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Purpose: The purpose of this study was to evaluate the long-term clinical and radiographic outcomes of partial patellectomy (PP) in patients with patella comminuted distal pole fractures.
Methods: Seventeen patients who were diagnosed with patella comminuted distal pole fractures and underwent PP procedures were retrospectively included between January 1995 and January 2005. We collected patient demographics and data on the mechanism of injury, time to surgery, fracture type, follow-up time, and post-operative complications (infection, patellofemoral arthritis, and stiffness). At the final follow-up, functional outcome was evaluated by the range of motion (ROM) and the Bostman Scoring System. Quadriceps strength was evaluated by using an isokinetic dynamometer to measure peak torque, and patellar height was evaluated by the Insall-Salvati (IS) ratio in lateral knee radiographs. The average follow-up period was 14.6 years (range, 11-19 years).
Results: We analyzed 17 patients (AO/OTA 34-A1), with an average age of 59.8 years (range, 43-76 years). According to the Bostman grading scales, final functional outcomes were excellent in 11 (64.7%) and good in six (35.3%) patients. All patients had full knee extension, and the average ROM was 125.1° (range, 121.4-129.3°). The average peak torque of the injured knee was 103.2 ± 9.7 Nm, and that of the uninjured opposite side was 108.3 ± 7.6 Nm, with no significant difference (p > 0.05). Furthermore, no postoperative complications, such as infection, posttraumatic osteoarthritis, or stiffness, were observed. Compared to the uninjured knee, the IS ratio of the injured knee was 0.76 ± 0.13, indicating that the patellar height was decreased, which meant patella baja.
Conclusions: The PP procedure for patella comminuted distal pole fractures is a safe, simple, and reliable technique that can provide good long-term clinical outcomes even with decreased patellar height and could be a satisfactory alternative treatment option when anatomical reduction is difficult.
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http://dx.doi.org/10.1007/s00264-021-05127-w | DOI Listing |
Spartan Med Res J
August 2025
Henry Ford Macomb Hospital, Clinton Twp, MI.
Introduction: There is a high rate of surgical complications and removal of symptomatic hardware for patients who have undergone open reduction internal fixation (ORIF) for transverse patella fractures. In recent years there has been increased interest in more low profile ORIF techniques to combat these issues. The aim of this study was to evaluate if a reduced hardware burden would correlate with fewer complications and equal rates of fracture union when compared to traditional techniques for treating transverse patella fractures.
View Article and Find Full Text PDFKnee Surg Relat Res
July 2025
Faculty of Medicine and University Hospital, Center for Orthopedic and Trauma Surgery, University of Cologne, Kerpener Str. 62, 50937, Cologne, Germany.
Introduction: Patella fractures account for about 1% of all bone fractures, predominantly affecting males at a 2:1 ratio and exhibiting distinctive age-related patterns. In younger individuals, these injuries typically result from high-velocity impacts, while in the elderly, they usually arise from lower-energy impacts. Consequently, the types of fractures differ; horizontal fractures are more common in younger individuals, whereas comminuted fractures are more prevalent in older adults.
View Article and Find Full Text PDFBMC Musculoskelet Disord
July 2025
Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
Background: Due to the patella's thin overlying skin, metal implants frequently cause local discomfort that necessitates removal. This study aimed to evaluate the intraoperative and early postoperative outcomes of treating comminuted patellar fractures using non-absorbable sutures as the sole internal fixation method via the Nice knot technique.
Methods: This retrospective study reviewed 25 patients with unilateral closed comminuted patellar fractures who underwent open reduction and internal fixation using either non-absorbable sutures tied with a Nice knot (NK group, n = 12) or the traditional tension band technique (TB group, n = 13).
Clin Biomech (Bristol)
April 2025
Cantonal Hospital Graubünden, Loestrasse 170, 7000 Chur, Switzerland. Electronic address:
Background: Treatment of complex patella fractures represents a challenging clinical problem. Whereas controversy exists regarding the most appropriate fixation method, anterior plating is an emerging treatment option. A novel design of anterior variable-angle locking plates features radiating legs with integrated screw holes aiming at capturing fragments of the distal comminuted zone via either a locking or a cortical polar screw.
View Article and Find Full Text PDFFront Bioeng Biotechnol
March 2025
Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, China.
Background: Fractures involving the inferior pole of the patella can lead to postoperative patella baja. For comminuted patellar fractures that affect both the articular surface and the inferior pole, we aim to explore a new fixation method that provides reliable internal stabilization while reducing the incidence of patella baja.
Methods: We conducted a finite element biomechanical study and a retrospective cohort clinical study.