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| 1 | Role of the Ilizarov non-free bone plasty in the management of long bone defects and nonunion: Problems solved and unsolved显示文摘BACKGROUND Ilizarov non-free bone plasty is a method of distraction osteogenesis using the Ilizarov apparatus for external fixation which originated in Russia and was disseminated across the world. It has been used in long bone defect and nonunion management along with free vascularized grafting and induced membrane technique. However, the shortcomings and problems of these methods still remain the issues which restrict their overall use.AIM To study the recent available literature on the role of Ilizarov non-free bone plasty in long bone defect and nonunion management, its problems and the solutions to these problems in order to achieve better treatment outcomes.METHODS Three databases(Pub Med, Scopus, and Web of Science) were searched for literature sources on distraction osteogenesis, free vascularized grafting and induced membrane technique used in long bone defect and nonunion treatment within a five-year period(2015-2019). Full-text clinical articles in the English language were selected for analysis only if they contained treatment results,complications and described large patient samples(not less than ten cases for congenital, post-tumor resection cases or rare conditions, and more than 20 cases for the rest). Case reports were excluded.RESULTS Fifty full-text articles and reviews on distraction osteogenesis were chosen.Thirty-five clinical studies containing large series of patients treated with this method and problems with its outcome were analyzed. It was found that distraction osteogenesis techniques provide treatment for segmental bone defects and nonunion of the lower extremity in many clinical situations, especially in complex problems. The Ilizarov techniques treat the triad of problems simultaneously(bone loss, soft-tissue loss and infection). Management of tibial defects mostly utilizes the Ilizarov circular fixator. Monolateral fixators are preferable in the femur. The use of a ring fixator is recommended in patients with an infected tibial bone gap of more than 6 cm. High rates of successful treatment were reported by the authors that ranged from 77% to 100% and depended on the pathology and the type of Ilizarov technique used. Hybrid fixation and autogenous grafting are the most applicable solutions to avoid after-frame regenerate fracture or deformity and docking site nonunion.CONCLUSION The role of Ilizarov non-free bone plasty has not lost its significance in the treatment of segmental bone defects despite the shortcomings and treatment problems encountered. | Dmitry Y Borzunov Sergei N Kolchin Tatiana A Malkova | 2020 | World Journal of Orthopedics2020，11，6： | 13 |
| 2 | International recognition of the Ilizarov bone reconstruction techniques: Current practice and research (dedicated to 100th birthday of G. A. Ilizarov)显示文摘The Ilizarov method is one of the current methods used in bone reconstruction.It originated in the middle of the past century and comprises a number of bone reconstruction techniques executed with a ring external fixator developed by Ilizarov GA.Its main merits are viable new bone formation through distraction osteogenesis,high union rates and functional use of the limb throughout the course of treatment.The study of the phenomenon of distraction osteogenesis induced by tension stress with the Ilizarov apparatus was the impetus for advancement in bone reconstruction surgery.Since then,the original method has been used along with a number of its modifications developed due to emergence of new fixation devices and techniques of their application such as hexapod external fixators and motorized intramedullary lengthening nails.They gave rise to a relatively new orthopedic subspecialty termed“limb lengthening and reconstruction surgery”.Based on a comprehensive literature search,we summarized the recent clinical practice and research in bone reconstruction by the Ilizarov method with a special focus on its modification and recognition by the world orthopedic community.The international influence of the Ilizarov method was reviewed in regard to the origin country of the authors and journal’s rating.The Ilizarov method and other techniques based on distraction osteogenesis have been used in many countries and on all populated continents.It proves its international significance and confirms the greatest contribution of Ilizarov GA to bone reconstruction surgery. | Tatiana A Malkova Dmitry Y Borzunov | 2021 | World Journal of Orthopedics2021，12，8： | 8 |
