Two articles on PainSci cite MacIntyre 2006: 1. The Complete Guide to Patellofemoral Pain Syndrome 2. Patellofemoral Tracking Syndrome
original abstract †Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.
BACKGROUND: Patellofemoral pain syndrome is a prevalent condition in young people. While it is widely believed that abnormal patellar tracking plays a role in the development of patellofemoral pain syndrome, this link has not been established. The purpose of this cross-sectional case-control study was to test the hypothesis that patterns of patellar spin, tilt, and lateral translation make it possible to distinguish individuals with patellofemoral pain syndrome and clinical evidence of patellar malalignment from those with patellofemoral pain syndrome and no clinical evidence of malalignment and from individuals with no knee problems.
METHODS: Three-dimensional patellofemoral joint kinematics in one knee of each of sixty volunteers (twenty in each group described above) were assessed with use of a new, validated magnetic resonance imaging-based method. Static low-resolution scans of the loaded knee were acquired at five different angles of knee flexion (ranging between -4 degrees and 60 degrees). High-resolution geometric models of the patella, femur, and tibia and associated coordinate axes were registered to the bone positions on the low-resolution scans to determine the patellar motion as a function of knee flexion angle. Hierarchical modeling was used to identify group differences in patterns of patellar spin, tilt, and lateral translation.
RESULTS: No differences in the overall pattern of patellar motion were observed among groups (p>0.08 for all global maximum likelihood ratio tests). Features of patellar spin and tilt patterns varied greatly between subjects across all three groups, and no significant group differences were detected. At 19 degrees of knee flexion, the patellae in the group with patellofemoral pain and clinical evidence of malalignment were positioned an average of 2.25 mm more laterally than the patellae in the control group, and this difference was marginally significant (p=0.049). Other features of the pattern of lateral translation did not differ, and large overlaps in values were observed across all groups.
CONCLUSIONS: It cannot be determined from our cross-sectional study whether the more lateral position of the patella in the group with clinical evidence of malalignment preceded or followed the onset of symptoms. It is clear from the data that an individual with patellofemoral pain syndrome cannot be distinguished from a control subject by examining patterns of spin, tilt, or lateral translation of the patella, even when clinical evidence of mechanical abnormality was observed.
- “The reliability and validity of assessing medio-lateral patellar position: a systematic review,” Toby O Smith, Leigh Davies, and Simon T Donell, Manual Therapy, 2009.
- “Q-angle in patellofemoral pain: relationship with dynamic knee valgus, hip abductor torque, pain and function,” Gabriel Peixoto Leão Almeida, Ana Paula de Moura Campos Carvalho E Silva, Fábio Jorge Renovato França, Maurício Oliveira Magalhães, Thomaz Nogueira Burke, and Amélia Pasqual Marques, Rev Bras Ortop, 2016.
- “Patellar maltracking is prevalent among patellofemoral pain subjects with patella alta: An upright, weightbearing MRI study,” Saikat Pal, Thor F Besier, Gary S Beaupre, Michael Fredericson, Scott L Delp, and Garry E Gold, Journal of Orthopaedic Research, 2013.
- “Patello-femoral tracking in the weight-bearing knee: a study of asymptomatic volunteers utilising dynamic magnetic resonance imaging: a preliminary report,” S Tennant, A Williams, V Vedi, C Kinmont, W Gedroyc, and D M Hunt, Knee Surgery, Sports Traumatology, Arthroscopy, 2001.
- “Associates of physical function and pain in patients with patellofemoral pain syndrome,” Sara R Piva, G Kelley Fitzgerald, James J Irrgang, Julie M Fritz, Stephen Wisniewski, Gerald T McGinty, John D Childs, Manuel A Domenech, Scott Jones, and Anthony Delitto, Archives of Physical Medicine & Rehabilitation, 2009.
- “The role of patellar alignment and tracking in vivo: the potential mechanism of patellofemoral pain syndrome,” Chen-Yi Song, Jiu-Jenq Lin, Mei-Hwa Jan, and Yeong-Fwu Lin, Physical Therapy in Sport, 2011.
This page is part of the PainScience BIBLIOGRAPHY, which contains plain language summaries of thousands of scientific papers & others sources. It’s like a highly specialized blog. A few highlights:
- No long-term effects after a three-week open-label placebo treatment for chronic low back pain: a three-year follow-up of a randomized controlled trial. Kleine-Borgmann 2022 Pain.
- Exercise and education versus saline injections for knee osteoarthritis: a randomised controlled equivalence trial. Bandak 2022 Ann Rheum Dis.
- Association of Lumbar MRI Findings with Current and Future Back Pain in a Population-based Cohort Study. Kasch 2022 Spine (Phila Pa 1976).
- A double-blinded randomised controlled study of the value of sequential intravenous and oral magnesium therapy in patients with chronic low back pain with a neuropathic component. Yousef 2013 Anaesthesia.
- Is Neck Posture Subgroup in Late Adolescence a Risk Factor for Persistent Neck Pain in Young Adults? A Prospective Study. Richards 2021 Phys Ther.