[Predictors of the Use of Different Occupational Rehabilitation Measures: A Comparison of Integration Measures, Partial Qualifications and Full Training]. / Prädiktoren für die Inanspruchnahme unterschiedlicher Leistungen zur Teilhabe am Arbeitsleben: Ein Vergleich von Integrationsmaßnahmen, Teilqualifizierungen und Vollausbildungen.

PURPOSE: Occupational rehabilitation is an essential part of supporting return to work by the statutory pension insurance institutes. It is useful if health-related restrictions threaten the ability to work. There are various forms of occupational rehabilitation which differ considerably in terms of content, structure, duration, intensity of care and costs. The aim of the study was to identify personal characteristics that can influence the use of three different occupational rehabilitation measures. METHODS: All rehabilitants who underwent an occupational rehabilitation in the cooperating occupational rehabilitation centre (Berufsförderungswerk) from 2009 to 2014 under the funding of the German Federal Pension Fund were included in the analysis. A multinomial logistic regression was calculated in order to obtain information on the predictors of utilization of three occupational rehabilitation measures (integration measure, partial qualification, full training). As potential influencing factors, various sociodemographic characteristics as well as various parameters that reflect the employment status of rehabilitants in the previous year were included in the model. RESULTS: The analyses included a total of 934 rehabilitants who had completed an integration measure (n=443), partial qualification (n=315) or full training (n=176). In the final logistic regression model, gender (p<0.0001), age (p<0.0001), education level (p=0.0033), driving license (p<0.0001), willingness to move (p=0.0012), recognized disability (p=0.0404) and the employment status in the third month before the start of the measure (p=0.0020) proved to be significant predictors of utilization. CONCLUSION: The utilization of the different occupational rehabilitation measures is determined by various influencing factors. In particular, the more extensive and cost-intensive full training are more likely to be taken up by younger, male and more highly qualified rehabilitants.

[Requirements for trauma rehabilitation centers : Post-acute rehabilitation (phase C) after severe trauma injury]. / Anforderungen an Traumarehabilitationszentren : Postakute Rehabilitation (Phase C) nach schwerer Unfallverletzung.

Severely injured patients need a qualified and seamless rehabilitation after the end of the acute treatment. This post-acute rehabilitation (phase C) places high demands on the rehabilitation facility in terms of personnel, material, organizational and spatial requirements.The working group on trauma rehabilitation of the German Society for Orthopedics and Traumatology e. V. (DGOU) and other experts have agreed on requirements for post-acute phase C rehabilitation for seriously injured people. These concern both the personnel and material requirements for a highly specialized orthopedic trauma surgery trauma rehabilitation as well as the demands on processes, organization and quality assurance.A seamless transition to the follow-up and further treatment of seriously injured people in the TraumaNetzwerk DGU® is ensured through a high level of qualification and the corresponding infrastructure of supraregional trauma rehabilitation centers. This also places new demands on the TraumaZentren DGU®. Only if these are met can the treatment and rehabilitation of seriously injured people be optimized.

[Effect of Rehabilitation on the Delayed Entry into the Retirement due to Reduced Earning Capacity]. / Effekt der Rehabilitation auf den verzögerten Eintritt in die Berentung aufgrund von Erwerbsminderung.

BACKGROUND: Early retirements make up a large portion of indirect costs of illness caused by chronic back pain. METHODS: Claims data from statutory health insurance and German Pension Fund provide the basis for analysis. Cox-Regression was performed for duration to early retirement, whereby beside sociodemographic and treatment characteristics, the effect of rehabilitation was considered. RESULTS: Early retirement started on average 7.1 month later through rehabilitation. Therefore, rehabilitants made € 8,432.60 higher payments to statutory health insurance and German Pension Fund per rehabilitant. Based on the total number of 21,262 early retirees with orthopedic indications, this can save € 180.7 million. The timing of the early retirement was also affected by age and sickness benefits in the previous month. Savings by avoiding entry into early retirement have not yet been taken into account in this model. CONCLUSION: Rehabilitants receive later pensions due to reduced ability, which allow for more contributions to statutory health insurance and German Pension Fund. This indicates that medical rehabilitation is an economic and effective treatment.

