Analysis of Implant Alignment and Early Functional Results of Total Knee Replacement Performed Using Computer Navigation System

2009 ◽  
Vol 16 (3) ◽  
pp. 51-55
Author(s):  
Aleksey Ivanovich Petukhov ◽  
N N Kornilov ◽  
T A Kulyaba ◽  
R M Tikhilov ◽  
A V Selin ◽  
...  
Keyword(s):  
Navigation System ◽  
Sagittal Plane ◽  
Computer Navigation ◽  
Group Versus ◽  
Frontal Plane ◽  
Functional Results ◽  
Control Group ◽  
Computer Assisted ◽  
Computer Navigation System ◽  
Implant Alignment

Knee implant alignment analysis and comparative assessment of functional results of 47 total joint replacements with computer navigation system (main group) versus 50 conventional arthroplasties (control group) were performed. Computer assisted system improved the accuracy of limb alignment after knee arthroplasty and reduced the rate of deviations. The position of femoral component in frontal plane and tibial component in sagittal plane showed statistically reliable differences between two groups (p

FRONTAL STABILITY OF THE KNEE JOINT AFTER TKA USING A COMPUTER NAVIGATION SYSTEM

2021 ◽  
pp. 102-105
Author(s):  
Mohammad Ali Alqatawneh ◽  
◽  
E. V. Zhuk ◽  
P. I. Bespalchuk ◽  
◽  
...  
Keyword(s):  
Knee Joint ◽  
Navigation System ◽  
Computer Navigation ◽  
Group Versus ◽  
Frontal Plane ◽  
Functional Results ◽  
Control Group ◽  
Stress Tests ◽  
Computer Navigation System ◽  
Navigation Group

The article provides a comparative analysis of the functional results of total knee arthroplasty and knee postoperative stability in the frontal plane in 124 patients (22 men and 102 women) suffering from gonarthrosis, aged 51 to 83 years (average 69.8 years), operated on with using a standard technique (n = 62) or using a computer navigation system (n = 62), observed for 12 months from the moment of surgery. The use of the navigation system made it possible in a number of cases to achieve more accurate resection of the femur and tibia (deviations from the anatomical axis in 6.5 % of cases versus 19.4 % in the control group), as well as to provide the necessary soft tissue tension to achieve the most accurate balance of the knee joint during the entire range of motion after arthroplasty (stress tests founded frontal plain knee instability of the operated knee in 3.2 % cases in navigation group versus 8.1% cases in control group), however, no data on the reliable superiority of the functional results at the indicated follow-up time were found.

scholarly journals Accelerometer-Based Navigation in Total Knee Arthroplasty for the Management of Extra-Articular Deformity and Retained Femoral Hardware: Analysis of Component Alignment

Joints ◽  
2019 ◽  
Vol 07 (01) ◽  
pp. 001-007 ◽  
Author(s):  
Andrea Cozzi Lepri ◽  
Matteo Innocenti ◽  
Fabrizio Matassi ◽  
Marco Villano ◽  
Roberto Civinini ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Navigation System ◽  
Lower Limb ◽  
Sagittal Plane ◽  
Frontal Plane ◽  
Control Group ◽  
Navigation Systems ◽  
Level Of Evidence ◽  
Total Knee

Abstract Purpose Recent advances in total knee arthroplasty (TKA) include an accelerometer portable system designed to improve component position and alignment. The purpose of this study is to evaluate whether accelerometer navigation system can be a valuable option in complex TKAs for extra-articular deformity of the lower limb or in case of retained femoral hardware. Methods A group of 13 patients underwent TKA with an accelerometer navigation system. Three patients had a tibial extra-articular deformity, six had a femoral extra-articular deformity, and four had an intramedullary nail in the femur. Preoperative and postoperative mechanical axes were measured from full-length lower extremity radiographs to evaluate alignment. The alignment of prosthetic components in the frontal and sagittal planes was determined by postoperative radiographs. Results At 30-days postoperative radiographic check, the hip knee ankle angle was within 2.0° (0 ± 1) of the neutral mechanical axis. The alignment of the tibial component on the frontal plane was 90.0° (range 89–91) and on the sagittal plane 5.0° (range 3–7). The alignment of the femoral component on the frontal plane was 90.0° (range 89–91) and on the sagittal plane 3.0° (range 0–5). Conclusion The alignment of the prosthetic components has been accurate and comparable to other navigation systems in literature without any increase in surgical times. The accelerometer-based navigation system is therefore a useful technique that can be used to optimize TKA alignment in patients with extra-articular deformity or with lower limb hardware, where the intramedullary guides cannot be applied. Level of Evidence This is an observational study without a control group, Level III.

