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. 2025 May 19;15(5):202.
doi: 10.3390/jpm15050202.

Clinical Outcomes in the Treatment of Pertrochanteric Femur Fractures: A Retrospective Cohort Study

Cesare Donadono  1 , Domenico Tigani  1 , Andrea Assenza  1 , Davide Censoni  1 , Francesco Pesce  2 , Giuseppe Melucci  1
Affiliations

Clinical Outcomes in the Treatment of Pertrochanteric Femur Fractures: A Retrospective Cohort Study

Cesare Donadono et al. J Pers Med. .

Abstract

Background: Pertrochanteric fractures of the proximal femur present a common challenge for traumatologists, with intramedullary nailing emerging as the preferred treatment. Complication rates are around 20%, including screw jamming, refractures, implant breakage, or medial migration, with cut-out being the most common. A tip-apex distance (TAD) of >25 mm and incorrect cephalic screw position are predictive factors for cut-out. This study assesses outcomes using the Elos intramedullary nail, based on the experience of the Department of Orthopedics and Traumatology at Ospedale Maggiore in Bologna. Methods: We conducted a retrospective cohort study of 344 patients treated with the Elos intramedullary nail for pertrochanteric femoral fractures from 1 January 2017 to 31 December 2022. The Elos®-Intrauma nail was implanted using the standard technique. Initial X-rays classified fractures according to the AO-OTA classification, and postoperative X-rays confirmed the cephalic screw's placement per Cleveland's regions. Patients were divided into two groups: optimal cephalic screw position (positions 5-8-9) and other positions. We evaluated TAD, calcar-referred TAD (CalTAD), and postoperative reduction quality using Chang's criteria. The incidence of cut-out and other complications were assessed in connection with these measurements. Results: Among the 344 patients, 227 (65.9%) had the screw in positions 5-8-9, while 117 (34.1%) had it in other positions. The median TAD was 19.47 ± 6.26 mm (range 3.96-46.6), with TAD ≤ 25 mm in 265 patients (77%). The median CalTAD was 22.37 ± 5.65 mm (range 8.75-45.3), with CalTAD ≤ 25 mm in 231 patients (67.1%). According to Chang's criteria, 8 cases (2.3%) had poor reduction, 139 cases (40.4%) had acceptable reduction, and 197 cases (57.3%) had excellent reduction. Cut-out occurred in four cases (1.19%). Multivariate analysis revealed only poor reduction and TAD > 25 mm as independent predictors of cut-out (p < 0.05), while cephalic screw position, CalTAD, and fracture type did not impact cut-out incidence. Conclusions: This study indicates that optimal TAD and quality of reduction are crucial for minimizing cut-out risks. The Elos intramedullary nail shows favorable outcomes with a low cut-out incidence when these parameters are met. Emphasis should be placed on achieving a TAD ≤ 25 mm and excellent reduction quality to reduce complications.

Keywords: CalTAD; TAD; cephalic screw positioning; cut-out; intramedullary nailing; pertrochanteric fractures.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Elos Intrauma Nail.
Figure 2
Figure 2
Femoral head position as described by Cleveland.
Figure 3
Figure 3
TAD (a) and CalTAD (b) measurements.
Figure 4
Figure 4
Distribution (%) of screw insertion position, preferred cephalic screw positions (5, 8, and 9) highlighted in yellow.
See this image and copyright information in PMC

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