| 1. |
- Hassani-Nejad, Azar, et al.
(författare)
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Mandibular trabecular bone as fracture indicator in 80-year-old men and women.
- 2013
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Ingår i: European journal of oral sciences. - : Wiley. - 1600-0722 .- 0909-8836. ; 121:6, s. 525-31
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Tidskriftsartikel (refereegranskat)abstract
- The objective of the present study was to compare assessments of the mandibular bone as fracture risk indicators for 277 men and women. The mandibular trabecular bone was evaluated in periapical radiographs, using a visual index, as dense, mixed dense and sparse, or sparse. Bone texture was analysed using a computer-based method in which the number of transitions from trabeculae to intertrabecular spaces was calculated. The sum of the sizes and intensities of the spaces between the trabeculae was calculated using Jaw-X software. Women had a statistically significantly greater number of fractures and a higher frequency of sparse mandibular bone. The OR for having suffered a fracture with visually sparse trabecular bone was highest for the male group (OR = 5.55) and lowest for the female group (OR = 3.35). For bone texture as an indicator of previous fracture, the OR was significant for the female group (OR = 2.61) but not for the male group, whereas the Jaw-X calculations did not differentiate between fractured and non-fractured groups. In conclusion, all bone-quality assessments showed that women had a higher incidence of sparse trabecular bone than did men. Only the methods of visual assessment and trabecular texture were significantly correlated with previous bone fractures.
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| 2. |
- Jonasson, Grethe, 1945, et al.
(författare)
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Mandibular bone changes in 24years and skeletal fracture prediction.
- 2013
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Ingår i: Clinical Oral Investigations. - : Springer Science and Business Media LLC. - 1432-6981 .- 1436-3771. ; 17:2, s. 565-572
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The objectives of the investigation were to describe changes in mandibular bone structure with aging and to compare the usefulness of cortical and trabecular bone for fracture prediction. MATERIALS AND METHODS: From 1968 to 1993, 1,003 women were examined. With the help of panoramic radiographs, cortex thickness was measured and cortex was categorized as: normal, moderately, or severely eroded. The trabeculation was assessed as sparse, mixed, or dense. RESULTS: Visually, the mandibular compact and trabecular bone transformed gradually during the 24years. The compact bone became more porous, the intertrabecular spaces increased, and the radiographic image of the trabeculae seemed less mineralized. Cortex thickness increased up to the age of 50 and decreased significantly thereafter. At all examinations, the sparse trabeculation group had more fractures (71-78%) than the non-sparse group (27-31%), whereas the severely eroded compact group showed more fractures than the less eroded groups only in 1992/1993, 24years later. Sparse trabecular pattern was associated with future fractures both in perimenopausal and older women (relative risk (RR), 1.47-4.37) and cortical erosion in older women (RR, 1.35-1.55). RR for future fracture associated with a severely eroded cortex increased to 4.98 for cohort 1930 in 1992/1993. RR for future fracture associated with sparse trabeculation increased to 11.43 for cohort 1922 in 1992/1993. CONCLUSION: Dental radiographs contain enough information to identify women most at risk of future fracture. CLINICAL RELEVANCE: When observing sparse mandibular trabeculation, dentists can identify 40-69% of women at risk for future fractures, depending on participant age at examination.
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| 3. |
- Jonasson, Grethe, 1945, et al.
(författare)
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Mandibular cortical bone structure as risk indicator in fractured and non-fractured 80-year-old men and women
- 2021
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Ingår i: BMC Oral Health. - : Springer Science and Business Media LLC. - 1472-6831. ; 21
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Tidskriftsartikel (refereegranskat)abstract
- Objective: To investigate the association between mandibular cortex parameters and fracture in a group of 286 men and women, 79–80years of age. Study design: In a cross-sectional study, the mandibular cortex was evaluated with Klemetti’s index for cortical erosion. The cortical thickness was measured with a ruler adjusting for the magnification factor. The odds ratio (OR) for fracture when having a severely eroded cortex or a cortex thickness < 3mm was calculated. Results: A normal cortex was found in 65% of men, whereas only 7% had a severely eroded cortex. The OR forseverely eroded cortex as fracture risk predictor was significant (2.32; 95% CI 1.3–4.2), also when the female group was evaluated separately. A significant difference was found between the mean thickness for men (3.96mm) and women (2.92mm), respectively. The OR for cortical thickness< 3 mm was significant (2.00; 95% CI 1.1–3.6) in the total group, but not when men and women were evaluated separately. Conclusions: Among old women, the cortical parameters were significantly associated with prevalent fracture. In old men, other circumstances may be more important.
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