The Conservative Treatment of Traumatic Thoracolumbar Vertebral Fractures
A systematic review
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Background: The conservative treatment of traumatic thoracolumbar vertebral fractures is often not clearly defined.
Methods: This review is based on articles retrieved by a systematic search in the PubMed and Web of Science databases for publications up to February 2018 dealing with the conservative treatment of traumatic thoracolumbar vertebral fractures. The search initially yielded 3345 hits, of which 35 were suitable for use in this review.
Results: It can be concluded from the available original clinical research on the subject, including three randomized controlled trials (RCTs), that the primary diagnostic evaluation should be with plain x-rays, in the standing position if possible. If a fracture is suspected on the plain films, computed tomography (CT) is indicated. Magnetic resonance imaging (MRI) is additionally advisable if there is a burst fracture. The spinal deformity resulting from the fracture should be quantified in terms of the Cobb angle. The choice of a conservative or operative treatment strategy is based on the primary stability of the fracture, the degree of deformity, the presence or absence of disc injury, and the patient’s clinical state. Our analysis of the three RCTs implies that early functional therapy without a corset should be performed, although treatment in a corset may be appropriate to control pain. Follow-up x-rays should be obtained after mobilization and at one week, three weeks, six weeks, and twelve weeks.
Conclusion: Further comparative studies of the indications for surgery and specific conservative treatment modalities would be desirable.
Every year, an estimated 8000 severe fractures of the thoracic and the lumbar spine occur in Germany (1). In more than two-thirds of these cases, the thoracolumbar junction, i.e. the thoracic vertebral bodies T11/T12 or the lumbar vertebral bodies L1/L2 are affected (2). For the classification of the various types of fracture, the AOSpine classification of the AO Foundation (Arbeitsgemeinschaft Osteosynthese) has become the established standard (3). It differentiates between compression fractures (Type A), flexion-distraction fractures (Type B), and the highly unstable displaced fractures (Type C) (Table 1). Complete paraplegia was observed in 2% and incomplete neurological deficits in 11% of patients with type-A fractures (2).
The indications for conservative and surgical management remain the subject of international controversy (4, 5). Box 1 provides a summary of the treatment recommendations of the Spine Working Group of the German Society for Orthopedics and Trauma (DGOU, Deutsche Gesellschaft für Orthopädie und Unfallchirurgie) (4). Overall, a conservative treatment strategy can be applied in many cases with promising long-term outcomes (6, 7). However, the type of conservative treatment is usually poorly defined. This applies to both the intensity and type of the therapeutic measures and the timing of the clinical and radiographic follow-ups (5, 8).
The aim of this review, which was initiated by the committee for conservative spine treatment of the German Spine Society (DWG, Deutsche Wirbelsäulengesellschaft), is to systematically screen the literature for content related to conservative management. From this, the current state of evidence shall be described for a standardized conservative treatment of traumatic vertebral fractures of the thoracic and lumbar spine. Based on these results, prospective studies could be created to increase the evidence in this field and to produce data that can be used to further scientifically support the therapeutic strategy.
Materials and methods
The literature search included recent vertebral fractures (<4 weeks) of the thoracic and lumbar spine of adults with adequate trauma history and without neurological deficits. Children and adolescents (age <18 years) and the elderly (age >65 years) with likely concomitant osteopenia/osteoporosis are not within the scope of this review and need to be analyzed separately. Furthermore, patients with fractures after non-adequate trauma (trivial falls from tripping) are not included in this review.
A systematic search of the literature was performed by two of the authors (UJS, C-EH), including all articles until 2/2/2018. In each case, the two databases PubMed and Web of Science Core Collection were considered and searched. Since data collection had already been completed at the time of PROSPERO registration, this review could not be registered with PROSPERO. Using the PICO scheme (9), the following review questions were defined:
- Do patients with non-osteoporotic traumatic thoracolumbar vertebral fractures achieve better clinical outcomes after operative treatment or conservative treatment?
