Ideal Insertion Point and Angle of Cervical Pedicular Screws in Korean

STUDY DESIGN: A retrospective study. OBJECTIVES: Using computed tomography, it is to measure pedicle size of lower cervical spine in Koreas to find ideal insertion point and angle in fixating pedicular screws. SUMMARY OF LITERATURE REVIEW: Although techniques in pedicular screw fixation and pedicle's anatomical shape in foreign populations have been well documented and studied, no anatomical study on lower cervical pedicle in Korean population has been reported. MATERIALS AND METHODS: A total of 180 patients with computed tomography taken at our institution were selected for the study. Width, total length, and length of pedicle, insertion point and angle, and safe insertion angles were measured on axial view. On sagittal view, height of pedicle, insertion point and angle, and safe insertion angles were determined. RESULTS: Mean height of study subject was 164.2cm. Mean width of pedicle was 5.5mm, mean height 7.2mm, mean total length 31.2mm, and mean length 14.8mm. Mean insertion point from 3rd to 7th cervical spines was medially 3.3mm from lateral mass and downward 4.7mm from margin of upper facet. Mean insertion angles from 3rd to 7th cervical spines were 41.6degrees axially and 6.4degrees sagittally. Calculated safe insertion angles were 8degrees on medial and lateral sides and 14degrees on superior and inferior sides. CONCLUSIONS: Using computed tomography images, ideal insertion point and angle were measured for pedicular screw insertion, but, due to individual variation, preoperative measurement of insertion point and angle on computed tomography is necessary.

Non-traumatic Atlanto-axial Rotatory Subluxation: A Case Report

STUDY DESIGN: A case report. OBJECTIVES: To report a case of diagnostic, clinical and radiologic follow-up of a non-traumatic atlanto-axial rotatory subluxation. SUMMARY OF LITERATURE REVIEW: Atlanto-axial rotatory subluxation, caused by a non-traumatic inflammation or infectious diseases, has been branded as "Grisel's syndrome". However, the pathophysiology of the syndrome has not been clearly understood, and its diagnostic criteria and appropriate treatment plans are not established. MATERIALS AND METHODS: The patient suffering from antlanto-axial subluxation without any neurological symptoms was treated with halter traction and Miami J brace. RESULTS: The patient maintained a normal reduction state, and a normal cervical movement was observed after undergoing 4 weeks of non-surgical treatment. CONCLUSION: Early detection and treatment are essential and critical in avoiding catastrophic outcomes. It requires a combination of clinical assessment and appropriate radiographic imaging.

The Changes in Neural Foramen Shown on Computed Tomography Depending on the Changes in the Height of Intervertebral Disc after Anterior Cervical Discectomy and Fusion (ACDF)

STUDY DESIGN: A prospective radiological assessment. OBJECTIVES: Changes in the height, area, and width--captured using computed tomography (CT)--of the neural foramen with respect to changes in the intervertebral disc height, after undergoing an anterior cervical disc removal and fusion procedure. SUMMARY OF LITERATURE REVIEW: The multiple authors of this study, by obtaining central canal and area of neural foramen by increasing the disc spacing height and area of the neural foramen, attempted to assess the height increase of disc spacing. It is necessary to consider the synergistic effects of decompression through dissection of the posterior longitudinal ligament (PLL). MATERIALS AND METHODS: The authors studied 17 patient cases that underwent one segment anterior cervical discectomy and fusion (ACDF) for degenerative cervical disease from June 2006 to March 2007. All patient cases underwent autogenous iliac bone graft or cage insertion with plate fixation procedure. We measured the areas of the neural foramen, heights of the vertebra body above and below the removed intervertebral disc with CT before and after ACDF. Radiographic measurements were averaged. RESULTS: Among the 17 cases, the height of the cervical disc increased in 15 cases and decreased in 2 cases. The heights of the neural foramen increased in 19 cases and showed no changes in 13 cases. The areas of the neural foramen increased in 23 cases and decreased in 6 cases. The heights of vertebral body above and below the removed disc increased by 5.4% (p=0.734), and the heights of the neural foramen increased by 13.3% (p=0.002). The area of the neural foramen increased by 13.6% (p=0.192). The widths of the neural foramen increased by 2.3% (p=0.586). The intervertebral disc height, neural foramen height, and neural foramen area increased by 39.6%, 8.4%, and 17.9%, respectively, after a 2mm lengthening of bone transplant. The intervertebral disc height, neural foramen height, and neural foramen area increased by 59.8%, 22.9%, and 10.3%, respectively, after a 3mm lengthening of bone transplant. The height and area of neural foramen increased by 18.3% and 18.2%, respectively, after the PLL removal and dissection. CONCLUSIONS: The follow-up observations of the intervertebral disc height, neural foramen height, and neural foramen area showed increases after one segment ACDF in cervical disease cases, when compared to the preoperative radiographic findings. As the height of bone transplant increased, the intervertebral disc height, neural foramen height, and neural foramen area increased. The neural foramen height and neural foramen area significantly increased, when PLL was dissected.

