[A device for the spinal column treatment].

An original device for spinal column compression in recumbent patient simulating the load exerted by the body weight in the standing position is described. The device can be used in pediatric orthopedics to simulate the standing position in patients undergoing the procedure for diagnosis of scoliosis with a bone densitometer.

[An orthopedic table for reading in recumbent position].

An orthopedic table for pediatric spinal patients, which allows reading in recumbent position, is described. The table can be used, for example, in boarding schools for children with scoliosis.

[Spectral data of the elements of bone tissue in patients with hip joint implants].

The results of study of the elemental composition of bone tissue in patients with hip joint implants are described. The study was based on spectral analysis and correlation-regression analysis. It was shown that the elemental composition of bone tissue is not affected by long-term contact with the implant. This result should be taken into account in prophylaxis of implant instability.

[A method for assembling hip joint endoprosthesis with an isolating clutch].

Wear products formed in the mobility element of an implant lead to metallosis and, as a result, resorption of osseous tissue around the implant. This makes the implant unstable and brings about the necessity for surgical reintervention. An endoprosthesis with a clutch for isolation of the friction unit is suggested. The clutch prevents penetration of wear particles into adjacent tissues. A procedure for mechanical assembly of the endoprosthesis is described.

[The use of zirconium for implants in traumatology and orthopedics]. / Primenenie tsirkoniia dlia implantatov v travmatologii i ortopedii.

The use of new promising materials for implanting elements in traumatology and orthopedics is under discussion in the paper. Steel pins coated with zirconium do not cause any inflammatory complications when applied. The initial results of using the zirconium-coated implants offer the challenge for using such devices in future.

[Portable device for ribs traction]. / Portativnoe ustroistvo dlia vytiazheniia reber.

Described in the paper is a portable device designed by the author for the traction of ribs in the complex treatment of multiple rib fractures. It is autonomous and easy in use. The devise does not damage the skin and tissues.

[Results of testing a non-protrusion hip joint prosthesis]. / Rezul'taty aprobatsii neprotruzionnogo éndoproteza tazobedrennogo sustava.

To prevent protrusion of the socket of an endoprosthesis into the pelvis, an experimental nonprotrusion endoprosthesis has been designed and tested. The endoprosthesis is of novel design; however, its production is rather simple. The efficiency of its use is strongly evidenced by reasonably long-term experiments. Comparing the results of use of a routine design endoprosthesis versus the nonprotrusion one under the same loading conditions has shown that the novel endoprosthesis is better.

[Experimental testing of an isolating-clutch endoprosthesis of the hip joint: the first results]. / Pervye rezul'taty éksperimental'noi aprobatsii éndoproteza tazobedrennogo sustava s izoliruiushchei muftoi.

The paper presents the results of experimental tests of a new endoprosthesis. The study is devoted to the important issue the prevention on hip joint endoprosthetic instability occurring due to metallosis and its tissue responses. The prosthesis has the new design element an artificial capsule that protects tissue from metallosis. Experimental data were obtained by clinical observations of surgery-undergone dogs aged under a year and by X-ray, morphological and spectral studies. That the artificial capsule is highly effective in preventing the instability of the prosthesis and that the function of a limb is not limited by the capsule are shown.

[Mineral density of the femoral diaphysis after hip prosthesis implantation]. / Mineral'noe nasyshchenie diafiza bedrennoi kosti posle éndoprotezirovaniia tazobedrennogo sustava.

The aseptic instability of endoprostheses, which occurs after their good operation, is a severe complication. All developed countries study this problem from different points of view. This paper presents the data of up to 5-year follow-ups of the mineral saturation of the microstructures of the hip bone diaphysis during endoprosthesis. The paper has been the only to be performed by latest techniques in the former Soviet Union. It is of great interest for researchers who are engaged in searching materials for endoprostheses, for their designers. It is also useful for surgeons in solving the problems how to raise patients after surgery and in giving further recommendations.

[Resorption of bone tissue when titanium fixators are used]. / Rezorbtsiia kostnoi tkani pri ispol'zovanii titanovykh fiksatorov.

The paper compares different methods of inserting titanium fixatives into the femur. The bone was either unaffected or osteotomized. Clinical, X-ray, morphological, and spectral studies were performed. Experimental findings led to the conclusion that the density of fixative adhesion and delayed load are of great significance for adhesion of canine femoral fragments and for the resistance of osseous wound surface. The cortical bone is more resistant to resorption upon mechanical exposure. When titanium fixatives are used there is metallosis that appear as small traces and fails to significantly affect osseous tissue resorption.

[Results of spectral determination of metals in human tissues adjacent to K.M. Sivash's endoprosthesis]. / Rezul'taty spektral'nogo opredeleniia metallov v tkaniakh cheloveka, granichashchikh s éndoprotezom K.M. Sivasha.

