AimsSince long-term outcome of teres major tendon transfer surgery for irreparable posterosuperio... more AimsSince long-term outcome of teres major tendon transfer surgery for irreparable posterosuperior rotator cuff (RC) tears is largely unknown, the primary aim of this study was to evaluate the long-term outcome of the teres major transfer. We also aimed to report on the results of a cohort of patients with a similar indication for surgery that underwent a latissimus dorsi tendon transfer.Patients and MethodsIn this prospective cohort study, we reported on the long-term results of 20 consecutive patients with a teres major tendon transfer for irreparable massive posterosuperior RC tears. Additionally, we reported on the results of the latissimus dorsi tendon transfer (n = 19). The mean age was 60 years (47 to 77). Outcomes included the Constant score (CS), and pain at rest and during movement using the Visual Analogue Scale (VAS).ResultsAt a mean of ten years (8 to 12) following teres major transfer, the CS was still 23 points (95% confidence interval (CI) 14.6 to 30.9, p < 0.001)...
Objectives Knowledge on the epidemiology and long-term course of rotator cuff calcific tendinitis... more Objectives Knowledge on the epidemiology and long-term course of rotator cuff calcific tendinitis (RCCT) is scarce. We assessed demographics, radiological characteristics, and their association with long-term outcomes in a large patient group. Methods Baseline demographics, radiological characteristics and treatment were recorded in 342 patients. Interobserver agreement of radiological measures was analyzed. Long-*
Patients with a rotator cuff (RC) tear often exhibit scapular dyskinesia with increased scapular ... more Patients with a rotator cuff (RC) tear often exhibit scapular dyskinesia with increased scapular lateral rotation and decreased glenohumeral elevation with arm abduction. We hypothesized that in patients with an RC tear, scapular lateral rotation, and thus glenohumeral elevation, will be restored to normal after RC repair. Shoulder kinematics were quantitatively analyzed in 26 patients with an electromagnetic tracking device (Flock of Birds) before and 1 year after RC repair in this observational case series. We focused on humeral range of motion and scapular kinematics during abduction. The asymptomatic contralateral shoulder was used as the control. Changes in scapular kinematics were associated with the gain in range of motion. Shoulder kinematics were analyzed using a linear mixed model. Mean arm abduction and forward flexion improved after surgery by 20° (95% confidence interval [CI], 2.7°-36.5°; P = .025) and 13° (95% CI, 1.2°-36.5°; P = .044), respectively. Kinematic analyses showed decreases in mean scapular protraction (ie, internal rotation) and lateral rotation (ie, upward rotation) during abduction by 3° (95% CI, 0.0°-5.2°; P = .046) and 4° (95% CI, 1.6°-8.4°; P = .042), respectively. Glenohumeral elevation increased by 5° (95% CI, 0.6°-9.7°; P = .028) at 80°. Humeral range of motion increased when scapular lateral rotation decreased and posterior tilt increased. Scapular kinematics normalize after RC repair toward a symmetrical scapular motion pattern as observed in the asymptomatic contralateral shoulder. The observed changes in scapular kinematics are associated with an increased overall range of motion and suggest restored function of shoulder muscles.
Shoulder complaints are common in the elderly and hamper daily functioning. These complaints are ... more Shoulder complaints are common in the elderly and hamper daily functioning. These complaints are often caused by tears in the muscle-tendon units of the rotator cuff (RC). The four RC muscles stabilize the shoulder joint. While some RC muscles are frequently torn in shoulder complaints others remain intact. The pathological changes in RC muscles are poorly understood. We investigated changes in RC muscle pathology combining radiological and histological procedures. We measured cross sectional area (CSA) and fatty infiltration from Magnetic Resonance Imaging with Arthrography (MRA) in subjects without (N = 294) and with (N = 109) RC-tears. Normalized muscle CSA of the four RC muscles and the deltoid shoulder muscle were compared and age-associated patterns of muscle atrophy and fatty infiltration were constructed. We identified two distinct age-associated patterns: in the supraspinatus and subscapularis RC muscles CSAs continuously declined throughout adulthood, whereas in the infraspinatus and deltoid reduced CSA was prominent from midlife onwards. In the teres minor, CSA was unchanged with age. Most importantly, age-associated patterns were highly similar between subjects without RC tear and those with RC-tears. This suggests that extensive RC muscle atrophy during aging could contribute to RC pathology. We compared muscle pathology between torn infraspinatus and non-torn teres minor and the deltoid in two patients with a massive RC-tear. In the torn infraspinatus we found pronounced fatty droplets, an increase in extracellular collagen-1, a loss of myosin heavy chain-1 expression in myofibers and an increase in Pax7-positive cells. However, the adjacent intact teres minor and deltoid exhibited healthy muscle features. This suggests that satellite cells and the extracellular matrix may contribute to extensive muscle fibrosis in torn RC. We suggest that torn RC muscles display hallmarks of muscle aging whereas the teres minor could represent an aging-resilient muscle.
