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Juan Pons-Villanueva

Bio: Juan Pons-Villanueva is an academic researcher from University of Navarra. The author has contributed to research in topics: Injury prevention & Rotator cuff. The author has an hindex of 8, co-authored 22 publications receiving 314 citations.

Papers
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Journal ArticleDOI
TL;DR: It seems that there is no advantage on 3D CT Scan to assess version in terms of reliability of measures, and combining the Friedman method to determine the scapula axis with an intermediate glenoid line in B2 glenoids yield the most reliable measurements.

129 citations

Journal ArticleDOI
TL;DR: The scapula method is slightly more reliable for subluxation measurement of the glenohumeral joint, however, both could be used to study the influence of humeral headSubluxation on postoperative results.
Abstract: BackgroundHumeral static posterior translation is important for evaluation of osteoarthritis. Two different methods are compared for absolute difference and reliability.MethodsA group of patients with shoulder pathology were analyzed. Images were evaluated 2 times with 2 methods by 3 evaluators. The

53 citations

Journal ArticleDOI
TL;DR: It is considered that the higher risk for injuries related to soccer, team sports, skiing, tennis, running or athletics should be taken into consideration when advice for more physical activity is given to the general population.
Abstract: BACKGROUND: Physical activity is generally accepted as a healthy habit. Nevertheless, its associated risk to cause injuries has not been sufficiently evaluated. Measuring this risk more precisely would contribute to giving more accurate health advice to the general population. METHODS: Data are from participants (60% women, mean age 38 years) in a cohort of university graduates in Spain (1999-2008). Among other exposures and outcomes, they self report on frequency of participation in several physical activities over 1 year, and on incidence of sports-related injuries after 2, 4 or 6 years follow-up. Participation in 17 physical activities was categorized as a dichotomous variable (yes/no) and also according to average time per week spent in each one. Proportional hazards regression was used to estimate the adjusted relative risks [hazard ratios (HRs)] of incident injury associated with each specific physical activity or with total weekly energy expenditure in leisure-time activity [metabolic equivalents (METs)-h/week]. Statistical analyses were stratified by sex. RESULTS: We identified 1658 incident sports-related injuries among 14 356 participants after a median follow-up of 4.6 years. When we adjusted for overall energy expenditure (METs-h/week) in other activities, age and body mass index (BMI), a higher risk of injury was associated with participation in soccer, other team sports, skiing, tennis, running and athletics (HRs ranging from 1.50 to 1.86) among men. With the exception of soccer (rarely practiced by women in Spain), similar results were found for women (HRs ranging from 1.61 to 2.04). Walking, gymnastics, swimming, mountain hiking and gardening were associated with a low injury risk. CONCLUSIONS: Despite the healthy effects of physical activity, we consider that the higher risk for injuries related to soccer, team sports, skiing, tennis, running or athletics should be taken into consideration when advice for more physical activity is given to the general population. Daily routine physical activities such as walking or gardening should be encouraged. Language: en

41 citations

Journal ArticleDOI
TL;DR: Reverse arthroplasty leads to high satisfaction rates for patients with osteoarthritis and rotator cuff deficiency who had undergone previous shoulder stabilisation procedures and the improvements in clinical outcome as well as the radiographic results seem to be comparable with those of other studies reporting on the outcome of reverse shoulder arthroPLasty for other conditions.
Abstract: Purpose Osteoarthritis in combination with rotator cuff deficiency following previous shoulder stabilisation surgery and after failed surgical treatment for chronic anterior shoulder dislocation is a challenging condition. The aim of this study was to analyse the results of reverse shoulder arthroplasty in such patients.

32 citations

Journal ArticleDOI
TL;DR: In this cohort, participants who eventually suffered a crash had a worse health status before their MVC than those who did not suffer a MVC, and lost even further health after the injurious event.
Abstract: Despite the prevailing notion that injury victims are healthy subjects, there is scarce evidence on their preinjury health status, particularly for motor vehicle crash (MVC) victims, where changes between their preinjury health status (or age- and sex-adjusted standards) have seldom been compared with their postinjury status. This longitudinal study recorded pre-event self-reported health status (as measured by Short Form-36 scores) of cohort participants who were followed up for 4 years. Differences at the beginning and end of follow-up as well as differences in Short Form-36 scores changes over time were compared according to the occurrence of a MVC during that time. From 3,361 participants included for analysis, 64 had an incident MVC. At baseline, those participants who would not subsequently have a MVC had better health than those who would have it. In addition, those who reported being in a crash lost more health after the crash than their noncrash counterparts, although these differences were only seen in adjusted analyses. Adjusted analyses showed a significantly greater worsening of health in MVC victims, particularly in regard to role physical (adjusted difference in 4 years change, −7.7; 95% CI, −13.6 to −1.9), bodily pain (−5.9; 95% CI, −11.4 to −0.3), and role emotional (−6.2; 95% CI, −12.5 to −0.02). In this cohort, participants who eventually suffered a crash had a worse health status before their MVC than those who did not suffer a MVC. Even further health was lost after the injurious event. These findings bear particular relevance when assessing the burden of disease, or when conducting effectiveness evaluation studies at the individual and population level.

