ABSTRACT
The oral health of pregnant mothers is one of the important factors affecting their health and their fetus health. Due to the poor oral hygiene of pregnant women and the requirement of appropriate solutions for this issue, gathering sufficient information on the oral health of the target population is essential. Therefore, this study was conducted to evaluate the oral health status of pregnant mothers referring to the educational centers Al-Zahra and Tabriz Dental School. Method and material: This descriptive cross-sectional study was performed on 60 pregnant mothers during the first half of 2019. They had referred to Al-Zahra Medical Training Center and Tabriz Dental School. For each case, a checklist includes demographic information and oral examination. Oral examinations include a Simplified Oral Health Index (OHI-S), Gingival Index (GI), and Plaque Index (PI). Finally, linear and logistic regression models were used to evaluate the relationship between studied variables. Results: 60 pregnant mothers were studied, 25% of them did not visit a dentist and 10% did not brush their teeth. OHI-S (0-3.33) was 1.08, PI (0-3) was 1, and GI was 0.90 ± 1.98. Also, 80% of the studied population was diagnosed with gingivitis. A significant relationship was observed between PI and the location of residency of pregnant mothers. 88.3% of pregnant mothers brushed their teeth, 26.7% of them used salt water, 18.3% used floss, and 5% of them used mouthwash. There was a significant relationship between education and oral hygiene routine. Also, pregnant mothers who used saltwater had a better GI. Conclusion: The result of our study indicated poor oral and dental hygiene of pregnant mothers and this is more evident among mothers who had lower socioeconomic status and lower level of education.

ABSTRACT
The aim of this study was to compare the push-out bond strength (PBS) and bone failure mode of Ortho mineral trioxide aggregate (MTA) and ProRoot MTA in root dentin. Forty extracted single-rooted human canine teeth were selected in this experimental study and the canal space of each dentin slice was enlarged with Gates Glidden burs to achieve a diameter of 1.3 mm. Midroot dentine was horizontally sectioned into 2-mm-thick slices. The samples were randomly divided into two groups (n=20) with a thin layer placement of Ortho MTA and ProRoot MTA, and then incubated at 37°C, 100% humidity for 24 hours (h). PBS (Mpa) and the bond failure mode were evaluated after 10 minutes (min) and 4 h using a universal testing machine and a stereomicroscope (×10), respectively. Data were analyzed using the Kruskal-Wallis test and K2 test. The mean PBS values of Ortho MTA were less than ProRoot MTA. The main failure mode after 10 min was cohesive type for both materials, while the dominant failure mode after 4 h was adhesive type in Ortho MTA and cohesive type in ProRoot MTA. Failure bond mode was irrelevant to the kind of tested materials and time assessments.

ABSTRACT
Case Report: Two female patients aged 8 and 9 years old with amelogenesis imperfecta (AI) reported unsatisfactory aesthetics, difficulty in mastication, and dental hypersensitivity. The clinical examination observed mixed dentition with antero-posterior malocclusion and anterior open-bite. A hypocalcified form of AI was diagnose. A multidisciplinary management plan was performed and divided into preventive, restorative, and prosthetic and interceptive stages. Initially, preventive treatment was implemented, with fluoride varnish applications, in order to reduce the dental sensitivity. In the second stage, in the posterior teeth, stainless steel crowns were performed with minimally invasive dental preparation. Direct composite resin restorations were used to improve the appearance of anterior teeth. Finally, the follow-up was programmed to control restoration’s integrity, oral hygiene. Conclusion: Successful reduction of the dental hypersensitivity and improvement of the aesthetic and functional aspects as well as quality of life were observed.

ABSTRACT
The eruption’s disorder of the maxillary incisors will be introduced through two cases of simple and compound odontomas. The clinical and radiological characteristics will be presented as well as the treatment and the evolution of permanent incisors. Patients have consulted the pediatric odontology department at the universal hospital la Rabta for the persistence of temporary teeth or the delayed eruption of permanent incisors. The cases described were diagnosed provisionally as odontoma on the basis of clinical and radiographic findings. Orthodontic and prosthetic approaches were used to restore function and esthetic. Early diagnosis of odontoma helps to ensure better prognosis, adopt less complex and traumatic treatment. Pediatric dentist must be aware to signs of changes from normality.