Introduction: In 1962 Harrington published his method of spinal instrumentation in scoliosis treatment. 256 patients have been treated with this instrumentation at the Hospital for Orthopaedic Surgery Stolzalpe in the years of 1968 –1992.

Material & Methods: A retrospective study was performed on 74 patients (48 female, 26 male) with a mean follow up time of 22,5 years. A clinical examination, x-ray, spirometry was performed as well as the Oswestry Score and the Visual Analogue Scale test (VAS) to determine the patients confidence and possibilities in activities of daily living (ADL), profession and sports. Also the ROM of the spine, degeneration of the adjacent levels and loss of correction were a subject of interest.

Results: All patients were satisfied or very satisfied and there were no severe restrictions in their ADL. 92 % are busy in the normal working process, 61 % do sports without complaints. The mean Oswestry Score was 9 pts (1–12,5) and the average VAS was 1,1 of 10 (0–4), with major problems in sitting and standing. Spirometry was restricted in 33%, movement was limited in side bending in nearly all patients.

Conclusion: Although with Harrington’s method no segmental correction was possible and long time casting and orthetic aids were necessary, we found very confident patients without major restrictions in daily life. Similar long term results with modern methods and instruments have to be proven.

To evaluate short term results of 126 computer assisted unicompartmental knee arthroplasty (UKA) with ligament balancing.

Between September 2003 and November 2007 we performed 126 computer asssited surgery UKA Preservation. We using kinematic navigation Ci system. This is cemented system with mobile or fixed bearing. Our groups included 72 women and 54 men. Average age at surgery was 71,2 years. The indication for UKA include primary or postraumatic osteoarthritis limited to one compartment, a functional anterior cruciate ligament, no inflamatory disease. In all cases was only medial femorotibial osteoarthritis. Arthroscopic partial medial menisectomy was performed in 25 cases. Approach: medial parapatellar arthrotomy. Clinical evaluation was performed by Hospital for Special Surgery knee scoring system (HSS). Imaging: AP,lateral and stress X-rays.

The average HSS score was 57 point (range, 40–79 points) preoperatively and 94 points (range 62–100 points) postoperatively. 90% patients were classified as excellent or good using the HSS. The average range of motion before surgery: S 0-0-120 gr., 6 days after surgery S 0-0-110 gr. and 3 months after surgery S 0-0-125 gr.

No significant difference in maximum flexion was seen between the preoperative and postoperative values. There were no infection, fracture of tibia plateau, poor pain, or sign of patellar impingement.

UKA together with modern design, reproductible instrumentation and kinematic navigation can eliminate the previous cause of early failures, contralateral tibiofemorial degeneration and tibial loosening. The patient’s selection must be strict regarding (the ideal patient more than sixty years old, low Body Mass Index, low demand of physical activity). Kinematic navigation reduces the possibility of surgeon’s mistake, alignement of the femoral and tibial component, resection level, soft tissue balancing. It increases the accuracy of the comoponent position, especially in the side of the tibia. A continued long term follow-up is necessary to evaluate polyethylene wear after 10 years.

To evaluate first short term results of the 82 Articular Surface Replacements (ASR) of the hip joint with kinematic navigation.

Between March 2006 and March 2007 we performed 82 resurfacings of the hip. In all cases we used Articular Surface Replacement of the Hip joint (ASR-DePuy) with kinematic navigation (Ci system). Our group included 47 women and 35 men. Patients’ mean age at surgery was 68.2 years. The indication for resurfacing was just primary osteoarthritis. Clinical evaluations were conducted using the Harris Hip Scoring system. Imaging studies: AP, axial X-rays.

Patients were followed for an average 12 months postoperative (7–20 months). The average postoperative Harris Hip Total Score was 97%, and 98% of the patients were in the good to excellent range of 80–100 points. No patients were lost to follow-up. We noted a greater range of movement, faster postoperative rehabilitation and shorter time of hospitalization compared with traditional total hip arthroplasty. There were no cases of neurological complication, deep infection, wound dehiscence or dislocation. All X-rays refer correct position of femoral component in both projections. Our experiences with Articular Surface Replacement of the Hip Joint (ASR-DePuy) powered by Ci navigation system are good, but long term followup will be continued.

Articular Surface Replacement of the Hip Joint with modern design, reproductible instrumentation and kinematic navigation can eliminate the previous cause of early resurface failures and loosening. The patient selection must be strict regarding. The kinematic navigation define precise position of the components of ASR. A continued long term follow-up is necessary after minimum 10 years.

Aims: In this retrospective study the authors evaluate influence up anatomic changes after HTO to the functional results TKA. Methods: The authors compare two groups.

1st group: 50 patients with TKA without HTO, 28 male, 32 female, average age:71,2 years.

2nd group: 50 patients with TKA after HTO,26 male, 34 female, average age: 73,5 years.

The period of post-operative follow-up longer then five years, average 5,4 years.

The results were evaluated by The Knee Society Clinical Rating System: Knee Scoring System and Functional Score. Results: In our study we didn’t find significant differences between 1st group and 2nd group in this worths: pain, antero and mediolateral instability, flection and extention deficit, axial divergence. In KSS and FS was not statistical significant difference. Conclusions: The results TKA with and without HTO in follow-up longer then five years are not significant different.

In 1st group average KSS was 86,6 points, in 2nd group 81,4 points.

Average FS was in 1st group 82,7 points, in 2nd group 81,4 points.

In 1st group we didn’t find patella infera, in 2nd group was patella infera in 42%(21).

Insall-Salvati index 1st group was 1,06, in 2nd group 0,91.

The clinical results were comparable.