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Stomatologija 2016; 18 (3): 86-91 645 KB

Evaluation of bone mineral density in postmenopausal women with alterations of the mandible cortical bone

Estera Miliuniene¹, Vidmantas Alekna², Vytaute Peciuliene¹, Marija Tamulaitiene²

Summary

Objective. Menopause affects the bone quality and quantity of jaw bone. The aim of this study was to evaluate the validity of mandibular cortical measurements in the diagnosis of low bone mineral density (BMD) in postmenopausal women.

Methods. A total of 113 postmenopausal women (mean age 63.15±6.05 years), living in Lithuania, were examined. Participants were categorized as either normal BMD, or low BMD according to the WHO classification in relation to their spine BMD determined by dual energy X-ray absorptiometry. None of the participants were known to have endocrine, metabolic or skeletal disorders. BMD was measured in the spine lumbar area L2-L4. The mandibles were examined on panoramic x-ray images. The following radiomorphometric indices were measured: the height of the mandibular inferior cortex below foramen mentalae (IC) and cortical thickness at the angle of the mandible (Panoramic Angular Index (PA)). Receiver operating characteristics (ROC) curve analysis was used to determine the validity of cortical measurements in the diagnosis of low BMD obtained and the area under the ROC curve (AUC) was calculated.

Results. Significant associations were found between IC and PA, and low BMD. The areas under the ROC (AUC) of PA was 0.753 (95% CI, 0.645-0.861) and of IC was 0.709 (95% CI, 0.601-0.816). High levels of intra- and interobserver agreement were demonstrated.

Conclusions. Postmenopausal women with spinal low BMD can be identified moderately accurately by mandibular cortical findings.

Key words: menopause, mandible, cortical bone, bone mineral density.

Received: 20 10 2015

Accepted for publishing: 26 09 2016

¹Institute of Odontology, Faculty of Medicine, Vilnius University, Lithuania

²Institute of Experimental and Clinical Medicine at Vilnius University, Faculty of Medicine, Vilnius University, Lithuania

Address correspondence to Estera Miliuniene, Institute of Odontology, Faculty of Medicine, Vilnius University, Zalgirio str.117, LT-08217 Vilnius, Lithuania.

E-mail address: estera.miliuniene@mf.vu.lt



	Baltic Dental and Maxillofacial Journal

September, 2016, Vol. 18, No. 3 CONTENTS SCIENTIFIC ARTICLES Stress experience and effect on self-perceived oral health status among high school students Kristina Arman, Adelė Petruninaitė, Rūta Grigalauskienė, Eglė Slabšinskienė 75-79 The golden proportion in facial soft-tissues of Vietnamese females Minh Son Nguyen, Mare Saag, Van Nho Le, Thuy Trang Nguyen, Bui Bao Tien Nguyen, Triin Jagomägi 80-85 Evaluation of bone mineral density in postmenopausal women with alterations of the mandible cortical bone Estera Miliuniene, Vidmantas Alekna, Vytaute Peciuliene, Marija Tamulaitiene 86-91 The appearance of root canal surfaces in teeth previously treated using resorcinol-formaldehyde resin: a preliminary SEM investigation Egle Nedzinskiene, Saulius Drukteinis, Vytaute Peciuliene, Rasmute Maneliene 92-97 Immunohistochemical analysis of nestin, CD34 and TGFβ3 in facial tissue of children with complete unilateral and bilateral cleft lip and palate Liene Smane-Filipova, Mara Pilmane, Ilze Akota 98-104 © 2016 Stomatologija		Stomatologija 2016; 18 (3): 86-91 645 KB Evaluation of bone mineral density in postmenopausal women with alterations of the mandible cortical bone Estera Miliuniene¹, Vidmantas Alekna², Vytaute Peciuliene¹, Marija Tamulaitiene² Summary Objective. Menopause affects the bone quality and quantity of jaw bone. The aim of this study was to evaluate the validity of mandibular cortical measurements in the diagnosis of low bone mineral density (BMD) in postmenopausal women. Methods. A total of 113 postmenopausal women (mean age 63.15±6.05 years), living in Lithuania, were examined. Participants were categorized as either normal BMD, or low BMD according to the WHO classification in relation to their spine BMD determined by dual energy X-ray absorptiometry. None of the participants were known to have endocrine, metabolic or skeletal disorders. BMD was measured in the spine lumbar area L2-L4. The mandibles were examined on panoramic x-ray images. The following radiomorphometric indices were measured: the height of the mandibular inferior cortex below foramen mentalae (IC) and cortical thickness at the angle of the mandible (Panoramic Angular Index (PA)). Receiver operating characteristics (ROC) curve analysis was used to determine the validity of cortical measurements in the diagnosis of low BMD obtained and the area under the ROC curve (AUC) was calculated. Results. Significant associations were found between IC and PA, and low BMD. The areas under the ROC (AUC) of PA was 0.753 (95% CI, 0.645-0.861) and of IC was 0.709 (95% CI, 0.601-0.816). High levels of intra- and interobserver agreement were demonstrated. Conclusions. Postmenopausal women with spinal low BMD can be identified moderately accurately by mandibular cortical findings. Key words: menopause, mandible, cortical bone, bone mineral density. Received: 20 10 2015 Accepted for publishing: 26 09 2016 ¹Institute of Odontology, Faculty of Medicine, Vilnius University, Lithuania ²Institute of Experimental and Clinical Medicine at Vilnius University, Faculty of Medicine, Vilnius University, Lithuania Address correspondence to Estera Miliuniene, Institute of Odontology, Faculty of Medicine, Vilnius University, Zalgirio str.117, LT-08217 Vilnius, Lithuania. E-mail address: estera.miliuniene@mf.vu.lt