Mandibular morphological changes in low bone mass edentulous females: evaluation of panoramic radiographs.
OBJECTIVE
The objective of this study was to evaluate morphological changes of the mandible in osteopenic and osteoporotic edentulous females.


METHODS
Fifty-two female edentulous patients underwent panoramic radiography and dual-energy x-ray absorptiometry of the lumbar spine and femoral neck. Measurements of the gonial angle, antegonial angle, antegonial depth, antegonial index (AI), and mental index (MI) were performed. Patients were classified as normal (T-score > -1.0), osteopenic (T-score of -1.0 to 0 -2.5), or osteoporotic (T-score < -2.5).


RESULTS
The gonial angle did not show differences among the three categories of skeletal bone status (P > .05). The antegonial angle was significantly smaller in individuals with low bone mass (P < .05). The antegonial depth was significantly greater in osteoporotic (P < .05) and osteopenic individuals (P < .05). The AI and MI were significantly smaller in individuals with low bone mass (P < .05); however, after age adjustment there were no differences among the groups (P > .05).


CONCLUSIONS
Edentulous females with low bone mass have a deeper antegonial region. The thickness of the cortical mandibular bone is highly influenced by age.
Dutra
Vinicius
V
Department of Diagnostic Imaging, School of Medicine, Federal University of Sao Paulo, SP, Brazil. cdiodontologia@terra.com.br <cdiodontologia@terra.com.br>
Devlin
Hugh
H
Susin
Cristiano
C
Yang
Jie
J
Horner
Keith
K
Fernandes
Artur Rocha Corrêa
AR
D015502:Absorptiometry, Photon; D000328:Adult; D000367:Age Factors; D000368:Aged; D015519:Bone Density; D001851:Bone Diseases, Metabolic / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D016022:Case-Control Studies; D002508:Cephalometry; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging; D006801:Humans; D016015:Logistic Models; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology*; D008336:Mandibular Diseases / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D008875:Middle Aged; D009066:Mouth, Edentulous / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D015663:Osteoporosis, Postmenopausal / Q000150:complications / Q000000981:diagnostic imaging / Q000473:pathology*; D011862:Radiography, Panoramic; D015203:Reproducibility of Results