Efficiency of Implant Removal for Treatment of the Thoraco-lumbar Unstable Fractures: Multi Segments Fixation, Single Segment Fusion

STUDY DESIGN: A retrospective study. OBJECTIVES: To evaluate the safety and usefulness of implant removal based on fusion by radiological change analyses and non-fused segment motion angle after open reduction, multi-segment fixation, and single segment fusion. SUMMARY OF LITERATURE REVIEW: There have been reports that discuss possible fracture of fixator, loss of reduction, or failure of fixation in certain cases of single segment fixation consistent with thoracolumbar fracture. MATERIALS AND METHODS: We analyzed 83 patients who had undergone treatment by fixation of the top 2 segments and the bottom segment. The posterolateral fusions were performed for the top segment for thoracolumbar fractures. The mean follow-up was 21.3 months. Wedge and local kyphotic angles, anterior, and posterior heights of the vertebral body were measured on plain radiograph. The range of motion of each segment was recorded by flexion-extension lateral radiographs at 6 month after the removal of implants. RESULTS: Radiologic assessments performed on 83 patients demonstrated preoperative mean wedge angle, kyphotic angle, mean anterior body height of 20.1degrees, 18.5degrees and 62.0%, respectively, and, postoperatively, these were corrected by 9.0degrees, 9.3degrees and 24.6%, respectively. In the 44 cases that had the implants removed, the correction losses were 0.4degrees(P=0.258) and 3.7degrees(P=0.000), 0.5%(P=0.756), and at the last follow-up, compared to measurements prior to the removal. There was no statistical significance in wedge angle or anterior body height. The range of motion measured on the non-fused segment was 3.9degrees on average at 6-months after the hardware removal. CONCLUSIONS: The multi-segments fixation and single-segment fusion for the thoracolumbar fracture can preserve correction and the motion of non-fusion segment. Although the implant removal after union can sustain motion, further studies regarding degenerative change of the non-fused segment are necessary.

Efficiency of Anterior Interbody Fusion using Cage Packed with DBM in the Distractive Flexion Injury of Cervical Spine: Demineralized Bone Matrix vs Autoiliac Cancellous Bone

STUDY DESIGN: This is a retrospective study. OBJECTIVES: We wanted to evaluate the effectiveness and safety of a PEEK cage filled with DBM in patients with a distractive flexion injury of the cervical spine. SUMMARY OF LITERATURE REVIEW: AIF of the cervical spine using an autoiliac bone graft and plate fixation is known to be an effective treatment for traumatic injuries. However, the complications arising from the donor site are troublesome, and so fusion with cage is an alternative treatment. MATERIALS AND METHODS: We analyzed 32 cases (22 males and 10 females) with distractive flexion injury of the cervical spine. They underwent anterior decompression and interbody fusion with a PEEK cage and anterior plate fixation. In 18 patients, the cage was filled with autogenous iliac bone (Group I), and for the other 10 the cages were filled with DBM (Group II). RESULTS: All the cases in Group I and Group II achieved fusion except for one case of nonunion in group II. The anterior and posterior vertebral heights of the fused segments of group II were decreased more than those of group I, resulting a statistical difference (p=0.003). The changes of segmental lordosis (p=0.69) and the neurologic status (p=0.22) showed no statistical difference between the two groups. CONCLUSIONS: AIF using a PEEK cage filled with DBM and plate fixation showed no significant clinical differences compared to the case of iliac bone autografting. However, from a radiologic perspective, the time to achieve union was extensive and a case of nonunion was also observed. Therefore, many considerations are necessary when using DBM as a replacement for iliac bone autografting and further research should be done on this subject.

