Bart Burger - Academia.edu (original) (raw)

Papers by Bart Burger

Research paper thumbnail of Does Insert Type Affect Clinical and Functional Outcome in Total Knee Arthroplasty? A Randomised Controlled Clinical Trial With 5-Year Follow-Up

The Journal of Arthroplasty, 2015

Research paper thumbnail of Factors associated with reduced early survival in the Oxford phase III medial unicompartment knee replacement

The Knee, 2010

The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoa... more The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoarthritis, BMI and age for implant survival of unicompartmental knee arthroplasty (UKA) performed in patients meeting strict admission criteria. The data and radiographs of 437 unilateral Oxford phase III procedures (Biomet, Bridgend, UK) were analysed. All procedures were carried out or supervised by 13 specialised knee surgeons in three different hospitals. The study group comprised 437 patients with a median follow of 2.6 years (0.1-7.9). The cumulative standard case survival rate at 5 years, when there were still 101 patients at risk, was 84.7% (CI-95%: 80.1-89.3%). Young age (b 60 years) was associated with a 2.2-fold increased adjusted risk of revision (CI: 1.08-4.43; p = 0.03). The preoperative presence of radiological features of patellofemoral osteoarthritis was associated with a 0.3-fold reduced adjusted risk of revision (CI: 0.11-0.89; p = 0.03). BMI N 30 kg/m 2 , gender, the surgeon performing the operation (either as an individual or categorised by annual surgical UKA caseload, i.e., more or less than 10 UKAs) and the hospital in which surgery took place did not predict implant survival of UKA. We conclude that young patients (b 60 years) experience an increased early risk of revision for UKA when compared to older patients (N 60 years). Obesity (BMI N 30 kg/m 2 ) and preoperative patellofemoral osteoarthritis are not associated with a decreased implant survival and therefore should not be considered risk factors in this context.

Research paper thumbnail of Kinematic and clinical evaluation of shoulder function after primary and revision reverse shoulder prostheses

Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.]

Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active rang... more Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active range of motion (ROM) is often not optimal, especially after revision. A kinematic and clinical analysis of the reverse prosthesis was performed to provide more precise information on its glenohumeral motion pattern. We hypothesized that the difference in the primary and revision cases is due to differences in the motion in the glenohumeral joint. The motion pattern of 31 patients with a reverse prosthesis (35 shoulders, 19 primary and 16 revisions) was measured during 3 active ROM tasks-forward flexion, abduction, and axial rotation. Average age was 71 ± 8 years (range, 58-85 years). Average follow-up was 23 ± 14 months (range, 4-63 months). Kinematic measurements were performed with a 3-dimensional electromagnetic tracking device. Clinical evaluation was performed by obtaining Constant score, Disabilities of Arm, Shoulder and Hand (DASH) score, and the Simple Shoulder Test (SST). Acromial-...

Research paper thumbnail of The effect of experimental shortening of the clavicle on shoulder kinematics

Clinical biomechanics (Bristol, Avon)

Malunion after mid shaft clavicle fractures has recently been recognized as a cause of pain and d... more Malunion after mid shaft clavicle fractures has recently been recognized as a cause of pain and dysfunction of the shoulder. The mechanism that causes these complaints is however yet unclear. In this study we describe the kinematic changes that occur in the shoulder girdle due to clavicle shortening. An experimental cadaveric study was performed on five shoulders of three fresh frozen specimens. The specimens were fixed in an upright position that allowed free motion of the shoulder girdle. We measured position of the bony structures with an opto-electronic system (Northern Digital Inc., Waterloo, Ontario Canada) in rest and during in a series of motions. Measurements were done with a normal clavicle and after shortening of the clavicle by 1.2, 2.4 and 3.6 cm. The shoulders were moved manually by one of the researchers. We examined for changes in resting position and during movement that resulted from the experimental shortening of the clavicle. In the resting position, winging of t...

