Preventive aspects regarding back pain

Finite element biomechanical analysis of 3D printed intervertebral fusion cage in osteoporotic population

OBJECTIVE

To study the biomechanical characteristics of each tissue structure when using different 3D printing Cage in osteoporotic patients undergoing interbody fusion.

METHODS

A finite element model of the lumbar spine was reconstructed and validated with regarding a range of motion and intervertebral disc pressure from previous in vitro studies. Cage and pedicle screws were implanted and part of the lamina, spinous process, and facet joints were removed in the L4/5 segment of the validated mode to simulate interbody fusion. A 280 N follower load and 7.5 N·m moment were applied to different postoperative models and intact osteoporotic model to simulate lumbar motion. The biomechanical characteristics of different models were evaluated by calculating and analyzing the range of motion of the fixed and cephalic adjacent segment, the stress of the screw-rod system, the stress at the interface between cage and L5 endplate, and intervertebral disc pressure of the adjacent segment.

RESULTS

After rigid fixation, the range of motion of the fixed segment of model A-C decreased significantly, which was much smaller than that of the osteoporotic model. And with the increase of the axial area of the interbody fusion cages, the fixed segment of model A-C tended to be more stable. The range of motion and intradiscal pressure of the spinal models with different interbody fusion cages were higher than those of the complete osteoporosis model, but there was no significant difference between the postoperative models. On the other hand, the L5 upper endplate stress and screw-rod system stress of model A-C show a decreasing trend in different directions of motion. The stress of the endplate is the highest during flexion, which can reach 40.5 MPa (model A). The difference in endplate stress between models A-C was the largest during lateral bending. The endplate stress of models A and B was 150.5% and 140.9% of that of model C, respectively. The stress of the screw-rod system was the highest during lateral bending (model A, 102.0 MPa), which was 108.4%, 102.4%, 110.4%, 114.2% of model B and 158.5%, 110.1%, 115.8%, 125.4% of model C in flexion, extension, lateral bending, and rotation, respectively.

CONCLUSIONS

For people with osteoporosis, no matter what type of cage is used, good immediate stability can be achieved after surgery. Larger cage sizes provide better fixation without significantly increasing ROM and IDP in adjacent segments, which may contribute to the development of ASD. In addition, larger cage sizes can disperse endplate stress and reduce stress concentration, which is of positive significance in preventing cage subsidence after operation. The cage and screw rod system establish a stress conduction pathway on the spine, and a larger cage greatly enhances the stress-bearing capacity of the front column, which can better distribute the stress of the posterior spine structure and the stress borne by the posterior screw rod system, reduce the stress concentration phenomenon of the nail rod system, and avoid exceeding the yield strength of the material, resulting in the risk of future instrument failure.

PosturAll: A Posture Assessment Software for Children

From an early age, people are exposed to risk factors that can lead to musculoskeletal disorders like low back pain, neck pain and scoliosis. Medical screenings at an early age might minimize their incidence. The study intends to improve a software that processes images of patients, using specific anatomical sites to obtain risk indicators for possible musculoskeletal problems. This project was divided into four phases. First, markers and body metrics were selected for the postural assessment. Second, the software's capacity to detect the markers and run optimization tests was evaluated. Third, data were acquired from a population to validate the results using clinical software. Fourth, the classifiers' performance with the acquired data was analyzed. Green markers with diameters of 20 mm were used to optimize the software. The postural assessment using different types of cameras was conducted via the blob detection method. In the optimization tests, the angle parameters were the most influenced parameters. The data acquired showed that the postural analysis results were statistically equivalent. For the classifiers, the study population had 16 subjects with no evidence of postural problems, 25 with mild evidence and 16 with moderate-to-severe evidence. In general, using a binary classification with the train/test split validation method provided better results.

The influence of comorbidities on outcomes for older people with back pain: BACE-D cohort study

BACKGROUND

Comorbidities are common in older people with back pain but little is known about the influence of comorbidities on outcomes.

OBJECTIVES

To explore the influence of the most prevalent comorbidities, and the number of comorbidities, on short (at 3 months) and long-term (at 12 months) outcomes of back pain in older people.