Efficiency of Anterior Interbody Fusion using Cage and Plate in the Distractive Flexion Injury of Cervical Spine : Cage vs Tricortical Autoiliac Bone / 대한척추외과학회지

STUDY DESIGN: This is a retrospective study OBJECTIVES: We wanted to evaluate the effectiveness and safety of anterior interbody fusion (AIF) using cage and plate fixation for treating distractive flexion injury of the cervical spine according to the radiological and clinical outcomes. SUMMARY OF THE LITERATURE REVIEW: AIF of the cervical spine using autoiliac bone and plate fixation is known as an effective method for treating not only degenerative disease, but also trauma as well. However, the problem lies in the complications that occur at the donor site. To avoid these complications, the fusion method using a cage is becoming more frequently used, but there are not many reports on using a cage and plate for treating trauma in the cervical spine. MATERIALS AND METHODS: We retrospectively analyzed 47 patients with distractive flexion injury of the cervical spine and who underwent anterior decompression and interbody fusion with a autoiliac bone graft and plate fixation (Group I, 32 patients) or who underwent anterior decompression and interbody fusion with cage and plate fixation (Group II, 15 patients). We statistically analyzed the changes of the segmental lordosis, the fused segmental body height, the fusion rate on plain radiography and the neurologic recovery with using an ASIA scoring system. RESULTS: All the cases were fused by 12.6+/-2.5weeks after operation. The changes of segmental lordosis shows no statistical difference between the two groups (p=0.69). The anterior and posterior vertebral heights of the fused segments of Group I were more decreased than those of Group II, and there was a statistical difference between the two groups (p=0.03, 0.04). The initial and last follow up neurologic statuses were not statistically difference between the two groups (p=0.11) CONCLUSIONS: For the treatment of fracture-dislocation injury in the cervical spine, AIF using a PEEK cage filled with autoiliac bone and plate fixation is an effective method with the least possibility of complications at the donor site, and at the same time, this surgical method shows equally satisfactory results, both radiologically and clinically, as fusion with using a tricortical autoiliac bone graft.

Cervical Spondylolysis with Dysplasia: A Case Report / 대한척추외과학회지

Cervical spondylolysis is defined as a corticated cleft between the superior and inferior articular facets of the articular pillar, which is the cervical equivalent of pars interarticularis in the lumbar spine. It is very important to avoid confusion with more clinically significant abnormalities, such as fracture or dislocation. This case report describes bilateral spondylolysis and associated dysplasia of C6. We describe the radiographic presentation of this anomaly, stressing the importance of computed tomography and magnetic resonance imaging for a correct diagnosis. A review of the literature on this interesting abnormality and a complete differential diagnosis are presented.

Diagnosis and Prognosis of Adult Post-traumatic Cervical Cord Injury Without Radiographic Evidence of Trauma Using Magnetic Resonance Imaging / 대한척추외과학회지

STUDY DESIGN: This is a retrospective review of 10 consecutive patients with spinal cord injury without radiographic evidence of abnormalities (SCIWORA) and 17 spinal cord injury patients without radiographic evidence of trauma (SCIWORET). OBJECTIVES: We wanted to assess the MRI and clinical findings, the prognosis and effect of anterior decompression of the spinal cord in SCIWORET patients. SUMMARY OF THE LITERATURE REVIEW: SCIWORET is not uncommon among middle-age and elderly people. It is less reported in adults as compared with children. There are no studies on the method for the treatment or the effectiveness of anterior decompression of the spinal cord. MATERIALS AND METHODS: From February 1994 to December 2005, this study included 27 patients who had cervical spinal cord injury without radiographic evidence of trauma on the plain roentgenography and MRI. Ten patients had no spinal cord compression (SCIWORA patients, group 1) and 17 had their spinal cord compressed from the anterior (SCIWORET patients, group 2), We conservatively treated the group 1 patients and 10 of the group 2 patients, and anterior decompression and fusion were done for 7 of the group 2 patients. Neurological evaluation was performed initial and at last follow up using an ASIA motor score and the Frankel grade. RESULTS: The patients who had spinal cord edema on MRI had a better prognosis than those who had contusion (p=0.06). There is no statistical difference between the two groups for the neurologic changes at the initial period and the last follow up period (p=0.06, 0.61). Decompression of the spinal cord anteriorly was not effective for the neurologic recovery (p=0.25) and the involved segments were not related to the neurologic changes (p=0.34, 0.25). CONCLUSIONS: It was presumed that patients with edema of the spinal cord had a better prognosis than those with contusion of the spinal cord. There was no difference between the SCIWORA and SCIWORET groups for the neurologic changes and anterior decompression was not effective for the recovery of neurologic symptoms. This study was limited by its retrospective nature and the small number of patients, so a multi-center study is needed.

