Clinical Efficacy of GBR Technique Combined with Temporary Bridgework-Guided Gingival Contouring in Treating Upper Anterior Tooth Loss with Labial Bone Defects

Objective:To investigate the clinical effect of the guided bone regeneration(GBR)technique combined with temporary bridgework-guided gingival contouring in treating upper anterior tooth loss with labial bone defects.Methods:From July 2023 to April 2024,80 patients with upper anterior tooth loss and labial bone defects were admitted to the hospital and selected as evaluation samples.They were divided into an observation group(n=40)and a control group(n=40)using a numerical table lottery scheme.The control group received treatment with the GBR technique,while the observation group received treatment with the GBR technique combined with temporary bridges to guide gingival contouring.The two groups were compared in terms of clinical red aesthetic scores(PES),labial alveolar bone density,labial bone wall thickness,gingival papillae,gingival margin levels,and patient satisfaction.Results:The PES scores of patients in the observation group were higher than those in the control group after surgery(P<0.05).The bone density of the labial alveolar bone and the thickness of the labial bone wall in the observation group were higher than those in the control group.The levels of gingival papillae and gingival margins were lower in the observation group after surgery(P<0.05).Additionally,patient satisfaction in the observation group was higher than in the control group(P<0.05).Conclusion:The GBR technique combined with temporary bridge-guided gingival contouring for treating upper anterior tooth loss with labial bone defects can improve the aesthetic effect of gingival soft tissue,increase alveolar bone density and the thickness of the labial bone wall,and enhance patient satisfaction.This approach is suitable for widespread application in healthcare institutions.

The journey of multifunctional bone scaffolds fabricated from traditional toward modern techniques

As a bone scaffold,meeting all basic requirements besides dealing with other bone-related issues-bone cancer and accelerated regeneration-is not expected from traditional scaffolds,but a newer class of scaffolds called multifunctional.From a clinical point of view,being a multifunctional scaffold means reducing in healing time,direct costs-medicine,surgery,and hospitalization-and indirect costs-loss of mobility,losing job,and pain.The main aim of the present review is following the multifunctional bone scaffolds trend to deal with both bone regeneration and cancer therapy.Special consideration is given to different fabrication techniques which have been applied to yield these materials spanning from traditional to modern ones.Moreover,the hierarchical structure of bone plus bone cancers and available medicines to them are introduced to familiarize the potential reader of review with the pluri-disciplinary essence of the field.Eventually,a brief discussion relating to the future trend of these materials is provided.

Thansgenic peanut plants obtained by particle bombardment via somatic embryogenesis regeneration system

After pre-culture and treatment of osmosis, cotyledons of immature peanut (Arachis hypogaea L.) zygotic embryos were transformed via particle bombardment with a plasmid containing a chimeric hph gene conferring resistance to hygromycin and a chimeric intron-gus gene. Selection for hygromycin resistant calluses and somatic embryos was initiated at 10th d post-bombardment on medium containing 10-25 mg/L hygromycin. Under continuous selection, hygromycin resistant plantlets were regenerated from somatic embryos and were recovered from nearly 1.6% of the bombarded cotyledons. The presence and integration of foreign DNA in regenerated hygromycin resistant plants was confirmed by PCR (polymerase chain reaction) for the intron-gus gene and by Southern hybridization of the hph gene. GUS enzyme activity was detected in leaflets from transgenic plants but not from control, non-transformed plants. The production of transgenic plants are mainly based on a newly improved somatic embryogenesis regeneration system developed by us.

Fault Waveform Regenerator and Its Digital Closed-Loop Modification Technique

In order to provide a novel and more effective alternative to the commonly used relay protection testing device that outputs only the sinusoidal testing signals, the concept of fault waveform regenerator is proposed in this paper, together with its hardware structure and software flow chart. Fault waveform regenerator mainly depends on its power amplifiers (PAs) to regenerate the fault waveforms recorded by digital fault recorder (DFR). To counteract the PA’s inherent nonlinear distortions, a digital closed-loop modification technique that is different from the predistortion technique is conceived. And the experimental results verify the effectiveness of the fault waveform regenerator based on the digital closed-loop modification technique.

Scientific Viewpoints with Emphasis on Dermal Cellular Regeneration in Wound Sites

The human dermis presents an ongoing problem for regenerative medicine. Current medical management uses various acellular dermal matrices on wound sites. The challenge for scientists is to examine, then to question accepted conventional wisdom and to present new concepts. In this paper, Autologous Cell Therapy will be described by using cell culture of autologous dermal fibroblasts and their extracellular matrix as a foundation for rebuilding the dermis in conditioned wound beds. This proposal seems to create a conflict with the medical approach to keeping a wound bed “moist”.