Predictive value of metacarpophalangeal stabilization tests for simulated ulnar nerve lesion measured by a sensor glove.

STUDY DESIGN: A within-subject research design was used in this study. The difference of the range of motion (ROM) with and without ulnar nerve block was analyzed. INTRODUCTION: For the clinical evaluation of the functional effects of ulnar nerve palsy at the hand the relevance of clinical tests is in discussion. PURPOSE OF THE STUDY: The aim of the study was to evaluate the predictive value of 2 clinical tests for a simulated ulnar nerve lesion by motion analysis with a sensor glove. METHODS: In 28 healthy subjects, dynamic measurements of the finger joints were performed by a sensor glove with and without ulnar nerve block at the wrist. In the 0° metacarpophalangeal (MCP) stabilization test, the subjects were asked to stabilize the MCP joints actively in 0° while moving the interphalangeal joints, whereas at the 90° MCP stabilization test, the subjects stabilized the MCP joints actively in the 90° position. RESULTS: In the 0° MCP stabilization test, no remarkable changes of the ROM were found at the MCP joints; at the proximal interphalangeal joints 2-5, the ROM decreased with ulnar nerve block, significantly at the index, middle, and ring fingers (P < .05). In the 90° MCP stabilization test, the average ROM of the MCP joints 2-5 significantly increased with ulnar nerve block (P < .05), whereas at the PIP joints, the average ROM decreased (P < .05). DISCUSSION: The 90° MCP stabilization test had a high predictive value for the discrimination between healthy subjects and subjects with a simulated peripheral ulnar nerve lesion. CONCLUSIONS: The results could be relevant for the determination of the functional effect of ulnar nerve palsy and the quantification of clawing in hand rehabilitation. LEVEL OF EVIDENCE: II.

[Utilization of Rehabilitation After Orthopedic Operation - Does Severity of Case Influence the Setting of Rehabilitation (Out- Vs. Inpatient)?] / Inanspruchnahme einer Anschlussrehabilitation nach orthopädischer Operation ­ Beeinflusst die Fallschwere das Rehabilitationssetting (ambulant vs. stationär)?

OBJECTIVE: The aim of this study was to examine which factors predict rehabilitation setting (inpatient vs. outpatient) after hospitalization in order to indicate the meaning of severity for access to a certain kind of rehabilitation. METHODS: All patients with surgery for hip or knee (joint) endoprosthesis or disc surgery between 2005 and 2010 were selected for analysis from anonymized data from statutory health insurance (AOK Baden-Württemberg) and German Pension Fund (Bund as well as Baden-Württemberg). Logistic regression was performed for outpatient vs. inpatient rehabilitation. RESULTS: Patients from all surgery groups utilize more often inpatient rehabilitation, if they started treatment immediately after hospitalization than patients that start treatment after a period at home. With increasing age as well as comorbidities patients use more inpatient rehabilitation. The probability for inpatient rehabilitation decreased between 2005 and 2009. CONCLUSION: Beneath severity also context factors seem to be issues for the choice of inpatient or outpatient rehabilitation. For a demand-orientated access to a certain kind of rehabilitation, environmental conditions like support by family or accessibility to therapeutic, nursing or medical assistance and medical parameters like severity should be weighed against each other.

[Health Economic Effects of Rehabilitation for Chronic Back Pain - An Observational Study with Combined Secondary Data from Statutory Health Insurance and German Pension Fund]. / Gesundheitsökonomische Effekte der Rehabilitation bei chronischem Rückenschmerz ­ Eine Beobachtungsstudie mittels kombinierten Sekundärdaten einer gesetzlichen Krankenkasse und der Deutschen Rentenversicherung.

