[Trochanteric femoral fractures]. / Trochanterické zlomeniny femuru.

At the present time proximal femoral fractures account for 30% of all fractures referred to hospitals for treatment. Our population is ageing, the proportion of patients with post-menopausal or senile osteoporosis is increasing and therefore the number of proximal femoral fractures requiring urgent treatment is growing too. In the age category of 50 years and older, the incidence of these fractures has increased exponentially. Our department serves as a trauma centre for half of Prague and part of the Central Bohemia Region with a population of 1 150 000. Prague in particular has a high number of elderly citizens. Our experience is based on extensive clinical data obtained from the Register of Proximal Femoral Fractures established in 1997. During 14 years, 4280 patients, 3112 women and 1168 men, were admitted to our department for treatment of proximal femoral fractures. All patients were followed up until healing or development of complications. In the group under study, 82% were patients older than 70 years; 72% of those requiring surgery were in their seventies and eighties. Men were significantly younger than women (p<0.001) and represented 30% of the group. The fractures were 2.3-times more frequent in women than in men. In the category under 60 years, men significantly outnumbered women (p<0.001). The patients with pertrochanteric fractures were, on the average, eight years older than the patients with intertrochanteric fractures, which is a significant difference (p<0.001). The mortality rate within a year of injury was about 30%. Trochanteric fractures accounted for 54.7% and femoral neck fractures for 45.3% of all fractures. The inter-annual increase was 5.9%, with more trochanteric than femoral neck fractures. There was a non-significant decrease in intertrochanteric (AO 31-A3) fractures. On the other hand, the number of pertrochanteric (AO 31-A1+2) fractures increased significantly (p<0.001). A total of 1 394 fractures were treated with a proximal femoral nail; a short nail was used in 1260 and a long nail in 134 of them. A dynamic hip screw (DHS) was employed to treat 947 fractures. Distinguishing between pertrochanteric (21-A1, 31-A2) and intertrochanteric (31-A3) fractures is considered an important approach because of their different behaviour at reduction. Pertrochanteric fractures occurred more frequently (81.5%); the patients' age was higher (80 years on the average) and women outnumbered men at a ratio of 3:1. Intertrochanteric fractures were found in significantly younger patients (average, 72 years), with a women-to-men ratio of 1.3:1. Stable pertrochanteric fractures (31-A1) were preferably indicated for DHS surgery. Unstable pertrochanteric (31-A2) and intertrochanteric (31- A3) fractures were treated with a nail. The patients underwent surgery on the day of injury or the next day. In the case of contraindications to an urgent intervention, surgery was performed after the patient's medical condition had stabilised. The number of complications was largely related to technical errors, such as insufficient reduction or an incorrectly inserted implant. Intertrochanteric fractures were associated with a higher occurrence of complications. No implant can compensate for errors due to surgery. Serious complications can be reduced by the correct assessment of fracture type, the use of an appropriate operative technique and early treatment of potential complications. The necessity of restoring continuity in the medial cortex of the femoral neck (Adams' arch) is the requirement that should be observed. Pseudoarthrosis or varus malalignment in a healed hip should be managed by valgus osteotomy. When the femoral head or the acetabulum is damaged, total hip arthroplasty is indicated. A prerequisite for successful surgical outcome is urgently and correctly performed osteosynthesis allowing for early rehabilitation and mobilisation of the patient.

Serum-cobalt levels with metal-on-metal bearings in the cement-free total hip arthroplasty results covering two years; prospective study.