生物材料在Masquelet技术中的应用

背景:骨缺损的修复和治疗难度较高,其临床治疗方案多样,Masquelet技术是一种成功率高、疗效可靠且已经应用于临床的治疗方法,但是该技术目前机制并未完全明确,且该技术在临床应用上还存在一些问题,技术仍然不是特别成熟。目的:对现阶段在Masquelet技术改进的研究中所应用的生物材料进行整理与归纳,为该技术的进一步发展提供思路与参考。方法:通过计算机在中国知网和PubMed数据库中检索2013年1月至2022年11月的相关文献,中文检索词为“Masquelet技术,膜诱导技术,诱导膜,生物材料,骨缺损”;英文检索词为“Masquelet technique,Induced membrane technique,Induced membrane,biomaterial,Bone defect”,对最终纳入符合标准的58篇文献进行综述。结果与结论:①Masquelet技术的出现与不断发展为治疗骨缺损提供了一种治疗策略,有些研究者将研究方向放在研究出更好的间隔材料、自体骨的替代材料和与诱导膜具有相同性能的膜材料上,以便于将两阶段术式简化,缩短治疗时间和减轻患者的痛苦。②硫酸钙、硅胶、聚乳酸-羟基乙酸共聚物和聚丙烯在动物实验或者临床应用中可以替代聚甲基丙烯酸甲酯骨水泥形成诱导膜,且各有优势,但是与预想不同,常见的钛和聚乙烯醇海绵反而不能在这一步中作为聚甲基丙烯酸甲酯骨水泥的替代材料。③自体骨的替代材料多种多样,同种异体骨、β-磷酸三钙、可吸收性明胶海绵、α-硫酸钙半水合物、生物活性玻璃、钛和钽等材料都在临床或基础实验中证明了其可以在术式第二阶段中减少自体松质骨植骨量的能力,其中同种异体骨、β-磷酸三钙、生物活性玻璃、钛和钽等材料可替代自体骨作为移植物,其余材料需与自体骨混合使用。④仿生诱导膜、人羊膜、人脱细胞真皮、聚四氟乙烯甚至自体皮质骨通过实验证实了其与诱导膜具有相似性能。⑤现阶段,众多生物材料在该技术中的应用与研究大多数仍存在于基础研究阶段,尚未应用于临床实践或大范围推广,但是上述材料可为Masquelet技术机制的探究、术式的改进与临床应用提供更充分的理论依据和新思路。

可持续理念下酉水流域竹编技艺的活化与再生研究

随着原生消费市场的消亡与现代消费理念、审美观念的变化,酉水流域竹编产品的价值日渐式微,篾匠传承面临断层危机。本文基于艺术人类学视角,从人和技艺两个维度分析酉水流域竹编传承所面临的问题与发展机遇。在可持续理念下,将现代设计美学融入竹编产品创新生产,让竹编技艺重新回归民众日常生活,并通过数字化手段增强技艺生命力,重塑当代生活需要与精神价值需求。研究结果有助于推动地方文化繁荣与经济增长,为非遗传统技艺的可持续创新与发展提供参考。

Research Progress of Deep Eutectic Solvents in Extraction of Plant Flavonoids

As a new type of green solvents,deep eutectic solvents(DESs)have the advantages of strong extraction ability,designability,simple preparation,low price,recoverability and biodegradation,and show great application potential in the field of plant flavonoid extraction.In this paper,the definition,classification and preparation methods of DESs were introduced.The effects of DES composition,molar ratio of DES components,water content of DES systems,liquid-material ratio,extraction temperature,extraction time and extraction auxiliary techniques on the extraction yield of plant flavonoids were expounded.The recycling methods of DESs were summarized.Existing problems of DESs in the field of plant flavonoids extraction were pointed out,and further research direction and trend were analyzed and prospected.

