,两组骨密度值相似(P>0.05),且APRF组与术前基本一致(P>0.05)。APRF组有1例患者种植体在2期修复时出现松动进行拔除,其余患者种植体均成功,APRF组种植体存留率为90%,CGF组种植体存留率为100%。术后2个月,两组患者种植体近中和远中边缘骨水平相似(P>0.05);术后4个月和6个月,APRF组患者种植体近远中边缘骨水平小于CGF组(P<0.05)。术后即刻,两组患者骨高度相似(P>0.05);术后2个月和4个月,APRF组患者的骨高度低于CGF组(P<0.05);但术后6个月,两组患者的骨高度基本一致(P>0.05)。术后2个月和4个月,CGF组患者的ISQ优于APRF组(P<0.05);但术后6个月,两组患者的ISQ基本一致(P>0.05)。结论:APRF和CGF应用于上颌窦外种植提升术患者均具有较好的成骨能力,其中CGF效果优于APRF。

A-PRF联合Bio-Oss对种植体周围骨缺损的修复效果实验研究

目的探讨改良型富血小板纤维蛋白(A-PRF)联合Bio-Oss对种植体周围骨缺损的修复效果。方法12只新西兰大白兔建立下颌骨缺损模型,在每只大白兔双侧下颌骨制备6个骨缺损孔,并分别植入A-PRF与Bio-Oss骨粉2∶1混合物(A组)、1∶1混合物(B组)、1∶2混合物(C组)、空白对照(D组)、单独植入A-PRF(E组)、单独植入Bio-Oss骨粉(F组),于植入后4、8、12周处死动物,行大体观察、影像学及组织学观察,并对成骨效果进行分析。结果术后4周,D组可见纤维结缔组织围绕,A组、E组骨质完全覆盖螺纹钉,其余3组出现不同程度骨质覆盖,术后8、12周相同部位种植体表面骨质覆盖增厚。术后4、8、12周骨体积分数A组>E组>B组>C组>F组>D组(P<0.05)。术后4周,A组有新生血管、骨基质形成,骨小梁钙化良好,有大量新骨形成;术后8、12周,A组骨小梁融合成岛状,可见不同程度的板状骨。术后4、8、12周骨形成率A组>E组>B组>C组>F组>D组(P<0.05)。结论A-PRF与Bio-Oss混合物具有良好骨缺损修复效果,A-PRF与Bio-Oss 2∶1混合物成骨效果更佳,可提高种植体骨愈合能力。

肩关节镜不同入路方式在创伤性肩关节脱位中的应用效果及安全性

目的探讨肩关节镜不同入路方式在创伤性肩关节脱位中的应用效果及安全性。方法回顾性分析2018年6月—2021年6月收治的创伤性肩关节脱位102例的临床资料,将行肩关节镜前方改良单入路手术51例设为改良入路组,行肩关节镜前方双入路手术51例设为传统入路组。对比2组围术期指标、并发症、手术效果及手术前后凝血纤溶参数[纤维蛋白原(FIB)、D-二聚体(D-D)、纤维蛋白降解产物(FDP)]、肩关节活动度、Constant-Murley肩关节功能评分。结果改良入路组术中出血量少于传统入路组,住院时间短于传统入路组(P<0.01);术后1 d,改良入路组血浆FIB、D-D、FDP水平低于传统入路组(P<0.01);术后6、12个月,2组肩关节前屈、外展上举活动度大于术前,Constant-Murley肩关节功能评分高于术前(P<0.05);2组优良率和并发症发生率比较差异无统计学意义(P>0.05)。结论肩关节镜不同入路方式在创伤性肩关节脱位中的效果相当,其中肩关节镜前方改良单入路手术有助于减少术中出血量,缩短住院时间,且对凝血纤溶系统影响较小。

基于JNK通路研究改良型富血小板纤维蛋白与β-三磷酸钙复合物诱导成骨的机制

目的:基于c-Jun氨基末端蛋白激酶(JNK)通路研究改良型富血小板纤维蛋白(A-PRF)与β-三磷酸钙(β-TCP)复合物对兔股骨缺损区域的诱导成骨效果,为临床治疗骨缺损提供实验基础。方法:选取24只雄性新西兰大白兔构建股骨缺损模型,动物分为模型组、1:1复合物组(A-PRF:β-TCP=1:1)、2:1复合物组(A-PRF:β-TCP=2:1)与4:1复合物组(A-PRF:β-TCP=4:1),每组各6只。模型组对骨缺损区域不作填充处理,复合物组填充对应的材料,8周后处死动物收集指标。肉眼观察骨缺损区域的修复情况,经苏木精-伊红(HE)染色观察新生骨组织修复情况,以酶联免疫吸附法(Elisa)检测血清中碱性磷酸酶(ALP)和骨钙素(OCN)的含量,以蛋白质免疫印迹法(WesternBlot)检测骨组织中骨形成蛋白9(BMP-9)、JNK与p-JNK蛋白的表达情况。结果:与模型组相比,复合物组填充后骨缺损区域新生血管增多,成骨效果明显,炎症反应少,血清中ALP与OCN含量显著升高,骨组织中BMP-9与p-JNK蛋白表达水平显著升高(P<0.05)。结论:A-PRF与β-TCP复合物能通过激活JNK通路、诱导BNP-9蛋白表达,促进骨缺损后诱导成骨,当复合物比例为2:1时效果最佳。