METHODS

We analyzed data from the 'Back Complaints in the Elders' Dutch study cohort (BACE-D) and included participants aged >55 years. We used the modified Self-Administered Comorbidities Questionnaire (SCQ), the Numeric Rating Scale (NRS) and the Roland-Morris Disability Questionnaire (RMDQ) to assess the number of comorbidities, pain intensity and back-related physical functioning, respectively. We conducted separate linear regression models to analyze the association between comorbidities and outcomes including potential confounders of age, sex, body mass index, smoking and alcoholic drinking status, back pain history, and baseline NRS and RMDQ scores.

RESULTS

Our study included 669 participants with a mean age of 66.5 (SD 7.7) years of whom 394 were female. More comorbidities were positively associated with higher pain intensity (3-month regression coefficient (β) =0.27, 95% CI 0.14-0.39; 12-month β = 0.31, 95% CI 0.17-0.45) and worse physical functioning (3-month β = 0.54, 95% CI 0.31-0.77; 12-month β = 0.64, 95% CI 0.37-0.92). Four of the 5 commonest comorbidities were musculoskeletal problems. Older participants with musculoskeletal comorbidities had higher pain intensity (3-month β = 0.89 95% CI 0.41-1.37; 12-month β = 1.17, 95% CI 0.65-1.69), and worse physical functioning (3-month β = 1.61, 95% CI 0.71-2.52; 12-month β = 1.85, 95% CI 0.82-2.89, P-value < 0.001) compared to participants without musculoskeletal comorbidities.

CONCLUSIONS

More comorbidities are associated with worse back pain outcomes in older adults. Participants with musculoskeletal comorbidities had worse back pain outcomes than those without.

Effects of lumbar-pelvic training combined with electroacupuncture on chronic nonspecific low back pain

This observational study was conducted to investigate the effect of lumbar-pelvic training (LP) combined with electroacupuncture (EA) in the treatment of chronic nonspecific low back pain. One hundred and twenty patients diagnosed with chronic nonspecific low back pain were evenly randomized to receive the following 4 treatments for 2 weeks: LP combined with EA (Group A), EA (Group B), LP (Group C) or no intervention (Group D). The LP was a self-developed training program containing 5 movements and was conducted three times a week to build up the strength of abdomen muscle groups. Four acupoints along the foot-taiyang bladder meridian and the governor vessel were chosen for EA five times a week based on the theory of Traditional Chinese Medicine. The Visual Analog Scale and Oswestry Disability Index were measured before and after treatment to assess the reduction of pain intensity and functional disability, respectively. Following the treatments, Visual Analog Scale and Oswestry Disability Index scores in all 3 intervention groups were significantly lower than those in the Group D without intervention (P < .01). Among the intervention groups, Group A's scores were lower than those of Group B or Group C (P < .01). The overall efficacy of Group A was 93.33%, which was higher than that of Group B (76.67%) and Group C (70.00%) (P < .01). In conclusion, this study suggest that our self-developed lumbar-pelvic training combined with electroacupuncture is effective for chronic nonspecific low back pain in terms of pain and disability reduction.

Management of non-specific thoracic spine pain: a cross-sectional study among physiotherapists

BACKGROUND

The thoracic area has mainly been neglected in research compared to the lumbar and cervical regions. No clinical practice guidelines (CPGs) for non-specific thoracic spine pain (TSP) have been compiled. Therefore, it can be argued that the absence of specific CPGs raises questions about the management of non-specific TSP. Hence, this study aimed at determining the management of non-specific TSP among physiotherapists in Italy.

METHODS

A web cross-sectional survey investigating physiotherapists' management of non-specific TSP was conducted. The survey instrument was divided into three sections. The first section obtained participants' characteristics. The second section determined participants' agreement with 29 statements regarding the clinical management of non-specific TSP utilising a five-point Likert scale. Participants who partially or completely agreed (scores 4-5) were considered to agree with the statements. A ≥ 70% of agreement with a statement was considered as consensus according to previous literature. The third section asked the participants to indicate how often they adopted several treatments to manage non-specific TSP with a 5-point scale (always - often - sometimes - rarely - never). The frequencies of answers were calculated, and a visual representation through a bar chart was reported. The online version of the survey instrument was delivered through the newsletter of the Italian Association of Physiotherapists and the postgraduate master's degree in Rheumatic and Musculoskeletal Rehabilitation of the University of Genova (Genova, Italy).