Research paper thumbnail of Factors associated with reduced early survival in the Oxford phase III medial unicompartment knee replacement

The Knee

The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoa... more The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoarthritis, BMI and age for implant survival of unicompartmental knee arthroplasty (UKA) performed in patients meeting strict admission criteria. The data and radiographs of 437 unilateral Oxford phase III procedures (Biomet, Bridgend, UK) were analysed. All procedures were carried out or supervised by 13 specialised knee surgeons in three different hospitals. The study group comprised 437 patients with a median follow of 2.6 years (0.1-7.9). The cumulative standard case survival rate at 5 years, when there were still 101 patients at risk, was 84.7% (CI-95%: 80.1-89.3%). Young age (<60 years) was associated with a 2.2-fold increased adjusted risk of revision (CI: 1.08-4.43; p=0.03). The preoperative presence of radiological features of patellofemoral osteoarthritis was associated with a 0.3-fold reduced adjusted risk of revision (CI: 0.11-0.89; p=0.03). BMI>30 kg/m(2), gender, the su...

Research paper thumbnail of Does Insert Type Affect Clinical and Functional Outcome in Total Knee Arthroplasty? A Randomised Controlled Clinical Trial With 5-Year Follow-Up

The Journal of Arthroplasty, 2015

New insert types have been developed to improve clinical and functional outcome in mobile bearing... more New insert types have been developed to improve clinical and functional outcome in mobile bearing (MB-TKA) and fixed bearing total knee arthroplasty (FB-TKA). A prospective single blinded randomised controlled clinical trial was performed to evaluate 2 types of MB-TKA inserts and 2 types of FB-TKA inserts of the Genesis II prosthesis (Smith &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; Nephew) in 146 patients with 5-years follow-up. A significant difference (P=.042) between the MB-TKA inserts was found in KSS function scores, but clinical significance is expected to be limited. Goniometry, temporal gait parameters and QoL were similar in all groups. Survival was significantly better (P=.047) for FB-TKA. The comparable outcome and higher revision rate in MB-TKA indicate that FB-TKA may be preferential for the Genesis II implant system.

Research paper thumbnail of Operative resection is a viable treatment of macrodactyly of the foot caused by lipofibromatous hamartoma: A case study with 5 year follow-up

Foot and Ankle Surgery, 2014

Please cite this article as: Fransen BL, Broeders MGJ, Oosterom FJT, Gilhuijs NDB, Burger BJ, Ope... more Please cite this article as: Fransen BL, Broeders MGJ, Oosterom FJT, Gilhuijs NDB, Burger BJ, Operative resection is a viable treatment of macrodactyly of the foot caused by lipofibromatous hamartoma; A case study with 5 year follow-up, Foot and Ankle Surgery (2014), http://dx.A c c e p t e d M a n u s c r i p t Highlights  Only a few cases of lipofibromatous hamartoma of the foot have been described  We argue that operative treatment is a viable option in symptomatic LFH of the foot  A (partial) metatarsal resection is preferred over marginal resections

Research paper thumbnail of Factors associated with reduced early survival in the Oxford phase III medial unicompartment knee replacement

The Knee, 2010

The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoa... more The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoarthritis, BMI and age for implant survival of unicompartmental knee arthroplasty (UKA) performed in patients meeting strict admission criteria. The data and radiographs of 437 unilateral Oxford phase III procedures (Biomet, Bridgend, UK) were analysed. All procedures were carried out or supervised by 13 specialised knee surgeons in three different hospitals. The study group comprised 437 patients with a median follow of 2.6 years (0.1-7.9). The cumulative standard case survival rate at 5 years, when there were still 101 patients at risk, was 84.7% (CI-95%: 80.1-89.3%). Young age (b 60 years) was associated with a 2.2-fold increased adjusted risk of revision (CI: 1.08-4.43; p = 0.03). The preoperative presence of radiological features of patellofemoral osteoarthritis was associated with a 0.3-fold reduced adjusted risk of revision (CI: 0.11-0.89; p = 0.03). BMI N 30 kg/m 2 , gender, the surgeon performing the operation (either as an individual or categorised by annual surgical UKA caseload, i.e., more or less than 10 UKAs) and the hospital in which surgery took place did not predict implant survival of UKA. We conclude that young patients (b 60 years) experience an increased early risk of revision for UKA when compared to older patients (N 60 years). Obesity (BMI N 30 kg/m 2 ) and preoperative patellofemoral osteoarthritis are not associated with a decreased implant survival and therefore should not be considered risk factors in this context.