Chronic pain is frequently reported after total hip and knee arthroplasties (THA/TKA) in osteoart... more Chronic pain is frequently reported after total hip and knee arthroplasties (THA/TKA) in osteoarthritis (OA) patients. We investigated if severity of acute postoperative pain following THA/TKA in OA patients was associated with pain during the first postoperative year. From an observational study, OA patients scheduled for primary THA/TKA (June 2012–December 2017) were included from two hospitals in the Netherlands. Acute postoperative pain scores were collected within 72 h postoperatively and categorized as no/mild (NRS ≤ 4) or moderate/severe (NRS > 4). Pain was assessed preoperatively, 3, 6 and 12 months postoperatively using the HOOS/KOOS subscale pain. With Multilevel Mixed-effects-analyses, we estimated associations between acute and chronic pain until one year postoperative, adjusted for confounders and including an interaction term (Time*Acute pain). 193 THA and 196 TKA patients were included, 29% of THA and 51% of TKA patients reported moderate/severe pain acutely after ...
National and international evidence-based guidelines for hip and knee osteoarthritis (OA) recomme... more National and international evidence-based guidelines for hip and knee osteoarthritis (OA) recommend to start with non-surgical treatments, followed by surgical intervention if a patient does not respond sufficiently to non-surgical treatments, but there are indications that these are not optimally used. The aim of this study was to assess the extent to which all recommended non-surgical treatments were used by patients with hip or knee OA who receive(d) a total hip or knee replacement, as reported by patients and orthopaedic surgeons. Setting: We performed two cross-sectional internetbased surveys among patients and orthopaedic surgeons throughout the Netherlands. Participants: 195 OA patients either have undergone total knee arthroplasty or total hip arthroplasty no longer than 12 months ago or being on the waiting list for surgery with a confirmed date within 3 months and 482 orthopaedic surgeons were invited to participate. Primary and secondary outcome measures: The use of recommended non-surgical treatments including education about OA/treatment options, lifestyle advice, dietary therapy, physical therapy, acetaminophen, NSAIDs and glucocorticoid injections. Results: 174 OA patients (93%) and 172 orthopaedic surgeons (36%) completed the surveys. Most recommended non-surgical treatments were given to the majority of patients (eg, 80% education about OA, 73% physical therapy, 72% acetaminophen, 80% NSAIDs). However, only 6% of patients and 10% of orthopaedic surgeons reported using a combination of all recommended treatments. Dietary therapy was used least frequently. Only 11% of overweight and 30% of obese participants reported having received dietary therapy and 28% of orthopaedic surgeons reported to prescribe dietary therapy to overweight patients. Conclusions: While most recommended non-surgical treatments were used frequently as single therapy, the combination is used in only a small percentage of OA patients. Especially, use of dietary therapy may be improved to help patients manage their symptoms, and potentially delay the need for joint arthroplasty.
The effect of prophylaxis on the prevention of symptomatic venous thrombosis in patients with low... more The effect of prophylaxis on the prevention of symptomatic venous thrombosis in patients with lower leg cast immobilisation or after knee arthroscopy is not clear. Our aim was to assess the current practice of thrombosis prophylaxis in Dutch hospitals and to determine considerations for prescribing prophylaxis. Electronic questionnaires regarding thrombosis prophylaxis in patients with lower leg cast immobilisation or after knee arthroscopy were sent to all orthopaedic (90) and trauma surgery departments (89) and orthopaedic clinics (16) in the Netherlands. Response rate was 88% for orthopaedic surgery departments/clinics and 81% for trauma surgery departments. Analysis of the questionnaires reveals that prophylaxis was not provided for patients with lower leg cast immobilisation at only 3 (4%) orthopaedic and 3 (4%) trauma surgery departments, while 10 (11%) orthopaedic surgery departments did not provide prophylaxis for patients undergoing knee arthroscopies. Substantial differenc...