Upper Cervical Spine Injury / 대한척추외과학회지

Upper cervical spine injuries, including atlantooccipital articulation, are being recognized more commonly and there is an increasing number of reports of patients surviving with injuries previously thought to be fatal. The bony elements of the upper cervical spine consist of the occiput, atlas and axis. The nature of their articulations provides no inherent stability, but rather relies on ligaments to maintain the structural integrity. Some upper cervical injuries, occipitocervical injuries, and isolated midsubstance transverse ligament ruptures, are usually unstable and frequently result in neurological injury or death. Therefore, these injuries warrant early instrumented posterior arthrodesis. Most upper cervical spine injuries can be treated non-surgically and heal readily. Implementation of a diagnostic algorithm consisting of screening parameters gathered from the plain radiographs as well as routine CT and MRI scans in high risk patients should reduce the occurrence of missed injuries.

Anterior Decompression and Fusion in the Treatment of Single-level Cervical Disc Herniation: Plate Fixation vs Cage / 대한척추외과학회지

STUDY DESIGN: This is a retrospective study. OBJECTIVES: We analyzed the radiological and clinical results to verify the efficacy of anterior interbody fusion with using cages gradually increases in the treatment of cervical radiculopathy. SUMMARY OF LITERATURE REVIEW: Anterior cervical decompression and fusion is well accepted treatments for cervical radiculopathy. Performing anterior interbody fusion using cages has recently gradually increased to minimize the extent of surgery. While there are numerous reports on the primary stabilizing effects of the cervical cages, little is known about the subsidence behavior of such cages in vivo. MATERIALS AND METHODS: We retrospectively analyzed 38 patients with cervical disc herniation who underwent anterior decompression and interbody fusion with autoiliac bone graft and plate fixation (Group I, 21 patients) or who underwent with standalone cage (Group II, 17 patients). We statistically analyzed the changes of the cervical lordosis, the segmental lordosis, the vertebral body height, the fusion rate on the plain x-ray and the clinical results with using a pain visual analogue scale. RESULTS: All the cases were fused by 11.2+/-2.7 weeks after operation. The changes of the cervical lordosis and segmental lordosis show no statistically significant difference between the two groups (p=0.07, 0.66). The anterior and posterior vertebral heights of the fused segments of group II were more decreased than those of group I, but there was no statistically difference between the two groups (p=0.06, 0.30). The clinical results were not statistically difference between the two groups (p=0.64, 0.45). CONCLUSIONS: Implantation of autoiliac cancellous bone impacted stand-alone cages or on a tricortical iliac crest autograft after anterior decompression was safe and reliable options for the treatment of cervical disc herniation that causes single level radiculopathy. Both procedures produced equally satisfying clinical and radiological results, leading to a high fusion rate and they maintained the intervertebral height.