Research paper thumbnail of Haloperidol Prophylaxis for Elderly Hip-Surgery Patients at Risk for Delirium: A Randomized Placebo-Controlled Study

Journal of the American Geriatrics Society, 2000

Research paper thumbnail of RESPONSE LETTERS TO DRS. WANG, AND SEITZ AND GILL

Journal of the American Geriatrics Society, 2000

4. Schneider LS, Dagerman KS, Insel P. Risk of death with atypical antipsychotic drug treatment f... more 4. Schneider LS, Dagerman KS, Insel P. Risk of death with atypical antipsychotic drug treatment for dementia: Meta-analysis of randomized placebo-controlled trials. JAMA 2005;294:1934-1943. 5. Inouye SK, Viscoli CM, Horwitz RI et al. A predictive model for delirium in hospitalized elderly medical patients based on admission characteristics. Ann

Research paper thumbnail of Kinematic and clinical evaluation of shoulder function after primary and revision reverse shoulder prostheses

Journal of Shoulder and Elbow Surgery, 2011

Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active rang... more Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active range of motion (ROM) is often not optimal, especially after revision. A kinematic and clinical analysis of the reverse prosthesis was performed to provide more precise information on its glenohumeral motion pattern. We hypothesized that the difference in the primary and revision cases is due to differences in the motion in the glenohumeral joint. The motion pattern of 31 patients with a reverse prosthesis (35 shoulders, 19 primary and 16 revisions) was measured during 3 active ROM tasks-forward flexion, abduction, and axial rotation. Average age was 71 ± 8 years (range, 58-85 years). Average follow-up was 23 ± 14 months (range, 4-63 months). Kinematic measurements were performed with a 3-dimensional electromagnetic tracking device. Clinical evaluation was performed by obtaining Constant score, Disabilities of Arm, Shoulder and Hand (DASH) score, and the Simple Shoulder Test (SST). Acromial-prosthetic distance was measured on anteroposterior radiographs. Primary placed prostheses showed significantly better active glenohumeral motion than revisions for forward flexion (71° ± 18° vs 53° ± 26°, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .05), abduction (64° ± 15° vs 46° ± 24°, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .05), and active external rotation (31° ± 25° vs 13° ± 16°, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .05). Constant score improved for the whole group from 24 (range, 5-47) to 50 (range, 8-87; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001), for the primary group from 28 (range, 13-47) to 60 (range, 8-87; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001) and for revisions from 20 (range, 5-47) to 38 (range, 11-73; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001). Acromial-prosthetic distance showed no significant correlation for active glenohumeral motion. Five shoulders with a deficient teres minor muscle showed no significant decrease of external rotation. Active ROM is better in primary placed prosthesis, and this difference takes place mainly in the glenohumeral joint. In all our patients, Constant scores improved significantly postoperatively. However, we could not find any clinical correlating parameters to explain this difference.

Research paper thumbnail of Total Ankle Replacement Outcome in Low Volume Centers: Short-Term Followup

