scholarly journals Can we trust combined anteversion and Lewinnek safe zone to avoid hip prosthesis dislocation?

2021 ◽  
pp. 101562
Author(s):  
Alejandro Hernández ◽  
Kushal Lakhani ◽  
Jorge H. Núñez ◽  
Iñaki Mimendia ◽  
Aleix Pons ◽  
...  
Keyword(s):  
Hip Prosthesis ◽  
Safe Zone ◽  
Combined Anteversion

scholarly journals "Safe Zone" of Range of Motion of the Hip Prosthesis.

1997 ◽  
Vol 46 (1) ◽  
pp. 179-184
Author(s):  
Norihiko Hiratsuka ◽  
Yasuo Noguchi ◽  
Satoshi Kojima
Keyword(s):  
Range Of Motion ◽  
Hip Prosthesis ◽  
Safe Zone

Combined Anteversion Technique in Total Hip Arthroplasty for Crowe IV Developmental Dysplasia of the Hip

2017 ◽  
Vol 27 (6) ◽  
pp. 589-594 ◽  
Author(s):  
Biao Zhu ◽  
Changzheng Su ◽  
Yeteng He ◽  
Xingyu Chai ◽  
Zhen Li ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Femoral Anteversion ◽  
Safe Zone ◽  
Developmental Dysplasia ◽  
Acetabular Anteversion ◽  
Combined Anteversion ◽  
The Mean ◽  
Postoperative Dislocation ◽  
Dysplasia Of The Hip

Background A high rate of postoperative dislocation in total hip arthroplasty (THA) for Crowe IV developmental dysplasia of the hip (DDH) has been reported, 1 of the main reasons being higher true acetabular anteversion. If the cup is fixed with normal anteversion, the anterior rim will be excessively exposed, which reduces the contact areas of the cup and bone, affects prosthesis stability, and leads to iliopsoas tendinitis and persistent hip pain after THA. The aim of this study was to demonstrate that when cup anteversion is larger, adjusting femoral anteversion to bring the combined anteversion (CA) into the “safe zone” might prevent dislocation. Methods After having fixed the cup in the acetabulum according to the patients’ native acetabular anteversion, we shortened and rotated the proximal femur to reduce femoral anteversion, adjusting the CA into the “safe zone”. The Harris Hip Score (HHS) was used to evaluate hip joint function. Computerised tomography scanning was used to measure the anteversion angles. Results All patients were followed up without any dislocation. Preoperative and 12 months after surgery, the mean HHS were 43.3 ± 2.6 (38-47) and 88.1 ± 3.3 (78-92) respectively. Pre- and post-operation, the mean CA angles were 88.6° ± 9.4° (80.3°-119.4°) and 49.2° ± 2.6° (43.4°-54.4°) respectively. The bone healing time of femoral osteotomy ranged from 4 to 14 months, with a mean time of 7.5 months. Conclusions This CA technique in THA for Crowe IV DDH can effectively prevent postoperative dislocation and provide good hip function.

Understanding Acetabular Cup Orientation: The Importance of Convention and Defining the Safe Zone

2011 ◽  
Vol 21 (6) ◽  
pp. 646-652 ◽  
Author(s):  
Vincent Y. Ng ◽  
Michael A. Mcshane
Keyword(s):  
Total Hip Arthroplasty ◽  
Preoperative Planning ◽  
Three Dimensional ◽  
Computer Navigation ◽  
Safe Zone ◽  
Acetabular Cup ◽  
Combined Anteversion ◽  
New Concepts ◽  
Accuracy And Precision ◽  
Intraoperative Positioning

Understanding acetabular cup orientation is important in all aspects of total hip arthroplasty including preoperative planning, intraoperative positioning, and postoperative analysis. New concepts in ideal cup orientation such as ‘combined anteversion’ have emerged. Using computer navigation and three-dimensional imaging, the potential for accuracy and precision of implantation have improved. Nevertheless, the varying manner in which the terms “anteversion” and “abduction” are often used in the literature is indicative of a nebulous understanding of the complex spatial anatomy of acetabular cup orientation.