Spinal Cord Injury without Radiographic Abnormality in Adults / 대한척추외과학회지

STUDY DESIGN: This is a retrospective study. OBJECTIVES: This study examined the MRI findings, injury mechanism, clinical findings, and prognosis of a spinal cord injury without radiographic abnormality (SCIWORA) in adults with a normal spinal canal. SUMMARY OF LITERTURE: Most reports on SCIWORA deal with the pediatric age group. However, there are few reports on the MRI findings, clinical features and outcomes in adult patients with cervical SCIWORA. MATERIALS AND METHODS: The hospital records of 753 patients, who were treated for cervical spine injury between February 1, 1994 and July 31, 2004, were reviewed. This study included the 10 subjects with no fractures or dislocation on the plain roentgenograms or cord compression caused by degenerative change or disc herniation on MRI corresponding to the location of the cord lesion. All the patients had at least a 2-year follow-up evaluation. The relationships between the MRI findings, neurological findings and outcomes were evaluated. RESULTS: The MRI findings revealed 7 cases with cord contusion, 3 cases with cord edema, 3 cases with gliosis and 3 cases with syrinx formation at the follow-up. The injury mechanism was hyperextension and hyperflexion in 7 and 3 cases, respectively. The initial motor function scores of ASIA in the edema and contusion groups was 60.7 and 43.9, respectively. At the last follow-up, the motor function scores of ASIA in the edema and contusion groups were 90 and 70.3, respectively. The Frankel grade improved by 1.3 and 1.1 in the edema and contusion groups, respectively. CONCLUSIONS: In patients with SCIWORA, the MRI findings correlated well with the clinical picture and were of prognostic significance. The cord edema group showed better clinical features than the contusion group, and prognosis was relatively good in both groups. A further careful evaluation, such as MRI, is still needed to determine the appropriate treatment for spinal cord injuries without radiographic abnormalities.

Treatment of Distractive Flexion Injury in Lower Cervical Spine using Anterior Cervical Fusion / 대한척추외과학회지

STUDY DESIGN: A retrospective study. OBJECTIVES: To evaluate the availability of anterior cervical plating in the treatment of distractive flexion injury of the lower cervical spine and the relationship between the neurologic findings, types of dislocation, and disc herniation. SUMMARY OF LITERATURE REVIEW: Anterior stabilization of unstable cervical spine injuries is increasing. However, the stability of anterior stabilization only is controversial for the treatment of bilateral dislocation of the cervical spine. MATERIAL AND METHODS: We retrospectively analyzed 32 patients treated with anterior decompression, auto-iliac bone graft, and anterior cervical plating, who suffered from distractive flexion injury in the lower cervical spine from Feb. 1999 to Feb. 2006. Unilateral dislocation occurred in 21 cases, bilateral dislocation in 11 cases, with evaluation of disc status at the injured level conducted after closed reduction by MRI. We statistically analyzed changes in vertebral body height, disc angle, fusion rate, neurologic recovery, and complications. RESULTS: All cases were fused by 12.3+/-2.7 weeks after operation, and the loss of anterior and posterior vertebral body height were statistically significant (p=0.00, 0.00), changes in the disc angle were not (p=0.53). Herniation of the disc was more frequent in unilateral dislocation (p=0.02). Clinically 21 (65%) patients had neurologic deficits, but nerve root injuries recovered in all cases, with the original average ASIA motor score of 55.2 improving to 68.3 at last follow up. CONCLUSIONS: Anterior decompression, bone grafting, and metallic osteosynthesis were effective treatment modalities for distractive-flexion injuries of the lower cervical spine, causing slight vertebral body height decreases but no loss of reduction or neurologic compromise.

Validation in the Cross-Cultural Adaptation of the Korean Version of the Oswestry Disability Index

Disability questionnaires are used for clinical assessment, outcome measurement, and research methodology. Any disability measurement must be adapted culturally for comparability of data, when the patients, who are measured, use different languages. This study aimed to conduct cross-cultural adaptation in translating the original (English) version of the Oswestry Disability Index (ODI) into Korean, and then to assess the reliability of the Korean versions of the Oswestry Disability Index (KODI). We used methodology to obtain semantic, idiomatic, experimental, and conceptual equivalences for the process of cross-cultural adaptation. The KODI were tested in 116 patients with chronic low back pain. The internal consistency and reliability for the KODI reached 0.9168 (Cronbach's alpha). The test-retest reliability was assessed with 32 patients (who were not included in the assessment of Cronbach's alpha) over a time interval of 4 days. Test-retest correlation reliability was 0.9332. The entire process and the results of this study were reported to the developer (Dr. Fairbank JC), who appraised the KODI. There is little evidence of differential item functioning in KODI. The results suggest that the KODI is internally consistent and reliable. Therefore, the KODI can be recommended as a low back pain assessment tool in Korea.