- Is it possible to recommend some treatments more than others?
The following search terms were used: (“vertebral body fracture” OR “vertebral fracture” OR “spine fracture” OR “lumbar spine fracture” OR “thoracic spine fracture”) AND (“nonoperative treatment” OR “conservative treatment” OR “orthosis” OR “brace” OR “physiotherapy” OR “analgesia” OR “radiography”) AND (“English” OR “German”) NOT “case reports” NOT “reviews” NOT “osteoporosis” NOT “osteoporotic” NOT “cervical” NOT “sacral” NOT “odontoid”.
Subsequently, all relevant original articles were analyzed based on their levels of evidence and their appropriate conclusions. Here, the following topic areas were defined:
- Diagnostic assessment of vertebral fractures (primary diagnosis and follow-ups)
- Pharmacological treatment
- Non-pharmacological treatments
- Alternative medicine treatments.
Results and discussion
Altogether, 3345 abstracts were retrieved from the literature search (Figure). Of these, 3170 articles were excluded based on abstract or title. Most of the excluded studies were animal experimental or biomechanical studies or articles which were not original articles or investigated other pathologies or exclusively evaluated surgical procedures or fractures in the elderly. Altogether, 175 articles were read completely. Of these, further 140 articles were excluded because the conservative treatment provided was not adequately defined or because conservative methods were used that are no longer up to date (for example, bed rest for several weeks). Altogether, 3310 articles were excluded (Figure). Levels of evidence were defined as described by Bassler and Antes (10) (Box 2). All 35 remaining original articles, which covered the period from 1969 to 2018, are summarized in Table 2.
High-velocity trauma patients should undergo a polytrauma spiral computed tomography (CT) scan, covering the entire spine, as recommended by the clinical Guideline on the Treatment of Polytrauma/Severe Injuries (11) of the Association of Scientific Medical Societies in Germany (AWMF, Arbeitsgemeinschaft der Wissenschaftlichen Medizinischen Fachgesellschaften). Clinical examination alone cannot conclusively rule out fractures (12, 13). In patients who sustained injuries during lower-velocity type accidents, conventional 2-view radiographs are indicated, subject to the clinical findings. If not too painful, these radiographs should be obtained in a standing position so that the true extent of the kyphotic deformity can be assessed. Mehta et al. (14) demonstrated a relevant increase in bisegmental kyphosis angles (sagittal Cobb angle) on standing radiographs compared to supine radiographs. The bisegmental kyphosis angle was on standing radiographs on average 7° larger compared to supine films. When evaluating local kyphosis, preference should be given to the bisegmental kyphosis angle determined on conventional radiographs, as it offers the best interobserver agreement and predictive value (15–18). Local post-traumatic kyphosis of more than 20° is frequently associated with posterior ligamentous complex injury (19). In case a vertebral fracture was detected or could not be reliably ruled out, an additional computed tomography (CT) scan of the suspicious segment should be obtained (20–22). In fractures of the spine, the diagnostic performance of low-dose CT was found to be comparable to that of standard-dose CT, with a considerable reduction in radiation dose (23).
Magnetic resonance imaging (MRI) is recommended to accurately assess injury severity in burst fractures, in particular to correctly assess the posterior ligamentous complex (PLC) and intervertebral disc lesions (24–31). Pizones et al. (24) reported that an injury to the posterior ligamentous complex can be detected with a sensitivity of 91% and a specificity of 100%. Besides providing insight into the status of the posterior ligamentous complex and ruling out potential intervertebral disc damage, MRI allows to assess the extent of intervertebral disc injury (31). By contrast, Vaccaro et al. (29) found a lower sensitivity (range, depending on anatomical structure: 79–91%) and specificity (range: 38–67%), but nevertheless recommended MRI to complement the clinical findings as well as findings of other radiographic investigations to rule out or confirm a lesion of the posterior portion of the spine. Furthermore, the following risk factors for secondary sintering after conservative treatment were identified based on MRI findings:
- Lesion of the anterior longitudinal ligament
- Cranial endplate lesions with involvement of the intervertebral disc
- Marked vertebral body edema (32).