BACKGROUND: Chronic back pain is the most common indication in medical rehabilitation. Numerous studies hint on positive effects of rehabilitation on health state. However, there is no evidence about the effectiveness of rehabilitation due to the lack of a valid comparison group. METHODS: Based on combined secondary data from German Pension Fund and statutory health insurance, a comparison group of insured persons was identified by their typical patient career that did not apply for rehabilitation for unclear reasons. Effectiveness was measured by direct and indirect costs of back pain between rehabilitants and non-rehabilitants. RESULTS: Costs of rehabilitation split in 2.742 € direct costs and 2.597 € indirect costs. In the 2 years following rehabilitation, rehabilitants were hospitalized less frequent and caused less indirect costs due to disability. Therefore, the benefit of rehabilitation was 727 € in the first year after rehabilitation and additional 37 € in the subsequent year. CONCLUSION: Rehabilitation for chronic back pain contributes to maintain the ability to work. Moreover, rehabilitation reduces duration of disability and healthcare utilization, hence direct and indirect costs of illness are lowered compared to a treatment without rehabilitation. Effects of rehabilitation by avoidance and delay of retirement are not yet recorded.

[A Projection of the Need for Rehabilitation in Germany Till 2040 Based on Demographic Factors]. / Eine Fortschreibung des Rehabilitationsbedarfs in Deutschland bis 2040 anhand demografischer Faktoren.

The demographic changes in Germany leads to a significant shift in the composition of the population and the workforce, this affecting the future need for medical rehabilitation. This paper estimates the future change in rehabilitation demand based on a forecast for demographic changes till 2040. First, the sensitivity of the rehabilitation demand with respect to demographic factors is estimated. Second, the demographic factors are projected by stochastic methods, resulting in forecasts for the future need for medical rehabilitation. The projections show that the short-term demand is likely to rise. Theoretically, yearly wage increases of about 2.2% are needed for covering the increasing medical rehabilitation costs from 2010 till 2017. For the mid-term demand, the model predicts a slight decline in rehabilitation cases. Considering all these facts, the budget for rehabilitation will probably not cover the future costs for rehabilitation. However, the long-term forecast is subject to considerable uncertainty.

Quantification of hand function by power grip and pinch strength force measurements in ulnar nerve lesion simulated by ulnar nerve block.

INTRODUCTION: In the assessment of hand and upper limb function, grip strength is of the major importance. The measurement by dynamometers has been established. PURPOSE OF THE STUDY: In this study, the effect of a simulated ulnar nerve lesion on different grip force measurements was evaluated. METHODS: In 25 healthy volunteers, grip force measurement was done by the JAMAR dynamometer (Fabrication Enterprises Inc, Irvington, NY) for power grip and by a pinch strength dynamometer for tip pinch strength, tripod grip, and key pinch strength. STUDY DESIGN: A within-subject research design was used in this prospective study. Each subject served as the control by preinjection measurements of grip and pinch strength. Subsequent measurements after ulnar nerve block were used to examine within-subject change. RESULTS: In power grip, there was a significant reduction of maximum grip force of 26.9% with ulnar nerve block compared with grip force without block (P < .0001). Larger reductions in pinch strength were observed with block: 57.5% in tip pinch strength (P < .0001), 61.0% in tripod grip (P < .0001), and 58.3% in key pinch strength (P < .0001). DISCUSSION: The effect of the distal ulnar nerve block on grip and pinch force could be confirmed. However, the assessment of other dimensions of hand strength as tip pinch, tripod pinch and key pinch had more relevance in demonstrating hand strength changes resulting from an distal ulnar nerve lesion. CONCLUSIONS: The measurement of tip pinch, tripod grip and key pinch can improve the follow-up in hand rehabilitation. LEVEL OF EVIDENCE: II.

Quantification of weakness caused by distal median nerve lesion by dynamometry.

