Jonas Schmalzl1,2, Malik Jessen3,4, Fabian Gilbert5, Christian Gerhardt3, Lars-Johannes Lehmann3,4. 1. Department of Traumatology and Hand Surgery, St. Vincentius Clinic, ViDia Clinics, Suedendstraße 32, 76137, Karlsruhe, Germany. schmalzl_j@ukw.de. 2. Department of Trauma, Hand, Plastic and Reconstructive Surgery, Julius-Maximilians-University of Wuerzburg, Oberduerrbacher Str. 6, 97080, Wuerzburg, Germany. schmalzl_j@ukw.de. 3. Department of Traumatology and Hand Surgery, St. Vincentius Clinic, ViDia Clinics, Suedendstraße 32, 76137, Karlsruhe, Germany. 4. Orthopaedic and Trauma Surgery Centre (OUZ), Medical Faculty Mannheim, Ruprecht-Karls-University, Heidelberg, Germany. 5. Department of Trauma, Hand, Plastic and Reconstructive Surgery, Julius-Maximilians-University of Wuerzburg, Oberduerrbacher Str. 6, 97080, Wuerzburg, Germany.
Abstract
BACKGROUND: In the presence of cuff tear arthropathy (CTA), joint kinematics is alternated and fracture configuration might be different. The purpose of this study was to identify fracture patterns in patients with advanced CTA to facilitate recognition and treatment. METHODS: Radiographs and computed tomography scans of all patients undergoing surgical treatment for a proximal humeral fracture (PHF) in our institution during a 5-year period were retrospectively analyzed. Fracture pattern according to the AO-OTA and Resch classification and the presence of CTA were evaluated. Glenoid configuration according to Walch, fatty atrophy of the supraspinatus muscle and the centrum-collum-diaphyseal (CCD) angle were analyzed. RESULTS: A total of 574 out of 713 patients were included. Twenty-three patients (4%) with a mean age of 82 ± 8 years showed advanced CTA with acetabularization of the acromion (≥ stage 3 according to Hamada/Fukuda). There were exclusively valgus fractures with a mean CCD angle of 158° ± 18°. Patients with CTA ≥ grade 3 had a nearly twofold greater risk (risk ratio: 1.8; confidence interval (CI): 95% 1.6-1.9; p < 0.0001) of sustaining a valgus fracture compared to patients without or with CTA < grade 3. The risk for a tuberosity fracture was nearly twofold greater in patients without or with mild CTA (risk ratio: 1.68; confidence interval (CI): 95% 1.17-2.40; p = 0.0046) compared to those with advanced CTA. CONCLUSION: In advanced CTA, a predominantly valgus fracture pattern can be observed. In addition, fractures of the greater tuberosity were significantly less frequent and were rarely displaced. Up to date, no classification system for PHF has been developed in the setting of CTA although it might indicate a different treatment, and therefore, recognition is crucial. However, when present, this changes the fracture pattern and ability to treat the fracture as the rotator cuff can no longer be utilized as a means of reducing the fragments.
BACKGROUND: In the presence of cuff tear arthropathy (CTA), joint kinematics is alternated and fracture configuration might be different. The purpose of this study was to identify fracture patterns in patients with advanced CTA to facilitate recognition and treatment. METHODS: Radiographs and computed tomography scans of all patients undergoing surgical treatment for a proximal humeral fracture (PHF) in our institution during a 5-year period were retrospectively analyzed. Fracture pattern according to the AO-OTA and Resch classification and the presence of CTA were evaluated. Glenoid configuration according to Walch, fatty atrophy of the supraspinatus muscle and the centrum-collum-diaphyseal (CCD) angle were analyzed. RESULTS: A total of 574 out of 713 patients were included. Twenty-three patients (4%) with a mean age of 82 ± 8 years showed advanced CTA with acetabularization of the acromion (≥ stage 3 according to Hamada/Fukuda). There were exclusively valgus fractures with a mean CCD angle of 158° ± 18°. Patients with CTA ≥ grade 3 had a nearly twofold greater risk (risk ratio: 1.8; confidence interval (CI): 95% 1.6-1.9; p < 0.0001) of sustaining a valgus fracture compared to patients without or with CTA < grade 3. The risk for a tuberosity fracture was nearly twofold greater in patients without or with mild CTA (risk ratio: 1.68; confidence interval (CI): 95% 1.17-2.40; p = 0.0046) compared to those with advanced CTA. CONCLUSION: In advanced CTA, a predominantly valgus fracture pattern can be observed. In addition, fractures of the greater tuberosity were significantly less frequent and were rarely displaced. Up to date, no classification system for PHF has been developed in the setting of CTA although it might indicate a different treatment, and therefore, recognition is crucial. However, when present, this changes the fracture pattern and ability to treat the fracture as the rotator cuff can no longer be utilized as a means of reducing the fragments.
Authors: Corinne R Adams; Mark A Baldwin; Peter J Laz; Paul J Rullkoetter; Joseph E Langenderfer Journal: J Biomech Date: 2007-06-26 Impact factor: 2.712
Authors: A Roux; L Decroocq; S El Batti; N Bonnevialle; G Moineau; C Trojani; P Boileau; F de Peretti Journal: Orthop Traumatol Surg Res Date: 2012-09-19 Impact factor: 2.256
Authors: B K Moor; M Röthlisberger; D A Müller; M A Zumstein; S Bouaicha; M Ehlinger; C Gerber Journal: Orthop Traumatol Surg Res Date: 2014-07-08 Impact factor: 2.256