title: Open-Mouth Bone Scintigraphy Is Better than Closed-Mouth Bone Scintigraphy in the Diagnosis of Temporomandibular Osteoarthritis.
abstract: OBJECTIVE
  Closed-mouth bone scintigraphy (CM scan) and closed-mouth single-photon emission computed tomography (CM SPECT) are used for conventional evaluation of osteoarthritis of the temporomandibular joint (TMJ). However, the adequacy of open-mouth bone scintigraphy (OM scan) has not yet been evaluated. Therefore, the purpose of this study was to compare the diagnostic performance of CM scan, CM SPECT, and OM scan.
  
  
  METHODS
  Thirty-six patients with suspicion of an abnormality of the TMJ and who underwent a (99m)Tc-HDP CM scan, CM SPECT, and an OM scan were enrolled. The scans were assessed visually for the presence of positive focal uptake in the TMJ. Osteoarthritis was defined as arthralgia plus crepitus or radiologic signs of arthrosis.
  
  
  RESULTS
  Of 72 TMJs, 21 (29.2 %) were diagnosed with osteoarthritis. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy were 90.5 %, 49.0 %, 42.2 %, 92.6 % and 61.1 % for the CM scan, 81.0 %, 58.8 %, 44.7 %, 88.2 % and 65.3 % for CM SPECT, and 81.0 %, 82.4 %, 65.4 %, 91.3 % and 81.9 % for the OM scan, respectively. The accuracy of the OM scan was higher than that of CM SPECT and the CM scans (p = 0.004 and p < 0.001, respectively).
  
  
  CONCLUSIONS
  The OM scan was more accurate than the conventional CM scan and even CM SPECT for diagnosing TMJ osteoarthritis.
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hospital, 42 Jebong-ro, Donggu Gwangju, 61469 Korea.
authors.forename: Ki Seong
authors.initials: KS
authors.lastname: Park
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hospital, 42 Jebong-ro, Donggu Gwangju, 61469 Korea.
authors.forename: Ho-Chun
authors.initials: HC
authors.lastname: Song
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hospital, 42 Jebong-ro, Donggu Gwangju, 61469 Korea.
authors.forename: Sang-Geon
authors.initials: SG
authors.lastname: Cho
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hospital, 42 Jebong-ro, Donggu Gwangju, 61469 Korea.
authors.forename: Sae-Ryung
authors.initials: SR
authors.lastname: Kang
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hospital, 42 Jebong-ro, Donggu Gwangju, 61469 Korea.
authors.forename: Jahae
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hospital, 42 Jebong-ro, Donggu Gwangju, 61469 Korea.
authors.forename: Haeng Man
authors.initials: HM
authors.lastname: Jun
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Korea.
authors.forename: Minchul
authors.initials: M
authors.lastname: Song
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Korea.
authors.forename: Geum-Cheol
authors.initials: GC
authors.lastname: Jeong
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Korea.
authors.forename: Hee Jeong
authors.initials: HJ
authors.lastname: Park
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Korea.
authors.forename: Seong Young
authors.initials: SY
authors.lastname: Kwon
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Korea.
authors.forename: Jung-Joon
authors.initials: JJ
authors.lastname: Min
authors.affiliation: Department of Nuclear Medicine, Chonnam National University Hwasun Hospital, Hwasun-gun, Korea.
authors.forename: Henry Hee-Seung
authors.initials: HH
authors.lastname: Bom
keywords: Bone scan; Bone scintigraphy; Open mouth; Osteoarthritis; Temporomandibular joint