In craniofacial surgery, alloplastic materials are used for correcting bony defects. Porous polymethylmethacrylate (PMMA) is a biocompatible and nondegradable bone cement. Porous PMMA is formed by the classic bone cement formulation of methylmethacrylate liquid and PMMA powder in which an aqueous biodegradable carboxymethylcellulose gel is dispersed to create pores in the cement when cured. Pores give bone the opportunity to grow in, resulting in a better fixation of the prostheses. We evaluated the long-term results (n = 14), up to 20 years, of augmentations and defect fillings in the craniofacial area, with special interest in possible side effects and bone ingrowth. The evaluation consisted of a questionnaire, a physical examination, and a computed tomography (CT) scan. There were no side effects that could be ascribed to the porous PMMA. Twelve CT scans showed bone ingrowth into the prostheses, proving the validity behind the concept of porous PMMA.
The purpose of this study was to describe the prevalence, incidence and risk factors for climbing-related injuries of the upper extremities in recreational climbers. A total of 426 recreational climbers were recruited from indoor climbing halls. The baseline questionnaire included questions on potential risk factors for climbing injuries: personal factors, climbing-related factors and upper extremity injuries that had occurred in the previous 12 months. Follow-up questionnaires collected information on new injuries that occurred during the follow-up period. The incidence of climbing-related injuries during one-year follow-up was 42.4% with 13 injuries per 1000 h of climbing. The finger was the most frequently affected injury location (36.0%). The following risk factors were associated with the occurrence of upper extremity injuries: higher age (OR 1.03, 95% CI 1.01;1.05), performing a cooling-down (OR 2.02, 95% CI 1.28;3.18), climbing with campus board (OR 2.48, 95% CI 1.23;5.02), finger strength middle finger (OR 1.12, 95% CI 1.05;1.18) and previous injuries (OR 3.05, 95% CI 2.01;4.83). Climbing injuries of the upper body extremities are very common among recreational climbers in indoor halls and several risk factors can be identified that are related to a higher injury risk.
Background In recent years sport climbing is increasing in popularity, due to the improvements of climbing facilities. This sport has a spectrum of associated injuries which involve most frequently overuse injuries of the hand and the finger. Objective To determine the incidence of climbing related injuries in Dutch recreational climbers and to identify possible risk factors that are associated with these injuries. Design A prospective cohort study. Setting Indoor climbing halls. Participants 426 recreational climbers in four different climbing halls were recruited. Assessment of risk factors All climbers filled in a baseline questionnaire including potential risk factors such as age, gender, body mass index, education level, finger strength, climbing level/experience/time, main climbing activity, earlier injury, training with campus board, performing warming-up/cooling down and other sport activities. Finger strength was measured with the DIGITSgrip. A physical examination was performed to examine the shoulders, elbow, wrist, hand and fingers. Main outcome measurements Follow-up questionnaires were sent to all climbers at 3, 6, 9 and 12 months follow-up and reported on new injuries occurred due to climbing. Results A total of 178 (41.8%) climbers reported a new injury during the 1-year follow-up period. Fingers were the most reported injuries, followed by the elbow and shoulder. A climbing level >6a, climbing more than 40 h per 3 months, bouldering and those who train with a campus board and perform warming-up and cooling-down exercises are univariately associated with a higher injury risk. Only a climbing level >6a (OR 2.00, 95%CI 1.25 to 3.19) remained in the multivariate regression model as being associated with climbing injuries. Conclusion Climbing injuries of the upper body extremities in Dutch recreational climbers are very frequent. The most common site of an injury is the finger. A climbing level >6a is a risk factor for climbing injuries in this recreational climbing population.
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