Measurement of the Axial Isthmus for Atlantoaxial Transarticular Screw Fixation / 대한해부학회지

Pre-operative evaluation of the anatomy of the axis, such as the size and angle of the axial isthmus, is very important to minimize complications in atlantoaxial transarticular screw fixation. To provide basic data useful for atlantoaxial transarticular screw fixation in Korean, the width and height of the axial isthmus as well as ideal insertion angle of the screw were measured in this study. Fifty seven (male, 36; female, 21) dried axes obtained from Korean adult cadavers, 60.5 years old in average, were used. The shortest distance in the width and height of the axial isthmus was measured at the level of transverse foramen by using Vernier calliper. The ideal screw insertion angle was set up as an angle between a parasagittal line and the line passing through the center of the isthmus and screw insertion point which is located 2 mm lateral to and 3 mm superior to the posteromedial end of the inferior articular surface of the axis. The mean width of the axial isthmus was 8.14 mm (8.42 mm in male; 7.86 mm in female) in the right and 8.46 mm (8.80 mm in male; 8.12 mm in female) in the left side, and 8.61 mm in male and 7.99 mm in female. Although the width of the axial isthmus was slightly greater in the left and in male, there was no significant difference between both sides or sexes. The mean height of the axial isthmus was 7.17 mm (7.49 mm in male; 6.84 mm in female) in the right and 7.43 mm (7.90 mm in male; 6.96 mm in female) in the left side, and 7.69 mm in male and 6.90 mm in female. However there was no significant difference between both sides or sexes, as like in the width. In the atlantoaxial transarticular screw fixation, the axis with isthmus lesser than 5 mm in its width or height is regarded as risk group in general. The frequency of the risk group in the width was 3.5% (2 cases) in the right and 1.8% (1 case) in the left, while that in the height was 8.8% (5 cases) in the right and 7.0% (4 cases) in the left. The mean ideal insertion angle of the screw was 5.6 degrees, 4.4 degrees in the right and left side of male, and 4.7 degrees, 5.5 degrees in the right and left side of female respectively. However the insertion angle dispersed over a wide range between 0 degree ~ 12 degrees. In conclusion, measurement of the isthmus height and insertion angle, besides the isthmus width, should be involved in the pre-operative examination, to minimize complications during the atlantoaxial transarticular screw fixation.

Postoperative Complications in Patients over 65 years of Age with Lumbar Spinal Stenosis and its Influencing Factors / 대한척추외과학회지

STUDY DESIGN: This is a retrospective study. OBJECTIVES: The purpose of this study is to decrease the frequency of the postoperative complications and to improve the postoperative clinical outcomes for the elderly patients with lumbar spinal stenosis. Summery of Literature REVIEW: Many controversies exist about postoperative complication and its influencing factors in the elderly patients suffering with lumbar spinal stenosis. MATERIALS AND METHODS: We reviewed the hospital records of 213 patients who underwent decompression and posterolateral fusion between February 1, 1998 and December 31, 2003 to treat their degenerative lumbar spinal stenosis. This study was performed, to assess and compare the postoperative complications and clinical outcomes of surgical management for the patients over 65 years (Group A) and the patients between 50-64 years (Group B). All the patients had at least a 1-year follow-up evaluation. The factors that could have influenced the complications that resulted within 12 weeks after the operation were evaluated and statistically analyzed. RESULTS: Postoperative complications occurred in 62 patients of Group A and in 40 patients of Group B, of which the major complications occurred in 10 patients of Group A and in 1 patient of Group B and minor complications occurred in 52 patients of Group A and in 39 patients of Group B. A statistical relationship between diabetes and major complications was observed in Group A (p=0.005). While any relationship between age and the frequency of complication in each group was not found, Group A had a higher frequency of major complication than did Group B (p=0.004). CONCLUSIONS: Surgeon should be vigilant about postoperative complications in elderly patients suffering with diabetic mellitus.Elderly patients with diabetic mellitus should be made aware that they are at an increased risk for postoperative complications because of their fragility.