INTRODUCTION: In the assessment of hand and upper limb function, grip strength is of major importance. Use of the JAMAR dynamometer has been an accepted test of grip strength and routinely part of the physical examination. PURPOSE OF THE STUDY: The aim of this study was to determine by means of a median nerve block simulating a patient group if the measurement of different types of grip force can improve the quantification of impairment of the hand beyond the sole power grip measurements. METHODS: In 29 healthy volunteers, grip force measurement was done by the JAMAR dynamometer for power grip and by a pinch grip dynamometer for pincer grip, precision grip, pinch grip, and palmar abduction. At the power grip, the force of digit 2-5 was measured separately by a sensor glove. For each measurement, 3 trials were recorded subsequently. STUDY DESIGN: A within-subject research design was used in this prospective study. Each subject served as the control by preinjection measurements of grip and pinch strength. Subsequent measurements after median nerve block were used to examine within-subject change. RESULTS: In power grip, there was no significant reduction of maximum grip force with median nerve block compared with grip force without block. By measuring the finger forces by a sensor glove, a reduction of force at the individual fingers was found compared with the setting with no block, although significant only at the middle finger (P < .017). With median nerve block, average grip force decreased significantly 20% in pincer grip (P < .021), 29.5% in pinch grip (P < .002), 39.5% in precision grip (P < .001), and 70.7% in palmar abduction (P < .013). CONCLUSIONS: These experiments suggest a minor role of the measurement of the power grip force in the diagnostics of distal median nerve block with the dynamometer, which could not be substantially improved by the digit forces and the force distribution of the individual fingers. The assessment of other grip forms, such as pincer grasp, precision grip, pinch grip, and especially palmar abduction, leads to a relevant improvement in the diagnostics of distal median nerve lesion. LEVEL OF EVIDENCE: II.

[Return to Work after Disk Surgery - Influenced by Rehabilitation?] / Erwerbsstatus nach einer Bandscheibenoperation: Was bewirkt eine Anschlussrehabilitation?

OBJECTIVE: The aim of this study was a comparison of treatment results in the year after disk surgery between the following treatment groups: rehabilitation immediately after discharge from hospital, rehabilitation with a transition time (at home) up to twenty days after rehabilitation or no rehabilitation. METHODS: On basis of claims data from a statutory health insurance and the German Federal Pension Fund the comparison of treatment results was performed. Therefore, duration of disability, return to work and early retirement are considered as treatment results and are analyzed using general linear models (GLM). Furthermore utilization of occupational rehabilitation was compared between the treatment groups with logistic regression. RESULTS: Rehabilitants showed a lower risk of unemployment. Moreover, rehabilitants utilize more often occupational rehabilitation. Both rehabilitation treatment groups had a higher duration of disability (including duration of rehabilitation) in the first quarter after surgery. Afterwards the duration of disability decreased faster. Risk of early retirement was higher in patients that started rehabilitation immediately. CONCLUSION: Rehabilitants tend to have better treatment results in the year following disc surgery.

[Early functional passive mobilization of flexor tendon injuries of the hand (zone 2) : Exercise with an exoskeleton compared to physical therapy]. / Die frühfunktionelle passive Mobilisation nach Beugesehnenverletzung (Zone 2) an der Hand : Beübung mit einem Exoskelett im Vergleich zur Physiotherapie.

BACKGROUND: These days there are different types of aftercare following flexor tendon injury. Patients in this study received a dynamic Kleinert protocol and additionally two different postoperative treatments. Both treatment groups were compared to each other and results were put into perspective when compared to other treatment options. METHODS: Sixty-two patients presenting with clean lesions of the two flexor tendons in zone 2 received postoperative treatment with a dynamic Kleinert protocol. Patients were randomly divided into either Group I (physical therapy) or Group II (exoskeleton). Range of motion was assessed after 6, 12 and 18 weeks. In addition, we measured the Strickland score and grip strength at the 18-week follow-up. DASH scores were obtained at weeks 12 and 18. RESULTS: Regardless of the received postoperative treatment, range of motion was predominantly limited in the proximal interphalangeal and distal interphalangeal joints after 6 weeks. This deficit decreased with time and almost full range of motion was achieved after 18 weeks. Grip strength measured 75% (Group I) and 78% (Group II) of the healthy hand's level. Good functional outcome was observed in the DASH scores after 12 weeks, which improved further, measuring 7.5 (Group I) and 6.8 (Group II) at the 18-week follow-up. We did not see any clinically relevant differences between the two patient groups. CONCLUSION: Regarding possible reruptures, the Kleinert protocol delivers a safe treatment regime. The possible disadvantage of flexion contractures with the Kleinert protocol was not seen in our measurements. Additional motion exercises using an exoskeleton delivered comparable results to classic physical therapy.

The effect of a combined thoracic and soft-tissue trauma on blood flow and tissue formation in fracture healing in rats.