In the Dutch Arthroplasty Register (LROI), the product and batch number of prosthetic components ... more In the Dutch Arthroplasty Register (LROI), the product and batch number of prosthetic components and cement are registered for traceability. Registration of the product number provides opportunities to extend the information about a specific prosthesis. All product numbers used from the beginning of the registration in 2007 were characterized to develop and maintain an implant library. The Scientific Advisory Board developed a core-set that contains the most important characteristics needed to form an implant library. The final core-set contains the brand name, type, coating and material of the prosthesis. In total, 35 676 product numbers were classified, resulting in a complete implant library of all product numbers used in the LROI. To improve quality of the data and increase convenience of registration, the LROI implemented barcode scanning for data entry into the database. In 2017, 82% of prosthetic components and cement stickers had a GS1 barcode. The remaining product stickers...
It is unclear whether cemented or uncemented hemiarthroplasty is the best treatment option in eld... more It is unclear whether cemented or uncemented hemiarthroplasty is the best treatment option in elderly patients with displaced femoral neck fractures. Previous randomized trials comparing cemented and uncemented hemiarthroplasty have conflicting results. We conducted a randomized controlled trial to compare cemented and uncemented hemiarthroplasty. This multicenter parallel-randomized controlled trial included patients of 70 years and older with a displaced femoral neck fracture (Garden type III or IV). Inclusion was between August 2008 and June 2012. Patients were randomized between a cemented hemiarthroplasty, type Müller Straight Stem or an uncemented hemiarthroplasty, type DB-10. Primary outcomes were complications, operation time, functional outcome (measured by Timed-Up-and-Go (TUG) and Groningen Activity Restriction Scale (GARS)) and mid-thigh pain. Health Related Quality of Life (HRQoL, expressed with the SF-12) was measured as an secondary outcome. Follow up was 1 year. In t...
After publication of this article [1] it came to our attention that the author Wim E. Tuinebreije... more After publication of this article [1] it came to our attention that the author Wim E. Tuinebreijer was incorrectly included as Wim E. Tuinebreier. The correct spelling of this author name is included in this erratum and updated in the original article.
The results of primary total knee arthroplasty in patients with a follow-up of 4-10 years are pre... more The results of primary total knee arthroplasty in patients with a follow-up of 4-10 years are presented. The study population consisted of osteoarthritis as well as rheumatoid arthritis patients. Both groups were analyzed separately for postoperative pain reduction at rest and during activity, as well as for improvement of some daily activities (walking distance, stair climbing). Pain reduction at rest and during activity was maintained during the follow-up period of 4-10 years. The walking distance and the ability to climb stairs improved during the first few postoperative years, but declined in the later postoperative years. Survival curve analysis of the total knee arthroplasty showed good results for osteoarthritis as well as rheumatoid arthritis (estimated probability of survival of the prosthesis at 10 years&#39; follow-up was 94%).
Journal of Pediatric Rehabilitation Medicine, 2015
This study aimed to translate and cross-culturally adapt the Pediatric Outcome Data Collecting In... more This study aimed to translate and cross-culturally adapt the Pediatric Outcome Data Collecting Instrument (PODCI) into the Dutch language and evaluate its measurement properties among children (age 3-10) with Neonatal Brachial Plexus Palsy (NBPP). The PODCI was translated and adapted according to international guidelines and administered to 10 children with NBPP before and after surgery and thereafter twice again. Subsequently, the Mallet-score, Assisting Hand Assessment and active Range of Motion (aROM) were recorded. Cronbach&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s-α and correlations between the PODCI and other outcome measures were determined, as well as Intraclass Correlation Coefficients (ICC). In addition, effect sizes (ES), Standard Response Means (SRM) and change scores with the 95% Confidence Interval (95% CI) were calculated. The final Dutch PODCI `Upper Extremity and Physical Function&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; subscale and total score `Global Functioning&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; showed good internal consistency (Cronbach&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s-α 0.695/0.781) and reliability (ICC 0.97/0.80) and were significantly associated with aROM and the Mallet-score. After surgery a significant change of the total score (ES 0.57, SRM 1.23, change 4.22 points, 95% CI 1.04-7.4) was seen. The final Dutch PODCI had good measurement properties and appears useful in evaluating quality of life and functioning in children with NBPP.