RESULTS

In total, 424 physiotherapists (mean age (SD): 35.1 years (10.5); 50% female) completed the survey. In the second section, physiotherapists achieved consensus for 22/29 statements. Those statements addressed the importance of psychosocial factors, exercise, education, and manual therapy techniques in managing non-specific TSP. In the third section, 79.7% of participants indicated they would always adopt a multimodal treatment (education, therapeutic exercise, manual therapy), followed by education and information (72.9%), therapeutic exercise (62.0%), soft tissue manual therapy (27.1%), and manual therapy (16.5%).

CONCLUSIONS

Study participants considered fundamentally using a multimodal programme based on education, exercise and manual therapy to manage non-specific TSP. This approach aligns with the CPGs for other chronic musculoskeletal pain than non-specific TSP.

Biomechanical evaluation of different sizes of 3D printed cage in lumbar interbody fusion-a finite element analysis

OBJECTIVE

To study the biomechanical characteristics of various tissue structures of different sizes of 3D printed Cage in lumbar interbody fusion.

METHODS

A finite element model of normal spine was reconstructed and verified. Pedicle screws and Cage of different sizes were implanted in the L4/5 segment to simulate lumbar interbody fusion. The range of motion of the fixed and cephalic adjacent segment, the stress of the screw-rod system, the stress at the interface between cage and L5 endplate, and intervertebral disc pressure of the adjacent segment were calculated and analyzed.

RESULTS

The range of motion and intervertebral disc pressure of the adjacent segment of each postoperative model were larger than those of the intact model, but there was not much difference between them. The stress of cage-endplate interface was also larger than that of the intact model. However, the difference is that the stress of the endplate and the screw-rod system has a tendency to decrease with the increase of the axial area of cage.

CONCLUSIONS

Cage with larger axial area in lumbar interbody fusion can reduce the stress of internal fixation system and endplate, but will not increase the range of motion and intervertebral disc pressure of adjacent segment. It has a certain effect in preventing the cage subsidence, internal fixation system failure and screw rod fracture.

Back and neck problems as well as disadvantageous ergonomic behavior patterns in university students: Concomitants of the pandemic?

Background

As a part of the coronavirus disease 2019 (COVID-19) lockdown measures, universities converted courses to digital formats, leading to remote studying. It is unclear how these measures affect university students in terms of musculoskeletal problems (i.e., neck and back pain), e.g., by non-ergonomically equipped home offices or reduced physical activity.

Material and methods

Students from Osnabrück University weresurveyed via fully standardized online questionnaires from early March to mid-April 2022 (6 weeks) about neck and back problems, movement behavior in home offices, and personal information.

Results

Of 447 students who clicked on the link, 378 students (80.4% female, mean age: 24.1 ± 4.2 years) answered the questionnaire (response rate: 84.6%). 299 (79.1%) students suffered from neck pain and 294 (77.8%) from back pain during the pandemic. 206 (54.4%) students generally used ergonomic furniture, 83 (22.0%) used ergonomic sitting furniture, 57 (15.1%) used a standing desk, and 212 (56.1%) used aids for a more comfortable use of laptops in home office. 203 (53.7%) students took movement breaks in home office, 207 (54.8%) worked out regularly, and 65 (17.2%) moved regularly in the fresh air.

Conclusions

The present study found a high rate of neck and back pain amongst university students. Measures are needed to prevent neck and back pain in this group, considering that increased physical activity and enhanced home office equipment might be beneficial.