PURPOSE OF THE STUDY: Total hip arthroplasty increases the use of alternate bearings to prevent polyethylene wear as the number of younger and more active patients has drastically risen. We carried out a prospective randomized study, to assess and compare clinical results and radiological changes, serum-cobalt- and serum-aluminium-levels when metal-on-metal and ceramic-on-ceramic bearings are applicated. MATERIAL AND METHODS: After giving informed consent 80 consecutive patients were included in this prospective randomized study. They were randomly assigned to receive either a metal-on-metal or a ceramic-on-ceramic bearing in their total hip replacement. Eligible were patients with a primary coxarthrosis or an avascular necrosis of the head of femur. Of the 80 patients 54 were females and 26 males. 42 patients were randomized to a metal-on-metal bearing and 38 patients were randomized to a ceramic-on-ceramic bearing. The average patient-age was 65,8 years and the mean body mass index was 27,7 at the time of operation. Surgery was performed through a transgluteal approach in supine position under general or spinal anaesthesia. A forged conical threaded acetabular component made of titanium-aluminium-niobium alloy was used in all patients. The metal inlays and the 28 mm metal heads were made of Co-28Cr-6Mo alloy with a carbon content of 0,2%. The ceramic inlays and the 28 mm ceramic heads are Al2O3 implants. We used as femoral component a conical rectangular stem of a titanium-aluminium-niobium alloy. Cup and stem werde implanted cementfree. Clinical data werde obtained at a follow up at a minimum of two years after implantation. Patients were assessed with the Harris Hip Score and the University of California at Los Angeles activity scale. 72 of the 80 patients could be explored clinically and radiologically. RESULTS: The 2 year follow up check showed clinically and radiologically no difference between the two groups. The median Harris HipScore was above 90 points and the UCLA score was about 7 points. The medium serum-cobalt level was in the metal-on-metal group about 1.2µg/L and in the ceramic-on-ceramic group below the detection limit. The medium serum aluminium level showed values of 1.2 respectively 1.3 µg/L. The luminescencies in the metal-on-metal group were increased, but all components of the prosthesis could be regarded as stable. DISCUSSION: It was the goal of our prospective study to compare clinical and radiological results of hip arthroplasty in metal-on-metal and ceramic-on-ceramic bearings and assess the serum-cobalt and the serum-aluminium levels. The socalled "biocorrosion" is still a high risk element for loosening of implants because of aseptic osteolysis. A higher release of polyethylene and metal particles is triggered, which leads to a slow but continuous process of inflammation. Apart from the debris also metal ions in a higher concentration are released, so that we could detect after some years in patients with artificial implants a higher level of metal in blood and urine. So far we did not recognize any carcinogenity or the appearance of renal disorders, or other mutagene effects in our patients. We could also not observe any fractures in ceramic implants. We are convinced that short time and intermediate reports are necessary, although final judgement can only be based on long term data. CONCLUSION: Our prospective randomized study showed after two years no difference clinically between the two groups of metal-on-metal and ceramic-on-ceramic bearings with total endoprostheses of the hip. Although medium serum-cobalt level in the metal-on-metal group with 1,2u/L is a significant higher value, whereas it lies in the ceramic-on-ceramic group below the detectable limit.

Results covering 20 years use of the cement-free Zweymüller Alloclassic total endoprosthesis of the hip joint.

