scholarly journals TissueCyte Installation And Alignment Guide v4 (protocols.io.ber2jd8e)

protocols.io ◽  
2020 ◽  
Author(s):  
Allen Institute
Keyword(s):  
Alignment Guide

The Adjustment of the Rotational Alignment of the Distal End of the Extramedullary Guide to the Anteroposterior Axis of the Proximal Tibia in Total Knee Arthroplasty

2021 ◽  
Author(s):  
Hideki Mizu-uchi ◽  
Hidehiko Kido ◽  
Tomonao Chikama ◽  
Kenta Kamo ◽  
Satoshi Kido ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Navigation System ◽  
Proximal Tibia ◽  
Rotational Alignment ◽  
Coronal Alignment ◽  
Ideal Position ◽  
Total Knee ◽  
Alignment Guide ◽  
The Ideal

AbstractThe optimal placement within 3 degrees in coronal alignment was reportedly achieved in only 60 to 80% of patients when using an extramedullary alignment guide for the tibial side in total knee arthroplasty (TKA). This probably occurs because the extramedullary alignment guide is easily affected by the position of the ankle joint which is difficult to define by tibial torsion. Rotational direction of distal end of the extramedullary guide should be aligned to the anteroposterior (AP) axis of the proximal tibia to acquire optimal coronal alignment in the computer simulation studies; however, its efficacy has not been proven in a clinical setting. The distal end of the guide can be overly displaced from the ideal position when using a conventional guide system despite the alignment of the AP axis to the proximal tibia. This study investigated the effect of displacement of the distal end of extramedullary guide relative to the tibial coronal alignment while adjusting the rotational alignment of the distal end to the AP axis of the proximal tibia in TKA. A total of 50 TKAs performed in 50 varus osteoarthritic knees using an image-free navigation system were included in this study. The rotational alignment of the proximal side of the guide was adjusted to the AP axis of the proximal tibia. The position of the distal end of the guide was aligned to the center of the ankle joint as viewed from the proximal AP axis (ideal position) and as determined by the navigation system. The tibial intraoperative coronal alignments were recorded as the distal end was moved from the ideal position at 3-mm intervals. The intraoperative alignments were 0.5, 0.9, and 1.4 degrees in valgus alignment with 3-, 6-, and 9-mm medial displacements, respectively. The intraoperative alignments were 0.7, 1.2, and 1.7 degrees in varus alignment with 3-, 6-, and 9-mm lateral displacements, respectively. In conclusion, the acceptable tibial coronal alignment (within 2 degrees from the optimal alignment) can be achieved, although some displacement of the distal end from the ideal position can occur after the rotational alignment of the distal end of the guide is adjusted to the AP axis of the proximal tibia.

scholarly journals Is the alignment guide technique in total hip arthroplasty sufficient for accurate cup positioning with a modified Watson Jones approach?

2018 ◽  
Vol 26 (3) ◽  
pp. 230949901880664 ◽  
Author(s):  
Junya Yoshitani ◽  
Takuya Nakamura ◽  
Yoshinobu Maruhashi ◽  
Noriyuki Hashimoto ◽  
Takeshi Sasagawa ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Safe Zone ◽  
Lateral Decubitus Position ◽  
Total Hip ◽  
Logistic Analysis ◽  
Final Sample ◽  
Lateral Decubitus ◽  
Cup Positioning ◽  
Alignment Guide

Purpose: Cup setting with only an alignment guide has been reported to be inaccurate in the lateral decubitus position in total hip arthroplasty (THA). We assessed the accuracy of cup positioning using only the alignment guide technique via a modified Watson Jones approach in the lateral decubitus position. Methods: Two hundred hips of 189 patients underwent THA from October 2014 to September 2016 via a modified Watson Jones approach. In the final sample, 181 hips of 171 patients (35 males, 136 females) were included in this investigation. The alignment of the cup was evaluated by an anteroposterior radiograph of the pelvis 1 week after surgery. Measurements were divided into safe zone determined by Callanan and Lewinnek. Results: There were 168 (92.8%) acetabular cups that were placed within the safe zone for both inclination and anteversion based on the safe zones defined by Lewinnek, and 134 (74%) acetabular cups that were placed within the safe zone defined by Callanan. Multiple logistic analysis showed that the laterality and the addition of the confirmation method were indicators for malpositioning of combined inclination and anteversion. Conclusion: Our data suggested that even if special tools were not used in the lateral decubitus position, using only the alignment guide enabled cup positioning to be achieved with 92.8% accuracy in the Lewinnek safe zone and 74% accuracy in the Callanan safe zone. Multiple logistic analysis showed that the laterality and the addition of a confirmation alignment guide influenced the accuracy of cup positioning.