DEFORMATION AND CONTRACTURE OF KNEE JOINT

2021 ◽  
pp. 12-18
Author(s):  
M.А. Alqatawneh ◽  
◽  
E.V. Zhuk ◽  
P.I. Bespalchuk ◽  
◽  
...  
Keyword(s):  
Navigation System ◽  
Computer Navigation ◽  
Standard Technique ◽  
Functional Results ◽  
Control Group ◽  
Optimal Range ◽  
Total Knee ◽  
The Moment ◽  
Significant Superiority

The article provides a comparative analysis of the functional results of total knee arthroplasty and its postoperative deformity and contracture in 124 patients (22 men and 102 women) suffering from gonarthrosis, aged 51 to 83 years (average 69.8 years), operated on with using a standard technique (n = 62) or using a computer navigation system (n = 62), observed for 12 months, from the moment of surgery. The use of the navigation system made it possible in a number of cases to achieve more accurate resection of the femur and tibia (6.5 % of cases of deviations from the anatomical axis versus 19.4 % in the control group), as well as to determine the degree of deformity and severity of contracture to achieve the most optimal range of motion after endopresthetics (3.2 % versus 8.1 %), however, there was no evidence of a significant superiority of functional results within the indicated follow-up period.

scholarly journals Accuracy Evaluation of Surface-Based Registration Methods in a Computer Navigation System for Hip Surgery Performed Through a Posterolateral Approach

2001 ◽  
Vol 6 (4) ◽  
pp. 195-203 ◽  
Author(s):  
Nobuhiko Sugano ◽  
Toshihiko Sasama ◽  
Yoshinobu Sato ◽  
Yoshikazu Nakajima ◽  
Takashi Nishii ◽  
...  
Keyword(s):  
Navigation System ◽  
Computer Navigation ◽  
Hip Surgery ◽  
Posterolateral Approach ◽  
Accuracy Evaluation ◽  
Computer Navigation System

Computer-Assisted Surgery Using 3D Printed Saw Guides for Acute Correction of Antebrachial Angular Limb Deformities in Dogs

2019 ◽  
Vol 32 (03) ◽  
pp. 241-249 ◽  
Author(s):  
Andrew Worth ◽  
Katherine Crosse ◽  
Andrew Kersley
Keyword(s):  
Computer Aided Design ◽  
Sagittal Plane ◽  
Three Dimensional ◽  
Frontal Plane ◽  
Computer Assisted Surgery ◽  
Computer Assisted ◽  
Computed Tomographic ◽  
Limb Deformities ◽  
Ct Data ◽  
Saw Blade

Objective The aim of this study was to report the use of custom saw guides produced using computed tomographic imaging (CT), computer simulation and three-dimensional (3D) printing to aid surgical correction of antebrachial deformities in six dogs. Materials and Methods Antebrachial limb deformities in four small, and two large, breed dogs (seven limbs) were surgically corrected by a radial closing wedge ostectomy and ulnar osteotomy. The location and orientation of the wedge ostectomy were determined using CT data, computer-assisted planning and production of a saw guide in plastic using a 3D printer. At surgery, the guide was clamped to the surface of the radius and used to direct the oscillating saw blade. The resultant ostectomy was closed and stabilized with a bone plate. Results Five limbs healed without complications. One limb was re-operated due to a poorly resolved rotational component of the deformity. One limb required additional stabilisation with external fixation due to screw loosening. The owners of five dogs completed a Canine Orthopedic Index survey at a follow-up period of 37 to 81 months. The median preoperative score was 3.5 and the median postoperative score was 1, representing an overall positive effect of surgery. Radiographically, 5/7 limbs were corrected in the frontal plane (2/7 were under-corrected). Similarly, 5/7 limbs were corrected in the sagittal plane, and 2/7 were over-corrected in the sagittal place. Conclusions Computer-aided design and rapid prototyping technologies can be used to create saw guides to simplify one-stage corrective osteotomies of the antebrachium using internal fixation in dogs. Despite the encouraging results, accurate correction of rotational deformity was problematic and this aspect requires further development.