Novel methods for demonstrating osseointegration of hydroxylapatite-coated titanium hip prostheses

1991 ◽  
Vol 49 ◽  
pp. 34-35 ◽  
Author(s):  
P. Frayssinet ◽  
J. Hanker ◽  
D. Hardy ◽  
B. Giammara
Keyword(s):  
Hip Prosthesis ◽  
Ethanol Concentration ◽  
Bone Matrix ◽  
Electron Microscopic Examination ◽  
Electron Microscopic ◽  
Hip Prostheses ◽  
Cellular Inclusions ◽  
Microscopic Studies ◽  
Diamond Saw ◽  
Plasma Sprayed

Prostheses implanted in hard tissues cannot be processed for electron microscopic examination or microanalysis in the same way as those in other tissues. For these reasons, we have developed methods allowing light and electron microscopic studies as well as microanalysis of the interface between bone and a metal biomaterial coated by plasma-sprayed hydroxylapatite(HA) ceramic.An HA-coated titanium hip prosthesis (Corail, Landos, France), which had been implanted for two years, was removed after death (unrelated to the orthopaedic problem). After fixation it was dehydrated in solutions of increasing ethanol concentration prior to embedment in polymethylmethacrylate(PMMA). Transverse femur sections were obtained with a diamond saw and the sections then carefully ground to a thickness of 200 microns. Plastic-embedded sections were stained for calcium with a silver methenamine modification of the von Kossa method for calcium staining and coated by carbon. They have been examined by back-scatter SEM on an ISI-SS60 operated at 25 KV. EDAX has been done on cellular inclusions and extracellular bone matrix.

Femoral-shaft fracture below hip prosthesis

JAMA ◽  
1965 ◽  
Vol 194 (13) ◽  
pp. 1378-1381
Author(s):  
O. E. Aufranc
Keyword(s):  
Femoral Shaft Fracture ◽  
Hip Prosthesis ◽  
Femoral Shaft ◽  
Shaft Fracture

Analysis of 18F-FDG uptake patterns in PET for diagnosis of septic and aseptic loosening after total hip arthroplasty

2003 ◽  
Vol 42 (06) ◽  
pp. 234-239 ◽  
Author(s):  
T. Mumme ◽  
P. Reinartz ◽  
D. Wirtz ◽  
F. U. Niethard ◽  
U. Büll ◽  
...  
Keyword(s):  
Aseptic Loosening ◽  
Femoral Component ◽  
Hip Prosthesis ◽  
Prosthetic Infection ◽  
Clinical Value ◽  
Septic Loosening ◽  
Hip Prostheses ◽  
Fdg Uptake ◽  
Positron Emission ◽  
Painful Hip

Summary Aim: Identification of typical patterns for fluorodeoxyglucose (FDG) uptake in positron emission tomography (PET) to detect aseptic loosening of hip prosthesis (ace-tabular and/or femoral component) and prosthetic infection. Methods: 18 patients with painful hip prosthesis underwent PET using a dedicated full ring scanner after application of 200-300 MBq FDG. The interface between bone and surrounding soft tissue or bone as displayed on coronal slices was divided into 12 segments in accordance with the classifications of Delee and Gruen. FDG uptake in each of the segments was scored (0-3) by two independent observers. Intraoperative findings were regarded as the gold standard. Results: After surgical revision 14 acetabular components and 9 femoral components were found to be loose and prosthetic infection was present in 7 prostheses. Loosening of the acetabular component was correlated to enhanced uptake in the middle of the acetabular interface, while loosening of the femoral component was correlated to enhanced uptake in the proximal and middle segment of the lateral femoral interface and the proximal segment of the medial femoral interface. A similar pattern was found in prosthetic infection with high uptake along the middle portion of the lateral fe-moral interface. In 6 of 7 infected prostheses loosening of the acetabular and of the femoral component was present. Taking the typical uptake patterns as criteria for loosening and grade 3 uptake as an additional criterion for septic loosening the accuracy of PET imaging in the detection of loosening of the acetabular or the femoral component and of prosthetic infection was 72, 78 and 89%, respectively. Conclusion: This pilot study presents FDG-PET as a promising diagnostic tool for patients with painful hip prostheses. Its clinical value should be evaluated in a larger patient population.

