Pelvic and Femoral Coordinates and Implant Alignment Representations in THA

2018 ◽  
pp. 75-88 ◽  
Author(s):  
Masaki Takao ◽  
Takashi Sakai ◽  
Hidetoshi Hamada ◽  
Nobuhiko Sugano
Keyword(s):  
Implant Alignment

scholarly journals Accuracy of Guided Implant Surgery in the Edentulous Jaw Using Desktop 3D-Printed Mucosal Supported Guides

2021 ◽  
Vol 10 (3) ◽  
pp. 391
Author(s):  
Rani D’haese ◽  
Tom Vrombaut ◽  
Geert Hommez ◽  
Hugo De Bruyn ◽  
Stefan Vandeweghe
Keyword(s):  
In Vitro Study ◽  
Angular Deviation ◽  
Implant Surgery ◽  
Implant Position ◽  
Surgical Guides ◽  
Negative Effect ◽  
Bone Level ◽  
3D Printed ◽  
Implant Alignment

Purpose: The aim of this in vitro study is to evaluate the accuracy of implant position using mucosal supported surgical guides, produced by a desktop 3D printer. Methods: Ninety implants (Bone Level Roxolid, 4.1 mm × 10 mm, Straumann, Villerat, Switzerland) were placed in fifteen mandibular casts (Bonemodels, Castellón de la Plana, Spain). A mucosa-supported guide was designed and printed for each of the fifteen casts. After placement of the implants, the location was assessed by scanning the cast and scan bodies with an intra-oral scanner (Primescan®, Dentsply Sirona, York, PA, USA). Two comparisons were performed: one with the mucosa as a reference, and one where only the implants were aligned. Angular, coronal and apical deviations were measured. Results: The mean implant angular deviation for tissue and implant alignment were 3.25° (SD 1.69°) and 2.39° (SD 1.42°) respectively, the coronal deviation 0.82 mm (SD 0.43 mm) and 0.45 mm (SD 0.31 mm) and the apical deviation 0.99 mm (SD 0.45 mm) and 0.71 mm (SD 0.43 mm). All three variables were significantly different between the tissue and implant alignment (p < 0.001). Conclusion: Based on the results of this study, we conclude that guided implant surgery using desktop 3D printed mucosa-supported guides has a clinically acceptable level of accuracy. The resilience of the mucosa has a negative effect on the guide stability and increases the deviation in implant position.

Variation in femoral anteversion in patients requiring total hip replacement

2019 ◽  
Vol 30 (3) ◽  
pp. 281-287
Author(s):  
Jim W Pierrepont ◽  
Ed Marel ◽  
Jonathan V Baré ◽  
Leonard R Walter ◽  
Catherine Z Stambouzou ◽  
...  
Keyword(s):  
Total Hip Replacement ◽  
Hip Replacement ◽  
Femoral Stem ◽  
Femoral Anteversion ◽  
Patient Specific ◽  
3 Dimensional ◽  
Total Hip ◽  
Age Related ◽  
Gender And Age ◽  
Implant Alignment

Background: Optimal implant alignment is important for total hip replacement (THR) longevity. Femoral stem anteversion is influenced by the native femoral anteversion. Knowing a patient’s femoral morphology is therefore important when planning optimal THR alignment. We investigated variation in femoral anteversion across a patient population requiring THR. Methods: Preoperatively, native femoral neck anteversion was measured from 3-dimensional CT reconstructions in 1215 patients. Results: The median femoral anteversion was 14.4° (−27.1–54.5°, IQR 7.4–20.9°). There were significant gender differences (males 12.7°, females 16.0°; p < 0.0001). Femoral anteversion in males decreased significantly with increasing age. 14% of patients had extreme anteversion (<0° or >30°). Conclusions: This is the largest series investigating native femoral anteversion in a THR population. Patient variation was large and was similar to published findings of a non-THR population. Gender and age-related differences were observed. Native femoral anteversion is patient-specific and should be considered when planning THR.

scholarly journals Robotic Assistance in Unicompartmental Knee Arthroplasty Results in Superior Early Functional Recovery and Is More Likely to Meet Patient Expectations

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Meredith P. Crizer ◽  
Amer Haffar ◽  
Andrew Battenberg ◽  
Mikayla McGrath ◽  
Ryan Sutton ◽  
...  
Keyword(s):  
Functional Recovery ◽  
Knee Arthroplasty ◽  
Unicompartmental Knee Arthroplasty ◽  
Mixed Model ◽  
Functional Score ◽  
Robotic Assistance ◽  
Pain Scores ◽  
Unicompartmental Knee ◽  
Implant Alignment ◽  
Early Functional Recovery