scholarly journals A new inertial navigation system for guiding implant placement. An in-vitro proof-of-concept study

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0255481
Author(s):  
G. Esteve-Pardo ◽  
L. Esteve-Colomina ◽  
E. Fernández
Keyword(s):  
Dental Implant ◽  
Navigation System ◽  
Inertial Navigation System ◽  
Computer Navigation ◽  
Inertial Navigation ◽  
Test Group ◽  
Control Group ◽  
Angular Deviation ◽  
Processing Unit ◽  
Implant Placement

The aim of this study was to assess the potential use of a new advanced inertial navigation system for guiding dental implant placement and to compare this approach with standard stereolithographic template guiding. A movement processing unit with a 9-axis absolute orientation sensor was adapted to a surgical handpiece and wired to a computer navigation interface. Sixty implants were placed by 10 operators in 20 jaw models. The 30 implants of the test group were placed in 10 models guided by the new inertial navigation prototype. The 30 implants of the control group were placed in another 10 models using a CAD-CAM template. Both groups were subdivided into experienced and non-experienced operators. Pre- and postoperative computer tomography images were obtained and matched to compare the planned and final implant positions. Four deviation parameters (global, angular, depth, and lateral deviation) were defined and calculated. The primary outcome was the angular deviation between the standard stereolithographic approach and the new inertial navigation system. Results showed no significant differences between both groups, suggesting that surgical navigation based on inertial measurement units (IMUs) could potentially be useful for guiding dental implant placement. However, more studies are still needed to translate this new approach into clinical practice.

Semi-automatic guidance of a biopsy catheter to peripheral airways targets using a novel robotic and computer navigation system

2019 ◽  
Vol 12 ◽  
pp. 304-308 ◽  
Author(s):  
Lucian Gheorghe Gruionu ◽  
Cătălin Constantinescu ◽  
Andreea Şoimu-Iacob ◽  
Cătălin Ciobîrcă ◽  
Anca Udriştoiu ◽  
...  
Keyword(s):  
Navigation System ◽  
Computer Navigation ◽  
Peripheral Airways ◽  
Computer Navigation System ◽  
Automatic Guidance

Computer-assisted retinal vessel diameter evaluation in Fabry disease

2019 ◽  
pp. 112067211988698
Author(s):  
Andrea Sodi ◽  
Cristina Nicolosi ◽  
Giulio Vicini ◽  
Chiara Lenzetti ◽  
Gianni Virgili ◽  
...  
Keyword(s):  
Fabry Disease ◽  
Group Versus ◽  
Retinal Vessel ◽  
Vessel Diameter ◽  
Vascular Involvement ◽  
Control Group ◽  
Computer Assisted ◽  
Retinal Vessel Diameter ◽  
Group A ◽  
Group B

Purpose: Fabry disease retinal vascular involvement has been widely reported, with narrowing of the retinal arterioles, dilation and irregularity of the retinal veins, and exaggerated tortuosity of the retinal vessels. We evaluated retinal vessel diameter in Fabry disease, by means of a dedicated software, aiming to provide a quantitative marker of retinal vascular network abnormalities in Fabry disease patients. Material and methods: Observational case-control study evaluating different branches of vessels, peripapillary vessels (group A), temporal vascular arcades (group B), and second-order collaterals of the temporal arcades (group C). We obtained the vessel diameters values from eye fundus digital images of eight Fabry disease patients and eight age-sex matched controls, using a semiautomatic software. Mann–Whitney test was used to compare the Fabry disease group versus the control group. Results: The difference between the average diameters of all the types of vessels considered were significantly smaller in Fabry disease patients compared to healthy controls, resulting in a decrease in size (mm) of 10.9% for group A, 7.8% for group B, and 7.4% for group C. The most evident difference between Fabry disease patients and controls was found in the largest vessels. Conclusion: A computer-assisted analysis of retinal vessel diameter in Fabry disease by means of dedicated software showed narrower retinal arteries in Fabry disease patients than in controls. Our data support the use of semiautomatic assessment of retinal vessel attenuation as an objective and reproducible method to evaluate retinal vascular alterations in Fabry disease, providing a clinical non-invasive tool for early diagnosis and disease monitoring.

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