INTRODUCTION: Previously, it was found that fracture healing is impaired by blunt chest trauma and an additional soft-tissue trauma. The mechanisms leading to this disturbance are largely unknown. Here, we investigated the effect of thoracic and soft-tissue trauma on blood flow of the injured lower leg and on tissue differentiation and callus formation during fracture healing. MATERIALS AND METHODS: Male Wistar rats received either a mid-shaft fracture of the tibia alone (group A), an additional chest trauma (group B), or additional chest and soft-tissue traumas (group C). Peripheral blood flow was determined by Laser Doppler Flowmetry before and after the injury, and on observation days 1, 3, 7, 14, and 28. Quantitative histological analysis was performed to assess callus size and composition. RESULTS: All groups displayed an initial decrease in blood flow during the first 3 days post-trauma. A recovery of the blood flow that even exceeded preoperative levels occurred in group A and later and to a lesser degree in group B, but not in group C. The amount of callus formation decreased with increasing trauma load. More cartilage was formed after 7 days in groups B and C than in group A. At later healing time points, callus composition did not differ significantly. CONCLUSIONS: An increasing injury burden causes a decreasing blood supply capacity and revascularization, and leads to impaired callus formation and an increasing delay in bone healing.

[Utilization of Rehabilitation after Disk Surgery - A Cross-Sectoral Analysis of Claims Data from Statutory Health Insurance and German Federal Pension Fund]. / Inanspruchnahme der Anschlussrehabilitation nach einer Bandscheibenoperation.

The aim of this study was to identify relevant factors that influence utilization and interim period between hospitalization and postoperative rehabilitation after disk surgery. Logistic regression was performed for utilization of an early postoperative rehabilitation and for an interim period, when patients were going to a rehabilitation facility (directly after hospitalization or after a period at home) on claims data from statutory pension insurance and statutory health insurance. Increased utilization of postoperative rehabilitation was found in older and German patients. Moreover, adiposity and additional physiotherapy in hospital increased the utilization of postoperative rehabilitation, while blood transfusion during hospitalization was an inhibiting factor.Female gender, older age and additional physiotherapy in hospital decreased the probability for an interim period between hospitalization and postoperative rehabilitation. However, the probability for an interim period increased from 2005 to 2010. Utilization and interim period between hospitalization and postoperative rehabilitation meet patient's needs and seem adequate. Nevertheless, there are indications for under-utilization of certain patient groups (foreign citizens, unemployed persons, male patients).

A prospective randomized controlled trial comparing occupational therapy with home-based exercises in conservative treatment of rotator cuff tears.

BACKGROUND: This pilot study evaluates the outcome after occupational therapy, compared to home-based exercises in the conservative treatment of patients with full thickness rotator cuff tears. METHODS: Forty-three adult subjects (range, 18-75 years), who had a full thickness rupture of the rotator cuff which was verified by magnetic imaging tomography, with clinical signs of a chronic rotator cuff impingement, and who were available for follow-up, were randomized to occupational therapy or to independent home-based exercises using a booklet. After drop-out, 38 patients were available for full examination at follow-up. Before therapy and after 2 months of conservative treatment, pain intensity, the Constant-Murley score, isokinetic strength testing in abduction and external rotation, functional limitation, clinical shoulder tests and health-related quality of life (EQ-5D) were evaluated. RESULTS: Two-thirds of the patients improved in clinical shoulder tests, regardless of the therapy group. There were no significant differences between the groups with reference to pain, range of motion, maximum peak force (abduction, external rotation), the Constant-Murley score, and the EQ-5D index. The only significant difference observed was the improvement in the self-assessed health- related quality of life (EQ-5D VAS) favoring home-based exercises. CONCLUSION: Home-based exercise, on the basis of an illustrated booklet with exercises twice a day, supplies comparable results to formal occupational therapy in the conservative treatment of rotator cuff tears. The results of this pilot study suggest some potential advantages related to psychological benefits using home-based treatment.

Influence of fracture type and surgeon experience on the emission of radiation in distal radius fractures.