PURPOSE OF THE STUDY: From an initial group of 206 hips in 190 patients we carried out a retrospective clinical and radiological control of 74 hips in 72 patients covering a period of 20 years. MATERIAL AND METHOD: Indications in 74 operated hips evidenced 48x(64.9%) primary and 26x(35.1%) secondary coxarthrosis. The average age at the time of operation was 53 years (37 years-68 years). All 72 patients with 74 hips received cement-free self- cutting Alloclassic screw cups of pure Titanium together with a cement-free square Alloclassic stem consisting of Titan- Aluminium-Niob alloy according to Zweymüller. Regarding the technique of operation we used the approach after Watson-Jones in the supine position. As prophylaxis against thrombosis 40% of the patients received derivates of heparine and 60% had anticoagulant therapy with cumarine. Prophylaxis against heterotopic ossifications were not carried out at this juncture in our department. RESULTS: After an average post-operational examination lapse of 20 years we were able to examine 72 patients (37.9%) with 74 hips (35.9%) clinically and radiologically. Further classification of the 72 patients records 47 females and 25 males. The average age at the time of operation was 53 years and at the time of post-operational check-up to 74 years. For the clinical post-operational check-up (n=74) we used the Harris Hip Score. Further evaluation shows 12x(16.2%) excellent results, 26x(35.1%) good and 29x(39.2%) fair results. In 7 patients (9.5%) we had to observe poor results because of multimorbidity, although also in these cases stability of TEP had been achieved. The radiological post-operational check-up of the 74 stable hips (35.9%) shows an average excentric position of the head of 1.4 mm (0 mm up until 4 mm) compared with 1 mm after 10 years. Over an average of about 20 years we carried out an exchange of the inlay and the head because of excentric position of the head, which correlates to a rate of reoperation of 6.8%. DISCUSSION: In 2000 and 2001 we published our 10 year results with cement-free Alloclassic screw cup and cement-free stem in 133 hips in 123 patients and compared our findings with those of other authors. After 10 years we saw only 3 % complications with cups and an overall re-operation rate of 6.7%. The 20-year-results show in all cases stable components of both cups and stems. 5 patients (6.8%) had to undergo re-operation with an exchange of inlay and head, whereby the components of the prosthesis themselves turned out to be stable. An average polyethylene abrasion of 1 mm after 10 years compares with a value of abrasion of 1,4 mm after 20 years. The 6.8% rate of re-operation after 20 years indicates the excellent results of the use of cement-free Alloclassic total endoprosthesis system of the hip according to Zweymüller. CONCLUSIONS: The biocompatible qualities of modern prosthesis material lead to a quicker and optimal bony incorporation of the pros- thesis components. The excellent 20-year-results show a broad indicative spectrum, component stability of the prosthesis in all patients and therefore encourage the further use of cement-free hip implants in the future.

[Periprosthetic fractures of the hip]. / Periprotetické zlomeniny v oblasti kycelního kloubu.

PURPOSE OF THE STUDY: It is the aim of our study to present the results of our way of treatment of the periprosthetic fractures, with the cemented as well as the cement-free stems. MATERIAL: From 1.1.1988 until 31.3.2005 we operated 42 periprosthetic fractures of the hip in 41 patients. 31 of our patients were females, 10 of them males. In 22 cases we operated the right side, 18 times the left side and once we had to operate both sides, but at different times. We used the Vancouver classification scale for the grading of the fractures. In our study we excluded type A fractures; we registered 41 type B fractures and one only type C fracture. The reason for periprosthetic fracture in all these 42 cases was definitely a trauma. In 6 cases we found pre-existing loosening of the stem. We have grouped our patients under two headings: 1. Primary cemented stems (n=13) 2. Primary cement-free stems (n=29) The average age at the time of primary operation was 63.6 years in the group of cemented stems and 67.2 years with the cement-free implants. METHODS: The principle of this operation lies in a stable technique of osteosynthesis. If one operates on a stable stem one uses a one and only technique of osteosynthesis. Patients who also suffer from a loosening of the stem, are treated by replacement of the stem combined with a particular form of osteosynthesis. We generally use a transgluteal access with an L-shaped detachment of the Musc. vastus lateralis. In the group of cemented stems (n=13) we carried out a replacement of the stem 6 times and in the group of cement-free stems (n=29) we had to replace the implant on 7 occasions. Analysing the osteosynthesis technique we find the use of titanium cerclages and titanium elements on 35 occasions, in both groups taken together. As implant for the stem we preferred the modulated revision stem according to Zweymüller. Clinical post-operational examination of our patients was carried out according to the Merle d'Aubigne score and two x-rays at different levels. RESULTS: After an average post-operational check-up time of 3 years and 2 months, we were able to examine 8 patients with cemented stems (61.5%), 4 of whom had replacement of the stem by a cement-free implant. In the cement-free group we evaluated 24 patients after an average time of 4 years and 11 months. In this group we had 5x a replacement of the stem, 3x of these we could operate cement-free. The post-operational radiological check showed an excellent building-up of bone structure without any dislocation of the implant in all 32 cases. DISCUSSION: The average age of our patients shows 77 years with those with cemented stems and 74.5 years in the ones with cementfree implants. Analysis of the cemented stems shows a loosening rate of more than 50%, which coincides with the findings of many other authors. After a couple of years using cups of polyethylene we were confronted with the problem of the so-called Polyethylene disease. These alterations may finally lead to a loss of bone quality, to mechanical loosening of the implant and an increase in danger of fracture. When we discuss the group of patients with cement-free stems and compare them to those with cemented ones, we find a number of quite different characteristics. B2 fractures appear in a quite higher number of patients with cemented and loosened stems. In this regard, our own study is congruent with the studies of other authors. In the cement-free group we had 75% B1 fractures with a stable stem. The explanation for these figures is, that the cement-free implants were well incorporated in the bone structure. CONCLUSIONS: The choice of operative procedure when treating periprosthetic hip fractures depends on the type of fracture and the stability of the prosthesis. Our own very positive experiences and the then emerging results lead to a certain strategy in procedure. That means, for us, the use of a cement-free modulated revision stem according to Zweymüller combined with a particular technique of osteosynthesis, using titanium cerclages and titanium elements.