A prospective, randomized, double-blind study was performed to evaluate three different means of ... more A prospective, randomized, double-blind study was performed to evaluate three different means of fixing tibial components during total knee arthroplasty. Eleven components fixed with cement, ten hydroxyapatite-coated components fixed without cement, and ten noncoated components fixed without cement were studied. A posterior cruciate ligament-retaining total condylar implant was used. Micromotion of the components was assessed with roentgen stereophotogrammetric analysis during the two-year follow-up period. There were no significant differences among the patients with regard to age (mean [and standard deviation], 68 +/- 11.6 years), body-mass index (mean, 23 +/- 2.8 kilograms per square meter), or stage of osteoarthrosis (mean, 4 +/- 2.4 according to the classification system of Ahlback and 5 +/- 0.6 according to that of Larsen et al.). The diagnosis was osteoarthrosis in five knees, and it was rheumatoid arthritis in twenty-six. The clinical scores were similar among the study grou...
International journal of computer assisted radiology and surgery, Jan 11, 2015
In orthopaedics, minimally invasive injection of bone cement is an established technique. We pres... more In orthopaedics, minimally invasive injection of bone cement is an established technique. We present HipRFX, a software tool for planning and guiding a cement injection procedure for stabilizing a loosening hip prosthesis. HipRFX works by analysing a pre-operative CT and intraoperative C-arm fluoroscopic images. HipRFX simulates the intraoperative fluoroscopic views that a surgeon would see on a display panel. Structures are rendered by modelling their X-ray attenuation. These are then compared to actual fluoroscopic images which allow cement volumes to be estimated. Five human cadaver legs were used to validate the software in conjunction with real percutaneous cement injection into artificially created periprothetic lesions. Based on intraoperatively obtained fluoroscopic images, our software was able to estimate the cement volume that reached the pre-operatively planned targets. The actual median target lesion volume was 3.58 ml (range 3.17-4.64 ml). The median error in computed ...
AimsSince long-term outcome of teres major tendon transfer surgery for irreparable posterosuperio... more AimsSince long-term outcome of teres major tendon transfer surgery for irreparable posterosuperior rotator cuff (RC) tears is largely unknown, the primary aim of this study was to evaluate the long-term outcome of the teres major transfer. We also aimed to report on the results of a cohort of patients with a similar indication for surgery that underwent a latissimus dorsi tendon transfer.Patients and MethodsIn this prospective cohort study, we reported on the long-term results of 20 consecutive patients with a teres major tendon transfer for irreparable massive posterosuperior RC tears. Additionally, we reported on the results of the latissimus dorsi tendon transfer (n = 19). The mean age was 60 years (47 to 77). Outcomes included the Constant score (CS), and pain at rest and during movement using the Visual Analogue Scale (VAS).ResultsAt a mean of ten years (8 to 12) following teres major transfer, the CS was still 23 points (95% confidence interval (CI) 14.6 to 30.9, p < 0.001)...
Objectives Knowledge on the epidemiology and long-term course of rotator cuff calcific tendinitis... more Objectives Knowledge on the epidemiology and long-term course of rotator cuff calcific tendinitis (RCCT) is scarce. We assessed demographics, radiological characteristics, and their association with long-term outcomes in a large patient group. Methods Baseline demographics, radiological characteristics and treatment were recorded in 342 patients. Interobserver agreement of radiological measures was analyzed. Long-*
Patients with a rotator cuff (RC) tear often exhibit scapular dyskinesia with increased scapular ... more Patients with a rotator cuff (RC) tear often exhibit scapular dyskinesia with increased scapular lateral rotation and decreased glenohumeral elevation with arm abduction. We hypothesized that in patients with an RC tear, scapular lateral rotation, and thus glenohumeral elevation, will be restored to normal after RC repair. Shoulder kinematics were quantitatively analyzed in 26 patients with an electromagnetic tracking device (Flock of Birds) before and 1 year after RC repair in this observational case series. We focused on humeral range of motion and scapular kinematics during abduction. The asymptomatic contralateral shoulder was used as the control. Changes in scapular kinematics were associated with the gain in range of motion. Shoulder kinematics were analyzed using a linear mixed model. Mean arm abduction and forward flexion improved after surgery by 20° (95% confidence interval [CI], 2.7°-36.5°; P = .025) and 13° (95% CI, 1.2°-36.5°; P = .044), respectively. Kinematic analyses showed decreases in mean scapular protraction (ie, internal rotation) and lateral rotation (ie, upward rotation) during abduction by 3° (95% CI, 0.0°-5.2°; P = .046) and 4° (95% CI, 1.6°-8.4°; P = .042), respectively. Glenohumeral elevation increased by 5° (95% CI, 0.6°-9.7°; P = .028) at 80°. Humeral range of motion increased when scapular lateral rotation decreased and posterior tilt increased. Scapular kinematics normalize after RC repair toward a symmetrical scapular motion pattern as observed in the asymptomatic contralateral shoulder. The observed changes in scapular kinematics are associated with an increased overall range of motion and suggest restored function of shoulder muscles.