Foot & Ankle International, 2010

The indication for total ankle replacement (TAR) as an alternative to ankle fusion continues to b... more The indication for total ankle replacement (TAR) as an alternative to ankle fusion continues to be a much-debated topic. The reported survival of TAR at midterm followup is approximately 90%. The aim of this study was to compare functional outcome and survival of TAR in low volume centers versus high volume centers. A retrospective cohort study was carried out in four low volume centers. Sixty-four Salto TARs were performed between 2003 and 2007 in 60 patients. Fifty-five (59 TAR) patients were eligible for followup with 28 men. Standardized American Orthopaedic Foot and Ankle Society (AOFAS) scores, patient satisfaction, and range of motion (ROM) were measured. Standardized and dynamic radiographs were used for evaluation of radiolucencies, ROM and component alignment. Seven of the 59 ankle prostheses had to be revised: five for loosening and two for deep infection. Three of the five revised for loosening went on to fusion, and in two a revision of one of the components was performed. Both infected ankles were fused. Five patients declined to participate this study, among these two were TAR failures. Survival with revision as the endpoint was 86% at final followup. The average AOFAS score was 75 (SD ± 15). On dynamic radiographs the ROM was 22 degrees (SD ± 8) in the tibiotalar joint. This study demonstrated that functional results of total ankle replacement in low volume centers were comparable to most high volume centers but survival was lower especially when we consider our shorter followup than most comparable series.

Research paper thumbnail of Prognosis of Limitations in Activities in Osteoarthritis of the Hip or Knee: A 3-Year Cohort Study

Archives of Physical Medicine and Rehabilitation, 2010

Research paper thumbnail of Use of Serotonergic Antidepressants and Bleeding Risk in Orthopedic Patients

Anesthesiology, 2010

Selective serotonin reuptake inhibitors have been associated with an increased bleeding tendency.... more Selective serotonin reuptake inhibitors have been associated with an increased bleeding tendency. Information on the impact of a possible impaired hemostasis associated with the perioperative use of selective serotonin reuptake inhibitors is limited. This study aimed to determine the association between the perioperative use of selective serotonin reuptake inhibitors and the amount of blood loss during surgery and perioperative transfusion requirements. The authors conducted a retrospective cohort study among patients who underwent elective primary total hip arthroplasty in two hospitals from the period of July 1, 2004 until July 1, 2008. The index group included all users of both serotonergic and nonserotonergic antidepressants. The reference group included a random sample (ratio 1:3) of nonusers. The primary outcome was the amount of intraoperative blood loss. The requirement for blood transfusion was a secondary outcome. The outcomes were adjusted for confounding factors (comorbidity and comedication) using regression techniques. The index group included 66 users of serotonergic and 29 users of nonserotonergic antidepressants, and the reference group included 285 patients. After adjustment for confounding factors, mean blood loss during surgery was significantly higher in the users of selective serotonin reuptake inhibitors when compared with the reference group: 95 ml (95% CI 9-181). Mean blood loss in the users of nonserotonergic antidepressants did not differ from the reference group. Users of antidepressants did not have a higher risk for transfusion. Patients undergoing total hip arthroplasty who continue the use of serotonergic antidepressants show a significantly higher, but clinically unimportant, intraoperative blood loss, without an increase in perioperative transfusion requirements.

Research paper thumbnail of Malunion after midshaft clavicle fractures in adults

Acta Orthopaedica, 2010

This is an overview of the current literature on malunion after midshaft clavicle fracture. Anato... more This is an overview of the current literature on malunion after midshaft clavicle fracture. Anatomy, trauma mechanism, classification, incidence, symptoms, prevention, and treatment options are all discussed. The conclusion is that clavicle malunion is a distinct clinical entity that can be treated successfully. 

Research paper thumbnail of Frejka pillow and Becker device for congenital dislocation of the hip: Prospective 6-year study of 104 late-diagnosed cases

Acta Orthopaedica, 1993

During the period 1974-1986, 107 consecutive 1-9 month-old children with late-diagnosed congenita... more During the period 1974-1986, 107 consecutive 1-9 month-old children with late-diagnosed congenital dislocation of the hip (CDH) were treated with a Frejka pillow primarily, followed by a Becker device. Treatment was initially successful in 96 cases with 2 not reduced, 4 failed stabilization, 4 persisting dysplasia, and 1 avascular necrosis. No correlation was found between age at the time of diagnosis or the severity of the dislocation and the duration or the result of treatment.