Comparative Study of the Safety and Effectiveness of Tramadol 37.5 mg/Acetaminophen 325 mg Combined Tablets and Cyclo-Oxygenase-2 (Celecoxib) Inhibitor for the Treatment of Chronic Low Back Pain: A Multicenter, Randomized, Comparative Clinical Study / 대한척추외과학회지

STUDY DESIGN: This is a multicenter, randomized comparative outpatient study on a 8-week administration of Tramadol 37.5 mg/Acetaminophen and 325 mg (Tramadol/APAP) combination tablets and Cyclo-Oxygenase-2 inhibitor (Celecoxib). OBJECTIVES: We wanted to evaluate the efficacy and safety of Tramadol/APAP combination tablets and Celecoxib for the treatment of chronic low back pain. SUMMARY OF THE LITERATURE REVIEW: Tramadol/APAP combination tablets have an analgesic efficacy for the treatment of chronic low back pain. The conditions for which COX-2 inhibitors were be used included a variety of musculoskeletal conditions. However, further analyses are needed to determine the efficacy and safety of Tramadol/APAP combination tablets and Celecoxib for the treatment of chronic low back pain. MATERIALS AND METHODS: One hundred twenty-five patients with chronic low back pain (pain visual analogue scale [VAS] scores >40 mm on 100 mm scale) were randomized to take the Tramadol/APAP combination tablets or Celecoxib for 8 weeks. The primary outcome measure was the pain VAS score, pain relief score and the Korean-version of Oswestry Disability Index (KODI). RESULTS: The study enrolled 125 patients (56 in the Tramadol/APAP tablets group and 69 in the Celecoxib group). There were no significant differences between Tramadol/APAP combination tablets and Celecoxib with regard to the pain VAS scores (VAS; 27.99+/-21.22 vs 24.56+/-16.58, respectively, p>0.05), the pain relief score and the mean decreased disability score on the KODI (0.42+/-0.59 vs 0.46+/-0.05, respectively). The adverse drug reactions showed a statistically significant difference (p<0.05). CONCLUSIONS: The results of this study suggest that Tramadol/APAP combination tablets are just as effective as celecoxib for relieving chronic low back pain.

Relationships between Posterior Ligament Complex Injury and Plain Radiograph in Thoracolumbar Spinal Fracture / 대한척추외과학회지

STUDY DESIGN: A prospective study of 100 patients with thoracolumbar spinal fractures. OBJECTIVES: To assess the relationships between a posterior ligament complex injury and plain radiograph in thoracolumbar spinal fractures. SUMMERY OF LITERATURE REVIEW: Some studies have reported the value of MRI for the evaluation of a posterior ligament complex injury. However, most of these did not evaluate the relationships between the posterior ligament complex and plain radiograph of the thoracolumbar spine fractures. MATERIALS AND METHODS: 100 patients with either a thoracolumbar compression or burst spinal fracture, from T11 to L2 levels, were evaluated by plain radiographs, taken in the supine position, and MRI taken within a week of the trauma. The wedge angle, Cobb's angle and anterior body height were measured on the plain radiographs, and the presence of posterior ligament complex injury on MRI was evaluated and analyzed. RESULTS: In the compression fracture group, the wedge angle, Cobb's angle and anterior body height loss were 19.9+/-1.4 degrees, 14.3+/-2.2 degrees and 35.6+/-3.6%, respectively, in the posterior ligament complex injury subgroup, but only the anterior vertebral body height loss was statistically significant (p=0.04). In the burst fracture group, the wedge angle, Cobb's angle and anterior body height loss were 26.4+/-2.0 degrees, 23.3+/-1.7 degrees and 57.4+/-5.2%, respectively, in the posterior ligament complex injury subgroup, which were all statistically significant (p=0.00, 0.02, 0.00). With a sensitivity of 75% or greater, the wedge angle, Cobb's angle and anterior body height loss in compression and burst fractures were more than 15 degrees, 10 degrees and 30% and 20 degrees, 20 degrees and 40%, respectively. CONCLUSIONS: When the values of wedge angle, Cobb's angle and anterior body height loss in the compression and burst fractures were more than 15 degrees, 10 degrees and 30% and 20 degrees, 20 degrees and 40%, respectively, and the sensitivity for the presence of a posterior ligament complex injury was more than 75%. Therefore, these values in the screening test are indicators for the presence of a posterior ligament complex injury. Further careful evaluations, such as MRI, are still required in deciding the appropriate treatment method.

