scholarly journals Implications of component size and calibration error on digital templating for total hip arthroplasty. A visual matrix from a simple mathematical model

2021 ◽  
Author(s):  
Christoph Kolja Boese ◽  
Tim Rolvien ◽  
Matthias Trost ◽  
Michael Frink ◽  
Jan Hubert ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Standard Procedure ◽  
Calibration Error ◽  
Optimal Size ◽  
Linear Calibration ◽  
Component Size ◽  
Digital Templating ◽  
Total Hip ◽  
Implant Size

Abstract Objective Preoperative digital templating is a standard procedure in total hip arthroplasty. Deviations between template size and final implant size may result from inaccurate calibration, templating as well as intraoperative decisions. So far, the explicit effect of calibration errors on templating has not been addressed adequately. Materials and Methods A mathematical simulation of calibration errors up to ± 24% was applied to the templating of acetabular cups (38 to 72 mm diameter). The effect of calibration errors on template component size as deviation from optimal size was calculated. Results The relationship between calibration error and component size deviation is inverse and linear. Calibration errors have a more pronounced effect on larger component sizes. Calibration errors of 2–6% result in templating errors of up to two component sizes. Common errors of up to 12% may result in templating errors of 3–4 sizes for common implant sizes. A tabular matrix visualizes the effect. Conclusion Calibration errors play a significant role in component size selection during digital templating. Orthopedic surgeons should be aware of this effect and try to identify and address this source of error.

scholarly journals The accuracy of digital templating in cementless total hip arthroplasty in dysplastic hips

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Emelie Kristoffersson ◽  
Volker Otten ◽  
Sead Crnalic
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Femoral Stem ◽  
Developmental Dysplasia ◽  
Leg Length ◽  
Acetabular Cup ◽  
Digital Templating ◽  
Total Hip ◽  
Implant Size ◽  
Crowe Classification

Abstract Background Total hip arthroplasty (THA) for developmental dysplasia of the hip (DDH) is a complex procedure due to associated anatomical abnormalities. We studied the extent to which preoperative digital templating is reliable when performing cementless THA in patients with DDH. Methods We templated and compared the pre- and postoperative sizes of the acetabular and femoral components and the center of rotation (COR), and analysed the postoperative cup coverage, leg length discrepancy (LLD), and stem alignment in 50 patients (56 hips) with DDH treated with THA. Results The implant size exactly matched the template size in 42.9% of cases for the acetabular component and in 38.2% of cases for the femoral component, whereas the templated ±1 size was used in 80.4 and 81.8% of cases for the acetabular and femoral components, respectively. There were no statistically significant differences between templated and used component sizes among different DDH severity levels (acetabular cup: p = 0.30 under the Crowe classification and p = 0.94 under the Hartofilakidis classification; femoral stem: p = 0.98 and p = 0.74, respectively). There were no statistically significant differences between the planned and postoperative COR (p = 0.14 horizontally and p = 0.52 vertically). The median postoperative LLD was 7 (range 0–37) mm. Conclusion Digital preoperative templating is reliable in the planning of cementless THA in patients with DDH.

scholarly journals Templating Hip Arthroplasty

2019 ◽  
Vol 7 (4) ◽  
pp. 672-685 ◽  
Author(s):  
Amro Alnahhal ◽  
Nayef Aslam-Pervez ◽  
Hassaan Q. Sheikh
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Reliable Method ◽  
Systemic Review ◽  
Cochrane Central Register ◽  
Digital Templating ◽  
Total Hip ◽  
Preoperative Templating ◽  
Central Register ◽  
Implant Size

BACKGROUND: Different methods have been developed and employed with variable degrees of success in pre-operative templating for total hip arthroplasty. Preoperative templating, especially digital templating, has been claimed to have increased the effectiveness of total hip arthroplasty by improving the precision of prediction of prosthetic implant size. AIMS: The overall aim of this systematic review is to identify whether the use of pre-operative templating in total hip arthroplasty procedures has resulted in increased accuracy, reliability and precision of the procedure. Various methods of templating, like traditional acetate overlay and digital method of templating that includes a single radiographic marker and double radiographic marker methods, have been compared to establish the most reliable method of templating. METHODS: We searched the PubMed, Google Scholar Cochrane Central Register of Controlled Trials (CENTRAL), and MEDLINE (1966 to present), EMBASE (1980 to present), CINAHL (1982 to present), Psych INFO (1967 to present) and Clinical Trials Gov. CONCLUSION: The results of this systemic review suggest that preoperative templating is resulting in an enormous increase in the accuracy of total hip arthroplasty and among various methods, King Mark is the most reliable method.

scholarly journals Digital templating in total hip arthroplasty using contralateral healthy hip results in decreased accuracy