Shoulder complaints are common in the elderly and hamper daily functioning. These complaints are ... more Shoulder complaints are common in the elderly and hamper daily functioning. These complaints are often caused by tears in the muscle-tendon units of the rotator cuff (RC). The four RC muscles stabilize the shoulder joint. While some RC muscles are frequently torn in shoulder complaints others remain intact. The pathological changes in RC muscles are poorly understood. We investigated changes in RC muscle pathology combining radiological and histological procedures. We measured cross sectional area (CSA) and fatty infiltration from Magnetic Resonance Imaging with Arthrography (MRA) in subjects without (N = 294) and with (N = 109) RC-tears. Normalized muscle CSA of the four RC muscles and the deltoid shoulder muscle were compared and age-associated patterns of muscle atrophy and fatty infiltration were constructed. We identified two distinct age-associated patterns: in the supraspinatus and subscapularis RC muscles CSAs continuously declined throughout adulthood, whereas in the infraspinatus and deltoid reduced CSA was prominent from midlife onwards. In the teres minor, CSA was unchanged with age. Most importantly, age-associated patterns were highly similar between subjects without RC tear and those with RC-tears. This suggests that extensive RC muscle atrophy during aging could contribute to RC pathology. We compared muscle pathology between torn infraspinatus and non-torn teres minor and the deltoid in two patients with a massive RC-tear. In the torn infraspinatus we found pronounced fatty droplets, an increase in extracellular collagen-1, a loss of myosin heavy chain-1 expression in myofibers and an increase in Pax7-positive cells. However, the adjacent intact teres minor and deltoid exhibited healthy muscle features. This suggests that satellite cells and the extracellular matrix may contribute to extensive muscle fibrosis in torn RC. We suggest that torn RC muscles display hallmarks of muscle aging whereas the teres minor could represent an aging-resilient muscle.
Chronic pain is frequently reported after total hip and knee arthroplasties (THA/TKA) in osteoart... more Chronic pain is frequently reported after total hip and knee arthroplasties (THA/TKA) in osteoarthritis (OA) patients. We investigated if severity of acute postoperative pain following THA/TKA in OA patients was associated with pain during the first postoperative year. From an observational study, OA patients scheduled for primary THA/TKA (June 2012–December 2017) were included from two hospitals in the Netherlands. Acute postoperative pain scores were collected within 72 h postoperatively and categorized as no/mild (NRS ≤ 4) or moderate/severe (NRS > 4). Pain was assessed preoperatively, 3, 6 and 12 months postoperatively using the HOOS/KOOS subscale pain. With Multilevel Mixed-effects-analyses, we estimated associations between acute and chronic pain until one year postoperative, adjusted for confounders and including an interaction term (Time*Acute pain). 193 THA and 196 TKA patients were included, 29% of THA and 51% of TKA patients reported moderate/severe pain acutely after ...