Robotic technology has reduced the errors of implant alignment in unicompartmental knee arthroplasty (UKA), but its impact on functional recovery after UKA is poorly defined. The purpose of this study was to compare early functional recovery, pain levels, and satisfaction in UKA performed with either robotic assistance or conventional methods. A retrospective analysis was performed on 89 matched consecutive patients who underwent outpatient UKA by a single physician using either conventional instruments (n = 39) or robotic methods (n = 50), with otherwise identical perioperative protocols. Outcomes studied included Lower Extremity Functional Score (LEFS), new Knee Society Score (KSS), Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOS-JR.), VR/SF-12, Visual Analog Scale (VAS) pain scores, and perioperative opioid consumption. Patients in the robotic cohort had superior early functional outcomes, with greater LEFS (conventional = 23; robotic = 31) at 1 week post-op p = 0.015 and KOOS-JR (conventional = 74; robotic = 81) at up to 6 months post-op p = 0.037 ; these two values remained statistically significant after mixed-model regression analysis p = 0.010 ; p = 0.023 , respectively. At 1 year post-op, expectations were more likely to be met in those who received robotic assistance p = 0.06 . No differences were reported with respect to postoperative opioid usage p = 0.320 , reoperations p = 1.00 , and complications p = 0.628 . Robotic-assisted UKA resulted in more rapid recovery and less early postoperative pain and were more likely to meet expectations than conventional UKA, although functional differences equilibrated by 1 year postoperatively. Further follow-up is necessary to determine if implant durability is impacted by robotics.

scholarly journals The Impact of Surgeon Volume and Training Status on Implant Alignment in Total Knee Arthroplasty

2019 ◽  
Vol 101 (19) ◽  
pp. 1713-1723 ◽  
Author(s):  
Gregory S. Kazarian ◽  
Charles M. Lawrie ◽  
Toby N. Barrack ◽  
Matthew J. Donaldson ◽  
Gary M. Miller ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Surgeon Volume ◽  
Training Status ◽  
Total Knee ◽  
Implant Alignment ◽  
The Impact ◽  
And Training

scholarly journals Preoperative Radiological Assessment of The Total Knee Arthroplasty

2021 ◽  
Author(s):  
Atilla Hikmet Cilengir ◽  
Suat Dursun ◽  
Kazım Ayberk Sinci ◽  
Özgür Tosun
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Clinical Results ◽  
Preoperative Imaging ◽  
Radiographic Evaluation ◽  
Prosthetic Material ◽  
Total Knee ◽  
Severity Of The Disease ◽  
Implant Alignment

Total knee arthroplasty (TKA) is a surgery method that can reduce symptoms and restore joint functions. Long-term success of this operation depends on the correct anatomical and mechanical planning before the prosthetic material implantation. Accurate implant alignment together with anatomical balance provides more successful clinical outcomes and longer duration of the prosthetic material. Improper preoperative planning may cause implant loosening and increased load on the knee joint. Conventional radiographs are the most frequently used imaging methods for this purpose. Computed tomography and magnetic resonance imaging may be used in required cases. In addition, computer-aided systems have come into use and successful results have been reported. Early radiographic evaluation is unnecessary after an uncomplicated TKA. Preoperative imaging has several aims such as to assess the severity of the disease, to analyze the reserve bone tissue, to review the relevant anatomy, and to decide which implant and surgical approach will be applied. In this article, we aimed to present the necessary and also auxiliary radiological evaluations made before TKA in order to achieve better clinical results.

Achievement of optimal implant alignment using taper wedge stems with cup-first THA through the MIS antero-lateral approach

2020 ◽  
Vol 30 (8) ◽  
pp. 1505-1514
Author(s):  
Taishi Okada ◽  
Shigeo Fukunishi ◽  
Shinichi Yoshiya ◽  
Toshiya Tachibana ◽  
Yuki Fujihara ◽  
...  
Keyword(s):  
Lateral Approach ◽  
Implant Alignment

Implant alignment in total elbow arthroplasty: conventional vs. navigated techniques

2009 ◽  
Author(s):  
Colin P. McDonald ◽  
James A. Johnson ◽  
Graham J. W. King ◽  
Terry M. Peters
Keyword(s):  
Total Elbow Arthroplasty ◽  
Elbow Arthroplasty ◽  
Implant Alignment
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