INTRODUCTION: Ionising radiation is a potential risk for potentially exposed personnel. Only a few studies have examined the factors contributing to the emission of radiation in orthopaedic trauma procedures. We hypothesize that the experience of the surgeon and the fracture type influence the emission of radiation intraoperatively. METHODS: In a retrospective analysis, we examined 100 consecutive distal radius fractures receiving a volar plate osteosynthesis. The following parameters were documented: demographic data, plate system, fracture type, duration of the surgical procedure and duration of the emission of radiation, the experience level of the surgeon and the first assisting surgeon. RESULTS: Of all included patients (74 female), 48 had a type A, 7 a type B and 45 a type C fracture. The duration of radiation was longer for type C fractures [1.04 min (min)] in comparison to type A fractures (0.88 min) (P = 0.8152). In the type C subgroup, the highest amount of radiation was required for type C3 fractures (1.6 min), which was significantly more in comparison to type A (P = 0.0460) and type C1 fractures (P = 0.0089). The intraoperative emission of radiation (P = 0.00141) and the procedure time (P = 0.0006) depended on the experience of the surgical team. CONCLUSION: The emission of radiation during this procedure depends on the fracture type and the experience of the surgical team. Operating theatre personnel should be aware of the higher emission rates during the treatment of type C fractures and in teaching hospitals with inexperienced team members.

Non-inferiority of a hybrid outpatient rehabilitation: a randomized controlled trial (HIRE, DRKS00028770).

Background: Physiotherapeutic telerehabilitation in various musculoskeletal and internal diseases, including back pain, might be comparable to face-to-face rehabilitation or better than non-rehabilitation. In Germany, a standardized back school for patients with chronic back pain is provided in outpatient rehabilitation centers. The effectiveness of this standardized back school was shown in a randomized controlled trial in face-to-face rehabilitation. This study examines non-inferiority of a hybrid rehabilitation applying a digital version of the standardized back school against a rehabilitation applying the face-to-face back school. Methods/design: We recruit 320 patients in eight German outpatient rehabilitation centers. Patients are randomized equally to the intervention and control groups. Patients aged 18 to 65 years with back pain are included. Patients lacking a suitable private electronic device and German language skills are excluded. Both groups receive the standardized back school as part of the 3-week rehabilitation program. The control group receives the back school conventionally in face-to-face meetings within the outpatient rehabilitation center. The intervention group receives the back school online using a private electronic device. Besides the back school, the patients participate in rehabilitation programs according to the German rehabilitation guideline for patients with chronic back pain. Hence, the term "hybrid" rehabilitation for the intervention group is used. The back school consists of seven modules. We assess data at four time points: start of rehabilitation, end of rehabilitation, 3 months after the end of rehabilitation and, 12 months after the end of rehabilitation. The primary outcome is pain self-efficacy. Secondary outcomes are, amongst others, motivational self-efficacy, cognitive and behavioral pain management, and disorder and treatment knowledge. Guided interviews with patients, physicians, physiotherapists and other health experts supplement our study with qualitative data. Discussion/aim: Our randomized controlled trial aims to demonstrate non-inferiority of the online back school, compared to conventional implementation of the back school. Trial registration: German Clinical Trials Register (DRKS00028770, April 05, 2022). Supplementary Information: The online version contains supplementary material available at 10.1186/s44247-023-00013-4.

Biomechanical in vitro assessment of fixed angle plating using a new concept of locking for the treatment of osteoporotic proximal humerus fractures.

Locked plating attempts to improve mechanical stability via better anchorage of the screws in the bone. In 22 paired osteoporotic humeri an AO/ASIF 11-B 1 fracture was created. Locked and conventional plating using the same device of the latest generation was performed. Torsional loading around three axes (x = varus/valgus, y = flexion/extension, z = axial rotation) with an increasing moment (2, 3.5, 5 and 7.5 N·m) was applied. Interfragmentary motion within the locked group was lower for all three axes with higher cumulative survival rates (p < 0.05). The typical mode of failure was loss of fixation in the humeral head occurring earlier in the conventional group. The locking mechanism investigated provides more ultimate strength in an osteoporotic proximal humerus fracture model. Correlation with BMD suggests that this device may especially be suitable for use in osteoporotic bone.

