Members
Jon Davids
Assistant Chief of Orthopaedics
Medical Director Motion Analysis Center
2425 Stockton Blvd., Sacramento, CA 95817
(916) 453-2049
jdavids (at) shrinenet.org
Education
- B.A. Latin American Studies, Brown University
- Doctor of Medicine, Harvard Medical School
- Internship/Residency (Surgery/Orthopaedic Surgery) Univ. of Colorado Affiliated Hospitals, Denver, CO
- Fellowship, (Pediatric Orthopaedics) Children’s Hospital & Health Center San Diego
Research Interests
My primary research interests are in biomechanics, particularly the application of quantitative movement analysis technologies. I have focused on the utilization of kinematics, kinetics, dynamic EMG, pedobarography, and energetics in clinical decision making, outcomes assessment, and biomechanical modeling.
Current Research
- Multi-Center: Investigator in the CP Hip Outcomes Project (CHOP) which aims to investigate the health-related quality of life outcomes of hip interventions for children with severe cerebral palsy using a prospective longitudinal comparative cohort design. It is an international multi-centre study involving investigators in orthopaedic surgery, developmental pediatrics, and outcome measurement.
- Single Center: Muscle Strength and Function following SEMLS Surgery in children with Cerebral Palsy
- Non-conventional Genomic Risk Factors of Cerebral Palsy associated with Prematurity
- Radiographic Assessment of Bone Age in Children with Cerebral Palsy
- Management of Severe Equinus Deformity in Children with Cerebral Palsy
- Quantitative Assessment of Joint Contribution to Limb Shortening in Children with Cerebral Palsy
- Validity, Reliability, and Efficiency of Software Enhanced Acquisition of the Edinburgh Visual Gait Score
- The role of the triceps surae during gait in boys with Duchenne Muscular Dystrophy: The impact of tendo-achilles lengthening’s
- Cerebral Palsy Hip Outcomes Project – International Multi-centre Study
- Radiographic, Kinematic, and Kinetic Analysis of Foot Structure and Function in Children with Persistent Idiopathic Toe Walking (ITW)
- Patella Alta in Children with Cerebral Palsy: Prevalence and Functional Significance
- Correlation of Selective Voluntary Motor Control and Gait Deviations in Children with Cerebral Palsy
- Quantitative Assessment of Walker Use during Gait
- Quantitative Assessment of Kinematic Gait Variability in Children with Cerebral Palsy
- Relationship between Motor Level and Physical Function in Children with Myelomeningocele
Noteworthy Publications
| TITLE | AUTHOR(s) | YEAR | DOWNLOAD |
| Reliability of Radiographic Assessments of the Hip in Cerebral Palsy. J Pediatr Orthop.;39(7):e536-e541. 2019 Aug | Shore BJ, Martinkevich P, Riazi M, Baird E, Encisa C, Willoughby K, Narayanan UG3, Davids JR, Eastwood D, Graham HK, Givon U, Hagglund G, Jozwiak M, Matsumoto H, Montpetit K, Mulpuri K, Novacheck T, Park MS, Ponten E, Shrader W, Stott S, Theologis T, Truong W. | 2019 | HTML |
| Quantitative Assessment of Muscle Strength Following “Slow” Surgical Lengthening of the Medial Hamstring Muscles in Children With Cerebral Palsy. J Pediatr Orthop;e373-379. 2019 | Davids JR, Cung NQ, Sattler K, Boakes JL, Bagley AM. | 2019 | HTML |
| Quantitative gait analysis: assessment of interobserver reliability. Dev Med Child Neurol, 61: 622-630. 2019 | Davids JR. | 2019 | HTML |
