Prevalence of back, neck and shoulder problems in the inner city: implications for the provision of physiotherapy services in primary healthcare

A Study of the Biomechanical Behavior of the Implantation Method of Inverted Shoulder Prosthesis (BIO⁻RSA) under Different Abduction Movements

The shoulder is the most mobile joint of the human body, but it is very fragile; several pathologies, and especially muscular degenerations in the elderly, can affect its stability. These are more commonly called rotator cuff fractures. In the case of this type of pathology, the mobility of the shoulder decreases and pain appears. In order to restore mobility and reduce pain, implantation of an inverted shoulder prosthesis is recommended. Unfortunately, over time a notch phenomenon has been observed. In the lower position of the arm, part of the implant comes into contact with the scapula and therefore causes deterioration of the bone. Among the solutions adopted is the lateralized method with bone grafting. However, a main disadvantage of this method concerns the reconstruction of the graft in the case of prosthesis revision. In this context, the aim of the present work was to reconstruct the shoulder joint in 3D in order to obtain a bio-faithful geometry, and then study the behavior of different types of biomaterials that can replace bone grafting. To this end, three arm abduction motions were examined for three individuals. From the results obtained, it appears that grafts in ultra-high molecular weight polyethylene (UHMWPE) exhibit a behavior closer to that of bones.

Shoulder pain in Iranian elite athletes: the prevalence and risk factors

OBJECTIVE

Shoulder sports injuries are relatively common in athletes who perform highly repetitive motions. The purposes of this study were to determine the prevalence of and risk factors for shoulder injuries and to analyze how individual and other sport characteristics contribute to the risk of shoulder injuries among 6 overhead sports, those being swimming, rowing, wrestling, basketball, volleyball, and handball.

METHODS

A cross-sectional study was carried out on 613 Iranian overhead sports athletes in different collegiate sport fields. Data were collected using different questionnaires. A structured questionnaire including demographics, sport characteristics, and also prevalence and risk factors of shoulder pain was used. Visual analogue scale and Disability of the Arm, Shoulder, and Hand questionnaires were used to determine the pain intensity and functional disability, respectively.

RESULTS

Point, last 6-month, last year, and lifetime prevalences of shoulder pain were 21.4%, 29%, 38.8%, and 41.6%, respectively. The highest point prevalence was related to the rowing athletes with 31.9% and the lowest for swimming athletes (12.3%). Sex, body mass index, sport level, days of practice per week, and satisfaction with income were found to be significantly correlated with the prevalence of shoulder pain (P < .05 in all instances). For those with shoulder pain, the mean pain intensity and functional disability were 53.8 mm and 15.46%, respectively.

CONCLUSIONS

The prevalence of shoulder pain in athletes with highly repetitive overhead motions seems to be high.

Soft tissue structures resisting anterior instability in a computational glenohumeral joint model

The glenohumeral joint is the most dislocated joint in the body due to the lack of bony constraints and the dependence on soft tissue for stability. The roles that various structures provide to joint function are important for understanding injury treatment and orthopaedic device design purposes. The goal of this study was to develop a computational model of the glenohumeral joint whereby joint behaviour was dictated by articular contact, ligamentous constraints, muscle loading and external perturbations. The bone structure of the computational model consisted of assembled computer tomographic images of the scapula, humerus and clavicle. The soft tissue elements were composed of forces and tension-only springs that represented muscles and ligaments. Validation of this model was achieved by comparing computational predictions to the results of a cadaveric experiment in which the relative contribution of muscles and ligaments to anterior joint stability was examined. The computational model predicted an anterior subluxation force that was similar to the cadaveric experimental results in humeral external rotation. The individual structure results showed the subscapularis to be critical to stabilisation in both neutral and external rotations, the biceps stabilised the joint in neutral but not in external rotation, and the inferior glenohumeral ligament resisted anterior displacement only in external rotation. The model's predictions were similar to the conclusions of the cadaveric experiment and the literature. Knowledge gained from this type of model could assist in further understanding the contribution of soft tissue stabilisers to joint function, pre-operative planning or the design of orthopaedic implants.

Neck pain in a sample of Greek urban population (fifteen to sixty-five years): analysis according to personal and socioeconomic characteristics

STUDY DESIGN

A cross-sectional study of neck pain and its related aspects in a sample of Greek urban population (15-65 years).

OBJECTIVE

To estimate the prevalence of neck pain in a Greek urban population (15-65 years) and to study the association of neck pain with several socioeconomic and demographic characteristics.