Initial experience using the inverse prosthesis of the shoulder.

PURPOSE OF THE STUDY: The aim of our retrospective study is to show that in cases of very serious degenerative alteration of the shoulder as well as massive Cuff arthropathy, there is a valid reason for the indication of an inverse prosthesis of the total shoulder joint. We therefore describe operation technique as well as evaluation of our own results, including complications. MATERIAL: From October 2000 to October 2005, 24 patients had 25 Delta prostheses implanted. All these 25 implantations were carried out by the author personally, using the Delta prosthesis, in Hybrid technique. METHOD: In all 25 implantations we used a lateral access by splitting the Deltoideus. We implanted the Glenoid component cement free, and we cemented the prosthesis of the Humerus in all our cases. After an average post-operational examination time of 3 years and 9 month, we examined clinically and radiologically, 23 patients (92%) with 24 implants. Pain, mobility and activity in every-day life were considered in the clinical post-operative check up. RESULTS: Evaluation of pain showed that 14 patients (60,9 %) were free from pain and 9 patients (39,1 %) showed a great improvement in their medical state. In all cases we could clearly see that as far as mobility and activity in every-day life were concerned, a significant improvement hat occurred. The post-operative rate of complications showed the figure of 2 luxations (8 %). The luxation of the first patient could be repositioned in a non-operative way. The second patient was reoperated twice and we exchanged the shaft of the Humerus. In no instance did we discover any obstacle to the healing of wounds or any infections. DISCUSSION: When the indication is carefully handled the inverse prosthesis of the shoulder is an excellent way of treatment of serious degenerative alteration of the shoulder joint and major Cuff arthropathy. The operation, which is technically demanding, should only be carried out by an operator experienced in shoulder operations. The rate of luxations can certainly be lowered with the accumulation of experience and strict adherence to the precise way in technique called for by this operation. CONCLUSION: With elderly patients the inverse shoulder prosthesis is a good alternative way of treatment of serious degenerative alteration of the shoulder and massive Cuff arthropathy.

Serum aluminium and cobalt levels after ceramic-on-ceramic and metal-on-metal total hip replacement.