Furthermore, secondary loss of regional sagittal alignment was largely attributable to the intervertebral disc (33, 34). Complementing standard MRI sequences, susceptibility-weighted MRI allowed improved fracture detection not only of recent fractures, but also and especially of non-healed fractures (33).
Thus, accurate evaluation of injury severity can only be done after complete diagnostic work-up. This might include additional MRI to identify relevant intervertebral disc injuries and to distinguish between type A and type B injuries.
The available evidence is insufficient to draw conclusions about the need for and significance of special radiographs, such as hypomochlion radiographs (lateral radiograph in supine position with a roll, serving as a hypomochlion, below the vertebral body to be assessed in order to determine the flexibility and stability in the affected segment of the spine), flexion and extension views, and whole-spine radiographs; consequently, these special investigations are only performed in individual cases. For example, hypomochlion radiographs can be indicated during the first four weeks in patients with regional sagittal kyphosis of more than 10° to 15° to determine the potential for correction.
By contrast, functional radiographs play a role especially in the evaluation of the stability of fractures of the upper and middle cervical spine. Whole-spine radiographs are indicated particularly in patients with serial vertebral fractures or pre-existing deformities and degenerative changes (35).
Regional conventional standing 2-view radiographs should be obtained for radiographic follow-up. With regard to the timing of follow-up examinations, the available evidence is scarce. However, Shen et al. (36) demonstrated a high rate of treatment failure (19%) in type A fractures without neurological deficits. They identified increased posttraumatic interpedicular distances between two vertebral bodies on anterior–posterior radiographs and severe initial pain as risk factors for failure of treatment and recommended clinical and radiographic follow-ups at close intervals for patients undergoing conservative treatment. Overall, secondary sintering can be expected to occur over a period of at least 3 months (37, 38). Interestingly, sponenous reduction of fracture-related spinal stenosis of almost 10% was seen in patients who underwent conservative treatment (39).
The available evidence does not allow to draw a conclusive recommendation regarding the best timing of radiographic follow-ups. In our view, follow-up radiographs should be obtained after primary mobilization (3–4 days), after 1, 3, 6 and 12 weeks as well as with any increase in symptoms, in keeping with the recommendation for conservatively treated extremity fractures. The radiographic work-up is summarized in Box 3.
Aids and orthoses
Three randomized controlled trials evaluated the need for adjunctive orthotic treatment; thus, for this question the highest level of evidence is available among the investigated questions related to conservative fracture management (40, e1, e2). Bailey et al. (40) used the following inclusion criteria: recent burst fractures of the type A3/A4 of thoracic vertebra 10 (T10) to lumbar vertebra 2 (L2), bisegmental kyphosis lower than 35° and age between 18 and 60 years. The patients were randomly assigned to the treatment groups, 47 without orthosis and 49 with orthosis. The corset orthosis was worn for 10 weeks. The primary outcome parameter was the Roland Morris Disability Questionnaire (RMDQ) assessed at 3 months after the injury (e3). Secondary outcome parameters included the SF-36 score, VAS (visual analog scale) pain score, patient satisfaction, and bisegmental kyphosis at weeks 6 and 12 as well as months 6, 12 and 24. The follow-up rates were 95% after 3 months, 85% after 1 year and 70% after 2 years. No statistically significant differences were found between the two treatment groups, neither for the primary nor for the secondary outcome parameters, at any point in time during the follow-up period.
