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A 40-year-old member asked:

what is the difference between a dexa bone density scan and x-ray?

3 doctor answers7 doctors weighed in
Dr. Robert Lang
Endocrinology 52 years experience
Dose and accuracy: The DEXA uses a very small dose of x-ray compared to a regular x-ray and it is designed to measure density not produce a high quality picture. A regular x-ray is designed to produce a high quality picture and is a poor measure of density.
Dr. Georgianne Snowden
Interventional Radiology 34 years experience
DEXA uses CT: A DEXA scan uses cat scan and measures absorption of the x-ray to come up with a bone density measurement that can then be compared to age-matched normals. X-ray is a simple radiograph that makes an image, but is not able to quantitate bone density.
Dr. Michael Gabor
Diagnostic Radiology 33 years experience
DEXA is different from CT bone densitometry. DEXA does not use CT. DEXA computes bone density by measuring the differences in attenuation between 2 X-ray beams of differing energy(Dual Energy, the DE in DEXA) after they pass through the body, usually the hip and spine for standard exam.
Jul 11, 2014
Dr. Michael Gabor
Diagnostic Radiology 33 years experience
Nothing: The DEXA scan actually uses two low dose X-rays of different energy. By measuring the differences in how they are absorbed, bone density can be calculated.

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Do changes occur in a mother's bones while pregnant or breastfeeding?

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Yes: Both pregnancy and breastfeeding can cause bone loss in mother. You should get adequate calcium through your diet and if needed supplementation. You should do daily weight bearing exercises as well.
A 21-year-old member asked:

Can a chest X-ray be substituted for a tst?

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Dr. Richard Orr
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What is TST?: If you mean tuberculin skin test - no. A chest X-ray may diagnose active tb.
A member asked:

Can I get braces with bone loss.Think my overbite could be causing front teeth to be loose?

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Dr. David Schneider
Dentistry 38 years experience
Yes: However, it is imperative that the periodontal disease (bone loss) be treated so that you are in good periodontal health and in a maintainable level of periodontal health. See a periodontist before beginning the orthodontic therapy. I can provide you with a local good periodontist via e-mail (dhschneid@gmail.Com).
Addison, TX
A 23-year-old female asked:

Is it ok to make a 2 month old baby sit upright. Won't it hurt her back bone?

1 doctor answer1 doctor weighed in
Dr. Rodrigo Argenal
Pediatrics 22 years experience
Not natural: Sitting is not natural for a 2 mo old. Laying on a surface semi-upright is. If you sit him supporting him (like on your lap while holding him), then it is ok. I would not advise sitting him by himself on a high chair for example.
A 32-year-old member asked:

Will partial dentures decrease the chances of bone loss in the jaw?

6 doctor answers16 doctors weighed in
Dr. Earl Sandroff
Dentistry 43 years experience
Better to have em: What makes bone disappear in the jaws is lack of teeth. Keeping as amany as possible and helping the rest of your mouth may help e bone stay a lot longer. Sometimes we will even file teeth level with the bone (with or w/o root canal) and then give you an over denture just to try to keep yu bone level up. The partials will also make it easier to chew food than having an empty space.

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