Journal of Orthopaedic Science最新文献

Background: The global increase in femoral neck fractures due to aging and osteoporosis is a major clinical challenge. The debate on the optimal surgical intervention for femoral neck fractures remains unresolved. This large-scale study explores femoral neck fractures among the elderly, focusing on the comparative outcomes of Total Hip Arthroplasty (THA) versus Bipolar Hemiarthroplasty (BHA) in Japanese patients.

Methods: Using the Japanese National Administrative Diagnosis Procedure Combination (DPC) database, we studied cases of femoral neck fracture from April 2016 to March 2023, and after propensity score matching by age, sex, and comorbidities, we examined the association between THA, complications, and clinical outcomes, and the usefulness of THA for elderly patients with femoral neck fracture.

Results: One-to-one propensity score matching identified 7741 pairs of THA and BHA cases. There was no difference in length of stay between the THA and BHA groups. Significantly more blood transfusions were required in the THA group. There was no significant difference in mortality between the THA and BHA groups, but there was a reduced risk of pneumonia in the THA group, with a ratio of 0.547 (95% CI: 0.418-0.715). On the other hand, the THA group had a higher risk of pulmonary embolism, with a ratio of 1.607 (95% CI: 1.379-1.874). The THA group shows improved discharge rates directly home from the facility where the operation was performed, with a ratio of 1.798 (95% CI: 1.675-1.929).

Conclusion: The findings of this research indicate that THA is more effective than BHA in enabling elderly Japanese patients with femoral neck fractures to be discharged directly home and in preventing pneumonia, despite concerns about pulmonary embolism. These findings suggest that THA may improve functional prognosis in elderly patients with femoral neck fractures, although there is a trade-off with an increased risk of pulmonary embolism.

Background: It has been reported on the relationship between the medial cuneiform bone morphology, especially in terms of obliquity, and the severity of hallux valgus (HV), however, no consensus has been obtained. On the other hand, there are no reports on the relationship between the difference in height between the medial and intermediate cuneiforms and the severity of hallux valgus. The purpose of this study was to clarify the relationship between the medial cuneiform bone morphology and the severity of HV.

Methods: The authors retrospectively analyzed 200 feet of 116 patients who had a weightbearing anteroposterior foot radiograph taken between April 2017 and July 2022 and diagnosed with HV. Measurements included the hallux valgus angle (HVA), the intermetatarsal angle (IMA), the distal medial cuneiform angle (DMCA) and the cuneiform first-second length (C1-2D). HV groups were classified into one of three groups: mild (15 ≦ HVA<30°, 9 < IMA<13°), moderate (30 ≦ HVA<40°, 13 ≦ IMA≦20°) and severe groups (HVA≧40°, IMA>20°), and the relationship to DMCA or the difference in height between the medial and intermediate cuneiforms was analyzed.

Results: A total of 163 feet of 93 patients were included in this study. There were significant correlations between the HVA and the DMCA (r = 0.47, p <0.001) or the C1-2D (r = 0.64, p <0.001). There was no significant difference in DMCA between the mild and moderate groups (p = 0.14). On the other hand, significant differences in C1-2D were observed between the three groups (mild-moderate; p <0.001, moderate-severe; p = 0.03, mild-severe; p <0.001). IMA was also positively correlated with the DMCA (r = 0.30, p <0.001) or the C1-2D (r = 0.47, p <0.001). However, the DMCA (p = 0.07) and the C1-2D (p = 0.39) did not differ significantly from IMA between the moderate and severe groups.

Conclusions: The difference in height between the medial and intermediate cuneiforms, referred to as C1-2D, is closely associated with the HVA. The C1-2D may influence the progression of HV and be a novel radiographic parameter that indicates severity of HV.

Background: The aim of this study was to compare outcomes and complications in patients with and without a history of prior rotator cuff surgery who underwent reverse total shoulder arthroplasty (RTSA).

Methods: Two-hundred and nine consecutive patients who had undergone RTSA for rotator cuff insufficiency with a minimum 12-months follow-up period were reviewed. A total of 35 patients with a history of prior rotator cuff surgery were made the study group (PS group). Using propensity score matching for age and sex, these patients were matched 1:3 with a control group of 105 patients with no history of prior surgery (NPS group). The mean follow-up period was 41.4 months.