Research paper thumbnail of Does Insert Type Affect Clinical and Functional Outcome in Total Knee Arthroplasty? A Randomised Controlled Clinical Trial With 5-Year Follow-Up

The Journal of Arthroplasty, 2015

Research paper thumbnail of Factors associated with reduced early survival in the Oxford phase III medial unicompartment knee replacement

The Knee, 2010

The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoa... more The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoarthritis, BMI and age for implant survival of unicompartmental knee arthroplasty (UKA) performed in patients meeting strict admission criteria. The data and radiographs of 437 unilateral Oxford phase III procedures (Biomet, Bridgend, UK) were analysed. All procedures were carried out or supervised by 13 specialised knee surgeons in three different hospitals. The study group comprised 437 patients with a median follow of 2.6 years (0.1-7.9). The cumulative standard case survival rate at 5 years, when there were still 101 patients at risk, was 84.7% (CI-95%: 80.1-89.3%). Young age (b 60 years) was associated with a 2.2-fold increased adjusted risk of revision (CI: 1.08-4.43; p = 0.03). The preoperative presence of radiological features of patellofemoral osteoarthritis was associated with a 0.3-fold reduced adjusted risk of revision (CI: 0.11-0.89; p = 0.03). BMI N 30 kg/m 2 , gender, the surgeon performing the operation (either as an individual or categorised by annual surgical UKA caseload, i.e., more or less than 10 UKAs) and the hospital in which surgery took place did not predict implant survival of UKA. We conclude that young patients (b 60 years) experience an increased early risk of revision for UKA when compared to older patients (N 60 years). Obesity (BMI N 30 kg/m 2 ) and preoperative patellofemoral osteoarthritis are not associated with a decreased implant survival and therefore should not be considered risk factors in this context.

Research paper thumbnail of Kinematic and clinical evaluation of shoulder function after primary and revision reverse shoulder prostheses

Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.]

Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active rang... more Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active range of motion (ROM) is often not optimal, especially after revision. A kinematic and clinical analysis of the reverse prosthesis was performed to provide more precise information on its glenohumeral motion pattern. We hypothesized that the difference in the primary and revision cases is due to differences in the motion in the glenohumeral joint. The motion pattern of 31 patients with a reverse prosthesis (35 shoulders, 19 primary and 16 revisions) was measured during 3 active ROM tasks-forward flexion, abduction, and axial rotation. Average age was 71 ± 8 years (range, 58-85 years). Average follow-up was 23 ± 14 months (range, 4-63 months). Kinematic measurements were performed with a 3-dimensional electromagnetic tracking device. Clinical evaluation was performed by obtaining Constant score, Disabilities of Arm, Shoulder and Hand (DASH) score, and the Simple Shoulder Test (SST). Acromial-...

Research paper thumbnail of The effect of experimental shortening of the clavicle on shoulder kinematics

Clinical biomechanics (Bristol, Avon)

Malunion after mid shaft clavicle fractures has recently been recognized as a cause of pain and d... more Malunion after mid shaft clavicle fractures has recently been recognized as a cause of pain and dysfunction of the shoulder. The mechanism that causes these complaints is however yet unclear. In this study we describe the kinematic changes that occur in the shoulder girdle due to clavicle shortening. An experimental cadaveric study was performed on five shoulders of three fresh frozen specimens. The specimens were fixed in an upright position that allowed free motion of the shoulder girdle. We measured position of the bony structures with an opto-electronic system (Northern Digital Inc., Waterloo, Ontario Canada) in rest and during in a series of motions. Measurements were done with a normal clavicle and after shortening of the clavicle by 1.2, 2.4 and 3.6 cm. The shoulders were moved manually by one of the researchers. We examined for changes in resting position and during movement that resulted from the experimental shortening of the clavicle. In the resting position, winging of t...

