Bone Mineral Density Of Jaw Research Articles

Evaluation and Correlation of Vitamin D Levels and Jaw Bone Mineral Density in Premenopausal and Postmenopausal Female Patients Undergoing Implant Therapy: Protocol for a Cross-sectional Study

Introduction: Vitamin D deficiency is one of the most common nutritional deficiencies worldwide. The amount and quality of bone at the implant installation site have an impact on the implant’s prognosis however, the effects of menopause on jaw bone remain unknown. Few studies have looked at the prevalence of vitamin D deficiency in India’s general population, but none have looked at the link between vitamin D deficiency (osteoporosis) and postmenopausal women’s jaw Bone Mineral Density (BMD). This is the first study of its sort in India to look at postmenopausal women’s vitamin D levels and jaw BMD. Aim: To evaluate and correlate vitamin D levels and jaw BMD in pre and postmenopausal females undergoing implant therapy. Materials and Methods: This cross-sectional study will include 50 partially or completely premenopausal (n=25) and postmenopausal females (n=25) having edentulous anterior and posterior maxillary and mandibular jaws. Females will be tested to evaluate their vitamin D levels and jaw BMD with Cone Beam Computed Tomography (CBCT) and results will be recorded in Hounsfield Units (HU) using Planmeca romexis viewer software. Chi-square test and Students t-test will be used.

A systematic review on the correlation between skeletal and jawbone mineral density in osteoporotic subjects.

The aim of this systematic review was to assess whether the systemic skeletal reduction of bone mineral density (BMD) that characterizes osteoporotic subjects is also associated with a reduction of BMD in the jawbones. Two reviewers searched independently and in duplicate three databases up to May 2014 and assessed the risk of bias using a tailored version of the Newcastle-Ottawa scale (NOS). Only papers reporting either Pearson's correlation coefficient or Spearman's rank correlation coefficient between skeletal and jawbone mineral density in more than five osteoporotic subjects were selected. From 1763 citations, 64 full-text papers were screened and five papers that met the inclusion criteria were included in the final analysis. None of the included studies complied with all NOS criteria, and as only two studies were eligible for meta-analysis, this was not performed. Only limited conclusions can be drawn from this systematic review, due to the small number of studies included, their heterogeneity, and their high risk of bias. Future studies that take into consideration both upper and lower jaws, that use the same technique to measure skeletal and jaw BMD (ideally dual-energy X-ray absorptiometry, DXA), and that account for confounding variables (such as medications/diseases affecting bone metabolism and demographics) are needed to provide more robust conclusions.

Effect of Zinc-Containing .BETA.-Tricalcium Phosphate Nano Particles Injection on Jawbone Mineral Density and Mechanical Strength of Osteoporosis Model Rats

Zinc-containing β-tricalcium phosphate (ZnTCP) nano particles were injected into zinc-deficient rats to promote osteogenesis. Sprague-Dawley (SD) rats (4 weeks old, average weight of 70 g) were divided into four groups: Normal rats (not ovariectomized (OVX)), Control rats (OVX), and OVX rats injected with a suspension of ZnTCP nano particles or ZnSO(4). The ZnTCP contained 6.17% zinc. The suspensions (0.6 mg as a zinc volume/0.2 ml) were injected around the jaw bone once a week for 12 weeks. Local effects on the bone mineral content (BMC) of jawbone, and systemic effects on body weight, the BMC of both femurs determined by X-ray computed tomography, and bone mechanical strength (BMS) measured by the three-point bending method, were examined. The BMC of jaw bone was significantly higher in the ZnTCP-treated group than un-treated or ZnSO(4)-treated group. Body weight, the BMC of femurs, and BMS were also significantly higher in the ZnTCP treated-group. The zinc-containing β-tricalcium phosphate nano particles were effective at preventing bone loss induced by ovariectomy in rats and have potential uses for treating periodontitis.