PubMed Health⌕ Search

Biomedical subjects

F Böttner

Publications and source records attributed to F Böttner.

7 recordsLinked to original sources
PubMed2005

Long-term results of the metal-cancellous cementless Lübeck total hip arthroplasty: a critical review at 12.8 years.

INTRODUCTION: The influence of a spongy metal surface total hip arthroplasty (THA) (S&G, ESKA, Lübeck, Germany) on the clinical, psychometric, and radiograhic long-term results were examined. MATERIAL AND METHODS: An amount of 137 THA with the cementless spongy metal Lübeck hip prosthesis were evaluated long-term, radiographically and clinically, with a mean follow-up time of 12.8 years (range 10.1-14.9 years). The MOS SF-36 was used to assess the health-related quality of life (HRQL). RESULTS: Cumulative survival rates were 90% (+/-8%) for the cups and 86% (+/-5%) for the stems at 14.9 years. Four stems fractured at the middle part (3%) without major trauma. In the remaining patients the clinical results expressed as Harris Hip Score (HHS) averaged 88 (range 34-100). Patients above 60 years undergoing THA had no significant difference in HRQL (MOS SF-36) in comparison to the age-matched healthy population (P>0.05). Patients younger than 60 years had scores lower than normal in the physical function domains (P<0.01), but were comparable in the mental health domains (P>0.05). Radiolucent lines and bone atrophy related to stress shielding by distal fixation were found in the periprosthetic Gruen Zone I (19.8, 16.8%) and VII (10.3, 27.1%) of the proximal femur. DISCUSSION: Whereas the rate of aseptic cup failures of the cementless spongy metal Lübeck hip prosthesis is among the best, the failure rate of the stems is attributable to osteolysis of the proximal femur. The fractures of the stem may be attributed to the combination of the lack of proximal support, the fully porous stem made of a cast cobalt-chrome-molybdenum alloy, and the narrow dimension of the stem core. The long-term results of the spongy metal cup are good, whereas the high loosening and fracture rate of fully coated stem are a source of concern especially with regard to the difficult revision scenario with frequent massive bone loss.

Adult↗
PubMed2001

[Prevention of thrombosis in hip prosthesis implantation].

Deep venous thrombosis is one of the most common perioperative complications after total hip arthroplasty. Systemic anticoagulation has been the gold standard for prophylaxis of postoperative deep venous thrombosis. There is no doubt that early mobilization and the use of pneumatic compression devices decrease the overall deep venous thrombosis rate. Single postoperative prophylaxis may decrease the overall deep venous thrombosis rate to 15-20% and the proximal deep venous thrombosis rate to approximately 7%. However,the activation of thrombogenesis is mainly an intraoperative event. The position of the extremity during the implantation of the femoral component leads to obstruction of the venous outflow. At the same time, the coagulation cascade is activated and markers of thrombogenesis in the blood are increased. By combining intraoperative (hypotensive epidural anesthesia and intraoperative heparin) and postoperative (pneumatic compression devices and aspirin) prophylaxis of deep venous thrombosis, the total deep venous thrombosis rate is reduced to less than 10% and the proximal deep venous thrombosis rate is reduced to 2%. Patients with increased risk for deep venous thrombosis should receive Coumadin or low-molecular weight heparin. In addition, hypotensive epidural anesthesia reduces the intraoperative blood loss and the need for postoperative blood transfusion.

Anesthesia, Epidural↗
PubMed2000

Osteoarticular allograft in surgery for high-grade malignant tumours of bone.

We assessed the results of 17 limb-salvage procedures using osteoarticular allografts after wide resection of high-grade malignant bone tumours. All patients received chemotherapy. At the five-year follow-up, three patients had died from metastases. The allografts survived for five years in only seven patients all of whom had good function, ranging from 73% to 90% of normal. The allografts were removed because of fracture in seven patients and infection in one, and in all of these a second limb-salvage procedure was undertaken. With such a low rate of survival of osteoarticular allografts, we believe that their use in the management of high-grade malignant bone tumours should, at best, be considered a temporary solution.

Adolescent↗
PubMed2000

Osteoid osteoma.

Explore the source record for details and available documents.

Bone Neoplasms↗
PubMedDate not supplied

[Minimally invasive treatment of osteoid osteoma with CT-guided radiofrequency ablation in long-term follow-up].

AIM: We treated 74 patients with symptomatic osteoid osteoma by CT-guided radiofrequency ablation (CT-RF) and investigated the rate of success and complications. PATIENTS AND METHODS: 74 patients were treated by CT-RF between March 1997 and August 2001. The nidus was first located by thin-cut CT sections and then penetrated by a 2 mm coaxial drill or an 11-gauge Jamshidi needle followed by insertion of the RF probe and heat application for a period of 4-6 minutes at 90 degrees C. We investigated the recurrence of pain, complications, hospital stay, duration of postoperative pain and function. RESULTS: Nine recurrences occurred after the initial procedure, and one after a second CT-RF (rate of primary success 87.8 %, rate of secondary success 88.8 %; 98.6 % success rate in all). There was one minor complication in one case. CONCLUSIONS: CT-guided RF ablation cured 73 of 74 patients (98.6 %). It is a safe, simple, cost effective and minimally invasive treatment, which has stood the test of a long-term follow-up and we suggest it to be the treatment of choice in most cases.

Adolescent↗
PubMedDate not supplied

[Long-term influence of the spongiosa metal surface prosthesis on the periprosthetic bone. A radiological and osteodensitometric analysis of implantation of the S& G (ESKA) hip prosthesis].

INTRODUCTION: The anatomically shaped, cementless total hip replacement (THR) (S and G, ESKA Lübeck) has a fully porous coating for secondary osseointegration. The aim of the present study was to analyse the long-term effect of the prosthesis on periprosthetic bone remodelling. METHODS: 137 THR in 117 patients were analysed clinically and radiographically 12.8 years (10-14.9 years) postoperatively. The average age at the last follow-up was 71.8 years (range: 34-87 years). Osteodensitometric DEXA measurements of the periprosthetic bone in comparison to the contralateral non-operated femora were performed. RESULTS: Cumulative survival rates of all implanted THR (n = 231) at 14.9 years were 86.2 % (+/-5.3 %) for the fully porous coated stem and 90.1 % (+/- 8 %) for the cup. Five stem fractures (3.6 %) at the middle part were recorded. The Harris hip score of the non-revised THR at the last follow-up averaged 88.3 (34-100) points. Bony atrophy in the proximal periprosthetic femora in Gruen zones I (16.8 %) and VII (34.6 %) confirmed a proximal stress-shielding. Osteodensitometric analyses demonstrated in comparison to the contralateral femora (BMD 1.3 g/cm (2)) a significantly reduced bone density at the calcar femoris (BMD 0.9 g/cm (2)) (p < 0.001). CONCLUSION: The original goal of a physiological load transfer has not been realised with this fully porous, cementless THR. The anatomic S & G stem will mainly be osseointegrated by distal load transfer.

Absorptiometry, Photon↗