In a randomised study, 28 patients with a mean age of 62.2 years (32 to 81) with osteoarthritis or avascular necrosis of the hip received either a ceramic-on-ceramic or a metal-on-metal total hip replacement. Apart from the liners the acetabular and femoral components were made of Ti-Al-Nb alloy. The serum aluminium and cobalt levels were measured before, and at one year after surgery. The 15 patients in the ceramic-on-ceramic group had a median pre-operative aluminium level of 1.3 microg/l (0.25 to 8.4) and a cobalt level below the detection limit. At one year the aluminium level was 1.1 microg/l (0.25 to 2.3) and the cobalt level was 0.4 microg/l (0.15 to 0.7). The 13 patients in the metal-on-metal group had a median pre-operative aluminium level of 1.9 microg/l (0.25 to 4.4) and a cobalt level below the detection limit. At one year the median aluminium level was 0.9 microg/l (0.25 to 3.9) whereas the cobalt level was 1.4 microg/l (0.5 to 10.5). This increase in the cobalt level at one year was significant (p < 0.001). Our findings indicate that ceramic-on-ceramic bearings do not cause elevated levels of serum aluminium in the first post-operative year.

[Medial opening-wedge high tibial valgus osteotomy, using a stable TomoFix plate, in genu varum arthritis: surgical technique]. / Valgizacní vysoká osteotomie tibie u genu varum arthroticum rozevrením klínu z vnitrní strany stabilizovaná úhlove stabilní dlahou TomoFix: Operacní technika.

The authors present the technique of high tibial correction osteotomy by the medial opening procedure, with the use of an angle-stable TomoFix plate. The prerequisite for a long-term good outcome of corrective osteotomy in genu varum is to achieve limb alignment permitting transfer of weight-bearing from the affected medial compartment to the healthy lateral compartment of the knee. The development of implants that maintain a stable angle has facilitated corrective osteotomy with an opening wedge on the medial side of the proximal tibia. These implants provide stable fixation even when a high correction of the mechanical axis is needed. The authors present the case of a patient with varus malalignment following a fracture of the tibia. In order to achieve correction of the limb's mechanical axis, it was necessary to open the proximal tibia osteotomy with a wedge that was 2.5 cm on the outer side.

[Contributions to the flight behaviour of the pine shoot moth : II. The influence of wind and light on the flying direction in a wind tunnel by male moths]. / Beiträge zum Flugverhalten des Kiefernknospentriebwicklers : II. Der Einfluß von Wind und Beleuchtung auf die Flugrichtung männlicher Falter im Windkanal.

1. Males ofRhyacionia buoliana turn to the light source in immovable air. They favoured the more intense light source (100 W=950 Lx; measured at the starting point) above lower intensities. 2. The males flew-rarely walked-in the wind tunnel independent from the intensity of the air stream (max. 1.5 m/sec) upwind in direction to the light source (15 W=58 Lx). 3. Was the air stream directed to the light source (15 W), then the moths started upwind and drifted passive to the light source. The behaviour was independent from the intensity of the airflow. 4. Light sources of the same illumination (15 W) offered on both sides of the tunnel stimulated the moths to stard upwind but immediately after starting they drifted downwind. 5. Light sources of different intensities (40 W resp. 100 W=305 Lx resp. 950 Lx) given at the same time, changed with increasing windspeed the approached flight of the moths from the luminous side to that with the poorer light source. 6. These results are discussed in respect to the departure of male moths in areas free of pines.

Untersuchungen über das Flugverhalten männlicher Falter von Rhyacionia buoliana (Lep., Tortricidae).

1. Caged females of Rhyacionia buoliana attract males only during a limited period in the early evening. Outside this time no flying males could be observed. 2. Even when abdominal extracts of females are offered during a period of 24 hours, flight activity of males occurs only between late afternoon and beginning darkness. 3. Males could be attracted by abdominal extracts before females released scent and before the general male flight started. 4. On clear evenings extracts placed on aisles attracted males later than those in plantations. This difference in timing is explained by differences in light intensity between the two areas.

[Plastic operation of the cruciate ligament (part I).]. / Ersatzplastiken des vorderen Kreuzbandes (Teil I).