18 citations


Cited by
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Journal ArticleDOI
TL;DR: Reverse shoulder arthroplasty is a viable surgical option to solve both the problem of severe static posterior glenohumeral instability and severe glenoid erosion and can result in excellent clinical outcomes.
Abstract: Background: The biconcave glenoid in patients with primary glenohumeral osteoarthritis represents a surgical challenge because of the associated static posterior instability of the humeral head and secondary posterior glenoid erosion. The purpose of the present study was to evaluate the clinical and radiographic results of reverse total shoulder arthroplasty for the treatment of primary osteoarthritis in patients with a biconcave glenoid without rotator cuff insufficiency. Methods: We performed a retrospective review of twenty-seven reverse shoulder arthroplasties that were performed from 1998 to 2009 for the treatment of primary glenohumeral osteoarthritis and biconcave glenoid. Eighty-one percent of the patients were female, and the mean age of the patients at the time of surgery was 74.1 years (range, sixty-six to eighty-two years). All patients had a preoperative computed tomography arthrogram to allow for the measurement of glenoid retroversion and humeral head subluxation. The mean preoperative retroversion was 32°, and the mean subluxation of the humeral head with respect to the scapular axis was 87%. Seventeen patients had a reverse shoulder arthroplasty without bone graft, whereas ten had an associated bone graft to compensate for posterior glenoid erosion. Clinical outcomes were evaluated with the Constant score and shoulder range of motion. Results: The mean duration of follow-up was fifty-four months (range, twenty-four to 139 months). The mean Constant score increased from 31 points preoperatively to 76 points at the time of the latest follow-up (p < 0.0001). Active forward flexion, external rotation, and internal rotation also significantly increased (p < 0.0001). Complications occurred in four patients (15%) and included early loosening of the glenoid component (one patient) and neurologic complications (three patients). No radiolucent lines were observed around the central peg or screws of the glenoid component. Grade-1 or 2 scapular notching was present in ten shoulders (37%). No recurrence of posterior instability was observed. Conclusions: Reverse shoulder arthroplasty for the treatment of primary glenohumeral osteoarthritis in patients with a biconcave glenoid without rotator cuff insufficiency can result in excellent clinical outcomes. Reverse shoulder arthroplasty is a viable surgical option to solve both the problem of severe static posterior glenohumeral instability and severe glenoid erosion. Level of Evidence: Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

315 citations

Journal ArticleDOI
TL;DR: Improved interobserver and intraobserver reliabilities are obtained when 3-dimensional glenoid reconstructions and the modified Walch classification described herein are used.

301 citations

Journal ArticleDOI
TL;DR: It is found that the preoperative measurement of the neoglenoid retroversion was best for predicting postoperative complications in terms of glenoid loosening and dislocation.

300 citations

Journal ArticleDOI
TL;DR: Novel three-dimensional preoperative planning, coupled with patient and implant-specific instrumentation, allows the surgeon to better define the preoperative pathology, select the optimal implant design and location, and then accurately execute the plan at the time of surgery.
Abstract: Background: Glenoid component malposition for anatomic shoulder replacement may result in complications. The purpose of this study was to define the efficacy of a new surgical method to place the glenoid component. Methods: Thirty-one patients were randomized for glenoid component placement with use of either novel three-dimensional computed tomographic scan planning software combined with patient-specific instrumentation (the glenoid positioning system group), or conventional computed tomographic scan, preoperative planning, and surgical technique, utilizing instruments provided by the implant manufacturer (the standard surgical group). The desired position of the component was determined preoperatively. Postoperatively, a computed tomographic scan was used to define and compare the actual implant location with the preoperative plan. Results: In the standard surgical group, the average preoperative glenoid retroversion was −11.3° (range, −39° to 17°). In the glenoid positioning system group, the average glenoid retroversion was −14.8° (range, −27° to 7°). When the standard surgical group was compared with the glenoid positioning system group, patient-specific instrumentation technology significantly decreased (p < 0.05) the average deviation of implant position for inclination and medial-lateral offset. Overall, the average deviation in version was 6.9° in the standard surgical group and 4.3° in the glenoid positioning system group. The average deviation in inclination was 11.6° in the standard surgical group and 2.9° in the glenoid positioning system group. The greatest benefit of patient-specific instrumentation was observed in patients with retroversion in excess of 16°; the average deviation was 10° in the standard surgical group and 1.2° in the glenoid positioning system group (p < 0.001). Preoperative planning and patient-specific instrumentation use resulted in a significant improvement in the selection and use of the optimal type of implant and a significant reduction in the frequency of malpositioned glenoid implants. Conclusions: Novel three-dimensional preoperative planning, coupled with patient and implant-specific instrumentation, allows the surgeon to better define the preoperative pathology, select the optimal implant design and location, and then accurately execute the plan at the time of surgery. Level of Evidence: Therapeutic Level I. See Instructions for Authors for a complete description of levels of evidence.

202 citations

Journal ArticleDOI
TL;DR: Correcting 2D glenoids version by 3D reconstruction to the transverse plane perpendicular to the scapular body allows for an accurate assessment of glenoid version in spite of positioning differences and results in increased accuracy while maintaining high reliability.

174 citations