Cross-cultural Adaptation of the Korean Version Of the Oswestry Disability Index (ODI) / 대한척추외과학회지

STUDY DESIGN: Cross-cultural adaptation of the Korean version of the Oswestry Disability Index (KODI). OBJECTIVES: To conduct the cross-cultural adaptation for translating the original version of Oswestry Disability Index (ODI) (English version) SUMMARY OF LITERATURE REVIEW: Society is multicultural populations income. (This makes no sense?) Since languages and cultures are highly related, any cross-cultural assessment must be addressed in the outcome of the measurements. (I have made this into a proper sentence, but the meaning is still unclear, please confirm?) The Oswestry Disability Index (ODI) has not been translated into Korean, but is the most widely used tool in the world for measuring the intensity of back pain. MATERIAL AND METHOD: We used the guideline for the translation and cultural adaptation process, (Where were these guidelines from?) including forward translation, synthesis of translation, backward translation, committee review, pre-testing, test of the pro-final version, and finally, submission of the documentation to the developers. The Korean version of the Oswestry Disability Index (KODI) was tested on 116 patients with chronic low back pain. RESULTS: The reliability for the KODI, as measured by the Cronbach's alpha value, was 0.9168, and the reliability of the testretest was 0.9331. The process results were reported to the developer (Dr. Jeremy Fairbank), who appraised the KODI. CONCLUSIONS: The KODI was found to have satisfactory reliability. Therefore, the KODI can be recommended as a tool for the measurement of lower back pain in Korea.

Distractive Atlantoaixial Dislocation / 대한척추외과학회지

Atlantoaxial dislocations usually present with fatal brain injury, but rarely with clinical problems. With the development of newer imaging techniques, as well as improved preoperative and perioperative care, the likelihood of survival from an atlantoaxial dislocation has increased. Survivors usually suffer incomplete neurological deficits, including Brown-Sequard syndrome or central cord syndrome. The authors describe a distractive atlantoaxial dislocation, with neurological sequelae, in a younger patient who had been involved in a car accident. This case was treated surgically, but the patient suffered paraplegia due to thoracic myelopathy.

Range of Motion of Cervical Spine in Normal Korean People / 대한척추외과학회지

STUDY DESIGN: A prospective study is to evaluate the cervical range of motion through the analysis of the plain films of the cer-vical spine. OBJECTIVE: To provide criteria validity for the cervical lordosis, range of motion and segmental motion of each segment using normal Korean adults, as guide lines for the radiographic diagnosis and treatment of cervical diseases. MATERIALS AND METHODS: One hundred and four healthy Korean adults were examined. Roentgenographic lateral views were taken in neutral, active flexion and extension positions. Measurement of the range of motion and segmental motion of the cer-vical spine, using the technique of Penning and Bakke, were independently made by two observers. RESULTS: The mean angle of the lordosis and the range of motion were 19.8degrees+/-8.4degrees and 63.1degrees+/-11.2degrees respectively, and the range of motion of each segment were 10.3degrees+/-2.9degrees, 9.2degrees+/-3.0degrees, 13.5degrees+/-7.2degrees 15.1degrees+/-4.3degrees, 15.6degrees+/-4.4degrees and 13.0degrees+/-5.0degrees and C1-2, C2-3, C3-4, C4-5, C5-6 and C6-7, respectively. There were no differences in the lordotic angle between the ages and genders. The range of motion decreased with increasing age, but there was no difference between genders. The segmental motion was no different between genders, but decreased significantly with increasing age on segments C1-2, C5-6 and C6-7. CONCLUSIONS: No significant differences were found in the range of cervical motion of each segment and the lordotic angle of the Korean population compared with those of other populations. The range of cervical motion also decreased with increasing age. These data provide guidelines in the dynamics of cervical spine and for the roentgenographic diagnosis and treatment of cervi-cal diseases.