In the submitted paper the authors describe in the introduction various possible ways of using autologous, homologous and heterologous transplants. A graft taken from the patellar ligament with two bone blocks from the patella and head of the tibia is, because of the great structural strength, the transplant of choice. As far as the surgical technique is concerned, the authors abondoned the open method because of its known disadvantages such as major arthrotomy and associated damage of proprioceptors of the knee joint. The authors are using the semi-open arthroscopic method, whereby artroscopic methods are definitely preferred. Positive aspects of arthroscopic methods are definitely preferred. Positive aspects of arthoscopy such as inspection of the joint, treatment of associated injuries, sparing of Hoffa's body and atraumatic surgical technique all are an advantage for the patient. An obvious advance in the surgical technique is the fixation of bone blocks by interference screws. This leads to early functional treatment using Lennox-Hill's orthesis and full burdening after 3-4 weeks. As most recent animal experiments confirmed that incorporation of the transplant from the lig. patellae is not completed before 12-14 month, it is no advantage to allow the patients to relieve the weight on the extremity. Shortening of the period of treatment reduces also trophic disorders on the operated extremity. Key words: instability of the knee joint, anterior cruciate ligament, plastic operation.

[Initial experience with arthroscopy of the joint of the hand.]. / Erste Erfahrungen mit der Arthroskopie des Handgelenkes.

In the submitted paper the authors give an account on the development of arthroscopy of the joint of the hand and comments on arthroscopic anatomy and technique of the procedures. In the authors' hospital the procedure is carried out under general anaesthesia, the patient lies on his back with the arm suspended in extension by the fingers, using a 3-5 kg weight. The authors use a needle arthroscope of Storz Co. with a diameter of 2.7 mm which is inserted into the joint from a dorsomedial approach. During the period between Jan. 1, 1990 and Dec. 31, 1993 14 arthroscopies of the joint of the hand were made in 10 women and 4 men, three times on the left and 11 times on the right hand. The mean age of the patients was 25 years and the mean follow-up period 2 years (8 months - 3 years). Revealed surgical findings: - chondromalacia 7 times; - damage of the disk twice; - rupture of the disk and chondromalacia 3 times; - synovitis once; - no pathological intraarticular finding once (cysta lunata without perforation). By surgery with irrigation and arthroscopic procedures such as resection of a ruptured disk and elimination of a defect of the authors were able to achieve improvement in mor than 70% of the patients.

[Ten years experience with the cementless alloclassic cup according to zweymüller.]. / Zehnjärige Erfahrungen mit der zementfreien Alloclassic-Pfanne nach Zweymüller.

Because our department of orthopaedic surgery deals with the cementless hip replacement for more than 15 years, we have performed a retrospective study and a critical analysis of our patients. In the time between 01. 05. 1987 and 31. 12. 1989 we implanted 206 primary cement-free total endoprostheses of the hip in 190 patients. After an average time taken for postoperative check-ups of ten years and seven months we evaluated 133 hips (64,6 %) in 123 patients (64,7 %) clinically and radiologically. The clinical postoperative check-up according to the score of Merle d'Aubigne demonstrated very good and good results in 90 % of our cases. After 10,6 years the radiological measurement showed an average polyethylene wear of 1 mm. The critical analysis of our patients amounted to 3 % of cup complications.The therapy with the reoperations of 9 patients (6,7 %) will also be discussed. In the discussion we are concerned with the results and problems of other authors, who are engaged with the cementless hip replacement. Summarizing we can declare, that the cementless Alloclassic cup to Zweymüller has a lot of advantages: ideal primary stability simple surgical technic optimal bony incorporation low polyethylene wear For the future we recommend a change of the headsize from 32 mm to 28 mm. In young and active patients we propose a metal-metal or a ceramic-ceramic pairing. Key words: cementless cup, primary stability, low polyethylene wear, 28 mm headsize.

[Short-term results in hallux valgus surgery using a V-shaped osteotomy of the first metatarsal head]. / Kurzzeitergebnisse bei der Operation des Hallux valgus Mittels V-förmiger Verschiebeosteotomie des I. Mittelfussköpfchens.