| 3 | Ilizarov bone transport combined with the Masquelet technique for bone defects of various etiologies (preliminary results)显示文摘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. | Dmitry Y Borzunov Sergey N Kolchin Denis S Mokhovikov Tatiana A Malkova | 2022 | World Journal of Orthopedics2022，13，3： | 6 |
| 4 | What operation for recurrent rectal prolapse after previous Delorme's procedure? A practical reality显示文摘AIM: To report our experience with perineal repair(Delorme's procedure) of rectal prolapse with particular focus on treatment of the recurrence.METHODS: Clinical records of 40 patients who underwent Delorme's procedure between 2003 and 2014 were reviewed to obtain the following data: Gender; duration of symptoms, length of prolapse, operation time, ASA grade, length of post-operative stay, procedure-related complications, development and treatment of recurrent prolapse. Analysis of post-operative complications, rate and time of recurrence and factors influencing the choice of the procedure for recurrent disease was conducted. Continuous variables were expressed as the median with interquartile range(IQR). Statistical analysis was carried out using the Fisher exact test.RESULTS: Median age at the time of surgery was 76 years(IQR: 71-81.5) and there were 38 females and 2 males. The median duration of symptoms was 6 mo(IQR: 3.5-12) and majority of patients presented electively whereas four patients presented in the emergency department with irreducible rectal prolapse. The median length of prolapse was 5 cm(IQR: 5-7), median operative time was 100 min(IQR: 85-120) and median post-operative stay was 4 d(IQR: 3-6). Approximately16% of the patients suffered minor complications such as- urinary retention, delayed defaecation and infected haematoma. One patient died constituting postoperative mortality of 2.5%. Median follow-up was 6.5 mo(IQR: 2.15-16). Overall recurrence rate was 28%(n = 12). Recurrence rate for patients undergoing an urgent Delorme's procedure who presented as an emergency was higher(75.0%) compared to those treated electively(20.5%), P value 0.034. Median time interval from surgery to the development of recurrence was 16 mo(IQR: 5-30). There were three patients who developed an early recurrence, within two weeks of the initial procedure. The management of the recurrent prolapse was as follows: No further intervention(n = 1), repeat Delorme's procedure(n = 3), Altemeier's procedure(n = 5) and rectopexy with faecal diversion(n = 3). One patient was lost during follow up.CONCLUSION: Delorme's procedure is a suitable treatment for rectal prolapse due to low morbidity and mortality and acceptable rate of recurrence. The management of the recurrent rectal prolapse is often restricted to the pelvic approach by the same patientrelated factors that influenced the choice of the initial operation, i.e., Delorme's procedure. Early recurrence developing within days or weeks often represents a technical failure and may require abdominal rectopexy with faecal diversion. | Muhammad A Javed Faryal G Afridi Dmitri Y Artioukh | 2016 | World Journal of Gastrointestinal Surgery2016，8，7： | 4 |
| 5 | Carcinosarcoma of the urinary bladder I an ag- gressive tumor with diverse histogenesis 显示文摘 | DMITRY Y B JANNY H C MANJUNATH S V | 2000 | Arch Path Lab Med2000，124，： | 1 |
| 6 | Hybrid algorithms for digital halftoning and their application to medical imaging显示文摘 | Sandler Eugene A Gusev Dmitri A Milman Gregory Y | 1997 | IEEE Transactions on Computers&Graphics1997，21，1： | 1 |
| 7 | Influence of catalyst pretrentment ona-pinene isomerization over natural clays 显示文摘 | GONUL G DMITRY Y M | 2002 | React Kinet CatalLett2002，75，2： | 1 |
| 8 | Mecha- nisms of Flow Near Surface Electrical Discharge Genera- tion 显示文摘 | Leonov S B Dmitry A Y Gromov V G | 2006 | Vacuum2006，80，11： | 1 |