National and international evidence-based guidelines for hip and knee osteoarthritis (OA) recomme... more National and international evidence-based guidelines for hip and knee osteoarthritis (OA) recommend to start with non-surgical treatments, followed by surgical intervention if a patient does not respond sufficiently to non-surgical treatments, but there are indications that these are not optimally used. The aim of this study was to assess the extent to which all recommended non-surgical treatments were used by patients with hip or knee OA who receive(d) a total hip or knee replacement, as reported by patients and orthopaedic surgeons. Setting: We performed two cross-sectional internetbased surveys among patients and orthopaedic surgeons throughout the Netherlands. Participants: 195 OA patients either have undergone total knee arthroplasty or total hip arthroplasty no longer than 12 months ago or being on the waiting list for surgery with a confirmed date within 3 months and 482 orthopaedic surgeons were invited to participate. Primary and secondary outcome measures: The use of recommended non-surgical treatments including education about OA/treatment options, lifestyle advice, dietary therapy, physical therapy, acetaminophen, NSAIDs and glucocorticoid injections. Results: 174 OA patients (93%) and 172 orthopaedic surgeons (36%) completed the surveys. Most recommended non-surgical treatments were given to the majority of patients (eg, 80% education about OA, 73% physical therapy, 72% acetaminophen, 80% NSAIDs). However, only 6% of patients and 10% of orthopaedic surgeons reported using a combination of all recommended treatments. Dietary therapy was used least frequently. Only 11% of overweight and 30% of obese participants reported having received dietary therapy and 28% of orthopaedic surgeons reported to prescribe dietary therapy to overweight patients. Conclusions: While most recommended non-surgical treatments were used frequently as single therapy, the combination is used in only a small percentage of OA patients. Especially, use of dietary therapy may be improved to help patients manage their symptoms, and potentially delay the need for joint arthroplasty.
The effect of prophylaxis on the prevention of symptomatic venous thrombosis in patients with low... more The effect of prophylaxis on the prevention of symptomatic venous thrombosis in patients with lower leg cast immobilisation or after knee arthroscopy is not clear. Our aim was to assess the current practice of thrombosis prophylaxis in Dutch hospitals and to determine considerations for prescribing prophylaxis. Electronic questionnaires regarding thrombosis prophylaxis in patients with lower leg cast immobilisation or after knee arthroscopy were sent to all orthopaedic (90) and trauma surgery departments (89) and orthopaedic clinics (16) in the Netherlands. Response rate was 88% for orthopaedic surgery departments/clinics and 81% for trauma surgery departments. Analysis of the questionnaires reveals that prophylaxis was not provided for patients with lower leg cast immobilisation at only 3 (4%) orthopaedic and 3 (4%) trauma surgery departments, while 10 (11%) orthopaedic surgery departments did not provide prophylaxis for patients undergoing knee arthroscopies. Substantial differenc...
In the Dutch Arthroplasty Register (LROI), the product and batch number of prosthetic components ... more In the Dutch Arthroplasty Register (LROI), the product and batch number of prosthetic components and cement are registered for traceability. Registration of the product number provides opportunities to extend the information about a specific prosthesis. All product numbers used from the beginning of the registration in 2007 were characterized to develop and maintain an implant library. The Scientific Advisory Board developed a core-set that contains the most important characteristics needed to form an implant library. The final core-set contains the brand name, type, coating and material of the prosthesis. In total, 35 676 product numbers were classified, resulting in a complete implant library of all product numbers used in the LROI. To improve quality of the data and increase convenience of registration, the LROI implemented barcode scanning for data entry into the database. In 2017, 82% of prosthetic components and cement stickers had a GS1 barcode. The remaining product stickers...
It is unclear whether cemented or uncemented hemiarthroplasty is the best treatment option in eld... more It is unclear whether cemented or uncemented hemiarthroplasty is the best treatment option in elderly patients with displaced femoral neck fractures. Previous randomized trials comparing cemented and uncemented hemiarthroplasty have conflicting results. We conducted a randomized controlled trial to compare cemented and uncemented hemiarthroplasty. This multicenter parallel-randomized controlled trial included patients of 70 years and older with a displaced femoral neck fracture (Garden type III or IV). Inclusion was between August 2008 and June 2012. Patients were randomized between a cemented hemiarthroplasty, type Müller Straight Stem or an uncemented hemiarthroplasty, type DB-10. Primary outcomes were complications, operation time, functional outcome (measured by Timed-Up-and-Go (TUG) and Groningen Activity Restriction Scale (GARS)) and mid-thigh pain. Health Related Quality of Life (HRQoL, expressed with the SF-12) was measured as an secondary outcome. Follow up was 1 year. In t...