At the Orthopaedic Department of the hospital in Zwettl between January 1988 and August 1990 a total of 35 operations according to Austin were made. The group comprised 33 patients, 30 women and 3 men. The follow-up period was 7 to 38 months, on average 23.4 months. In 24 instances the operation was performed on the right, in 11 instances on the left foot. Indications, surgical technique and results are discussed in detail.

[Diagnostic and therapeutic arthroscopy of the elbow joint]. / Diagnostische und therapeutische Arthroskopie des Ellbogengelenkes.

The anatomical structure of the elbow joint makes arthroscopy markedly more difficult, as compared with the knee joint or shoulder. This is confirmed also by the small number of hithero published work. The limitation of inspection of the elbow joint ensues from the firm articular capsule and restricted intraarticular space. This leads to difficult manipulation of optical and other instruments in the limited visual field. The position of neurovascular structures in the vicinity of the surgical approach increases the demands of surgical technique.

[Plastic Operations of the Anterior Cruciate Ligament (Part II).]. / Ersatzplastiken des vorderen Kreuzbandes (Teil II).

Between January 1, 1988 and December 31, 1993 125 operations of the anterior cruciate ligament were performed in 27 women and 98 men. 58 operations were on the left side, 67 on the right side. In the case - history an injury during leisure time was recorded in 84.8% of the patients, during sports activities in 94%. Of 125 patients 122 were examined by arthroscopy, three were operated by the semiopen approach. The mean age at the time of surgery was 29 years. The selection of the time of surgery indicates that 98% of the patients were operated as early secondary operations and as secondary operations (after 4 weeks). Of 125 patients 122 (97.6%) were examined repeatedly after a mean interval of 43 months. For evaluation the authors used a modification of the "Lysholmscore". According to the latter in 95% very good results were achieved. For evaluation of the stability the authors used a strict test, i.e. the Lachman test and KT-1000 measurements. As to severe complications, they recorded one deep infection, as to late complications there were two cases of arthrofibrosis with "cyclops syndrome". Key words: anterior cruciate ligament, ligamentoplasty.

[Experience with dynamic hip screw in retrochanteric and subtrochanteric fractures of upper femur.]. / Erfahrungen mit der dynamischen Hüftschraube bei per- und subtrochantären Oberschenkelfrakturen.

From 1st January 1988 to 31st December 1994, 105 patients were given 106 dynamic hip-screws in the Orthopaedic Department of the Public General Hospital, Zwettl. The average age at the time of operation was 77.6 years and the time lapse between the accident occuring and the operation performed was on average 31 hours. In 94.3% of the cases we could perform a closed reduction and in 88.7% we used a 135 degree-DHS. The four-hole plate dominated in 73.6% of the plates used. Internal complications totalled 23.6% out of which 9.5% of the patients died during their hospitalization. Here one must take note that the patients who died were of advanced age and multimorbid. We carried out clinical and radiological postoperative examinations on 54 patients (51.4%) with 55 operations (51.9%). The postoperative examinations took place on an average of 33 months (2 years and 9 months). The clinical postoperative examinations were carried out according to the Merle D'Aubigne system - 29 excellent, 58 good and 13 poor. The radiological postoperative examinations disclosed an ossian consolidation of 100% for 54 patients with 55 operations. Taking into account the classification of fractures according to the AO we find that the DHS is mainly used to treat fractures A 1/1-, A 1/2- and A 2/2-. With the exception of subtrochanteric fractures in which we have lately been using the Gamma-Nail, we have the DHS as a technically relatively simple and inexpensive implant in the treatment of pertrochanteric fractures of the neck of the femur.

[Reconstruction Osteotomy by Morscher's Method in Coxa Vara.]. / Rekonstruktionsosteotomie nach Morscher bei Coxa vara.