| Outcomes of Preoperative Versus Postoperative Radiation for Heterotopic Ossification Prevention in Children With Neuromuscular Hip Dysplasia Undergoing Proximal Femoral Resection. J Pediatr Orthop.;39:e102-e107, 2019 | Hess CB, Stein-Wexler R, Qi L, Davids JR, Fragoso RC. | 2019 | HTML |
| Management of Neuromuscular Hip Dysplasia in Children With Cerebral Palsy: Lessons and Challenges. J Pediatr Orthop. 38 Suppl 1:S21-S27. 2018 Jul | Davids JR. | 2018 | HTML |
| Reliability and Efficiency of Three Methods of Calculating Migration Percentage on Radiographs of Hip Surveillance in Children with Cerebral Palsy. J Child Orthop 2018; 12:145-151. 2018 | Kulkarni VA, Davids JR, Boyles AD, Cung NQ, Bagley A. | 2018 | HTML |
| Proximal femoral focal deficiency (PFFD): Management options and controversies. HIP INT 19; Suppl 6: 218-25, 2009. | Westberry DE, Davids JR | 2018 | HTML |
| Adult outcomes following amputation or lengthening for fibular deficiency. J BONE JOINT SURG 91A:797-804, 2009 | Walker JL, Knapp D, Minter C, Boakes JL, Salazar JC, Sanders JO, Lubicky JP, Drvaric DM, Davids JR | 2018 | HTML |
| Quantitative Assessment of Knee Progression Angle During Gait in Children With Cerebral Palsy. J Pediatr Orthop. 2018 Jan 31. [Epub ahead of print] | Davids JR, Cung NQ, Pomeroy R, Schultz B, Torburn L, Kulkarni VA, Brown S, Bagley AM. | 2018 | HTML |
| Outcomes of Preoperative Versus Postoperative Radiation for Heterotopic Ossification Prevention in Children With Neuromuscular Hip Dysplasia Undergoing Proximal Femoral Resection. J Pediatr Orthop. 2017 Oct 24. [Epub ahead of print] | Hess CB, Stein-Wexler R, Qi L, Davids JR, Fragoso RC. | 2017 | HTML |
| Guided Growth of the Proximal Femur for the Management of Hip Dysplasia in Children With Cerebral Palsy. J Pediatr Orthop. 2017 Sep 8. [Epub ahead of print] | Portinaro N, Turati M, Cometto M, Bigoni M, Davids JR, Panou A. | 2017 | HTML |
| Control of Walking Speed in Children with Cerebral Palsy. J Pediatr Orthop. 2017 Mar 21. [Epub ahead of print] | Davids JR, Cung NQ, Chen S, Sison-Williamson M, Bagley AM. | 2017 | HTML |
| Correlation Between Standard Upper Extremity Impairment Measures and Activity-based Function Testing in Upper Extremity Cerebral Palsy. J Pediatr Orthop. 2017 Mar;37(2):102-106. | James MA, Bagley A, Vogler JB 4th, Davids JR, Van Heest AE. | 2017 | HTML |
| Correction of Tibial Torsion in Children With Cerebral Palsy by Isolated Distal Tibia Rotation Osteotomy: A Short-term, In Vivo Anatomic Study. J Pediatr Orthop. 2016 Oct-Nov;36(7):743-8. | Andrisevic E, Westberry DE, Pugh LI, Bagley AM, Tanner S, Davids JR. | 2016 | HTML |
| Outcomes of Cutaneous Scar Revision During Surgical Implant Removal in Children with Cerebral Palsy. J Bone Joint Surg Am. 2016 Aug 17;98(16):1351-8. | Davids JR, Diaz K, Leba TB, Adams S, Westberry DE, Bagley AM. | 2016 | HTML |
| Selective Control of the Upper Extremity Scale: validation of a clinical assessment tool for children with hemiplegic cerebral palsy. Dev Med Child Neurol. 2016 Jun;58(6):612-7. | Wagner, L. V., Davids, J. R. and Hardin, J. W. | 2016 | HTML |
| Selective Control of the Upper Extremity Scale: validation of a clinical assessment tool for children with hemiplegic cerebral palsy. Developmental Medicine & Child Neurology. doi: 10.1111/dmcn.12949 | Wagner, L. V., Davids, J. R. and Hardin, J. W. | 2015 | HTML |
