Yazd Journal of Dental Research

Introduction: This study was conducted to determine the prevalence and variations of pneumatized articular eminence in patients referring to Yazd Dental school. Methods: A total of 3098 panoramic radiographs were retrospectively investigated for the prevalence and radiographic features of PAT. Chi-square and Fisher exact tests were utilized via applying SPSS software to analyze the research data . Results: Generally, PAT was found in 64 (2/1 %) patients. In other words, bilateral PAT was found within 24 patient (37 %), whereas unilateral PAT was found in 40 patient (63%) and thus, there was a statistically significant difference between bilateral and unilateral PAT (p=0.049). PAT occurred in 41 cases out of 1735 females (2/4%) and 23 cases out of 1363 males (1/7%), though no statistically significant differences were seen in regard with participants’ gender(Exact probability one side=0.117). Moreover, PAT was observed more in the age group above 50 years old (2/4 %) and less in ages between 40-49 years old. The ratio of unilocular pattern to multilocular pattern was 1/25. Conclusion: The presence of PAT can be a contraindication for performing eminoplasty and eminectomy in order to treat recurrent chronic mandibular dislocation during the operation. Therefore, care must be taken while using burs in order to avoid such unwanted accidents as sudden penetration.

Introduction: Odontogenic myxomas are benign but locally aggressive neoplasms arising from odontogenic ectomessenchyme found almost exclusively in the jaws and arise only occasionally in other bones.

Case report:.By a brief review of clinical and radiological features, and also diagnostic and operative dilemmas in assessment a rare case of adontogenic myxoma was presented, which was occurred in the mandible of a 26-year-old femal palient.

Conclusion: Careful evaluation of clinical features and radiographic imaging with detailed assessment of histpathology leads to correct diagnosis

Introduction: To investigate the relationship between radiolucent periapical lesions and bone mineral density in post-menopausal women that was referred to the Yazd Khatam-Al-Anbiya clinic in 2014.

Methods:In this Cross-sectional study was conducted. Fifty postmenopausal women with a mean age of 57.9±5.00 years and the average age of menopause is 49.6±2.49 years, the average  of bone density of
-2.4±0.8 were used for this study. Bone mineral density was measured using dual-energy X-ray absorptiometry in three groups: healthy bone, osteopenic and osteoporotic. Periapicalradiolucencies were diagnosed on the basis of examination of digital panoramic radiographs and data collected by the software SPSS 17 and statistical test ANOVA and chi-squared tests, and t-test, and Fisher Exact test analysis.

Results:The results showed a not significant relationship between bone mineral density and the ratio of the radiolucent periapical lesions to the total number of teeth (P-value=0.131). Also the relationship between the number of periapical radiolucent lesions with menopause age (P-value=0.428) and duration of menopause
(P-value= 0.362) and bone mineral density with menopause age (P-value=0.916) was not significant. But the relationship between bone mineral density and duration of menopause was significant (P-value = 0.004).

Conclusions:The result of this study, cannot use the number of apical radiolucent lesions in panoramic radiography, as bone density index.