The Saudi Journal for Dental Research最新文献

Objective: The purpose of this study was to determine the incidence and severity of oral mucositis (OM) in Saudi children newly diagnosed with Acute lymphoblastic leukemia (ALL) following chemotherapy, and to evaluate the significance of independent risk factors (age, gender, parents’ educational level, family income, oral hygiene practices, dietary habits and different chemotherapy regimens) on the development of OM. Methods: Sixty Saudi children newly diagnosed with ALL of both genders, aged (6–14 years) were examined and their parents were interviewed and asked to fill a questionnaire before and within the third week of receiving chemotherapy. The World Health Organization’s (WHO) oral toxicity scale was used to record OM. Results: The prevalence of OM was 23.3% with a mean age of 8.36 (2.98). 92.9% High risk patients had OM and 7.1% with Low risk patients. The results showed a highly significant difference between oral hygiene practices before and within the third week of receiving chemotherapy in relation to OM. Also, there were strong associations between presence of OM, and frequency of oral hygiene practice in and dietary habits within the third week of receiving chemotherapy. Conclusion: There is a strong correlation between oral hygiene practices and the developmental severity of OM in ALL children before and during chemotherapy treatment. Oral mucositis severity associated with chemotherapy treatment has a significant effect on the dietary habits of ALL children and the use of different treatment regimens with ALL children is considered to be an important risk factor for the development of OM.

Aim: To evaluate the current knowledge about oral health and preventive dentistry among adults seeking dental care in Riyadh, Saudi Arabia. Materials and methods: A cross-sectional descriptive study was conducted in which 900 questionnaires were randomly distributed to adults seeking dental care in all health settings in Riyadh; 450 questionnaires were distributed in each of the governmental and the private sectors. The questionnaire included questions regarding socio-demographic factors (age, education, occupation, etc) and others concerning the patient’s knowledge of preventive dental measures; the oral hygiene procedures, fluoride and sealant applications and the healthy dietary habits. Statistical analysis was performed using SPSS and simple descriptive statistics as means and frequency distributions were calculated for the study variables. Comparisons were performed using Chi-square test. Results: Eighty-six percent of the study subjects knew that dental caries could be prevented. Almost 59% were aware of the relation between frequency of sugar intake and dental caries. The prevalence of patients who knew that fluoride prevents dental caries was 50.3%, however, only 34.2% reported previous applications of topical fluoride in dental clinics. About 16% of the participants had received fissure sealants although 42.4% knew about them. The study sample’s dietary knowledge had statistically significant relations with education and occupation (p < 0.0001). Correct knowledge of visiting the dental clinic was statistically significantly related to education (p < 0.0001). Conclusion: It can be concluded that the majority of adults in Riyadh have the correct preventive dental knowledge, which is mostly related to the individuals’ educational level and occupation.

Purpose: Ectopic tooth within the tooth bearing region is often noticed in clinical practice but ectopic eruption in non-dentate regions like maxillary sinus is rare. Rarer is the presence of multiple ectopic teeth involving both the maxillary incisors and canine and has not been reported yet. Method: A seventeen year old male presented with a complaints of dull pain on the right side of the face for past two years. Water’s view X-ray of PNS revealed dense non-specific opacification of the right maxillary sinus. Result: Antrostomy through Caldwell–Luc approach revealed three ectopic teeth in the right maxillary sinus. Later the teeth were identified to be central incisor, lateral incisor and canine. Conclusion: Rare finding of ectopic incisors in the maxillary sinus is reported and the need for interdisciplinary approach to patients is stressed upon.

Background/purpose

PMMA resin mostly used the fabrication of denture base by heat-curing technique. It has poor strength, including low impact strength and low fatigue resistance. In this work the combination of nitrile butadiene rubber (NBR) with two types of ceramic fillers (Al₂O₃ and YSZ, respectively) on the mechanical properties of denture base are investigated.

Materials and methods

The denture base composites were fabricated by incorporating PMMA powder, 0.5 wt% of benzoyl peroxide (BPO), fixed at 7.5 wt% NBR particles and ceramic fillers (fixed at 5 wt%) as powder components. In total, 180 specimens were prepared for all tests and divided into 6 groups for each test (N = 10) coded G1–G6. Group 1 as the control group (without fillers) was mixed between PMMA powder and BPO; whereas the other five groups (G2–G6) were reinforced with NBR particles and different concentrations of ceramic fillers. The morphology of the fracture surface of specimens was examined by Field Emission Scanning Electron Microscopy (FESEM).

Results

Statistical analysis, shows that the mean impact strength (IS) and fracture toughness (K_IC) of control dentures when compared to reinforced PMMA at 7.5% NBR and 2.5% Al₂O₃/2.5% YSZ improved significantly (5.27 ± 0.21–10.25 ± 0.41 kJ/m² and 1.60 ± 0.24–2.58 ± 0.30 MPa·m^1/2, respectively).

Conclusion

The reinforced PMMA denture bases are significantly different in IS and K_IC between study groups (P = 0.001). However, the Vickers hardness (VH) is statistically not significantly different (P > 0.05).

Aim: This study investigated the factors that influence career choice among second year dental, medical and nursing students at King Saud bin Abdulaziz University for Health Sciences. Methodology: One hundred and fifty questionnaires were distributed to 2nd year pre-professional medical, dental and nursing students (50 questionnaires per group). First part of questionnaire was regarding demographics and in the second part consisted of 23 factors that might influence the students’ career choices which were divided into six dimensions namely social status, economy, profession, vocation/service, interest in science/education, and personal background. Results: We received 119 completed questionnaires (medical = 40, dental = 40 and nursing = 39) with the response rate of 79.3%. We found that the social status of being a doctor or a dentist motivated medical and dental students compared to being a nurse for nursing students and the difference was significant among three groups (P value: 0.01). Furthermore, dental students when compared to both medical and nursing students were more likely to be motivated by factors related to profession that were job security, flexible timings and many others. On the other hand, with regard to factors relating to personal background, medical students showed lower motivation in comparison with dental and nursing students. Nevertheless the difference in attitude related to personal background was significantly different among three groups (P value <0.01). Conclusions: Through this study we concluded that factors related to professional security, personal background influenced the career choices of pre-professional medical, dental and nursing students. However we cannot generalize the finding as it was done in one hospital of Riyadh. Nevertheless, this study was able to provide valuable information on the reasons for choosing a professional career among Saudi Arabian students. Further multicenter studies are needed to build upon the findings of the current study.