Use of a custom alignment guide to improve glenoid component position in total shoulder arthroplasty

2012 ◽  
Vol 21 (12) ◽  
pp. 2860-2866 ◽  
Author(s):  
Eduardo M. Suero ◽  
Musa Citak ◽  
Darrick Lo ◽  
Aaron J. Krych ◽  
Edward V. Craig ◽  
...  
Keyword(s):  
Shoulder Arthroplasty ◽  
Total Shoulder Arthroplasty ◽  
Glenoid Component ◽  
Component Position ◽  
Alignment Guide

Comparison of accuracy of cup position using portable navigation versus alignment guide in total hip arthroplasty in supine position

2020 ◽  
pp. 112070002090878 ◽  
Author(s):  
Masanori Okamoto ◽  
Masashi Kawasaki ◽  
Toshiaki Okura ◽  
Satoshi Ochiai ◽  
Hiroyuki Yokoi
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Supine Position ◽  
Navigation System ◽  
Direct Anterior Approach ◽  
Navigation Systems ◽  
Total Hip ◽  
Navigation Group ◽  
Portable Navigation ◽  
Alignment Guide

Background: Accelerometer-based portable navigation systems in supine total hip arthroplasty (THA) have been developed, but there are no reports on the accuracy of cup placement. We aimed to investigate and compare the accuracy of the accelerometer-based portable navigation system versus the acetabular alignment guide placed on the pelvis in THA using the direct anterior approach (DAA). Both devices tracked changes in the pelvic position. Methods: In this single-centre, retrospective study, we reviewed 115 hips in 113 patients who underwent primary THA via the DAA using an accelerometer-based portable navigation system in the supine position (portable navigation group) and 106 hips in 101 patients who underwent THA using an acetabular alignment guide (alignment guide group) as controls. Hips were evaluated postoperatively using computed tomography to measure cup orientation. The accuracy of cup orientation was compared between the 2 groups. Results: Absolute values of inclination error were 3.1° ± 2.2° and 2.9° ± 2.3° ( p = 0.708) in the portable navigation and alignment guide groups and those of anteversion error were 2.8° ± 2.3° and 3.7° ± 2.7°, respectively ( p = 0.005). The number of cups placed within 10° of error was 98.3% and 96.2% in the portable navigation and alignment guide groups, respectively ( p = 0.304). The portable navigation group had significantly more hips (72.2%) placed within a 5° margin of error than did the alignment guide group (56.6%) ( p = 0.016). Conclusion: High accuracy in cup placement was achieved using accelerometer-based portable navigation in supine THA. Using a navigation system may contribute to improved long-term outcomes.

Evaluation of a Patient Specific Femoral Alignment Guide for Hip Resurfacing

2014 ◽  
Vol 29 (3) ◽  
pp. 590-595 ◽  
Author(s):  
Michael Olsen ◽  
Douglas D. Naudie ◽  
Max R. Edwards ◽  
Michael E. Sellan ◽  
Richard W. McCalden ◽  
...  
Keyword(s):  
Hip Resurfacing ◽  
Patient Specific ◽  
Alignment Guide

Comparison of a mechanical acetabular alignment guide with computer placement of the socket

2002 ◽  
Vol 17 (3) ◽  
pp. 359-364 ◽  
Author(s):  
Anthony M. DiGioia ◽  
Branislav Jaramaz ◽  
Anton Y. Plakseychuk ◽  
James E. Moody ◽  
Constantinos Nikou ◽  
...  
Keyword(s):  
Alignment Guide

Case Report: How May Ocular Alignment Guide the Topography of the Lesion

2019 ◽  
Vol 11 (4) ◽  
pp. 1-6
Author(s):  
Cucchiara María Camila ◽  
Zalazar Guillermo ◽  
Bernaba Elisabet
Keyword(s):  
Case Report ◽  
Alignment Guide

Anterior border of the tibia as a landmark for extramedullary alignment guide in total knee arthroplasty for varus knees

2011 ◽  
Vol 29 (6) ◽  
pp. 919-924 ◽  
Author(s):  
Shingo Fukagawa ◽  
Shuichi Matsuda ◽  
Hiroaki Mitsuyasu ◽  
Hiromasa Miura ◽  
Ken Okazaki ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Anterior Border ◽  
Total Knee ◽  
Alignment Guide
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