Comparison of analog and digital preoperative planning in total hip and knee arthroplasties

Diercks, Ron L.; Ooijen, Peter M. A. van; Horn, J.R. van

doi:10.1080/00016470510030364

Cited by 113 publications

(86 citation statements)

References 19 publications

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“…Most publications in leading orthopaedic journals have focused on the description and methodology involved in using the software [1] and, to the best of our knowledge, only one report on an analysis of its accuracy and friendliness has been published in the English literature [19,20]. This study was conducted to evaluate the utility and precision of digital preoperative templating for primary, conventional total hip arthroplasty for osteoarthritis.…”

Section: Discussionmentioning

confidence: 99%

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The utility and precision of analogue and digital preoperative planning for total hip arthroplasty

Valle

Comba

Taveras

et al. 2007

International Orthopaedics (SICO

100

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We prospectively compared the utility and precision of preoperative templating performed in printed films (analogue) with that performed on digital radiographs (digital) in 69 patients undergoing primary total hip replacement. Five patients were excluded when misplacement of the marker resulted in a magnification error greater that 10%; in the remaining patients (64 hips), the cup size was within ± one size in 62 (97%) of the analogue and 52 (81%) of the digital (p=0.01) plans. The stem size was within ± one size in 63 (98%) of the analogue and 60 (94%) of the digital (p=0.39) plans. The distance from the proximal corner of the lesser trochanter to the center of the prosthetic head (LTCD) in the analogue differed by 5 mm or more from the digital plan in nine cases (14%). Analogue preoperative planning yielded more predictable results than digital planning, particularly in terms of acetabular component size and LTCD that dictates limb lengtheningshortening. The sources of error were not clearly explained by variations in magnification. Inconsistent positioning of the magnification marker may jeopardise the safe implementation of digital templating.Résumé Nous avons, de façon prospective, comparé l'utilité et la précision de la planification préopératoire réalisée sur des films radiologiques classiques ou sur des radiographies numérisées sur 69 patients devant bénéficier d'une prothèse totale de hanche. 5 patients ont été exclus car il existait une erreur de plus de 10% sur le coefficient d'agrandissement et sur les 64 hanches restantes, la taille prévue de la cupule correspondant dans 97% des cas (62 hanches) sur les films classiques et dans 81% des cas (52 hanches) sur les films numérisés. La taille de la pièce fémorale était celle prévue dans 98% des cas (63 hanches) sur les films classiques, dans 94% des cas (60 hanches) sur les films numérisés. La distance entre bord proximal du petit trochanter et la tête prothétique (LTCD) sur les films classiques, n'a pas montré de différence de plus de 5 millimètres. Cette distance était supérieure dans 9 cas (14%) sur les films numérisés. Une planification pré opératoire est beaucoup plus fiable sur les films classiques que sur les films numérisés, particulièrement en ce qui concerne la taille du composant acétabulaire et les problèmes d'inégalité de longueurs. Les sources d'erreur ne sont pas très clairement expliquées par les modifications du taux d'agrandissement, la planification sur des clichés numérisés peut être source d'erreur.

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Section: Discussionmentioning

confidence: 99%

“…Several software packages for preoperative templating on digital images have been developed [1,19,20]. Consequently, digital preoperative planning should be as useful and precise as the traditional method of acetate templates superimposed on standardised radiographs [8].…”

mentioning

confidence: 99%

The utility and precision of analogue and digital preoperative planning for total hip arthroplasty

Valle

Comba

Taveras

et al. 2007

International Orthopaedics (SICO

100

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“…The development of digital radiography and Picture Archiving and Communication Systems has in turn led to the development of digital templating software. Several studies have looked at the validity and reliability of digital templating compared with analog templating [6,10,12,15,18,25]. Digital templating has been shown to have good reliability and validity [2,6,10,12,15,18,25].…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have looked at the validity and reliability of digital templating compared with analog templating [6,10,12,15,18,25]. Digital templating has been shown to have good reliability and validity [2,6,10,12,15,18,25]. However, digital templating requires the availability of digital templating software on numerous workstations and assumes that hospital IT departments will provide timely updates of the built-in templates within the software.…”