The use of hydrogel microspheres as cell and drug delivery carriers for bone,cartilage,and soft tissue regeneration

Bone,cartilage,and soft tissue regeneration is a complex process involving many cellular activities across various cell types.Autografts remain the“gold standard”for the regeneration of these tissues.However,the use of autografts is associated with many disadvantages,including donor scarcity,the requirement of multiple surgeries,and the risk of infection.The development of tissue engineering techniques opens new avenues for enhanced tissue regeneration.Nowadays,the expectations of tissue engineering scaffolds have gone beyond merely providing physical support for cell attachment.Ideal scaffolds should also provide biological cues to actively boost tissue regeneration.As a new type of injectable biomaterial,hydrogel microspheres have been increasingly recognised as promising therapeutic carriers for the local delivery of cells and drugs to enhance tissue regeneration.Compared to traditional tissue engineering scaffolds and bulk hydrogel,hydrogel microspheres possess distinct advantages,including less invasive delivery,larger surface area,higher transparency for visualisation,and greater flexibility for functionalisation.Herein,we review the materials characteristics of hydrogel microspheres and compare their fabrication approaches,including microfluidics,batch emulsion,electrohydrodynamic spraying,lithography,and mechanical fragmentation.Additionally,based on the different requirements for bone,cartilage,nerve,skin,and muscle tissue regeneration,we summarize the applications of hydrogel microspheres as cell and drug delivery carriers for the regeneration of these tissues.Overall,hydrogel microspheres are regarded as effective therapeutic delivery carriers to enhance tissue regeneration in regenerative medicine.However,significant effort is required before hydrogel microspheres become widely accepted as commercial products for clinical use.

乳化沥青冷再生基层施工技术研究

为提高公路维修过程中产生的铣刨废旧沥青混合料利用率,结合实际工程对乳化沥青冷再生技术展开研究。采用5种乳化沥青用量(3.2%、3.7%、4.2%、4.7%和5.2%)和3种水泥剂量(1.0%、1.5%和2.0%)的混合料进行力学性能试验。试验结果得到,采用水泥剂量为1.5%,乳化沥青用量为4.2%,拌和用水量为5.1%时,混合料性能最佳,此时混合料残留稳定度大于75%,动稳定度在5000~6000次/mm,7 d、28 d无侧限抗压强度达到3~5 MPa,路用性能指标均满足技术要求。

帐篷式骨增量技术用于修复上前牙单牙缺失的美学效果及其对牙槽骨宽度的影响

目的:探究帐篷式骨增量技术对上前牙单牙缺失患者的治疗效果及对牙槽骨宽度的影响。方法:选取汉滨区第三人民医院2020年2月-2021年2月收治的80例上前牙单牙缺失患者为研究对象,按治疗方法不同分为研究组(帐篷式骨增量技术)38例和对照组(引导骨再生技术)42例,比较两组的种植情况、红白美学指数评分、牙槽骨宽度、龈沟液骨代谢指标、牙周情况以及术后并发症发生率。结果:种植体植入3个月后,两组患者均无种植体松动、脱落等现象,影像学检查无透影区,种植成功率均为100%;术后6个月,研究组种植区周围红色美学指数评分高于对照组(P<0.05),两组白色美学指数评分差异无统计学意义(P>0.05)。术后6个月,两组患者牙槽骨宽度均显著增加(P<0.05),且研究组术后6个月牙槽骨宽度高于对照组(P<0.05);两组龈沟液中骨保护素(Osteoprotegerin,OPG)水平显著降低,骨桥蛋白(Osteopontin,OPN)水平显著升高(P<0.05),研究组OPG水平高于对照组(P<0.05),OPN水平低于对照组(P<0.05);两组患者牙龈指数、牙菌斑指数以及探诊深度差异均无统计学意义(P>0.05)。两组术后并发症发生率比较差异无统计学意义(P>0.05)。结论:帐篷式骨增量技术应用于上前牙单牙缺失种植成功率较高,能提高修复后美学效果,增加牙槽骨宽度,减缓骨吸收,术后并发症及对牙周影响均较小,值得推广应用。

The intra-neuroendoscopic technique: a new method for rapid removal of acute severe intraventricular hematoma

The mortality rate of acute severe intraventricular hematoma is extremely high, and the rate of disability in survivors is high. Intraventricular hematoma has always been a difficult problem for clinical treatment. Although minimally invasive endoscopic hematoma evacuation is widely used to treat this disease, the technique still has room for improvement. Equipment for the intra-neuroendoscopic technique（INET） consists of two of our patented inventions： a transparent sheath（Patent No. ZL 200820046232.0） and a hematoma aspirator（Patent No. ZL 201520248717.8）. This study explored the safety and efficacy of INET by comparing it with extraventricular drainage in combination with urokinase thrombolytic therapy. This trial recruited 65 patients with severe intraventricular hemorrhage, including 35（19 men and 16 women, aged 53.2 ± 8.7 years） in the INET group and 30（17 men and 13 women, aged 51.5 ± 7.9 years） in the control group（extraventricular drainage plus urokinase thrombolytic therapy）. Our results showed that compared with the control group, the INET group exhibited lower intraventricular hemorrhage volumes, shorter intensive care-unit monitoring and ventricular drainage-tube placement times, and fewer incidences of intracranial infection, secondary bleeding, and mortality. Thus, the prognosis of survivors had improved remarkably. These findings indicate that INET is a safe and efficient new method for treating severe intraventricular hematoma. This trial was registered with Clinical Trials.gov（NCT02515903）.