| Correlation Between Standard Upper Extremity Impairment Measures and Activity-based Function Testing in Upper Extremity Cerebral Palsy.J Pediatr Orthop. 2015 Jul 14. [Epub ahead of print] | James MA, Bagley A, Vogler JB 4th, Davids JR, Van Heest AE. | 2015 | HTML |
| Relationship of Strength, Weight, Age, and Function in Ambulatory Children With Cerebral Palsy. J Pediatr Orthop. 2015 Jul-Aug;35(5):523-9. | Davids JR, Oeffinger DJ, Bagley AM, Sison-Williamson M, Gorton G. | 2015 | HTML |
| Three-dimensional Computed Tomography for Determination of Femoral Anteversion in a Cerebral Palsy Model. J Pediatr Orthop. 2015 Mar;35(2):167-71. | Riccio AI, Carney CJ, Hammel LN, Stanley M, Cassidy J, Davids JR. | 2015 | HTML |
| Identification of Common Gait Disruption Patterns in Children With Cerebral Palsy. J Am Acad Orthop Surg 22:782-790, 2014. | Davids JR, Bagley AM. | 2014 | HTML |
| Surgical Management of Persistent Intoeing Gait Due to Increased Internal Tibial Torsion in Children. J Pediatr Orthop 34:467-473, 2014 | Davids JR, Davis RB, Jameson LC, Westberry DE, Hardin JW. | 2014 | HTML |
| Central Polydactyly of the Foot: Surgical Management with Plantar and Dorsal Advancement Flaps. J Pediatr Orthop 34:346-351, 2014 | Osborn EJ, Davids JR, Leffler LC, Gibson TW, Pugh LI. | 2014 | HTML |
| The Boyd Amputation in Children: Indications and Outcomes. J Pediatr Orthop. 2014 Jan;34(1):86-91 | Westberry DE, Davids JR, Pugh LI. | 2014 | HTML |
| The operative correction of symptomatic flat foot deformity in children: the relationship between static alignment and dynamic loading. Bone Joint J 95-B:706-713, 2013. | Westberry DE, Davids JR, Anderson JP, Pugh LI, Davis RB, Hardin JW. | 2013 | HTML |
| Proximal femoral geometry before and after varus rotational osteotomy in children with cerebral palsy and neuromuscular hip dysplasia. J Pediatr Orthop. 2013 Mar;33(2):182-9. | Davids JR, Gibson TW, Pugh LI, Hardin JW. | 2013 | HTML |
| Ankle dorsiflexor function after plantar flexor surgery in children with cerebral palsy. J BONE JOINT SURG 93A:e1381-7, 2011. | Davids JR, Rogozinski BM, Hardin JW, Davis RB. | 2011 | HTML |
| Translation step-cut osteotomy for the treatment of posttraumatic cubitus varus. J PEDIATR ORTHOP 31:353-365, 2011. | Davids JR, Lamoreaux DC, Brooker RC, Tanner SL, Westberry DE. | 2011 | HTML |
| Functional outcomes following single-event multilevel surgery of the upper extremity for children with hemiplegic cerebral palsy. J BONE JOINT SURG 93A:655-661, 2011. | Smitherman JA, Davids JR, Tanner S, Hardin JW, Wagner LV, Peace LC, Gidewall MA. | 2011 | HTML |
| The foot and ankle in cerebral palsy. OTHOP CLIN NORTH AM 41(4);579-593, 2010. | Davids, JR. | 2010 | HTML |
| Removal of deep extremity implants in children. J BONE JOINT SURG 92B:1006-1012, 2010. | Davids JR, Hydorn C, Dillingham C, Hardin JW, Pugh LI. | 2010 | HTML |
| Reference accuracy in peer-reviewed pediatric orthopaedic literature. J BONE JOINT SURG 92A:1155-1161, 2010. | Davids JR, Weigl DM, Edmonds JP, Blackhurt DW. | 2010 | HTML |
| The efficacy of the floor-reaction ankle-foot orthosis in children with cerebral palsy. J BONE JOINT SURG 91A:2440-2447, 2009. | Rogozinski BM, Davids JR, Ravis RB, Jameson GG, Blackhurst DW. | 2009 | HTML |
| Surgical management of thumb deformity in children with hemiplegic-type cerebral palsy. J PEDIATR ORTHOP 29:504-510, 2009. | Davids JR, Sabesan VJ, Ortmann F, Wagner LV, Peace LC, Gidewall MA, Blackhurst DW. | 2009 | HTML |