PMID- 15371318
OWN - NLM
STAT- MEDLINE
DCOM- 20041116
LR  - 20071115
IS  - 0250-832X (Print)
IS  - 0250-832X (Linking)
VI  - 33
IP  - 3
DP  - 2004 May
TI  - Trabecular alveolar bone microarchitecture in the human mandible using high 
      resolution magnetic resonance imaging.
PG  - 177-82
AB  - OBJECTIVES: Cancellous bone microarchitecture in the mandible can influence the 
      success of dental implant osseointegration. The aims of this study were to 
      explore the feasibility of two-dimensional (2D) high resolution magnetic 
      resonance imaging (MRI) for the evaluation of trabecular bone architecture and to 
      compare architecture parameters derived from MR images between different areas in 
      the mandible, and between sex and dental status. METHODS: 45 mandibular bone 
      specimens (8 mm thickness) were cut from 15 fresh cadavers. MR images were 
      obtained at 2 T using a multislice 2D spin-echo sequence. After MR image 
      binarization, histomorphometry parameters, i.e. bone area fraction (BAF), 
      specific perimeter (La), trabecular bone width (Tb.Wi), trabecular bone 
      separation (Tb.Sp) and trabecular network anisotropy (R), were computed from the 
      mean intercept length. The angle between trabeculae and tooth axis and the 
      Euler-Poincare characteristics (EPCs) were also computed. RESULTS: BAF, Tb.Wi and 
      R were significantly higher in male specimens compared with female specimens, 
      whereas Tb.Sp was significantly lower. The apparent Tb.Wi was found to be 
      significantly higher in dentate specimens compared with edentulous ones. The 
      highest anisotropy, corresponding to the smallest R value, was seen in the 
      incisal specimens. The preferential orientation of the trabeculae was close to 
      perpendicular to the tooth axis, especially in the molar specimens. CONCLUSION: 
      BAF, La, Tb.Wi, Tb.Sp and R, the most variable parameters, may potentially have a 
      relationship with the biomechanical competence of trabecular bone and play a role 
      both in primary stabilization of dental implant and the time needed before 
      loading.
FAU - Choel, L
AU  - Choel L
AD  - Laboratorie de RMN, CNRS UMR 5012, Departement des Sciences Anatomiques, Faculte 
      d'Odontologie, Universite Claude Bernard Lyon I, France. choel@univ-lyon1.fr
FAU - Last, D
AU  - Last D
FAU - Duboeuf, F
AU  - Duboeuf F
FAU - Seurin, M J
AU  - Seurin MJ
FAU - Lissac, M
AU  - Lissac M
FAU - Briguet, A
AU  - Briguet A
FAU - Guillot, G
AU  - Guillot G
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - England
TA  - Dentomaxillofac Radiol
JT  - Dento maxillo facial radiology
JID - 7609576
MH  - Absorptiometry, Photon
MH  - Aged
MH  - Aged, 80 and over
MH  - Alveolar Process/*ultrastructure
MH  - Bicuspid
MH  - Bone Density/*physiology
MH  - Cadaver
MH  - Dentition
MH  - Feasibility Studies
MH  - Female
MH  - Humans
MH  - Image Enhancement/methods
MH  - Image Processing, Computer-Assisted/methods
MH  - Incisor
MH  - Jaw, Edentulous/pathology
MH  - Magnetic Resonance Imaging/*methods
MH  - Male
MH  - Mandible/*ultrastructure
MH  - Middle Aged
MH  - Molar
MH  - Sex Factors
EDAT- 2004/09/17 05:00
MHDA- 2004/11/17 09:00
CRDT- 2004/09/17 05:00
PHST- 2004/09/17 05:00 [pubmed]
PHST- 2004/11/17 09:00 [medline]
PHST- 2004/09/17 05:00 [entrez]
AID - 33/3/177 [pii]
AID - 10.1259/dmfr/42933309 [doi]
PST - ppublish
SO  - Dentomaxillofac Radiol. 2004 May;33(3):177-82. doi: 10.1259/dmfr/42933309.