title: [Sagittal mobility study on the first tarsometatarsal joint in hallux valgus patients and its clinical values].
abstract: OBJECTIVE
  To study sagittal mobility about the FTJ (first tarsometatarsal joint) and its relationship with the pathophysiology and treatment of hallux valgus patients.
  
  
  METHODS
  According to Lee's method, FTJ sagittal mobility of 300 normal feet and 200 hallux valgus was measured, and its correlative factors were statistically analysed.
  
  
  RESULTS
  FTJ sagittal mobility of 300 normal feet was 8.4 degrees +/- 2.3 degrees , and that of 200 hallux valgus was 11.7 degrees +/- 3.2 degrees , the difference was significant. The normal range of FTJ sagittal mobility was less than 13 degrees . The sagittal overmotion of FTJ had relation to the anatomical configuration of FTJ (P < 0.05), intercuneiform splitting (P < 0.01), transferred pain under the second metatarsal head (P < 0.01), and FTJ osteoarthritis (P < 0.01) had no relation to HVA (hallux valgus angle), IMA (intermetatarsal angle), second metatarsus medial diaphyseal cortex hypertrophy (P > 0.05).
  
  
  CONCLUSIONS
  Lee's method is convenient and accurate. Both HVA and IMA can not represent the sagittal mobility measurement of FTJ, which should be routinely evaluated, especially for hallux valgus patients with type I FTJ. Lapidus procedure should be considered for patients with larger FTJ in combination with transferred pain under the second metatarsal head, intercuneiform splitting, FTJ osteoarthritis.
authors.affiliation: Department of Orthopaedics, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China. guijianchao@yahoo.com
authors.forename: Jian-Chao
authors.initials: JC
authors.lastname: Gui
authors.forename: Xiang-Jie
authors.initials: XJ
authors.lastname: Gu
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Wang
authors.forename: Hai-Qi
authors.initials: HQ
authors.lastname: Shen
authors.forename: Zhong
authors.initials: Z
authors.lastname: Yu
authors.forename: Xin
authors.initials: X
authors.lastname: Ma
authors.forename: Jin-Song
authors.initials: JS
authors.lastname: Chen
authors.forename: Xu
authors.initials: X
authors.lastname: Wang
authors.forename: He
authors.initials: H
authors.lastname: Huang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006215:Hallux Valgus / Q000175:diagnosis* / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008683:Metatarsophalangeal Joint / Q000502:physiology* / Q000601:surgery; D008875:Middle Aged; D010027:Osteotomy / Q000379:methods; D016059:Range of Motion, Articular