Results: Both groups showed a significant improvement of clinical scores and range of motion after RTSA. The PS group showed a significantly higher final visual analog scale (VAS) pain score compared with the NPS group (P = 0.020). The PS group showed a significantly higher incidence of acromial stress fracture compared with the NPS group (17.1% vs 4.8%, P = 0.018), but no significant difference in the overall complication rate was observed (25.7% vs 13.3%, P > 0.05). The PS group showed a significantly higher reoperation rate compared with the NPS group (14.3% vs 1.9%, P = 0.004).

Conclusions: Our study demonstrated that a history of prior rotator cuff surgery was associated with a high incidence of acromial stress fracture and reoperation after RTSA as well as a high final VAS pain score, although satisfactory clinical outcomes after RTSA were achieved in both groups.

Background: Incomplete reduction and fixation of intertrochanteric femoral fractures significantly affect patients' daily activities. The lateral wall's integrity is pivotal in such fractures. This study examines instability, particularly lateral wall fractures at the lag screw insertion site and postoperative anterior wall fractures.

Methods: Overall, 161 patients with femoral intertrochanteric fractures were included. Three-dimensional computed tomography was conducted preoperatively and 3 weeks postoperatively to determine the postoperative anterior wall fractures incidence. Patient background, operative time, intraoperative blood loss, postoperative telescoping, and daily living activities were compared.

Results: The study recorded 51 cases of lateral wall fractures at the lag screw insertion site and 17 of postoperative fractures of the anterior wall. Postoperative fractures of the anterior wall were found in 3 of 110 and 14 of 51 patients in the group without and with the lag screw insertion site, respectively. The group of postoperative fractures of the anterior wall had significantly lower bone mineral density, longer operative time, and increased intraoperative blood loss. At 4 weeks postoperatively, the group of postoperative fractures of the anterior wall showed increased telescoping and decreased motor component of the functional independence measure (with postoperative fractures of the anterior wall: 28, without postoperative fractures of the anterior wall: 30), and significant reductions were observed in the transfer and locomotion items, indicating lower limb function (with postoperative fractures of the anterior wall group: 11, without postoperative fractures of the anterior wall group: 12).

Conclusions: Postoperative anterior wall fractures occurred in 27.5% cases with lateral wall fractures at the lag screw insertion site. Three-dimensional computed tomography is useful for preoperative evaluation of lateral wall fractures at the lag screw insertion site to assess instability. Postoperative fractures of the anterior wall related reduction in daily living activities needs attention.

Background: Although various surgical methods are available for unstable distal clavicle fractures, consensus remains lacking on the optimal technique. Therefore, the present retrospective study aimed to compare the clavicle hook plate and Scorpion Plate® in terms of clinical outcomes and radiological findings for unstable distal clavicle fractures.

Methods: Fifty-seven patients with unstable distal clavicle fractures who underwent treatment using a clavicle hook plate (Group H; 28 patients) or Scorpion Plate® (Group S; 29 patients) were included in the present study. No patients received additional augmentation and all were followed-up for >1 year (mean follow-up, 28 months). Clinical outcomes were operation time, bleeding volume, complications, range of motion (ROM) at 6 months after surgery and final follow-up, and clinical scores (Constant-Murley score and University of California, Los Angeles (UCLA) shoulder score). Radiological outcomes assessed were coracoclavicular distance (CCD), difference in CCD between affected and non-affected sides (ΔCCD), and acromioclavicular subluxation ratio (%ACS) from plain X-rays. The χ² test and Mann-Whitney U test were used to compare each outcome.

Results: Complications were seen in 3 shoulders (10.7%) in Group H. ROM was significantly worse in Group H at 6 months postoperatively, but no significant differences between groups were evident at final follow-up. Moreover, no significant differences in clinical outcomes were seen between groups. In terms of radiological results, Group H showed greater improvement in CCD and ΔCCD than Group S. Further, %ACS was significantly worse in Group S.

Conclusions: The clavicle hook plate allows reconstruction of a more anatomical position than the Scorpion Plate®, but carries a greater risk of complications. Conversely, the Scorpion Plate® has a low risk of complications, but acromioclavicular subluxation remains. However, no significant differences in ROM or clinical outcomes were apparent at final follow-up.