SUMMARY OF BACKGROUND DATA

The results of several prevalence studies carried out in different populations indicate a high frequency of neck pain in the general population. Socioeconomic and demographic factors are likely to influence neck pain frequency and neck pain-associated burden.

METHODS

A 1000-person sample of the general Greek population (15-65 years) living in the Greek capital and other urban centers of the country was selected by multiple-stage sampling, with definition of sample quotas based on demographic characteristics. Data on neck pain and its related aspects, including healthcare utilization, as well as demographic, socioeconomic, and employment data, were collected through personal interviews.

RESULTS

Of the 204 individuals who reported neck pain during the last month, 35 (17.2%) consulted a physician, 72 (35.3%) received medication, and 15 (7.4%) stayed in bed for some time, during this period and because of neck pain. The mean duration of pain for individuals who reported neck pain during the last month was 12 days. A total of 8.6% of working individuals who experienced neck pain during the last month reported work absenteeism due to this pain, during this period; the mean duration of absence was 4.6 days. Neck pain frequency was related to several sociodemographic factors. Female sex, increased age, and being married showed a statistically significant association with the presence of neck pain.

CONCLUSION

The present results indicate that neck pain is a common symptom in the studied Greek urban population. Nevertheless, relatively few individuals seek medical advice for this symptom. Neck pain frequency is associated with age, sex, and marital status.

Are localized low back pain and generalized back pain similar entities? Results of a longitudinal community based study

PURPOSE

To compare subjects with localized low back pain (LBP) and with generalized back pain (BP) with regard to baseline characteristics and long-term outcomes.

METHODS

A community-based longitudinal study. All inhabitants aged 22 - 70 of a single town were asked to complete self-administered questionnaires regarding back and neck pain and lifestyle characteristics. Those reporting LBP during the previous month were followed up after one year. Data were stratified by sites of pain with respect to 'localized LBP' and to 'LBP with additional sites of BP'. Among LBP measures were the Roland and Morris Disability scale and Pain symptoms indices.

RESULTS

Nearly 30% of the total population (602) experienced LBP during the previous month, of whom more than half (336) reported 'localized LBP' and the rest LBP + neck and or upper back pain (Generalized BP). Both subgroups differed from those free of BP, however, those reported 'Generalized BP' comprised more females, were less educated, smoked more, were less engaged in sporting activities and reported higher level of LBP measures than those reported 'localized LBP'. After one year, both subgroups were similar with regard to lifestyle but remained different with regard to some of the LBP measures.

CONCLUSIONS

Subjects with 'localized LBP' presented healthier lifestyle than subjects with 'Generalized BP'. The latter experienced higher degree of pain measures. It seems that 'Generalized BP' is not a different entity than 'localized LBP' but rather a more severe one.

Numerical modelling of the shoulder for clinical applications

Research activity involving numerical models of the shoulder is dramatically increasing, driven by growing rates of injury and the need to better understand shoulder joint pathologies to develop therapeutic strategies. Based on the type of clinical question they can address, existing models can be broadly categorized into three groups: (i) rigid body models that can simulate kinematics, collisions between entities or wrapping of the muscles over the bones, and which have been used to investigate joint kinematics and ergonomics, and are often coupled with (ii) muscle force estimation techniques, consisting mainly of optimization methods and electromyography-driven models, to simulate muscular action and joint reaction forces to address issues in joint stability, muscular rehabilitation or muscle transfer, and (iii) deformable models that account for stress-strain distributions in the component structures to study articular degeneration, implant failure or muscle/tendon/bone integrity. The state of the art in numerical modelling of the shoulder is reviewed, and the advantages, limitations and potential clinical applications of these modelling approaches are critically discussed. This review concentrates primarily on muscle force estimation modelling, with emphasis on a novel muscle recruitment paradigm, compared with traditionally applied optimization methods. Finally, the necessary benchmarks for validating shoulder models, the emerging technologies that will enable further advances and the future challenges in the field are described.

