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Medicine (Baltimore) ; 99(9): e19328, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32118764


We assessed factors associated with premature physeal closure (PPC) and outcomes after closed reduction of Salter-Harris type II (SH-II) fractures of the distal tibia. We reviewed patients with SH-II fractures of the distal tibia treated at our center from 2010 to 2015 with closed reduction and a non-weightbearing long-leg cast. Patients were categorized by immediate postreduction displacement: minimal, <2 mm; moderate, 2 to 4 mm; or severe, >4 mm. Demographic data, radiographic data, and Lower Extremity Functional Scale (LEFS) scores were recorded.Fifty-nine patients (27 girls, 31 right ankles, 26 concomitant fibula fractures) were included, with a mean (±SD) age at injury of 12.0 ±â€Š2.2 years. Mean maximum fracture displacements were 6.6 ±â€Š6.5 mm initially, 2.7 ±â€Š2.0 mm postreduction, and 0.4 ±â€Š0.7 mm at final follow-up. After reduction, displacement was minimal in 23 patients, moderate in 21, and severe in 15. Fourteen patients developed PPC, with no significant differences between postreduction displacement groups. Patients with high-grade injury mechanisms and/or initial displacement ≥4 mm had 12-fold and 14-fold greater odds, respectively, of PPC. Eighteen patients responded to the LEFS survey (mean 4.0 ±â€Š2.1 years after injury). LEFS scores did not differ significantly between postreduction displacement groups (P = .61).The PPC rate in this series of SH-II distal tibia fractures was 24% and did not differ by postreduction displacement. Initial fracture displacement and high-grade mechanisms of injury were associated with PPC. LEFS scores did not differ significantly by postreduction displacement.Level of Evidence: Level IV, case series.

Fijación de Fractura/normas , Fracturas de Salter-Harris/terapia , Adolescente , Niño , Femenino , Fijación de Fractura/métodos , Fijación de Fractura/estadística & datos numéricos , Humanos , Masculino , Complicaciones Posoperatorias/diagnóstico , Complicaciones Posoperatorias/diagnóstico por imagen , Estudios Retrospectivos , Tibia/anatomía & histología , Tibia/lesiones , Tibia/fisiopatología , Resultado del Tratamiento
J Pediatr Orthop ; 38(4): e207-e212, 2018 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-29356793


BACKGROUND: It is important to estimate the likelihood that a pediatric fracture is caused by osteogenesis imperfecta (OI), especially the least severe type of OI (type 1). METHODS: We reviewed records of 29,101 pediatric patients with fractures from 2003 through 2015. We included patients with closed fractures not resulting from motor vehicle accidents, gunshot wounds, nonaccidental trauma, or bone lesions. Patients with OI of any type were identified through International Classification of Diseases-9 code. We randomly sampled 500 pediatric patients in whom OI was not diagnosed to obtain a control (non-OI) group. We reviewed age at time of fracture, sex, fracture type, laterality, and bone and bone region fractured. Bisphosphonate use and OI type were documented for OI patients. Subanalysis of patients with type-1 OI was performed. The Fisher exact and χ tests were used to compare fracture rates between groups. P<0.05 was considered significant. Positive likelihood ratios for OI were calculated by fracture pattern. RESULTS: The non-OI group consisted of 500 patients with 652 fractures. The OI group consisted of 52 patients with 209 fractures. Non-OI patients were older at the time of fracture (mean, 9.0±5.0 y) than OI patients (mean, 5.5±4.4 y) (P<0.001). OI patients had more oblique, transverse, diaphyseal, and bilateral long-bone fractures than non-OI patients (all P<0.001). Non-OI patients had more buckle (P=0.013), metaphyseal (P<0.001), and physeal (P<0.001) fractures than OI patients. For patients with type-1 OI and long-bone fractures (n=18), rates of transverse and buckle fractures were similar compared with controls. Transverse humerus (15.2), olecranon (13.8), and diaphyseal humerus (13.0) fractures had the highest positive likelihood ratios for OI, and physeal (0.09) and supracondylar humerus (0.1) fractures had the lowest. CONCLUSIONS: Transverse and diaphyseal humerus and olecranon fractures were most likely to indicate OI. Physeal and supracondylar humerus fractures were least likely to indicate OI. Radiographic fracture pattern is useful for estimating likelihood of OI. LEVEL OF EVIDENCE: Level III.

Fracturas Óseas/etiología , Osteogénesis Imperfecta/complicaciones , Osteogénesis Imperfecta/epidemiología , Adolescente , Estudios de Casos y Controles , Distribución de Chi-Cuadrado , Niño , Preescolar , Femenino , Fracturas Óseas/epidemiología , Fracturas Óseas/patología , Humanos , Masculino , Osteogénesis Imperfecta/diagnóstico , Estudios Retrospectivos
Prosthet Orthot Int ; 40(3): 400-3, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-25934422


BACKGROUND AND AIM: Upper extremity myoelectric prostheses are expensive. The Robohand demonstrated that three-dimensional printing reduces the cost of a prosthetic extremity. The goal of this project was to develop a novel, inexpensive three-dimensional printed prosthesis to address limitations of the Robohand. TECHNIQUE: The prosthesis was designed for patients with transradial limb amputation. It is shoulder-controlled and externally powered with an anthropomorphic terminal device. The user can open and close all five fingers, and move the thumb independently. The estimated cost is US$300. DISCUSSION: After testing on a patient with a traumatic transradial amputation, several advantages were noted. The independent thumb movement facilitated object grasp, the device weighed less than most externally powered prostheses, and the size was easily scalable. Limitations of the new prosthetic include low grip strength and decreased durability compared to passive prosthetics. CLINICAL RELEVANCE: Most children with a transradial congenital or traumatic amputation do not use a prosthetic. A three-dimensional printed shoulder-controlled robotic prosthesis provides a cost effective, easily sized and highly functional option which has been previously unavailable.

Amputados/rehabilitación , Impresión Tridimensional , Diseño de Prótesis/métodos , Robótica , Miembros Artificiales/economía , Ingeniería Biomédica/métodos , Análisis Costo-Beneficio , Humanos , Radio (Anatomía)/cirugía