Stadhouder et al. (e1) included patients with recent compression fractures (A1–A4) with <50% loss of height of the anterior column and <30% stenosis of the spinal canal of the entire thoracic and lumbar spine, and conservative treatment. The age limits were 18 and 80 years. The primary outcome parameter was the bisegmental kyphosis angle. The secondary outcome parameters were the VAS pain score and the Oswestry Disability Index (ODI) (e4). Follow-up visits were scheduled at 6 and 12 weeks, 6 and 12 months, and at least 2 years after the injury. Altogether, 133 patients were included. Of these, 29 were treated with physiotherapy alone, 38 plus a corset orthosis, 27 and 39 patients plus a plaster of Paris cast for 6 and 12 weeks, respectively. The follow-up rate at the time of the last follow-up visit, which occurred after 7 years on average, was 75%. Overall, no differences were found for the primary outcome parameter, the sagittal alignment, between any of the treatment groups. Management without corset orthosis was perceived as the most convenient treatment. Patient treated with a plaster of Paris cast experienced clinical disadvantages compared to the other treatment groups. In addition, a minor, but statistically significant reduction in spine-associated limitations was found for the orthosis group compared to the group without orthosis. A critical point, however, is the inclusion age of 80 years, as it implies that most likely patients with osteoporotic fractures were included in the study. This view is supported by the finding that some patients sustained fractures as the result of low-velocity traumas. This point is very relevant because, in contrast to patients with normal bone density, it is assumed that patients undergoing conservative treatment for osteoporotic vertebral fractures benefit from corset treatment due to a muscle-stimulating effect potentially associated with wearing the orthosis (e5).
Shamji et. al. (e2) reported about patients with recent A3 or A4 fractures of T10 to L4. The primary outcome parameter was the bisegmental kyphosis angle at 6 months follow-up. Secondary outcome parameters were the VAS pain score, ODI score and SF-36 score at 6 months follow-up. Altogether, 23 patients were included. All 23 patients were re-evaluated at 6 months follow-up. Looking at all outcome parameters, no statistically significant or clinically relevant differences were found between patients with and without orthosis.
In summary, based on the available evidence, orthotic treatment is not indicated as part of the conservative management of fractures of the thoracic and lumbar spine in patients with normal bone density. However, in individual cases, treatment with a corset orthosis can be a beneficial component of conservative fracture management due to its analgesic effect. Further randomized multicenter studies with selective inclusion of traumatic fractures and comparable types of fracture are needed to re-evaluate the usefulness of orthotic treatment. Here, sub-analyses of matched-pair data taking into account fracture type and fracture location would be advantageous.
Physiotherapy and manual therapy
The need for adjunctive physiotherapy is generally emphasized, but studies comparing specific types of treatment have not been performed. Even widely recognized aftercare recommendations provide no explicit information about the frequency of treatment and specific types of treatment (e8, e9).
In summary, no evidence-based studies evaluating the indication for and efficacy of adjunctive treatments in patients with vertebral fractures of the thoracic or lumbar spine are available. Nevertheless, there are some interesting aspects which could be adopted, although with reservation. For example, Cha et al. (e10) found in their prospective randomized study that in patients with osteoporotic vertebral fractures the complication rate is significantly lower if adjunctive physiotherapy is started early—with comparable degrees of pain and similar secondary sintering. From this finding for osteoporotic fractures it can be concluded that a similar positive effect of starting adjunctive physiotherapy at an early point can be expected for non-osteoporotic fractures as well. In addition, early functional treatment significantly reduced the length of inpatient stay without negative effects on alignment (e11–e13). Here, isometric training appears to result in an increase in muscle size comparable to that achieved with flexion exercises, while offering the advantage of less forces acting on the fracture (e14).
With little evidence available, there is no indication for manual therapy in the management of recent fractures.
Likewise, there is a lack of evidence regarding the usefulness of physical therapy, such as hot and cold applications, ultrasound, electrotherapy, and alternative types of treatment, such as magnetic field therapy and acupuncture.