Research paper thumbnail of Factors associated with reduced early survival in the Oxford phase III medial unicompartment knee replacement

The Knee

The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoa... more The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoarthritis, BMI and age for implant survival of unicompartmental knee arthroplasty (UKA) performed in patients meeting strict admission criteria. The data and radiographs of 437 unilateral Oxford phase III procedures (Biomet, Bridgend, UK) were analysed. All procedures were carried out or supervised by 13 specialised knee surgeons in three different hospitals. The study group comprised 437 patients with a median follow of 2.6 years (0.1-7.9). The cumulative standard case survival rate at 5 years, when there were still 101 patients at risk, was 84.7% (CI-95%: 80.1-89.3%). Young age (<60 years) was associated with a 2.2-fold increased adjusted risk of revision (CI: 1.08-4.43; p=0.03). The preoperative presence of radiological features of patellofemoral osteoarthritis was associated with a 0.3-fold reduced adjusted risk of revision (CI: 0.11-0.89; p=0.03). BMI>30 kg/m(2), gender, the su...

Research paper thumbnail of Does Insert Type Affect Clinical and Functional Outcome in Total Knee Arthroplasty? A Randomised Controlled Clinical Trial With 5-Year Follow-Up

The Journal of Arthroplasty, 2015

New insert types have been developed to improve clinical and functional outcome in mobile bearing... more New insert types have been developed to improve clinical and functional outcome in mobile bearing (MB-TKA) and fixed bearing total knee arthroplasty (FB-TKA). A prospective single blinded randomised controlled clinical trial was performed to evaluate 2 types of MB-TKA inserts and 2 types of FB-TKA inserts of the Genesis II prosthesis (Smith &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp; Nephew) in 146 patients with 5-years follow-up. A significant difference (P=.042) between the MB-TKA inserts was found in KSS function scores, but clinical significance is expected to be limited. Goniometry, temporal gait parameters and QoL were similar in all groups. Survival was significantly better (P=.047) for FB-TKA. The comparable outcome and higher revision rate in MB-TKA indicate that FB-TKA may be preferential for the Genesis II implant system.

Research paper thumbnail of Operative resection is a viable treatment of macrodactyly of the foot caused by lipofibromatous hamartoma: A case study with 5 year follow-up

Foot and Ankle Surgery, 2014

Please cite this article as: Fransen BL, Broeders MGJ, Oosterom FJT, Gilhuijs NDB, Burger BJ, Ope... more Please cite this article as: Fransen BL, Broeders MGJ, Oosterom FJT, Gilhuijs NDB, Burger BJ, Operative resection is a viable treatment of macrodactyly of the foot caused by lipofibromatous hamartoma; A case study with 5 year follow-up, Foot and Ankle Surgery (2014), http://dx.A c c e p t e d M a n u s c r i p t Highlights  Only a few cases of lipofibromatous hamartoma of the foot have been described  We argue that operative treatment is a viable option in symptomatic LFH of the foot  A (partial) metatarsal resection is preferred over marginal resections

Research paper thumbnail of Factors associated with reduced early survival in the Oxford phase III medial unicompartment knee replacement

The Knee, 2010

The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoa... more The aim of this study was to determine the prognostic value of preoperative patellofemoral osteoarthritis, BMI and age for implant survival of unicompartmental knee arthroplasty (UKA) performed in patients meeting strict admission criteria. The data and radiographs of 437 unilateral Oxford phase III procedures (Biomet, Bridgend, UK) were analysed. All procedures were carried out or supervised by 13 specialised knee surgeons in three different hospitals. The study group comprised 437 patients with a median follow of 2.6 years (0.1-7.9). The cumulative standard case survival rate at 5 years, when there were still 101 patients at risk, was 84.7% (CI-95%: 80.1-89.3%). Young age (b 60 years) was associated with a 2.2-fold increased adjusted risk of revision (CI: 1.08-4.43; p = 0.03). The preoperative presence of radiological features of patellofemoral osteoarthritis was associated with a 0.3-fold reduced adjusted risk of revision (CI: 0.11-0.89; p = 0.03). BMI N 30 kg/m 2 , gender, the surgeon performing the operation (either as an individual or categorised by annual surgical UKA caseload, i.e., more or less than 10 UKAs) and the hospital in which surgery took place did not predict implant survival of UKA. We conclude that young patients (b 60 years) experience an increased early risk of revision for UKA when compared to older patients (N 60 years). Obesity (BMI N 30 kg/m 2 ) and preoperative patellofemoral osteoarthritis are not associated with a decreased implant survival and therefore should not be considered risk factors in this context.

