PMID- 7820242
OWN - NLM
STAT- MEDLINE
DCOM- 19950216
LR  - 20170214
IS  - 1071-1007 (Print)
IS  - 1071-1007 (Linking)
VI  - 15
IP  - 9
DP  - 1994 Sep
TI  - The influence of x-ray orientation on the first metatarsocuneiform joint angle.
PG  - 495-7
AB  - The purpose of this study was to determine whether the first metatarsocuneiform 
      (MC) joint angle is affected by the orientation of the x-ray beam, whether it can 
      be reliably measured, and, therefore, whether it is a valid indication of 
      tarsometatarsal fusion as an adjunct to hallux valgus surgery. Each of seven 
      cadaver feet were loaded to 350 newtons in a Plexiglas apparatus that maintained 
      the foot in a plantigrade position. The loading apparatus was positioned to 
      simulate a 10 degrees, 20 degrees, and 30 degrees dorsal angulation of the x-ray 
      beam. At each position, simulated weight-bearing radiographs were obtained for 
      each foot. Three observers independently measured the first MC angle and the 
      first intermetatarsal (IM) angle on all the radiographs. The data collected were 
      analyzed by the components of variance. The inclination of the first MC joint 
      lessons significantly as the orientation of the x-ray beam changes from a 10 
      degrees to a 20 degrees tilt. The three examiners' mean MC angles and mean IM 
      angles from the three sets of radiographs were not statistically different from 
      each other, implying that there were minimal examiner-to-examiner differences in 
      measuring these angles. There were no significant differences in measurements 
      between examiners, suggesting that the first MC and first IM angles can be 
      measured reliably. There was a significant difference in the first MC angle, with 
      different orientations of the foot with respect to the x-ray beam, suggesting 
      that this angular measurement should not be used as an indication for 
      tarsometatarsal arthrodesis.
FAU - Brage, M E
AU  - Brage ME
AD  - Department of Orthopaedic Surgery, University of Washington, Harborview Medical 
      Center, Seattle.
FAU - Holmes, J R
AU  - Holmes JR
FAU - Sangeorzan, B J
AU  - Sangeorzan BJ
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Foot Ankle Int
JT  - Foot & ankle international
JID - 9433869
SB  - IM
MH  - Ankle/*diagnostic imaging
MH  - Cadaver
MH  - Foot/*diagnostic imaging
MH  - Humans
MH  - Radiography
MH  - Tarsal Joints/*diagnostic imaging
EDAT- 1994/09/01 00:00
MHDA- 1994/09/01 00:01
CRDT- 1994/09/01 00:00
PHST- 1994/09/01 00:00 [pubmed]
PHST- 1994/09/01 00:01 [medline]
PHST- 1994/09/01 00:00 [entrez]
AID - 10.1177/107110079401500907 [doi]
PST - ppublish
SO  - Foot Ankle Int. 1994 Sep;15(9):495-7. doi: 10.1177/107110079401500907.