2021 ◽  
Vol 87 (3) ◽  
pp. 427-433
Author(s):  
Ittai Shichman ◽  
Or Shaked ◽  
Samuel Morgan ◽  
Simon Garceau ◽  
Nimrod Snir ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Joint ◽  
Hip Arthroplasty ◽  
Femoral Stem ◽  
Contralateral Side ◽  
Acetabular Cup ◽  
Component Size ◽  
Digital Templating ◽  
Total Hip ◽  
Healthy Side

The accuracy of pre-operative digital templating for total hip arthroplasty (THA) using the diseased versus unaffected contralateral joint remains unclear. As such, we devised a study to compare templating precision between the operated hip joint versus the healthy side for patients with osteoarthritis (OA). The study hypothesis was that preoperative templating accuracy of THA on the ipsilateral diseased hip joint would be higher compared to the contralateral healthy hip in patients with OA. We retrospectively reviewed 100 patients who underwent THA for unilateral OA at our center from January 2018 to January 2020. Retrospective preoperative digital templating was performed separately on both the operated hip joint and the healthy contralateral hip joint by a single surgeon who was blinded by the in-situ components sizes. Accuracy of each group was compared to the implanted components. Assessment of the 100 included cases demonstrated superior acetabular component size prediction when templating was performed using the diseased hip compared to the healthy contralateral side (68.0% versus 51.0%, p<0.001). No differences between the cohorts were found regarding templating accuracy of femoral stem sizes (72.0% and 69.0%, p=0.375) or neck offset (73.0% and 69.0%, p=0.289). Templating acetabular cup size using the ipsilateral diseased hip is more accurate than using the contralateral healthy hip in patients with unilateral OA.

scholarly journals A comparison study of digital templating methods in total hip arthroplasty

2013 ◽  
Vol 11 (8) ◽  
pp. 662-663
Author(s):  
Stephen McCain ◽  
Laurence Cusick ◽  
Gavan McAlinden
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Comparison Study ◽  
Digital Templating ◽  
Total Hip

Digital templating in total hip arthroplasty with the Mayo stem

2007 ◽  
Vol 128 (10) ◽  
pp. 1023-1029 ◽  
Author(s):  
Christian Wedemeyer ◽  
Henning Quitmann ◽  
Jie Xu ◽  
Hansjoerg Heep ◽  
Marius von Knoch ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Digital Templating ◽  
Total Hip

Is computerised 3D templating more accurate than 2D templating to predict size of components in primary total hip arthroplasty?

2018 ◽  
Vol 29 (3) ◽  
pp. 270-275 ◽  
Author(s):  
Erik Schiffner ◽  
David Latz ◽  
Pascal Jungbluth ◽  
Jan P Grassmann ◽  
Stephan Tanner ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Preoperative Diagnosis ◽  
3 Dimensional ◽  
Total Hip ◽  
Primary Thas ◽  
Implant Size ◽  
The Difference ◽  
Primary Total Hip Arthroplasty

Introduction: The aim of this study was to compare the accuracy of preoperative templating in total hip arthroplasty (THA) using conventional 2-dimensional (2D) and computed tomography (CT)-based 3-dimensional (3D) measures. Methods: One hundred and sixteen consecutive primary THAs were analysed. The preoperative diagnosis was primary osteoarthritis in all cases. The 2D templating and the 3D templating were performed by two different residents. All templating results were available for the orthopaedic surgeon performing the procedure. Accuracies with regard to the predicted and actual implant sizes were determined for each procedure. Implantation of the size as planned was defined as “exact”, whereas the use of components within one size larger or smaller (±1) as planned were defined as “accurate.” Results: The 3D templating was significantly more accurate in predicting implant sizing compared to 2D templating for primary total hip arthroplasty (THA). The difference was statistically significant for the cup templating (‘‘exact’’ p = 0.02; ‘‘accurate’’ p = 0.01) and for the stem templating (‘‘exact’’ p = 0.04; ‘‘accurate’’ p = 0.01). Conclusion: Our results support the superiority of 3D templating over 2D templating in predicting implant size.

The Accuracy of Digital Templating in Uncemented Total Hip Arthroplasty

2010 ◽  
Vol 25 (4) ◽  
pp. 529-532 ◽  
Author(s):  
Patrick Gamble ◽  
Justin de Beer ◽  
Danielle Petruccelli ◽  
Mitchell Winemaker
Keyword(s):  
Total Hip Arthroplasty ◽  
Hip Arthroplasty ◽  
Digital Templating ◽  
Total Hip ◽  
Uncemented Total Hip Arthroplasty
Sign in / Sign up

Export Citation Format

Share Document