Research paper thumbnail of Haloperidol Prophylaxis for Elderly Hip-Surgery Patients at Risk for Delirium: A Randomized Placebo-Controlled Study

Journal of the American Geriatrics Society, 2000

Research paper thumbnail of RESPONSE LETTERS TO DRS. WANG, AND SEITZ AND GILL

Journal of the American Geriatrics Society, 2000

4. Schneider LS, Dagerman KS, Insel P. Risk of death with atypical antipsychotic drug treatment f... more 4. Schneider LS, Dagerman KS, Insel P. Risk of death with atypical antipsychotic drug treatment for dementia: Meta-analysis of randomized placebo-controlled trials. JAMA 2005;294:1934-1943. 5. Inouye SK, Viscoli CM, Horwitz RI et al. A predictive model for delirium in hospitalized elderly medical patients based on admission characteristics. Ann

Research paper thumbnail of Kinematic and clinical evaluation of shoulder function after primary and revision reverse shoulder prostheses

Journal of Shoulder and Elbow Surgery, 2011

Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active rang... more Results of the reverse shoulder prosthesis on pain are generally satisfying; however, active range of motion (ROM) is often not optimal, especially after revision. A kinematic and clinical analysis of the reverse prosthesis was performed to provide more precise information on its glenohumeral motion pattern. We hypothesized that the difference in the primary and revision cases is due to differences in the motion in the glenohumeral joint. The motion pattern of 31 patients with a reverse prosthesis (35 shoulders, 19 primary and 16 revisions) was measured during 3 active ROM tasks-forward flexion, abduction, and axial rotation. Average age was 71 ± 8 years (range, 58-85 years). Average follow-up was 23 ± 14 months (range, 4-63 months). Kinematic measurements were performed with a 3-dimensional electromagnetic tracking device. Clinical evaluation was performed by obtaining Constant score, Disabilities of Arm, Shoulder and Hand (DASH) score, and the Simple Shoulder Test (SST). Acromial-prosthetic distance was measured on anteroposterior radiographs. Primary placed prostheses showed significantly better active glenohumeral motion than revisions for forward flexion (71° ± 18° vs 53° ± 26°, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .05), abduction (64° ± 15° vs 46° ± 24°, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .05), and active external rotation (31° ± 25° vs 13° ± 16°, P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .05). Constant score improved for the whole group from 24 (range, 5-47) to 50 (range, 8-87; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001), for the primary group from 28 (range, 13-47) to 60 (range, 8-87; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001) and for revisions from 20 (range, 5-47) to 38 (range, 11-73; P &amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;lt; .001). Acromial-prosthetic distance showed no significant correlation for active glenohumeral motion. Five shoulders with a deficient teres minor muscle showed no significant decrease of external rotation. Active ROM is better in primary placed prosthesis, and this difference takes place mainly in the glenohumeral joint. In all our patients, Constant scores improved significantly postoperatively. However, we could not find any clinical correlating parameters to explain this difference.

Research paper thumbnail of Total Ankle Replacement Outcome in Low Volume Centers: Short-Term Followup