Between January 1, 1989 and December 31, 1994 the authors performed in eight patients prolongation osteotomy of the neck of the femur with transposition of the greater trochanter. The patients comprised six women and two men, in four instances the left and four instances the right side was operated. The indications comprised in four patients congenital dysplasia of the hip joint with a shorter externity, is three patients Perthes disease, incl. in one patient postluxation m. Perthes, in one patient a state following fracture of the cervix. By Morscher's osteotomy prolongation of the extremity can be achieved and improved biomechanics of the hip joint. The method is recommended especialy younger patients with mild arthritic changes.

[Arthroscopic Surgical Technique and its Short-term Results in the Treatment of Relapsing Anterior Dislocation of the Shoulder.]. / Arthroskopische Operationstechnik und Kurzzeitergebnisse bei der Behandlung der rezidivierenden vorderen Schulterluxation.

In the submitted paper the autors describe the arthroscopic technique of treatment of relapsing anterior and combined low-anterior dislocation of the shoulder. The principle is a three-layer reconstruction tehchnique of the anterior portion of the joint. It involves reinsertion of the ruptured complex labrum-ligaments, three glenohumoral ligaments and the tendon of the m. subscapularis on the anterior surface of the cervix of the scapula blood stained in advance. Across the listed structures 4-6 U-shaped stitches which are pulled through a canal bored in the cervix of the scapula on the dorsal side and these stitches are fastened by knots over the fascia of the m. infraspinatus. Another modification of this technique is knotting of dorsally drawn fibres across an absorbable foil on the dorsal surface of the neck of the scapula. For after-treatment for four weeks a ready made shoulder dressing of LINK Co. is applied. In the submitted paper the authors give an account of the early results obtained in 11 operated patients who were treated by this technique of ventral arthroscopic capsulorraphy. The follow-up period was 16-33 months (average 24 months). Key words: dislocation of the shoulder, operating technique, arthroscopy.

[Endoscopic subacromial decompression.]. / Die endoskopische subacromiale Dekompression.

In 23 patients with problems in the region of the shoulder caused by subacromial pathology endoscopic subacromial decompression was performed. The group comprised 11 men and 12 women aged 30 to 72 years. The patients were evaluated according to the UCLA score. The mean follow-up period was 23.3 months. After critical evaluation 14 excellent, 8 satisfactory and one average result were achieved. Endoscopic subacromial decompression, as describe, is an effective and safe technique in treatment of the impingement syndrome. Rapid restoration of the function is made possible by the low postoperative morbidity and fact that the deltoid muscle is not damaged. Key words: impingement syndrome of the shoulder, arthroscopy of the shoulder.

[Initial Experience with a New Generation of Zweymüller's Endoprosthesis.]. / Erste Erfahrungen mit der neuen Generation der Zweymüller-Totalendoprothese.

In the first part of our paper innovations as regards the non-cemented endoprosthesis of the hip joint by Zweymüller's method are described. As a special advantage the double cone of the socket is mentioned which as to its anatomical shape is close to the acetabulum and makes only slight resection of the bone on the floor of the acetabulum possible. At the Orthopaedic Department of the hospital in Zwettl between 1984 and 1987 more than 100 polyethylene Endler screw sockets were implanted. From the end of 1987 to the beginning of 1993 the authors used non-cemented endoprostheses as designed by Zweymuller. Based on the mentioned advantage of the new biconical socket, as suggested by Zweymuller, the authors implant this generation since the beginning of 1993. During the period from Jan.1, 1993 to Dec. 31, 1993 68 endoprostheses of the hip joint of the new type were used during primary operations. The follow-up of patients respected clinical and radiological criteria (pattern of Merle d'Aubigne). Of 68 patients 67 (98.5%) were followed up. In the present retrospective study in particular heterotopic ossifications were investigated, whereby the years 1992 and 1993 were compared. Key words: non-cemented total endoprosthesis of the hip joint, non-cemented biconical socket.