Hiroyuki Koshimizu1,2, Hiroaki Nakashima1,2, Keigo Ito3,2, Kei Ando1,2, Kazuyoshi Kobayashi1,2, Fumihiko Kato3,2, Koji Sato4,2, Masao Deguchi5,2, Yuji Matsubara6,2, Hidenori Inoue7,2, Tokumi Kanemura8,2, Tetsuya Urasaki9,2, Hisatake Yoshihara10,2, Norimitsu Wakao11,2, Ryuichi Shinjo12,2, Shiro Imagama1,2. 1. Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan. 2. Nagoya Spine Group, Japan. 3. Department of Orthopaedic Surgery, Chubu Rosai Hospital, Nagoya, Aichi, Japan. 4. Department of Orthopaedic Surgery, Japanese Red Cross Nagoya Daini Hospital, Nagoya, Aichi, Japan. 5. Department of Orthopaedic Surgery, Nagano Red Cross Hospital, Nagano, Nagano, Japan. 6. Department of Orthopaedic Surgery, Kariya Toyota General Hospital, Kariya, Aichi, Japan. 7. Department of Orthopaedic Surgery, Japanese Red Cross Nagoya Daiichi Hospital, Nagoya, Aichi, Japan. 8. Department of Orthopaedic Surgery, Konan Kosei Hospital, Konan, Aichi, Japan. 9. Department of Orthopaedic Surgery, Chutoen General Medical Center, Kakegawa, Shizuoka, Japan. 10. Department of Orthopaedic Surgery, Toyohashi Municipal Hospital, Toyohashi, Aichi, Japan. 11. Department of Orthopaedic Surgery, National Center for Geriatrics and Gerontology, Obu, Aichi, Japan. 12. Department of Orthopaedic Surgery, Anjo Kosei Hospital, Anjo, Aichi, Japan.
Abstract
OBJECTIVE: The purpose of this study was retrospectively to analyze the risk factors for non-union in Anderson-D'Alonzo type III odontoid fractures with conservative treatment. METHODS: 25 patients with type III fractures were analyzed. Coronal and sagittal tilt as well as sagittal and lateral mass gaps were measured by using computed tomography. RESULTS: The non-union group had significantly higher age, greater coronal tilt and lateral mass gap. Especially, the lateral mass gap was >2 mm in all cases with non-union. CONCLUSIONS: Higher age, coronal tilt, and lateral mass gap were significant risk factors for non-union.
OBJECTIVE: The purpose of this study was retrospectively to analyze the risk factors for non-union in Anderson-D'Alonzo type III odontoid fractures with conservative treatment. METHODS: 25 patients with type III fractures were analyzed. Coronal and sagittal tilt as well as sagittal and lateral mass gaps were measured by using computed tomography. RESULTS: The non-union group had significantly higher age, greater coronal tilt and lateral mass gap. Especially, the lateral mass gap was >2 mm in all cases with non-union. CONCLUSIONS: Higher age, coronal tilt, and lateral mass gap were significant risk factors for non-union.
Authors: Patrick Platzer; Gerhild Thalhammer; Gerhard Oberleitner; Rupert Schuster; Vilmos Vécsei; Christian Gaebler Journal: J Bone Joint Surg Am Date: 2007-08 Impact factor: 5.284