Allen D Nicholson1, Raymond W Liu2, James O Sanders3, Daniel R Cooperman1. 1. Department of Orthopaedics and Rehabilitation, Yale School of Medicine, P.O. Box 208071, New Haven, CT 06510. E-mail address for A.D. Nicholson: Allen.nicholson@yale.edu. 2. Department of Orthopaedics, Case Western Reserve University School of Medicine, 11100 Euclid Avenue, Cleveland, OH 44106. 3. Department of Orthopaedics, University of Rochester School of Medicine, 601 Elmwood Avenue, Box 665, Rochester, NY 14642.
Abstract
BACKGROUND: Ossification of the calcaneal apophysis has never been fully characterized. We examined the ossification sequence of the calcaneus in relation to ossification of the iliac apophysis and the timing of the peak height velocity (PHV). METHODS: Ninety-four healthy children (forty-nine girls and forty-five boys), from three to eighteen years old, were followed longitudinally through growth with annual serial radiographs and physical examinations. These were done at least annually from ten to fifteen years of age. The PHV was calculated using the height measurements of each child. We measured and compared calcaneal and iliac crest apophyseal ossification using foot and pelvic radiographs made on the same day. We correlated the PHV with the degree of calcaneal and iliac ossification. RESULTS: Ossification of the calcaneal apophysis occurred in an orderly fashion, with the ossification center first appearing a mean of 4.7 years (95% confidence interval [CI], 5.2 to 4.2 years) before the PHV. The apophysis spread across the plantar surface more quickly than the dorsal surface. The apophysis extended completely over the plantar surface a mean of 0.86 year (95% CI, 1.0 to 0.7 year) before the PHV. Fusion of the apophysis followed complete plantar extension over the next two years and was typically complete a mean of 2.1 years (95% CI, 2.0 to 2.2 years) after the PHV. Fusion began in the middle of the apophysis and proceeded outward. Iliac apophyseal ossification did not appear prior to the PHV in any subject. CONCLUSIONS: The calcaneal apophysis ossifies in a consistent fashion characterized by six different stages. The calcaneal stages occur during narrow intervals in relation to the PHV, allowing the calcaneal system to be used for assessment of skeletal maturity. The PHV occurs prior to iliac ossification, whereas the calcaneal apophysis has four stages of ossification before and two stages after the PHV.
BACKGROUND: Ossification of the calcaneal apophysis has never been fully characterized. We examined the ossification sequence of the calcaneus in relation to ossification of the iliac apophysis and the timing of the peak height velocity (PHV). METHODS: Ninety-four healthy children (forty-nine girls and forty-five boys), from three to eighteen years old, were followed longitudinally through growth with annual serial radiographs and physical examinations. These were done at least annually from ten to fifteen years of age. The PHV was calculated using the height measurements of each child. We measured and compared calcaneal and iliac crest apophyseal ossification using foot and pelvic radiographs made on the same day. We correlated the PHV with the degree of calcaneal and iliac ossification. RESULTS: Ossification of the calcaneal apophysis occurred in an orderly fashion, with the ossification center first appearing a mean of 4.7 years (95% confidence interval [CI], 5.2 to 4.2 years) before the PHV. The apophysis spread across the plantar surface more quickly than the dorsal surface. The apophysis extended completely over the plantar surface a mean of 0.86 year (95% CI, 1.0 to 0.7 year) before the PHV. Fusion of the apophysis followed complete plantar extension over the next two years and was typically complete a mean of 2.1 years (95% CI, 2.0 to 2.2 years) after the PHV. Fusion began in the middle of the apophysis and proceeded outward. Iliac apophyseal ossification did not appear prior to the PHV in any subject. CONCLUSIONS: The calcaneal apophysis ossifies in a consistent fashion characterized by six different stages. The calcaneal stages occur during narrow intervals in relation to the PHV, allowing the calcaneal system to be used for assessment of skeletal maturity. The PHV occurs prior to iliac ossification, whereas the calcaneal apophysis has four stages of ossification before and two stages after the PHV.
Authors: Derrick M Knapik; Sahejmeet S Guraya; Keegan T Conry; Daniel R Cooperman; Raymond W Liu Journal: J Child Orthop Date: 2016-11-02 Impact factor: 1.548
Authors: Olivier Materne; Karim Chamari; Abdulaziz Farooq; Adam Weir; Per Hölmich; Roald Bahr; Matt Greig; Lars R McNaughton Journal: Orthop J Sports Med Date: 2021-03-31
Authors: Don T Li; Jonathan J Cui; Stephen DeVries; Allen D Nicholson; Eric Li; Logan Petit; Joseph B Kahan; James O Sanders; Raymond W Liu; Daniel R Cooperman; Brian G Smith Journal: J Pediatr Orthop Date: 2018-10 Impact factor: 2.324