Very little evidence is available with regard to the management of pain in patients with non-osteoporotic vertebral fractures. Our systematic search of the literature identified no article dealing with the aspect of analgesic treatment which could be included in this review. Consequently, it is not possible to make any systematic review–based recommendations for a specific analgesic treatment as a component of the conservative management of traumatic vertebral fractures of the thoracic and lumbar spine.
Therefore, we recommend—taking patient age, concomitant diseases and contraindications into account—to follow the pharmacological pain management for osteoporotic vertebral fractures (e15) and the World Health Organization’s (WHO) three-step Pain Relief Ladder (Box 4) (e16) when providing pharmacological pain relief to this patient population.
Non-opioid analgesics (NOPA)
This group includes nonsteroidal anti-inflammatory drugs (NSAIDs), coxibs and metamizole (Step 1, WHO Pain Relief Ladder). Because of their anti-inflammatory potential, initially drugs of the NSAID group are selected. In case of intolerance or contraindications, the off-label use of coxibs may be considered. Data on the use of metamizole is still scarce, even though the substance has been administered over decades, especially in Germany, and proven its effectiveness for pain relief (e17).
In patients with severe pain or inadequate response to NOPAs, weak opioid analgesics (tramadol, tilidine/naloxone; Step 2, WHO Pain Relief Ladder) can be used in addition (e15). In order to reduce the risk of addiction, the use of sustained-release formulations, administered according to a fixed schedule, is advisable (e18).
In patients with persisting or increasing severe pain, the use of strong opioids may be considered (Step 3, WHO Pain Relief Ladder). All opioids share a sedating effect, which, in combination with dizziness, may increase the risk of falling.
Muscle relaxants, in combination with other analgesics, can be used as an adjuvant in pain management to facilitate opioid weaning. Due to their side-effect profile, muscle relaxants should not be used for longer than 2 weeks (e19).
The available evidence on the conservative treatment of traumatic vertebral fractures of the thoracic and lumbar spine is scant. In the future, further studies in all areas of conservative fracture treatment are urgently needed and considered highly desirable. This includes prospective comparative studies on
- Physiotherapeutic strategies, such as density and contents of treatments
- Duration and extent of restrictions (lifting heavy loads)
- Types of analgesia and their advantages and disadvantages
- Timing and frequency of follow-up radiographs with regard to potential therapeutic consequences.
Conflict of interest statement
Prof. Heyde received consulting fees from Medacta International. Furthermore, he received funding in a third-party funding account from Medacta International.
Prof. Delank, Dr. Fischer, Dr. Schmidt, Prof. Josten, Dr. Schnoor, Prof. Schulte, and Dr. Spiegl declare that no conflict of interest exists.
Manuscript received on 15 May 2018; revised version accepted on 5 September 2018
Translated from the original German by Ralf Thoene, MD.
PD Dr. med. Ulrich J. Spiegl
Klinik für Orthopädie, Unfallchirurgie und Plastische Chirurgie
Liebigstraße 20, 04103 Leipzig, Germany
For eReferences please refer to:
Department of Physical and Rehabilitation Medicine, BG Hospital Bergmannstrost, Halle, Germany: Dr. med. Klaus Fischer
Reha Assist Deutschland GmbH, Berlin, Germany: Dr. med. Jörg Schmidt
Collm Klinik Oschatz GmbH, Oschatz, Germany: PD Dr. med. Jörg Schnoor
Department of Orthopedic, Trauma and Reconstructive Surgery, University Hospital of Halle, Halle, Germany: Prof. Dr. med. Stefan Delank
Department of General Orthopedic and Spine Surgery, St. Josef-Hospital Bochum, University Hospital of the Ruhr University of Bochum, Bochum, Germany: Prof. Dr. med. Tobias Schulte
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Early corset reclination of uncomplicated type А3 comminuted vertebral fractures in the thoracolumbar spineHirurgiâ pozvonočnika (Spine Surgery), 202010.14531/ss2020.2.58-63