Diagnosis-Specific Work Disability before and after Lumbar Spine Decompression Surgery-A Register Study from Sweden

Low back pain (LBP) patients undergoing lumbar spine decompression surgery (LSDS) often suffer from multi-comorbidity and experience high work disability. This study aimed to identify diagnosis-specific work disability patterns in all LBP-patients before and after LSDS during 2008-2010, that were aged 19-60 years and living in Sweden (n = 10,800) and compare these patterns to LBP-patients without LSDS (n = 109,179), and to matched individuals without LBP (n = 472,191). Work disability days (long-term sickness absence (LTSA), disability pension (DP)) during the three years before to three years after the cohort's entry date were identified by generalised estimating equations. LBP-patients undergoing LSDS had higher overall work disability during the three years following surgery (LTSA: 23.6%, DP: 6.3%) than LBP-patients without LSDS (LTSA: 19.5%, DP: 5.9%), and those without LBP (LTSA: 7.9%, DP: 1.7%). Among patients undergoing LSDS, the prevalence of work disability due to dorsopathies increased from 20 days three years before surgery to 70 days in the year after and attenuated to 30 days in the third year following surgery. Work disability for other diagnoses remained stable at a low level in this group (<10 days annually). LBP-patients undergoing LSDS have an unfavourable long-term work disability prognosis, primarily due to dorsopathies. Decompression surgery seemed to restrict further inclines in work disability in the long run.

Rehabilitation for Low Back Pain: A Narrative Review for Managing Pain and Improving Function in Acute and Chronic Conditions

Low back pain (LBP) is prevalent and may transition into chronic LBP (cLBP) with associated reduced quality of life, pain, and disability. Because cLBP affects a heterogenous population, rehabilitation efforts must be individualized to meet the needs of various patient populations as well as individuals. This narrative review evaluated the many approaches to LBP rehabilitation including treatment-based classifications and specific types of rehabilitation efforts from exercise and physical therapy to spinal manipulation and bracing. Clinicians caring for patients with LBP or cLBP must be aware of the various options to find the right treatment course for each patient. In many cases, with proper patient expectations and care, nonpharmacological options may suffice to manage cLBP. While there is a rightful role for analgesics in the management of LBP, nonpharmacological options should be seriously considered, as they can play an important and health-sustaining role in patient management.

Prescription of individual therapeutic exercises via smartphone app for patients suffering from non-specific back pain : A qualitative feasibility and quantitative pilot study

Background

The purpose of this qualitative study was the assessment of the feasibility and acceptance of orthopedists prescribing individualized therapeutic exercises via a smartphone app to patients suffering from non-specific back pain.

Methods

A total of 27 patients (mean age 44.8 ± 13.2 years) diagnosed with acute non-specific back pain were prescribed individually chosen therapy exercises via a smartphone app. Before the patients started and after 4 weeks of exercising all participants went through an assessment protocol consisting of questionnaires (Oswestry Disability Index [ODI], Short Form-36 [SF-36], International Physical Activity Questionnaire [IPAQ], Work Ability Index [WAI], Visual Analogue Scale [VAS] back pain, sociodemographic parameters), assessment of functional parameters (handgrip strength, timed up and go test). With 16 randomly chosen patients semi-structured interviews were undertaken at the end of the intervention period. Interview transcripts were analyzed using thematic analysis. Power analysis and a priori sample size calculations were undertaken with the quantitative data.

Results

From the interviews four thematic categories emerged: prior exercise experience, evaluation of exercise intensity, communication with physician via smartphone app, and variability of exercise location. Quantitative analysis of secondary data showed significant improvements in back pain (ODI) as well as quality of life domains “physical functioning”, “bodily pain” and “vitality” (SF-36) of which “bodily pain” was sufficiently powered with the current sample size.

Conclusion

The prescription of therapeutic exercises via smartphone app to patients suffering from non-specific back pain is feasible and well-accepted in patients at all ages. Pilot data additionally pointed towards efficacy of the intervention.

Health effects of direct triaging to physiotherapists in primary care for patients with musculoskeletal disorders: a pragmatic randomized controlled trial

Background:

Physiotherapists and general practitioners (GPs) both act as primary assessors for patients with musculoskeletal disorders in primary care. Previous studies have shown that initial triaging to physiotherapists at primary healthcare centres has advantages regarding efficiency in the work environment and utilization of healthcare. In this study, we aimed primarily to determine whether triaging to physiotherapists affects the progression of health aspects over time differently than traditional management with initial GP assessment. The secondary aim was to determine whether triaging to physiotherapists affects patients’ attitudes of responsibility for musculoskeletal disorders.

