The impact of reduced general bone mineral density on cortical bone of the edentulous mandible

Laura Jakaite, Anastasija Beibakova, Laura Neimane, Anda Slaidiņa, Oskars Radziņš, Ivars Namatevs, Kaspars Sudars

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Purpose/Objectives: The aim of this study was to detect impact of reduced
general bone mineral density (BMD) on mandibular cortical bone thickness in
edentulous postmenopausal females.
Methods and materials: In the present study 64 edentulous females were
included, aged 54-87 years (mean age 70.4 ± 8.4y) who undertook cone beam
computed tomography (CBCT) investigation (Next generation i-CAT) for implant
Both femoral neck and lumbar spine BMD measurements were done by dual
energy X-ray absorptiometry (DXA). The worst T-score reading from both was
included. Patients were divided into 3 groups according to DXA results: normal
BMD (T-score ≥ -1.0), osteopenia (T-score < -1.0 to -2.5) and osteoporosis
(T-score ≤ -2.5).
CBCT images were analyzed with OnDemand3D software. In cross-sectional
CBCT images, three areas of the mandible (lateral incisor, frst premolar,
frst molar) were selected to determine vestibular and lingual cortical bone
thickness. In the mental foramen region inferior cortical width of the mandible
was measured.
To detect the differences between groups One-way ANOVA was used.
Result: Based on the DXA results, patients were stratifed into 3 groups: normal
BMD -18 (mean age 70.39±9.3y), osteopenia- 28 (mean age 70.29±8.23y) and
18 (mean age 70.56±8.2y) had osteoporosis (p=0.995).
The vestibular cortical bone width at incisive and premolar regions in
osteoporosis and osteopenia groups was found to be less than in normal BMD
group: osteoporosis (1.26 ± 0.32mm), osteopenia (1.36±0.39mm), normal
BMD (1.79±0.59mm); p=0.001; osteoporosis (1.40±0.38mm), osteopenia
(1.42±0.38mm), normal BMD (1.76±0.48mm), p=0.013.
Osteoporosis group also showed reduced inferior cortical bone thickness
in the region of mental foramina: osteoporosis (2.63±0.73mm), osteopenia
(3.38±1.17mm), normal BMD (3.09±0.72mm), p=0.039.
There was no statically signifcant difference between the groups according
to vestibular cortical bone thickness in molar region and lingual cortical bone
thickness in all regions of mandible.
Conclusion: Postmenopausal females with reduced BMD showed reduced
cortical bone thickness in the edentulous mandible.
Funding: This work was supported by the “Fundamental and Applied Research
Projects”, grant number: lzp-2021/1-0031
Original languageEnglish
Pages (from-to)17-17
Number of pages1
JournalInsights into Imaging
Issue numberSuppl.3
Publication statusPublished - 6 Oct 2022
Event34th Annual Meeting and Refresher Course of the European Society of Head and Neck Radiology (ESHNR - Online
Duration: 6 Oct 20228 Oct 2022
Conference number: 34

Field of Science*

  • 3.2 Clinical medicine

Publication Type*

  • 3.4. Other publications in conference proceedings (including local)


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