Ilizarov bone transport combined with the Masquelet technique for bone defects of various etiologies (preliminary results)

BACKGROUND The Ilizarov bone transport(IBT)and the Masquelet induced membrane technique(IMT)have specific merits and shortcomings,but numerous studies have shown their efficacy in the management of extensive long-bone defects of various etiologies,including congenital deficiencies.Combining their strong benefits seems a promising strategy to enhance bone regeneration and reduce the risk of refractures in the management of post-traumatic and congenital defects and nonunion that failed to respond to other treatments.AIM To combine IBT and IMT for the management of severe tibial defects and pseudarthrosis,and present preliminary results of this technological solution.METHODS Seven adults with post-traumatic tibial defects(subgroup A)and nine children(subgroup B)with congenital pseudarthrosis of the tibia(CPT)were treated with the combination of IMT and IBT after the failure of previous treatments.The mean number of previous surgeries was 2.0±0.2 in subgroup A and 3.3±0.7 in subgroup B.Step 1 included Ilizarov frame placement and spacer introduction into the defect to generate the induced membrane which remained in the interfragmental gap after spacer removal.Step 2 was an osteotomy and bone transport of the fragment through the tunnel in the induced membrane,its compression and docking for consolidation without grafting.The outcomes were retrospectively studied after a mean follow-up of 20.8±2.7 mo in subgroup A and 25.3±2.3 mo in subgroup B.RESULTS The“true defect”after resection was 13.3±1.7%in subgroup A and 31.0±3.0%in subgroup B relative to the contralateral limb.Upon completion of treatment,defects were filled by 75.4±10.6%and 34.6±4.2%,respectively.Total duration of external fixation was 397±9.2 and 270.1±16.3 d,including spacer retention time of 42.4±4.5 and 55.8±6.6 d,in subgroups A and B,respectively.Bone infection was not observed.Postoperative complications were several cases of pin-tract infection and regenerate deformity in both subgroups.Ischemic regeneration was observed in two cases of subgroup B.Complications were corrected during the course of treatment.Bone union was achieved in all patients of subgroup A and in seven patients of subgroup B.One non-united CPT case was further treated with the Ilizarov compression method only and achieved union.After a follow-up period of two to three years,refractures occurred in four cases of united CPT.CONCLUSION The combination of IMT and IBT provides good outcomes in post-traumatic tibial defects after previous treatment failure but external fixation is longer due to spacer retention.Refractures may occur in severe CPT.

水平内褥式缝合在组织增量术中的实践要点

良好的缝合能够起到固定、关闭创口的作用,是保证创口良好愈合的基本条件。牙缺失种植位点的软硬组织再生术,无张力的对位缝合对于组织的再生十分重要。水平内褥式缝合与常规水平褥式缝合类似,通过两针进针、两针出针形成一个能被切口平分的矩形,水平内褥式缝合在矩形的基础上,强调经过切口的缝线需位于切口下方,因此创缘的外翻为该术式亮点。水平内褥式缝合通过缝合和打结可以紧密贴合受区组织与移植物,实现胶原膜、根向复位瓣、软组织移植替代物的固定,关闭创口还能进一步释放创缘张力。在满足固定、关闭创口的基本需求之外,水平内褥式缝合还能起到应力中断作用,降低周围肌肉牵拉对术区的干扰,搭配常规间断缝合能更精细调节创口张力,因此在种植相关再生性手术中应用潜力大。笔者基于临床经验和文献,阐述水平内褥式缝合在组织增量术区应用的优势,尝试明确进出针位点及缝线与组织和切口的空间关系,提出命名根据,有利于同行交流与实践。