Methods:

This was a pragmatic trial where both recruitment and treatment strategies were determined by clinical, not study-related parameters, and was initiated at three primary care centres in Sweden. Working-age patients of both sexes seeking primary care for musculoskeletal disorders and nurse assessed as suitable for triaging to physiotherapists were randomized to initial consultations with either physiotherapists or GPs. They received self-assessment questionnaires before the initial consultation and were followed up at 2, 12, 26 and 52 weeks with the same questionnaires. Outcome measures were current and mean (3 months) pain intensities, functional disability, risk for developing chronic musculoskeletal pain, health-related quality of life and attitudes of responsibility for musculoskeletal conditions. Trends over time were analysed with a regression model for repeated measurements.

Results:

The physiotherapist-triaged group showed significant improvement for health-related quality of life at 26 weeks and showed consistent but nonsignificant tendencies to greater reductions of current pain, mean pain in the latest 3 months, functional disability and risk for developing chronic pain compared with traditional management. The triage model did not consistently affect patients’ attitudes of responsibility for musculoskeletal disorders.

Conclusions:

Triaging to physiotherapists for primary assessment in primary care leads to at least as positive health effects as primary assessment by GPs and can be recommended as an alternative management pathway for patients with musculoskeletal disorders.

ClinicalTrials.gov identifier:

NCT148611.

Socio-economic factors associated with the 1‑year prevalence of severe pain and pain-related sickness absence in the Austrian population

Background

The aim of this study was to (1) investigate the relation of socio-economic status (SES), measured as education, occupation, and income, with the 12-month prevalence of severe pain and with pain-related sickness absence, and (2) analyse to what extent sociodemographic and medical factors influence these associations.

Methods

The study population comprised 8084 subjects aged between 15 and 65 years from the Austrian Health Interview Survey in 2006/07. Associations of SES with the 1‑year prevalence of severe pain and sickness absence due to pain in those with severe pain was assessed with logistic regression analysis and adjusted for socio-demographic and chronic medical conditions.

Results

The 1‑year prevalence of severe pain was 33.7%. Among those with severe pain, 32.9% were on sickness absence due to pain. SES was significantly associated with the prevalence of severe pain and even more strongly with sickness absence due to pain. Stepwise adjustment for socio-demographics and medical factors had only marginal effects on these associations. Multivariate odds ratios (ORs) for severe pain were 1.14; 1.18 and 1.32 for low income, blue-collar workers, and low education, respectively. Related ORs for sickness absence due to pain were 1.52; 1.14 and 2.05.

Conclusions

There was an association between SES, particularly measured as educational level, and the prevalence of severe pain, which was even stronger with sickness absence due to pain.

How are socio-demographic and psycho-social factors associated with the prevalence and chronicity of severe pain in 14 different body sites? A cross-sectional population-based survey

BACKGROUND

Severe pain and chronic pain have a high impact on individuals and society. Body location of pain is important with regard to perception, articulation, and underlying biological, mental or social causes of pain.

METHODS

A cross-sectional survey was performed in the general Austrian population with 15,474 personally interviewed subjects aged 15 years and older.

RESULTS

The 1‑year period prevalence of severe pain in any body site was 38.6% and of chronic pain 24.9%. In all, 8.1% had pain in at least three body sites. Subjects aged 65 years and older (52.2%), those with low education (43.4%), unemployed subjects (50.4%), retired subjects (52.4%), those with anxiety/depression (67.7%), and subjects with lack of social support (49.6%) were sub-populations with high pain prevalence. In multivariate analyses, depression/anxiety was associated with prevalence and chronicity of severe pain in all body sites (range of ORs 1.89-5.01), while such associations were found for lack of social support (range of ORs 1.33-1.65), female sex (range of ORs 1.38-2.34), higher age (range of ORs 1.09-1.18 for 5 year intervals), as well as low educational (range of ORs 1.47-2.06 primary vs. tertiary education) and unemployment status (range of ORs 1.50-2.62) in most body sites. Being born in non-EU or EFTA states was associated with pain in many body sites (range of ORs 1.38-2.10).

CONCLUSIONS

Psychosocial factors are associated with pain presence in similar ways irrespective of location. Regarding socio-demographic factors, differences towards the magnitude and the direction in the association with pain frequency and chronicity in different body sites emerged.