Plasma Prekallikrein Activity in Patients with Total Hip Arthroplasty

1987 ◽  
Vol 58 (04) ◽  
pp. 1040-1042
Author(s):  
J J M L Hoffmann ◽  
J H J P M Kortmann
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Hip Prosthesis ◽  
Contact System ◽  
Factor Xii ◽  
Total Hip ◽  
Activity Factor ◽  
Patient Groups ◽  
Kallikrein Activity

SummaryThe behaviour of the contact system was studied in 40 patients with total hip arthroplasty, by measuring plasma prekallikrein, spontaneous kallikrein activity and factor XII. In the literature it had been shown that patients with complications from this operation had decreased prekallikrein and increased kallikrein activity (M. Nakahara. Acta orthop scand 1982; 53: 591-6). In the present study, comprising patients with and without pain and proven loosening of the hip prosthesis, these findings could only partially be confirmed. Patients with a loosened prosthesis had significantly lower prekallikrein (mean 0.78 ± 0.28 U/ml; p <0.01) than patients without problems, but no detectable kallikrein activity in plasma. Patients with pain but no loosening had normal prekallikrein (1.04 ±0 0.26 U/ml) and also no demonstrable kallikrein activity. Factor XII was normal in all patient groups. It is concluded that decreased prekallikrein is limited to patients with a loosened hip prosthesis, with or without pain.

PILAR-PILAR PENDONGKRAK BERPIKIR KRITIS DAN LOGIS DALAM BUKU SENI MERAWAT JIWA

Forum ◽  
2020 ◽  
Vol 49 (2) ◽  
pp. 105-111
Author(s):  
Dismas Kwirinus
Keyword(s):  
Safe Zone ◽  
Human Beings ◽  
Basic Framework

The consistency of the author describes many things about the fifteen themes in his book that human beings in life are still aware of their nature as intelligent animals. Pius Pandor explained the biographies and teachings of the great Greek philosophers, medieval, modern, and contemporary philosophers in order to specifically distinguish these themes, but the basic framework remains in Greek philosophers, especially Aristotle. The main purpose of this book is to take the reader slowly to understand and love philosophy. Understand and love philosophy with criticism and wisdom. Criticism means that philosophy is here to raise our awareness so as not to be carried away in the safe zone of life, but to dare to explore the dark alleys of life in a zone of challenge. While wisdom means that philosophy offers both depth and breadth of thinking horizons in the oceans of life.   Konsistensi penulis memaparkan banyak hal mengenai lima belas tema dalam bukunya bahwa manusia dalam hidup tetap menyadari kodaratnya sebagai binatang berakal budi. Pius Pandor memaparkan biografi serta ajaran para filsuf besar Yunani, filsuf abad pertengahan, modern, sampai dengan kontemporer untuk membedakan secara spesifik tema-tema itu, namun kerangka dasarnya tetap pada filsuf Yunani, terutama Aristoteles. Tujuan utama dari buku ini berusha untuk mengantar pembaca secara perlahan memahami dan mencintai filsafat. Memahami dan mencintai filsafat dengan kritik dan kebijaksanaan. Kritik berarti filsafat hadir untuk membangkitkan kesadaran kita agar tidak terhanyut dalam zona aman kehidupan, tetapi berani menelusuri lorong-lorong gelap kehidupan dalam zona tantangan. Sedangakan kebijaksanaan berarti filsafat menawarkan kedalaman sekaligus keluasan cakrawala berpikir dalam mengarungi samudera kehidupan.

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