Section: Introductionmentioning

confidence: 99%

Acetate Templating on Digital Images Is More Accurate Than Computer-based Templating for Total Hip Arthroplasty

Petretta

Strelzow

Ohly

et al. 2015

Clinical Orthopaedics &Amp; Related Research

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Background Templating is an important aspect of preoperative planning for total hip arthroplasty and can help determine the size and positioning of the prosthesis. Historically, templating has been performed using acetate templates over printed radiographs. As a result of the increasing use of digital imaging, surgeons now either obtain additional printed radiographs solely for templating purposes or use specialized digital templating software, both of which carry additional cost. Questions/purposes The purposes of this study was to compare acetate templating of digitally calibrated images on an LCD monitor to digital templating in terms of (1) accuracy; (2) reproducibility; and (3) time efficiency.Methods Acetate onlay templating was performed directly over digital radiographs on an LCD monitor and was compared with digital templating. Five separate observers participated in this study templating on 52 total hip arthroplasties. For the acetate templating, the digital images were magnified to the scaled reference on the templates provided by the manufacturer (ratio 1.2:1) before templating using a 25-mm marker as a reference. Both the acetate and digital templating results were then compared with the actual implanted components to determine accuracy. Interobserver and intraobserver variability was determined by an intraclass correlation coefficient. Observers recorded time to complete templating from the time of complete upload of patients' imaging onto the system to completion of templating. Conclusions Acetate onlay templating on digitally calibrated images can be a reliable substitute for digital templating using specialized software. It is quicker to

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“…With the development of digital images, this conventional technique is gradually becoming impractical because film-based radiographs may no longer exist. Some studies have reviewed the utility of a digital templating technique [3,5,9,10,12,14,19], but most of them focussed on comparison of the accuracy between acetate templating and digital templating [3,9,10,12,14,19]. In most of these studies, the primary diagnosis of THA was osteoarthritis or was not specified (Table 1).…”

Section: Introductionmentioning

confidence: 99%

The utility of digital templating in Total Hip Arthroplasty with Crowe type II and III dysplastic hips

Zhao

Zhu

Zhao

et al. 2010

International Orthopaedics (SICOT)

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With the superiority of digital imaging, conventional preoperative acetate templating is gradually being replaced by digital templating in total hip arthroplasty (THA). The purpose of this study was to assess the utility of digital templating for patients with Crowe type II and III dysplastic hips. In this study, 41 THA patients with Crowe type II or III dysplastic hips and 48 THA patients with other primary diseases were retrospectively reviewed. All patients were fitted with cementless prostheses in 2008. For the THA patients with dysplastic hips, we attempted to restore their hip centres to the position of the true acetabulum. Digital templating was the method chosen to achieve hip centre restoration. The prosthesis prediction accuracy (within ± one size using digital templating) was 20 (48.8%) for the cup size and 30 (73.2%) for the stem size. Meanwhile, for patients with other primary diseases, the accuracy for the cup size within ± one size was 34 (70.8%) and for the stem size accuracy was within ± one size in 38 (79.2%). Between the two patient groups, there was a significant difference in the predicted cup size. In patients with dysplastic hips, the low accuracy of the predicted cup size may have resulted from difficulty in predicting the vertical location of the hip centre. Despite this limitation, preoperative planning using digital templating is a convenient technique for THA patients with Crowe type II and III dysplastic hips.

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Comparison of analog and digital preoperative planning in total hip and knee arthroplasties

Cited by 113 publications

References 19 publications

The utility and precision of analogue and digital preoperative planning for total hip arthroplasty

The utility and precision of analogue and digital preoperative planning for total hip arthroplasty

Acetate Templating on Digital Images Is More Accurate Than Computer-based Templating for Total Hip Arthroplasty

The utility of digital templating in Total Hip Arthroplasty with Crowe type II and III dysplastic hips

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