The paper presents the data of semiquantitative determination of metals in the tissues surrounding the total titanium-comochromium endoprosthesis of the Sivash system. The prostheses of this design which have a point of metal-metal friction have been used in the past 30 years. It has been shown that chromium and cobalt accumulate constantly and in great quantities, molybdenum and tin do less frequently and in lower quantities. Seventy tissue specimens were obtained from 20 patients followed up for 3 weeks to 15-19 years. The fine, highly sensitive method, emission spectral analysis, used by procedure developed by the Moscow Forensic Bureau of Experts was chosen. The study was undertaken to determine the association of the severity of metallosis with the aseptic instability of prostheses. However, there was no strong evidence for this: commensurable quantities of metals were found when permanent and temporary prostheses had been used. The author considers that the patients have not survived yet to have metallic instability that could have developed in some of them in the later periods of endoprosthesis use. Based on this and early studies, it is concluded that instability in the given periods is a result of mechanical action of some parts of the prostheses on bony formations. The findings show that the severity of metallosis depends on the number of cycles of prosthesis loading, which can be calculated by the duration of prosthesis use and the number of kilometers covered by the patient every day. The ascertained number of cycles may be correlated with the severity of metallosis expressed in arbitrary units.

[Flocking hip joint endoprosthesis]. / Flokirovannyi éndoprotez tazobedrennogo sustava.

The author indicates the similarity of a human tooth and an endoprosthesis in their action, which is the basis for developing a procedure of endoprosthesis and designing an endoprosthesis with dumping elements. The procedure has been developed during a long-term surgical experiment by examining the results by the following techniques: X-ray, bed testing, light and scanning electron microscope. Experimental results are convincing. For coating the prostheses, polytetrafluoroethylene velour is used in the experiment, but cauflene, the material of the same kind polytetrafluoroethylene, is employed in the clinical setting. The experiments yielded two inventions patented in the Russian Federation. This direction in their development seems to be fruitful in preventing the aseptic endoprosthetic instability that is the most common and severe complication after endoprosthesis and requires most frequently resurgery.

[A multipurpose splint for the lower extremity]. / Shina dlia nizhnei konechnosti mnogotselevogo naznacheniia.

A leg splint is proposed for many therapeutical and transportation purposes. It has two type-sizes and convenient parameters. The splint is easy to use. Its design prevents leg circulatory disorders. It is made of available materials, requires no special storage conditions. The splint may be washed in routine domestic solutions containing soap or powdered detergents. Physicians and medical staff have given high praise to the splint.

[Experimental findings and a new screw endoprosthesis of the hip joint]. / Nekotorye éksperimental'nye dannye i novyi vintovoi éndoprotez tazobedrennogo sustava.

Based on his own experimental findings, the author provides strong evidence for negative consequences of the deranged vascular network of haversian systems while screwing the screw pedicles of hip joint endoprostheses into the endostalic margin of the cortical layer of the diaphysis. It is shown that it is not advisable to use a endoprosthetic assembly unit in the intertrochanteric area for biomechanical reasons. The latest endoprosthesis of the author's own design, which has a monolithic transition of the neck into the pedicle, is described, with emphasis on driving the endoprosthetic screw pedicle into the diaphysis rather than on its screwing. The prosthesis has a pedicle with a specific trapezoidal thread and a knock-down mobility unit.

[A concept of need and construction of a hip joint prosthesis with isolation of the friction point from the tissue]. / Kontseptsiia neobkhodimosti i konstruktsiia éndoproteza tazobedrennogo sustava s izoliatsiei uzla treniia ot tkanei.

The paper presents data available in the literature and the author's own data on the causes of bone tissue resolution around endoprostheses and on the occurrence of their aseptic instability. The author's own clinical data on 546 operations and follow-ups up to 16 years are strong evidence and his experimental findings are unique in the number of animals operated on and follow-up periods. The material was examined roentgenologically, morphologically, spectroscopically and the mineral content of bone tissue microstructures were determined. With the methods applied, the author clearly shows the role of tissue metallosis in the occurrence of aseptic instability of prosthesis. The author presents two up-to-day constructions of the total-type endoprostheses with the friction point isolated from tissue. The prostheses are accessible for manufacture at the modern enterprises and require no materials in short supply.

[The "Kompomed" elbow joint endoprosthesis from the Central Research Institute of Traumatology and Orthopedics]. / Endoprotez loktevogo sustava TsITO--"Kompomed".

Elbow joint implants having a metallic and polymeric mobility center and flattened structurilized stems have been developed, patented and allowed for commercial production. The construction of the implant allows for its firm joint with appropriate bones. The metallic and polymeric mobility center makes friction efforts relatively small. These qualities significantly lower the shaking properties of the stem and the implant operates long without displaying any signs of instability.

[A knee joint endoprosthesis]. / Endoprotez kolennogo sustava.

A knee joint implant is used to recover joint functions in patients with various sequelae of nonpurulent inflammatory diseases, degenerative and dystrophic processes, injuries, and tumorous and borderline processes in the knee joint. The study was undertaken to simplify the construction of the implant by preserving functional potentialities. The implant proposed by the authors is easy-to-use and shows reliability of the joining of the implant constituents due to the insertion of new parts. The implant exhibits its construction reliability and simplicity of making the implant in orthopedic, traumatological, and oncological institutions and patients' reduced rehabilitation stay.

[A shock-absorber-damper endoprosthesis for the hip joint]. / Amortizatsionno-dempfiruiushchii éndoprotez tazobredrennogo sustava.

The paper deals with the construction of an implant for complete thigh joint removal. The implant works on a new principle, i.e. division of the major parts of the prosthesis into load-carrying and bearing parts which are isolated all the way with damping silicone gaskets. The implant has a fundamentally new construction. It is accessible for commercial production by advanced technologies and readily applicable in clinical practice. The estimated results of its application are positive as when used, the implant brings a considerably less pressure to bear on the bone than do the well-known Russian and foreign implant models.