After publication of this article [1] it came to our attention that the author Wim E. Tuinebreije... more After publication of this article [1] it came to our attention that the author Wim E. Tuinebreijer was incorrectly included as Wim E. Tuinebreier. The correct spelling of this author name is included in this erratum and updated in the original article.
The results of primary total knee arthroplasty in patients with a follow-up of 4-10 years are pre... more The results of primary total knee arthroplasty in patients with a follow-up of 4-10 years are presented. The study population consisted of osteoarthritis as well as rheumatoid arthritis patients. Both groups were analyzed separately for postoperative pain reduction at rest and during activity, as well as for improvement of some daily activities (walking distance, stair climbing). Pain reduction at rest and during activity was maintained during the follow-up period of 4-10 years. The walking distance and the ability to climb stairs improved during the first few postoperative years, but declined in the later postoperative years. Survival curve analysis of the total knee arthroplasty showed good results for osteoarthritis as well as rheumatoid arthritis (estimated probability of survival of the prosthesis at 10 years&#39; follow-up was 94%).
Journal of Pediatric Rehabilitation Medicine, 2015
This study aimed to translate and cross-culturally adapt the Pediatric Outcome Data Collecting In... more This study aimed to translate and cross-culturally adapt the Pediatric Outcome Data Collecting Instrument (PODCI) into the Dutch language and evaluate its measurement properties among children (age 3-10) with Neonatal Brachial Plexus Palsy (NBPP). The PODCI was translated and adapted according to international guidelines and administered to 10 children with NBPP before and after surgery and thereafter twice again. Subsequently, the Mallet-score, Assisting Hand Assessment and active Range of Motion (aROM) were recorded. Cronbach&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s-α and correlations between the PODCI and other outcome measures were determined, as well as Intraclass Correlation Coefficients (ICC). In addition, effect sizes (ES), Standard Response Means (SRM) and change scores with the 95% Confidence Interval (95% CI) were calculated. The final Dutch PODCI `Upper Extremity and Physical Function&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; subscale and total score `Global Functioning&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39; showed good internal consistency (Cronbach&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s-α 0.695/0.781) and reliability (ICC 0.97/0.80) and were significantly associated with aROM and the Mallet-score. After surgery a significant change of the total score (ES 0.57, SRM 1.23, change 4.22 points, 95% CI 1.04-7.4) was seen. The final Dutch PODCI had good measurement properties and appears useful in evaluating quality of life and functioning in children with NBPP.
A prospective, randomized, double-blind study was performed to evaluate three different means of ... more A prospective, randomized, double-blind study was performed to evaluate three different means of fixing tibial components during total knee arthroplasty. Eleven components fixed with cement, ten hydroxyapatite-coated components fixed without cement, and ten noncoated components fixed without cement were studied. A posterior cruciate ligament-retaining total condylar implant was used. Micromotion of the components was assessed with roentgen stereophotogrammetric analysis during the two-year follow-up period. There were no significant differences among the patients with regard to age (mean [and standard deviation], 68 +/- 11.6 years), body-mass index (mean, 23 +/- 2.8 kilograms per square meter), or stage of osteoarthrosis (mean, 4 +/- 2.4 according to the classification system of Ahlback and 5 +/- 0.6 according to that of Larsen et al.). The diagnosis was osteoarthrosis in five knees, and it was rheumatoid arthritis in twenty-six. The clinical scores were similar among the study grou...
International journal of computer assisted radiology and surgery, Jan 11, 2015
In orthopaedics, minimally invasive injection of bone cement is an established technique. We pres... more In orthopaedics, minimally invasive injection of bone cement is an established technique. We present HipRFX, a software tool for planning and guiding a cement injection procedure for stabilizing a loosening hip prosthesis. HipRFX works by analysing a pre-operative CT and intraoperative C-arm fluoroscopic images. HipRFX simulates the intraoperative fluoroscopic views that a surgeon would see on a display panel. Structures are rendered by modelling their X-ray attenuation. These are then compared to actual fluoroscopic images which allow cement volumes to be estimated. Five human cadaver legs were used to validate the software in conjunction with real percutaneous cement injection into artificially created periprothetic lesions. Based on intraoperatively obtained fluoroscopic images, our software was able to estimate the cement volume that reached the pre-operatively planned targets. The actual median target lesion volume was 3.58 ml (range 3.17-4.64 ml). The median error in computed ...
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Papers by Rob Nelissen