PURPOSE: The Humerusblock is a minimally invasive device allowing fixation of proximal humeral fractures. A drawback of the device is possible K-wire perforation of the head with the need for early removal of the implant. We assessed the amount of humeral head impaction and its role in the postoperative varus/valgus deviation of the humeral head in fractures of the upper humerus treated with Humerusblock. METHODS: Fractures were classified according to the Codman-Lego system. The length of the posteromedial metaphyseal extension and integrity of medial hinge were measured; metaphyseal comminution was assessed. Accuracy of fracture reduction was classified as excellent to poor. An original method of measurement of amount of postoperative impaction of the humeral head was developed. The impaction and varus/valgus inclination of the heads were measured comparing postoperative and three-month follow-up radiographs. Constant score and its relation to sintering was calculated at 12-month follow-up. RESULTS: Forty-three fractures were available for follow-up. The amount of humeral head impaction was 3.9 mm on average and was directly correlated with patient's age, sex, Codman-Lego classification, varus inclination and mataphyseal comminution. The postoperative cervico-diaphyseal angle was restored in 35 cases, with 81 % good results. The Humerusblock was removed in 41 % of cases because of K-wire perforation of the humeral head. A negative correlation was found between impaction and Constant score. CONCLUSIONS: The amount of humeral head impaction is related to patients' age, sex, and fracture patterns, being the most prone to compaction those with metaphyseal comminution. Humeral head impaction negatively affects final Constant score.
PURPOSE: The Humerusblock is a minimally invasive device allowing fixation of proximal humeral fractures. A drawback of the device is possible K-wire perforation of the head with the need for early removal of the implant. We assessed the amount of humeral head impaction and its role in the postoperative varus/valgus deviation of the humeral head in fractures of the upper humerus treated with Humerusblock. METHODS:Fractures were classified according to the Codman-Lego system. The length of the posteromedial metaphyseal extension and integrity of medial hinge were measured; metaphyseal comminution was assessed. Accuracy of fracture reduction was classified as excellent to poor. An original method of measurement of amount of postoperative impaction of the humeral head was developed. The impaction and varus/valgus inclination of the heads were measured comparing postoperative and three-month follow-up radiographs. Constant score and its relation to sintering was calculated at 12-month follow-up. RESULTS: Forty-three fractures were available for follow-up. The amount of humeral head impaction was 3.9 mm on average and was directly correlated with patient's age, sex, Codman-Lego classification, varus inclination and mataphyseal comminution. The postoperative cervico-diaphyseal angle was restored in 35 cases, with 81 % good results. The Humerusblock was removed in 41 % of cases because of K-wire perforation of the humeral head. A negative correlation was found between impaction and Constant score. CONCLUSIONS: The amount of humeral head impaction is related to patients' age, sex, and fracture patterns, being the most prone to compaction those with metaphyseal comminution. Humeral head impaction negatively affects final Constant score.
Authors: Christian Spross; Andreas Platz; Matthias Erschbamer; Thomas Lattmann; Michael Dietrich Journal: Clin Orthop Relat Res Date: 2011-12-13 Impact factor: 4.176
Authors: Addie Majed; Iain Macleod; Anthony M J Bull; Karol Zyto; Herbert Resch; Ralph Hertel; Peter Reilly; Roger J H Emery Journal: J Shoulder Elbow Surg Date: 2011-04-09 Impact factor: 3.019
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: Reinhold Ortmaier; Georg Mattiassich; Matthias Pumberger; Wolfgang Hitzl; Philipp Moroder; Alexander Auffarth; Herbert Resch Journal: Int Orthop Date: 2014-07-20 Impact factor: 3.075
Authors: Reinhold Ortmaier; Verena Filzmaier; Wolfgang Hitzl; Robert Bogner; Thomas Neubauer; Herbert Resch; Alexander Auffarth Journal: BMC Musculoskelet Disord Date: 2015-10-14 Impact factor: 2.362
Authors: Robert Bogner; Reinhold Ortmaier; Philipp Moroder; Stefanie Karpik; Christof Wutte; Stefan Lederer; Alexander Auffarth; Herbert Resch Journal: Biomed Res Int Date: 2016-11-17 Impact factor: 3.411
Authors: Ivan Fadanelli Simionato; João Pedro Farina Brunelli; Marco Tonding Ferreira; Fabio Yoshihiro Matsumoto; Almiro Gerszon Britto; Fernando Carlos Mothes Journal: Rev Bras Ortop (Sao Paulo) Date: 2020-06-25