The effect of both a thoracic trauma and a soft-tissue trauma on fracture healing in a rat model.

BACKGROUND AND PURPOSE: There is some clinical evidence that fracture healing is impaired in multiply injured patients. Nothing is known, however, about the effects of various types of injuries and their contribution to a possible disturbance of the fracture-healing process. We investigated the effect of a thoracic trauma and an additional soft-tissue trauma on fracture healing in a rat tibia model. METHODS: 3 groups of rats were operated: group A with a simple fracture of the tibia and fibula, group B with a fracture and an additional thoracic trauma, and group C with a fracture, thoracic trauma, and an additional soft-tissue trauma. The fracture and the soft-tissue injury were produced by a special guillotine-like device and the thoracic trauma by a blast wave generator. After one day, the serum level of IL-6 was quantified, and at the end of the study (28 days) the mechanical properties and the callus volume of the healed tibia were determined. RESULTS: Increasing the severity of the injury caused IL-6 levels to more than double 1 day after injury. It halved the load to failure in mechanical tests and led to reduced callus volume after 28 days of healing. INTERPRETATION: Fracture healing is impaired when additional thoracic trauma and soft tissue trauma occurs.

Effects of virtual reality-based neck-specific sensorimotor training in patients with chronic neck pain: A randomized controlled pilot trial.

OBJECTIVE: To evaluate the effects of neck-specific sensorimotor training using a virtual reality device compared with 2 standard rehabilitation programmes: with, and without general sensorimotor training, in patients with non-traumatic chronic neck pain. DESIGN: Pilot randomized control study. PATIENTS AND METHODS: A total of 51 participants were randomly assigned to 1 of 3 groups: 1: control group; 2: sensorimotor group; 3: virtual reality group. All 3 groups received the clinic's standard rehabilitation programme. Group 2 also received "general sensori-motor training" in the form of group therapy, for a total of 120 min. Group 3 received additional virtual reality-based "neck-specific sensorimotor training" for a total of 120 min. Participants' neck pain, head-aches, active cervical range of motion, and Neck Disability Index were determined before and after 3 weeks of intervention. RESULTS: Compared with the control group, the virtual reality group showed significant (p < 0.05) advantages in relief of headaches, and active cervical range of motion in flexion and extension. Com-pared with the sensorimotor group, the virtual reality group showed significant improvements in cervical extension. CONCLUSION: Virtual reality-based sensorimotor training may increase the effects of a standard rehabilitation programme for patients with non-traumatic chronic neck pain, especially active cervical range of motion in extension.

Can computer-assisted surgery reduce the effective dose for spinal fusion and sacroiliac screw insertion?

BACKGROUND: The increasing use of fluoroscopy-based surgical procedures and the associated exposure to radiation raise questions regarding potential risks for patients and operating room personnel. Computer-assisted technologies can help to reduce the emission of radiation; the effect on the patient's dose for the three-dimensional (3-D)-based technologies has not yet been evaluated. QUESTIONS/PURPOSES: We determined the effective and organ dose in dorsal spinal fusion and percutaneous transsacral screw stabilization during conventional fluoroscopy-assisted and computer-navigated procedures. PATIENTS AND METHODS: We recorded the dose and duration of radiation from fluoroscopy in 20 patients, with single vertebra fractures of the lumbar spine, who underwent posterior stabilization with and without the use of a navigation system and 20 patients with navigated percutaneous transsacral screw stabilization for sacroiliac joint injuries. For the conventional iliosacral joint operations, the duration of radiation was estimated retrospectively in two cases and further determined from the literature. Dose measurements were performed with a male phantom; the phantom was equipped with thermoluminescence dosimeters. RESULTS: The effective dose in conventional spine surgery using 2-D fluoroscopy was more than 12-fold greater than in navigated operations. For the sacroiliac joint, the effective dose was nearly fivefold greater for nonnavigated operations. CONCLUSION: Compared with conventional fluoroscopy, the patient's effective dose can be reduced by 3-D computer-assisted spinal and pelvic surgery. LEVEL OF EVIDENCE: Level II, therapeutic study. See Guidelines for Authors for a complete description of levels of evidence.