Diagnostic and treatment concordance between a physiotherapist and an orthopedic surgeon--a pilot study

Musculoskeletal impairments affect one-third of the adult population, are one of the major contributors to lost time from work, and account for one-third of a general practitioner's caseload. These injuries respond well to physiotherapy, but access can be limited in a publicly funded health care system. Improved access to physiotherapy occurs in a collaborative model of care in orthopedic clinics however the extent to which the patient receives similar diagnoses and treatment recommendations has not been reported. The purpose of this study was to determine diagnostic concordance and accuracy, and treatment concordance between a physiotherapist and orthopedic surgeons. Twenty-five subjects in an orthopedic clinic were assessed by a physiotherapist and an orthopedic surgeon. Diagnosis and treatment recommendations were made by each separately. These were compared for concordance between professionals and diagnostic accuracy. The physiotherapist and the orthopedic surgeon had 90% concordance in diagnoses of knee and shoulder impairments, and 75% accuracy when compared to definitive diagnostic methods. They had 87% agreement in treatment recommendations, however, the physiotherapist gave three treatment recommendations per patient where the surgeon gave two. In a collaborative care context therefore, this study suggests, that physiotherapists have similar diagnostic capabilities to orthopedic surgeons, and they will enhance the conservative treatment options offered to orthopedic patients.

A pilot randomized, controlled trial of treatment for painful arc of the shoulder

There is a lack of evidence about the efficacy of routinely used interventions in shoulder pain, such as corticosteroid injection and physiotherapy. This pilot study was set up to assess the feasibility of a larger, randomized controlled trial. Patients with the clinical presentation of a painful arc of less than 6 months' duration were recruited through their general practitioners. A total of 112 patients were randomized to 4 groups: control, physiotherapy, a course of subacromial steroid injections, or both physiotherapy and steroid injections. The primary outcome measure was the Oxford Shoulder Score (OSS). Follow-up was 18 weeks and by postal questionnaire at 1 year. No significant differences were found within groups between the OSS scores or the Physical Health total of the Medical Outcomes Study Short Form 36 (SF-36) Health Survey at the beginning and end of the trial or at 1 year. By analysis of covariance, no significant differences were found between treatment groups. Larger studies are needed. A power calculation from our data suggests recruitment of more than 800 patients would be required to achieve a 90% chance of a clinically significant difference being detected between these groups.

The prevalence of neck pain in the world population: a systematic critical review of the literature

The objective of this study was to determine the prevalence of neck pain (NP) in the world population and to identify areas of methodological variation between studies. A systematic search was conducted in five databases (MEDLINE, EMBASE, CINAHL, OSH-ROM, and PsycINFO), followed by a screening of reference lists of relevant papers. Included papers were extracted for information and each paper was given a quality score. Mean prevalence estimates were calculated for six prevalence periods (point, week, month, 6 months, year, and lifetime), and considered separately for age, gender, quality score, response rate, sample size, anatomical definition, geography, and publication year. Fifty-six papers were included. The six most commonly reported types of prevalence were point, week, month, 6 months, year, and lifetime. Except for lifetime prevalence, women reported more NP than men. For 1-year prevalence, Scandinavian countries reported more NP than the rest of Europe and Asia. Prevalence estimates were not affected by age, quality score, sample size, response rate, and different anatomical definitions of NP. NP is a common symptom in the population. As expected, the prevalence increases with longer prevalence periods and generally women have more NP than men. At least for 1-year prevalence Scandinavian countries report higher mean estimates than the rest of Europe and Asia. The quality of studies varies greatly but is not correlated with the prevalence estimates. Design varies considerably and standardisation is needed in future studies.

Regional musculoskeletal conditions: shoulder pain

About half the population has at least one episode of shoulder pain yearly. History and clinical examination are cornerstones in the evaluation of the patient. Shoulder pain at the work place is associated with job strain: lack of control and work with elevated arms and hand tools. Clinical skills and knowledge about red and yellow flags and biomechanics are essential to perform a systematic and reliable evaluation. The diagnostic validity of clinical tests for rotator cuff tear, impingement syndrome and superior labral tears is equal or better than ultrasound and magnetic resonance imaging. Non-steroidal anti-inflammatory drugs and cortico-steroidal injections have documented short-term pain relief. Additionally, the physician should attempt to give the patient simple advice and reinforce active coping strategies. One randomized study suggests that a proper physiotherapy regimen and surgery are equally effective for the impingement syndrome. Further research should address the cost-effectiveness of diagnostic methods and treatments.

Why do patients with chronic musculoskeletal disorders consult their primary care physicians?

Symptoms are a daily occurrence in the lives of most people, and many do not consult their doctors for their clinical complaints. Information on the frequency of musculoskeletal disorders and on healthcare utilization patterns can be obtained from population surveys or from records of visits to primary care physicians. A decision to consult a primary care physician for musculoskeletal disorders is not based simply on the presence or absence of physical symptoms, but also involves a complex mixture of social and psychological factors.