Foot & Ankle International, 2010

The indication for total ankle replacement (TAR) as an alternative to ankle fusion continues to b... more The indication for total ankle replacement (TAR) as an alternative to ankle fusion continues to be a much-debated topic. The reported survival of TAR at midterm followup is approximately 90%. The aim of this study was to compare functional outcome and survival of TAR in low volume centers versus high volume centers. A retrospective cohort study was carried out in four low volume centers. Sixty-four Salto TARs were performed between 2003 and 2007 in 60 patients. Fifty-five (59 TAR) patients were eligible for followup with 28 men. Standardized American Orthopaedic Foot and Ankle Society (AOFAS) scores, patient satisfaction, and range of motion (ROM) were measured. Standardized and dynamic radiographs were used for evaluation of radiolucencies, ROM and component alignment. Seven of the 59 ankle prostheses had to be revised: five for loosening and two for deep infection. Three of the five revised for loosening went on to fusion, and in two a revision of one of the components was performed. Both infected ankles were fused. Five patients declined to participate this study, among these two were TAR failures. Survival with revision as the endpoint was 86% at final followup. The average AOFAS score was 75 (SD ± 15). On dynamic radiographs the ROM was 22 degrees (SD ± 8) in the tibiotalar joint. This study demonstrated that functional results of total ankle replacement in low volume centers were comparable to most high volume centers but survival was lower especially when we consider our shorter followup than most comparable series.

Research paper thumbnail of Prognosis of Limitations in Activities in Osteoarthritis of the Hip or Knee: A 3-Year Cohort Study

Archives of Physical Medicine and Rehabilitation, 2010

Research paper thumbnail of Use of Serotonergic Antidepressants and Bleeding Risk in Orthopedic Patients

Anesthesiology, 2010

Selective serotonin reuptake inhibitors have been associated with an increased bleeding tendency.... more Selective serotonin reuptake inhibitors have been associated with an increased bleeding tendency. Information on the impact of a possible impaired hemostasis associated with the perioperative use of selective serotonin reuptake inhibitors is limited. This study aimed to determine the association between the perioperative use of selective serotonin reuptake inhibitors and the amount of blood loss during surgery and perioperative transfusion requirements. The authors conducted a retrospective cohort study among patients who underwent elective primary total hip arthroplasty in two hospitals from the period of July 1, 2004 until July 1, 2008. The index group included all users of both serotonergic and nonserotonergic antidepressants. The reference group included a random sample (ratio 1:3) of nonusers. The primary outcome was the amount of intraoperative blood loss. The requirement for blood transfusion was a secondary outcome. The outcomes were adjusted for confounding factors (comorbidity and comedication) using regression techniques. The index group included 66 users of serotonergic and 29 users of nonserotonergic antidepressants, and the reference group included 285 patients. After adjustment for confounding factors, mean blood loss during surgery was significantly higher in the users of selective serotonin reuptake inhibitors when compared with the reference group: 95 ml (95% CI 9-181). Mean blood loss in the users of nonserotonergic antidepressants did not differ from the reference group. Users of antidepressants did not have a higher risk for transfusion. Patients undergoing total hip arthroplasty who continue the use of serotonergic antidepressants show a significantly higher, but clinically unimportant, intraoperative blood loss, without an increase in perioperative transfusion requirements.

Research paper thumbnail of Malunion after midshaft clavicle fractures in adults

Acta Orthopaedica, 2010

This is an overview of the current literature on malunion after midshaft clavicle fracture. Anato... more This is an overview of the current literature on malunion after midshaft clavicle fracture. Anatomy, trauma mechanism, classification, incidence, symptoms, prevention, and treatment options are all discussed. The conclusion is that clavicle malunion is a distinct clinical entity that can be treated successfully. 

Research paper thumbnail of Frejka pillow and Becker device for congenital dislocation of the hip: Prospective 6-year study of 104 late-diagnosed cases

Acta Orthopaedica, 1993

During the period 1974-1986, 107 consecutive 1-9 month-old children with late-diagnosed congenita... more During the period 1974-1986, 107 consecutive 1-9 month-old children with late-diagnosed congenital dislocation of the hip (CDH) were treated with a Frejka pillow primarily, followed by a Becker device. Treatment was initially successful in 96 cases with 2 not reduced, 4 failed stabilization, 4 persisting dysplasia, and 1 avascular necrosis. No correlation was found between age at the time of diagnosis or the severity of the dislocation and the duration or the result of treatment.