| 9 | Plasma-induced Ignition and Plasma-assisted Combustion in High-speed Flow 显示文摘 | Sergey B Leonov Dmitry A Y | 2007 | Plasma Source Science and Technology2007，16，： | 1 |
| 10 | Highly dispersed gold on activated carbon fibers for low-temperature CO oxidation显示文摘 | Dmitri A B Igor Y Elena I S | 2004 | J Catal2004，224，： | 1 |
| 11 | The use of reinforced omposite resin cement as compensation for reduced post length 显示文摘 | Nissan J Dmitry Y Assif D | 2001 | Prosthet Dent2001，86，3： | 1 |
| 12 | Influence of catalyst pretrentment on a-pinene isomerization over natural clays显示文摘 | Gonul G Dmitry Y M | 2002 | React Kinet Catal Lett2002，75，2： | 1 |
| 13 | The use of rein forced conposite resin as corpensation for reduced post length显示文摘 | Nissan J Dmitry Y Assif D | 2001 | J Prosthet Dent2001，86，： | 1 |
| 14 | 显示文摘 | DMITRI Y B BRIAN Y C WILLIAM R H | 2002 | J Chromatogr B2002，，： | 1 |
| 15 | Theuse of reinforced composite resin cement as compensation for reduced post lengh显示文摘 | Dmitry Y Assif D | 2001 | J Prosthet Dent2001，86，3： | 1 |
| 16 | Generation of a human embryonic stem cell line stably expressing high levels of the fluorescent protein mCherry显示文摘AIM:The generation and characterization of a human embryonic stem cell (hESC) line stably expressing red fluorescent mCherry protein. METHODS:Lentiviral transduction of a ubiquitously-expressed human EF-1α promoter driven mCherry transgene was performed in MEL2 hESC. Red fluore-scence was assessed by immunofluorescence and flow cytometry. Pluripotency of stably transduced hESC was determined by immunofluorescent pluripotency marker expression, flow cytometry, teratoma assays andembryoid body-based differentiation followed by reverse transcriptase-polymerase chain reaction. Quantification of cell motility and survival was performed with time lapse microscopy. RESULTS:Constitutively fluorescently-labeled hESCs are useful tools for facile in vitro and in vivo tracking of survival, motility and cell spreading on various surfaces before and after differentiation. Here we describe the generation and characterization of a hESC line (MEL2) stably expressing red fluorescent protein, mCherry. This line was generated by random integration of a fluorescent protein-expressing cassette, driven by the ubiquitously-expressed human EF-1α promoter. Stably transfected MEL2-mCherry hESC were shown to express pluripo-tency markers in the nucleus (POU5F1/OCT4, NANOG and SOX2) and on the cell surface (SSEA4, TRA1-60 and TG30/CD9) and were shown to maintain a normal karyotype in long-term (for at least 35 passages) culture. MEL2-mCherry hESC further readily differentiated into representative cell types of the three germ layers in embryoid body and teratoma based assays and, importantly, maintained robust mCherry expression throughout differentiation. The cell line was next adapted to singlecell passaging, rendering it compatible with numerous bioengineering applications such as measurement of cell motility and cell spreading on various protein modified surfaces, quantification of cell attachment to nanoparticles and rapid estimation of cell survival. CONCLUSION:The MEL2-mCherry hESC line conforms to the criteria of bona fide pluripotent stem cells and maintains red fluorescence throughout differentiation, making it a useful tool for bioengineering and in vivo tracking experiments. | Dmitry A Ovchinnikov Jennifer P Turner Drew M Titmarsh Nilay Y Thakar Dong Choon Sin Justin J Cooper-White Ernst J Wolvetang | 2012 | World Journal of Stem Cells2012，4，7： | 1 |
| 17 | Structured but not over-structured:Woven active carbon fibre matt catalyst显示文摘 | JYRI P M JEANNETTE A DMITRY Y | 2005 | Catal Today2005，105，： | 1 |
| 18 | Mechanisms of flow control by near surface electrical discharge generation 显示文摘 | Leonov S B Dmitry A Y Gromov V G | 2006 | Vacuum2006，80，11： | 1 |
| 19 | The use of reinforced composite resin cement as compensation for reduced post length 显示文摘 | Nissan J Dmitry Y Assif D | 2001 | J Prosthet Dent2001，86，3： | 1 |
| 20 | High-loaded nickel-silica catalysts for hydrogenation prepared by sol-gel Route:structure and catalytic behavior显示文摘 | Marina A E Dmitry Y E | 2003 | Applied CatalysisA:General2003，，245： | 1 |
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