Cephalometric analysis of patients with beta thalassemia receiving fetal hemoglobin induction therapy

Objective

We aimed to determine the effects of fetal hemoglobin induction therapy in restricting or even reversing the cephalometric changes associated with beta thalassemia.

Materials and methods

In this comparative observational study, 90 participants were equally divided into three groups: a control group; patients with thalassemia major receiving blood transfusion (BT group); and patients receiving induction therapy (i.e., hydroxyl urea (5-10 mg/kg/day) or as much as 20 mg/kg/day) and thalidomide (2-10 mg/kg/day) along with blood transfusion (IT group). All patients underwent history taking and examination, photographic assessment, and radiographic evaluation with a lateral cephalogram. One-way ANOVA followed by post-hoc Tukey test was used to determine differences among groups.

Results

The IT group differed significantly from the BT group in all photographic and skull table parameters, and most cephalometric parameters, such as facial angle (p ≤ 0.001), middle and lower facial heights (p ≤ 0.001), and inter-incisal angle (p = 0.036); the mean values in the IT group were similar to those in the control group. In-addition, dental and soft tissue measurements significantly differed among groups. For most parameters, the mean difference indicated higher values in the BT group.

Conclusion

Induction therapy appeared to improve the facial angles, heights, and inter-incisal angles, whereas a class II skeletal pattern was observed in the transfusion only group. These findings suggest that fetal hemoglobin induction therapy might have restricted some of the cephalometric changes in patients with beta thalassemia.

Dental students' attitudes and perceptions about intraprofessional collaboration/education

Objectives

To investigate dental students' attitudes and perceptions about intraprofessional collaboration/education (IPC/IPE) and shared learning, and to explore the impact of IPC/IPE on the personal and professional development of participating students.

Methods

A custom-designed questionnaire was used in this cross-sectional study. The questionnaire comprised 17 questions targeting to capture the student's perceptions about IPC/IPE using three factors: (1) dental students' preference/opinion about the IPC/IPE; (2) dental students' experience about the impact of IPC/IPE on learning outcomes and professional development; and (3) students' feedback about the significance of IPC/IPE in clinical/clinical simulation labs and workplace setting. The students rated each of the 17 statements on the 5-point Likert scale (range: 1 = strongly disagree to 5 = strongly agree).

Results

A total of 259 responses were analysed (response rate = 65%). All students were aware of IPC/IPE in the field of dentistry (mean score = 4.22). The students preferred collaborative/shared learning with their own classmates. There was a consensus among students about the positive impact of IPC/IPE on enhanced learning, enhancement of communication skills, and enrichment of professional relationships with supporting staff as well as with the patients. There was also improved analytical and psychomotor skills, understanding of complex problems in the clinic, and understanding of strengths and limitations leading to self-improvement and increased efficiency and productivity.

Conclusion

IPC/IPE had a compelling, powerful, and positive impact according to the experience of the participating dental students. It is recommended that a standardized curriculum be designed and guidelines set for IPC/IPE at dental institutions for effective interactions among students of all stages.

Rubric system for evaluation of crown preparation performed by dental students

OBJECTIVE

This study aimed to investigate the use of an analytic rubric system for the evaluation of all-ceramic crown preparation on the right maxillary central incisor performed by the dental students.

MATERIALS AND METHODS

Seventy-two-third-year students and 8 faculty members from prosthodontics participated in this double-blind study. The students prepared an ivorine tooth # 11 for all-ceramic crown. The students were given clear instructions regarding the all-ceramic crown preparation and informed about the criteria for the assessment of the preparation. An analytic rubric based on 10-point scale for assessment of various preparation parameters was used by the 8 examiners. Descriptive statistics, ANOVA and post hoc Tukey tests were used for statistical analysis.

RESULTS

One-way analysis of variance indicated significance amongst the examiners for all the parameters except for time management. The overall mean scoring by examiners was 7.60 ± 1.18, with highest and lowest mean scores for Examiner 1 (8.02 ± 1.06) and Examiner 4 (6.82 ± 1.50), respectively. The highest number of interexaminer variation (difference) in scoring was found for two plane reduction, and the least difference amongst the examiners was observed for finishing of margins and walls of the preparation. Examiner 4 had the highest number of significant difference with the rest of the examiners. The students scored least marks in axial reduction (56.33%) and preservation of adjacent teeth (66.9%).

CONCLUSIONS

Criteria-based assessment using analytic rubric for crown preparations in pre-clinical fixed prosthodontics is an effective tool for finding the errors/weak areas of dental students.

Relationship of Body Mass Index with Diet, Physical Activities, and Lifestyles of Dental Students

INTRODUCTION

The objective of the study was to investigate the prevalence of overweight issues and obesity by recording the body mass index (BMI) and explore the dietary habits, physical activities (PAs), and lifestyles of male students at the College of Dentistry, King Saud University.

MATERIALS AND METHODS

A custom-designed self-administrative form and questionnaire were used in this study for data collection. The first part of the form was used to record the participants' height and weight for the BMI. The participants were grouped as underweight (BMI < 18.5), normal weight (BMI = 18.5-24.9), overweight (BMI = 25-29.9), and obese (BMI > 30.0). The second part comprised questions related to the dietary habits, PAs, and lifestyles of the male dental students. Chi-squared test was used to generate the significance of each question at significance <0.05.

RESULTS

A total of 211 male students (mean age 22.31 ± 2.10 years) participated in the study (response rate 78.1%). The findings revealed that 29 and 28% of the dental students were overweight and obese respectively. A statistically significant difference (p < 0.05) between the groups was found for the questions asked about time spent exercising per day (p = 0.003), time spent sporting per week (p = 0.003), and time spent watching television and internet surfing per day (p = 0.012).

CONCLUSION

The prevalence of overweight issues and obesity is high among the dental students compared with the general population of Saudi Arabia, and there is a need for intervention programs to combat obesity among the dental students. The awareness about PA, healthy diet/lifestyle, consequences of overweight and obesity on their health and profession must be increased among the dental students to avoid future complications.

CLINICAL SIGNIFICANCE

The impact of obesity on individuals' oral health and its influence on dental treatment protocols and postoperative procedures has been well documented. Dental students are more prone to obesity due to their lifestyle with less PA and disordered eating habits and, thereby, are prone to obesity-related health hazards.

Comparing government (school) vs. private (non-school) dental laboratories in marginal adaptation of single porcelain-fused-to-metal crowns

AIM

The purpose of this study was to compare school and non-school dental laboratories in marginal adaptation of single Porcelain-Fused-to-Metal (PFM) crowns.

METHOD

Six dental laboratories (three school- and three non-school laboratories) participated in this study. Each dental laboratory was requested to fabricate PFM crowns for three different ivorine teeth on different typodont jaw models (n=18). The crowns received from the laboratories and fitted in their abutments using fit-checker under uniform pressure. We examined 162 sites viewed under a scanning electron microscope to measure the vertical and horizontal marginal discrepancy.

RESULTS

The mean vertical marginal discrepancy for school dental laboratories was 208.9 µm, while for non-school dental laboratories was 182.8 µm. For the horizontal marginal discrepancy, the median values were 48.5 µm for school dental laboratories and 50 µm for non-school dental laboratories.

CONCLUSIONS

There was no statistically significant difference in the mean vertical and median horizontal values between school and non-school dental laboratories. However, a significant difference was observed within the non-school laboratories.