PURPOSE OF THE STUDY The method of stabilising the osteoporosis-related spinal fractures using an expandable stent (vertebral body stent - VBS) and bone cement is generally accepted for its minimal invasiveness, a low risk of complications and confirmed analgesic effect. The efficiency of reduction of a compressed vertebra is, however, still discussed in the literature. Our hypothesis was that the stent expansion in the vertebral body can achieve a statistically significant reduction in the anterior, middle and posterior part of the vertebra. MATERIAL AND METHODS The patients in whom the VBS technique was used to treat an osteoporosis-related fracture of Th/L spine in the period 2010-2014 were included in the study, namely 29 patients with 31treated fractures. The following radiographic parameters were monitored - anterior, middle and posterior vertebral body height, kyphotic angle between the upper and lower endplates of the vertebral body. Also, the radiation burden, painfulness according to VAS score and occurrence of complications were monitored. The minimum follow-up was 12 months. RESULTS The mean height of the anterior part of the vertebral body before the surgery, on the 1st postoperative day and at 6 weeks, 3 months, 6 months and 12 months was 23.5/25.4/23.9/23.6/23.6 mm respectively. The mean height of the middle part of the vertebral body at the same intervals was 17.9/24.0/23.4/22.9/22.9/22.9 mm. The mean height of the posterior part of the vertebral body was 29.6/29.8/29.4/29.3/29.2/29.2 mm. The kyphotic angle between the endplates of the vertebral body was 8.6/5.3/7.4/7.9/8.0/8.0°. The mean VAS values were 8.2/2.4/2.0/1.9/1.8/1.7. The mean duration of surgery was 54.3 minutes. The mean time of fluoroscopy was 33.4 s. The mean radiation dose was 443.1 cGycm2. The observed complications comprised 2 cases of dilatation balloon rupture, one case of a failure to expand the stents in a healed fracture due to incorrect indication. In total, four cases of cement leakage outside the vertebral body were reported, always with no clinical response. DISCUSSION All the authors agree that the method brings immediate analgesic effect, comparable to kyphoplasty or vertebroplasty. In our cohort, good reduction ability of the implant in the middle part of the vertebral body was confirmed. This has been confirmed also by other authors. Nonetheless, at a longer time interval the loss of correction was observed, which was reported only by Hartmann (5). The other authors mostly did not take into account the longer-term outcomes. CONCLUSIONS The hypothesis that the stent is capable of a statistically significant reduction in the anterior, middle and posterior portion of the vertebral body was only partially confirmed. A statistically significant reduction was seen only in the middle portion of the vertebral body. In the anterior portion of the vertebral body the reduction was demonstrable only immediately after the surgery, while the later follow-up checks revealed the loss of correction. The statistically significant improvement of the kyphotic angle between the endplates of the injured vertebra was also seen only on the first postoperative radiographs and at later follow-up checks the improvement was no more significant. The change in the height of the posterior portion of the vertebral body was not statistically significant at any of the follow-up intervals. Key words:osteoporosis, vertebral fracture, vertebral body augmentation, stentoplasty, vertebral body stent.
- MeSH
- bederní obratle MeSH
- fraktury páteře * chirurgie MeSH
- hrudní obratle MeSH
- kompresivní fraktury * MeSH
- kostní cementy MeSH
- lidé MeSH
- osteoporóza * MeSH
- stenty MeSH
- výsledek terapie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
PURPOSE OF THE STUDY Acromioclavicular joint dislocations (AC) represent one of the most frequent injury to the shoulder gridle. Low grade injuries type Rockwood I-II are treated non-operatively. Whereas high grade injuries type Rockwood III-VI are usually treated operatively. At present a wide spectrum of surgical techniques is used: Bosworth screw, hook plate, pinning and tension banding, PDS-sling. In our study the pinning and tension banding technique and the modified orthocord sling technique were compared. The goal of this study was to determine whether there are any clinical and radiological differences between these two techniques. MATERIAL AND METHODS This retrospective non-randomized level 3 evidence study included 58 patients. All of them have sustained a Tossy III AC dislocation. Of the 58 patients, 31 were treated with pinning and tension banding. Modified orthocord (absorbable knitted strand) sling technique (One 2.0-2.5 mm Kirchner wire, orthocord tension banding and coraco-clavicular ligament suture) was used in 27 patients. The same regime was used in postoperative follow up. For the clinical assessment the ASES and Constant score were used. The presence of calcification, degenerative changes, clavicular dislocation were assessed during the X-ray follow-ups. RESULTS The mean treatment time was 18.7 ± 4.9 weeks in the pinning and tension band group (Group A), whereas 15.8 ± 2.8 weeks in the modified orthocord sling technique (Group B). There was a significantly shorter period of healing in Group B. There were no statistically significant differences in the K wire removal time (Group A: 12.6 ± 3.7, Group B: 11.9 ± 3.2). No significant difference was observed between Group A and Group B on the ASES score (Group A: 95 ± 5.8, Group B: 98 ± 3.1) and on the Constant score (Group A: 97.7 ± 3.2, Group B: 97.9 ± 2.9). There were significant differences in both groups between the injured and non-injured shoulder on the Constant score. The mean secondary clavicular dislocation in Group A was 7.2 ± 1.8 mm in the operated shoulder and 4.8 ± 2.0 mm in the non-operated shoulder. The secondary dislocation in Group B was 7.5 ± 2.0 mm in the injured shoulder and 4.2 ± 1.2 mm in the non-injured shoulder. There was a significant difference between the injured and the non-injured shoulder in both groups. Calcification in coraco-clavicular ligament was observed in 15 (48.4%) Group A cases and in 13 (48.1%) Group B cases. Secondary AC joint arthrosis was observed in 8 (25.8%) Group A cases and in 1 (3.7%) Group B case. DISCUSSION No significant difference in clinical outcomes between both the surgical techniques was found. These results are comparable with other, recently published studies. On the other hand, we observed a significantly decreased treatment time with the modified orthocord sling technique. One, centrically inserted Kirschner wire, might better tolerate small rotation movements in the AC joint. Secondary clavicular dislocation, Kirschner wire dislocations and wound complications were similar in both groups and comparable to other, recently published studies. CONCLUSIONS Even though the tension banding and orthocord modified sling rank among the oldest and the cheapest techniques available for AC dislocation treatment, their results are comparable with modern and costly techniques. The orthocord modified sling technique has an advantage of fast and cheap material extraction in outpatient conditions. Key words: AC dislocation, acromioclavicular joint dislocation, orthocord sling, tension banding, AC disruption, acromioclavicular joint disruption.
- MeSH
- akromioklavikulární kloub * MeSH
- dislokace kloubu * MeSH
- imobilizace MeSH
- lidé MeSH
- luxace ramenního kloubu * terapie MeSH
- retrospektivní studie MeSH
- výsledek terapie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
