Interview with Professor Anders Odgaard - Avoiding Implant Selection Errors

OrthoMedia ◽  
2021 ◽  
Keyword(s):  
Implant Selection

Methods and importance of volume measurement in reconstructive and aesthetic breast surgery

2014 ◽  
Vol 155 (11) ◽  
pp. 407-413 ◽  
Author(s):  
Csaba Kunos ◽  
Gusztáv Gulyás ◽  
Pál Pesthy ◽  
Eszter Kovács ◽  
Zoltán Mátrai
Keyword(s):  
Magnetic Resonance ◽  
Surgical Planning ◽  
Volume Measurement ◽  
Tumor Removal ◽  
Breast Asymmetry ◽  
Breast Parenchyma ◽  
Implant Selection ◽  
The Difference ◽  
Aesthetic Breast ◽  
Measured Volume

Volume measurment of the breast allows for better surgical planning and implant selection in breast reconstructive and symmetrization procedures. The safety and accuracy of tumor removal, in accordance with oncoplastic principles, may be imporved by knowing the true breast- and breast tumor volume. The authors discuss the methods of volume measurement of the breast and describe the method based on magnetic resonance imaging digital volume measurment in details. The volume of the breast parenchyma and the tumor was determined by processing the diagnostic magnetic resonance scans, and the difference in the volume of the two breasts was measured. Surgery was planned and implant selection was made based on the measured volume details. The authors conclude that digital volume measurement proved to be a valuable tool in preoperative planning of volume reducing mammaplasty, replacement of unknown size implants and in cases when breast asymmetry is treated. Orv. Hetil., 2014, 155(11), 407–413.

scholarly journals Correlation analysis of resected breast tissue and implant volume after mastectomy and its association with breast density

2021 ◽  
Author(s):  
Wolfram Malter ◽  
Bo Jan Bachmann ◽  
Barbara Krug ◽  
Martin Hellmich ◽  
Max Zinser ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Breast Density ◽  
Breast Tissue ◽  
Mathematical Function ◽  
Breast Cancer Patients ◽  
Tissue Weight ◽  
Implant Selection ◽  
Volume Measurements ◽  
The Individual ◽  
The Ideal

Abstract Background The current methods for calculating the ideal implant volume for breast reconstruction are based on pre- or intraoperative volume measurements of the existing breast volume and do not take into account the individual breast density of the woman. This study aims is to identify objective parameters that can help to improve the optimal implant selection. Materials and methods This retrospective analysis includes 198 breast cancer patients who underwent mastectomy. Breast densities (ACR) measured in mammography and MRI were compared with the removed breast tissue weight and volume of the implants used. In addition, the resected weight was compared directly with the implant volume to calculate a mathematical function. Results There was no significant correlation between the ACR values and the resected weights [correlation coefficient: mammography:− 0.117 (p = 0.176), MRI − 0.033 (p = 0.756)]. A negative correlation between the implant volumes and both imaging methods could be demonstrated [correlation coefficient: mammography − 0.268; p = 0.002; MRI was − 0.200 (p = 0.055)]. A highly significant correlation between the resected weights and the implant volumes (correlation coefficient 0.744; p < 0.001) was observed. This correlation corresponds to a power function (y = 34.71 x0.39), in which any resected weight can be used for the variable x to calculate the implant volume. Conclusion We were able to show that there is a significant correlation between the resected breast tissue and the implant volume. With our novel potency function, the appropriate implant volume can be calculated for any resected weight making it easier for the surgeon to choose a fitting implant in a simple and more objective manner.

scholarly journals Prospective surgical solutions in degenerative spine: spinal simulation for optimal choice of implant and targeted device development

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Monique Salchow-Gille ◽  
Bernhard Rieger ◽  
Clemens Reinshagen ◽  
Marek Molcanyi ◽  
Joschka Lemke ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Functional Model ◽  
Neck Disability Index ◽  
Optimal Choice ◽  
Segmental Motion ◽  
X Rays ◽  
Device Development ◽  
Single Segment ◽  
Implant Selection ◽  
Adjacent Segments

Abstract Objectives The most important goal of surgical treatment for spinal degeneration, in addition to eliminating the underlying pathology, is to preserve the biomechanically relevant structures. If degeneration destroys biomechanics, the single segment must either be surgically stabilized or functionally replaced by prosthetic restoration. This study examines how software-based presurgical simulation affects device selection and device development. Methods Based on videofluoroscopic motion recordings and pixel-precise processing of the segmental motion patterns, a software-based surrogate functional model was validated. It characterizes the individual movement of spinal segments relative to corresponding cervical or lumbar spine sections. The single segment-based motion of cervical or lumbar spine of individual patients can be simulated, if size-calibrated functional X-rays of the relevant spine section are available. The software plug-in “biokinemetric triangle” has been then integrated into this software to perform comparative segmental motion analyses before and after treatment in two cervical device studies: the correlation of implant-induced changes in the movement geometry and patient-related outcome was examined to investigate, whether this surrogate model could provide a guideline for implant selection and future implant development. Results For its validation in 253 randomly selected patients requiring single-level cervical (n=122) or lumbar (n=131) implant-supported restoration, the biokinemetric triangle provided significant pattern recognition in comparable investigations (p<0.05) and the software detected device-specific changes after implant-treatment (p<0.01). Subsequently, 104 patients, who underwent cervical discectomy, showed a correlation of the neck disability index with implant-specific changes in their segmental movement geometry: the preoperative simulation supported the best choice of surgical implants, since the best outcome resulted from restricting the extent of the movement of adjacent segments influenced by the technical mechanism of the respective device (p<0.05). Conclusions The implant restoration resulted in best outcome which modified intersegmental communication in a way that the segments adjacent to the implanted segment undergo less change in their own movement geometry. Based on our software-surrogate, individualized devices could be created that slow down further degeneration of adjacent segments by influencing the intersegmental communication of the motion segments.