改良骨劈开技术联合引导骨再生术在牙槽骨骨缺损种植修复中的应用疗效评估

目的浅析改良骨劈开技术与引导骨再生术(guided bone regeneration,GBR)联用治疗牙槽骨骨缺损患者对其美学效果与骨吸收情况的影响。方法选取2018年8月至2019年6月在宁波市妇女儿童医院口腔科就诊的120例牙槽骨骨缺损患者,依据牙骨缺损情况和牙周探诊目测法分成观察组(n=68)与对照组(n=52),对照组予以GBR治疗,观察组在对照组的基础上联用改良骨劈开技术治疗;依据红色美学指数(red aesthetic index,PES)与白色美学指数(white aesthetic index,WES)评估两组在修复术结束当天与负重随访6个月时的美学效果,以及负重随访6个月骨吸收的情况,比较手术前、负重6个月后种植处牙槽骨的骨壁厚度的变化,以及负重随访6个月的满意度。结果负重随访6个月,观察组PES与WES评分皆显著高于对照组(P<0.05),观察组远中与近中边缘的骨吸收量皆显著少于对照组(P<0.05),观察组10mm、7mm与1mm点位牙槽骨的骨壁厚度皆显著高于对照组(P<0.05),观察组满意度显著优于对照组(P<0.05)。结论牙槽骨缺损患者予以改良骨劈开技术联合GBR治疗的美学效果显著,可有效改善骨吸收情况,且满意度更高,值得应用与推广。

泡沫沥青冷再生技术在罗宁高速公路大修中的应用

文中以罗宁高速公路为例,对高速公路的基本情况和路面病害进行了分析,并根据该项目的具体情况制定泡沫沥青冷再生施工方案,以有效提高路面质量。

正畸配合牙槽骨再生术治疗成人中重度牙周炎错牙合畸形临床疗效分析

目的:探究正畸配合牙槽骨再生治疗成人中重度牙周炎错牙合畸形的临床疗效。方法:选取笔者医院2017年1月-2021年1月收治的102例中重度牙周炎错牙合畸形成人患者,采取正畸配合牙槽骨再生治疗。比较患者治疗前后牙周情况、牙齿松动度、咬合关系及美观性。结果:相较于治疗前,患者治疗后3个月及治疗后6个月的牙周探诊深度、附着丧失、龈沟出血指数值均逐渐减小,牙齿松动Ⅱ度及Ⅲ度例数、咬合时间、左右侧咬合力平衡度均逐渐减少(均P<0.05),牙齿松动Ⅰ度例数及咬合力占最大咬合力百分比均逐渐增加(P<0.05);患者治疗后6个月、治疗后1年,IOTN-AC美观评分、上下唇角及软组织面角均较治疗前逐渐降低(P<0.05),鼻唇角、颏唇沟角均逐渐增大(P<0.05)。结论:正畸配合牙槽骨再生治疗中重度牙周炎错牙合畸形患者效果显著,可有效改善患者牙槽骨吸收及牙齿松动情况,促进患者咬合功能恢复,提升面部美观度。

On the comparison of particle regeneration technique and volume adaptive scheme in the compressible flow based on smoothed particle hydrodynamics

The collapse of a cavitation bubble is an interesting topic and it has many applications in the engineering fields.Due to its compressible nature,the modelling of a cavitation bubble is not easy by the Lagrangian method,like the smoothed particle hydrodynamics(SPH),as there is large variation of particle volume.Currently,there are two kinds of method that have been proposed to deal with this problem:the particle regeneration technique(PRT)and the volume adaptive scheme(VAS).They have all been validated via several numerical tests of compressible flow in the past studies.As is based on totally different concept,the ultimate simulation results and properties may differ.Here,we intend to compare these two methods based on the Riemann-based SPH solver with monotone upwind-centered scheme for conservation laws(MUSCL)reconstruction via several numerical tests.The characteristics of these two methods are discussed and the applicable scope for them are also commented for further usage.

寒冷地区大掺量温再生沥青路面施工技术研究

为提高寒冷地区大掺量温再生沥青路面施工质量,依托二广高速二连浩特至赛汉塔拉段公路工程项目,开展了室内温拌再生沥青混合料目标配合比和最佳油石比设计及路用性能测试,试验段生产配合比设计,试验段铺筑与施工总结等研究。结果表明:温拌再生剂的添加在保证其混合料路用性能的基础上可以有效增加RAP掺配比例,随着RAP掺配比例的增加,沥青混合料水稳性能和低温抗裂性能逐渐下降,高温抗车辙性能逐渐增强;大掺量温再生沥青混合料适合于中下面层等承重层,一方面可以有效避免上面层低温开裂和水损害,另一方面可以增强中下面层抗车辙能力;通过试验段的铺筑可以为寒冷地区大掺量温再生沥青路面施工提供一定的技术参考。

再生蛋白质纤维的特性及研究进展

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