215 Implant Selection Patterns and Reoperation Rates Amongst HIV Positive and Negative Patients that Underwent Penile Prosthesis Surgery

2018 ◽  
Vol 15 (2) ◽  
pp. S72
Author(s):  
G. Moran ◽  
D. Asafu-Adjei ◽  
G. Li ◽  
M. Lipsky ◽  
D. Stember ◽  
...  
Keyword(s):  
Penile Prosthesis ◽  
Hiv Positive ◽  
Implant Selection ◽  
Reoperation Rates

scholarly journals A Pilot Study Evaluation of Three-Dimensional Imaging in Cosmetic Breast Augmentation: Results of a Single Surgeon 3.5 Year Retrospective Study Using the BREAST-Q Questionnaire

2021 ◽  
Author(s):  
Lauren E Hutchinson ◽  
Andrea D Castaldo ◽  
Cedar H Malone ◽  
Nicole Z Sommer ◽  
Ashley N Amalfi
Keyword(s):  
Patient Satisfaction ◽  
Breast Augmentation ◽  
3D Imaging ◽  
Breast Implant ◽  
Three Dimensional ◽  
Well Being ◽  
Three Dimensional Imaging ◽  
Size Selection ◽  
Implant Size ◽  
Implant Selection

Abstract Background Traditional methods of breast implant size selection provide limited ability to demonstrate postoperative outcomes. Three-dimensional imaging provides an opportunity for improved patient evaluation, surgical planning, and evaluation of postoperative breast appearance. Objectives We hypothesized that preoperative 3D imaging for patients undergoing breast augmentation would improve patient satisfaction and understanding of expected surgical outcomes. Methods A retrospective review of patients undergoing breast augmentation by a single surgeon over a 3.5-year period was performed. Patients presenting after the VECTRA was purchased had preoperative 3D imaging, while patients presenting before this did not. Eligible patients received a BREAST-Q questionnaire designed for postoperative evaluation of breast augmentation. They also received a second survey that evaluated expected versus actual breast outcomes. Results 120 surveys were mailed and 61 patients (50.8%) returned the survey. The 3D imaged group had improved BREAST-Q scores regarding satisfaction with outcome, surgeon, and physical well-being compared to the group that did not. The imaged group also had higher size, shape, and overall breast correlation scores, confidence in implant size selection scores, and communication with surgeon scores. The differences between the two groups were not statistically significant. Conclusions Three-dimensional imaging is a valuable tool in breast surgery. Although our study showed improvement in patient satisfaction and predicted outcome scores in the 3D imaged group, our results were not statistically significant. With the majority of patients reporting they would choose 3D imaging, it appears to instill confidence in patients regarding both surgeon and implant selection.

Hip Arthroplasty up to the Age of 30 and Considerations in Relation to Subsequent Revision

2009 ◽  
Vol 19 (3) ◽  
pp. 201-205 ◽  
Author(s):  
Jacques Tabutin ◽  
Pier M. Cambas
Keyword(s):  
Recurrent Dislocation ◽  
Developmental Dysplasia ◽  
Primary Arthroplasty ◽  
Implant Selection ◽  
Subsequent Revision ◽  
Acetabular Side ◽  
Secondary Procedures ◽  
Cup Arthroplasty ◽  
Hip Arthroplasties ◽  
Trauma Sequelae

We reviewed a series of 17 hip arthroplasties in 16 patients performed when the patients were 30 years old or younger who presented to us for consideration of revision. The mean age was 23.1 years (14 to 30) at the initial arthroplasty. At the time of the original procedure there were 4 sequelae of septic arthritis, 7 old traumatic hip injures, 3 cases of developmental dysplasia (DDH), 1 case of rheumatoid arthritis (RA), 1 steroid-induced avascular necrosis, and 1 old slipped upper femoral epiphysis (SUFE) The implants inculded 11 total hip arthroplasties (THA), 3 double cup arthroplasties, 1 bipolar arthroplasty,1 monopolar arthroplasty and 1 cup arthroplasty. The cause for revision lay on the acetabular side in 16 cases and on the femoral side in 6 cases (some had failure on both sides of the joint). There was one revision for recurrent dislocation. The patients had undergone a mean of 1.1 procedures (range 0–3) before the primary arthroplasty. There was a mean interval of 10.6 years (2–33) between the arthroplasty and the revision and the patients had a mean of 1.9 further revision procedures (0 to 4). Complications of revision surgery inculded 1 case of sepsis, 2 recurrent dislocations and 8 re-revisions. Postel and Merle d'Aubigne (PMA) score increased from 10.1 to 14.6 at an mean follow-up of 5.4 years (1 to 20). The typical patient was male (11/17) having had the first arthroplasty at age 23 for trauma sequelae (7/17), a revision at 34 (acetabular failure (16/17). At age 46.4, and after 1.9 secondary procedures hip scores were not exceptional. Such generally disappointing results arose from errors in implant selection or technical mistakes. Careful surgery is critical, and the way of life of the patient may need to be modified.

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