Raed H. Alrbata

To evaluate the mean overbite depth indicator (ODI) and anteroposterior dysplasia index (APDI) values in a sample of Arab Jordanian individuals and compare these findings to the original reference norms. A total of 240 subjects (mean age: 10.54 ± 2.3 years), comprising 123 females and 117 males, were selected based on the presence of an angle class I molar relationship and average vertical and sagittal skeletal and dental patterns. Participants were evenly distributed into four age-based cohorts: group I (7-8 years), group II (9-10 years), group III (11-12 years), and group IV (13-14 years). The mean values of the ODI and APDI were calculated for each age and gender subgroup. These values were statistically analyzed and compared with the original reference norms using SPSS software. A significance threshold of p < 0.05 was applied. Across the total sample, the mean ODI value was significantly lower (72.10° ± 3.34°), while the mean APDI value was significantly higher (82.70° ± 3.03°) compared to the original reference norms. No statistically significant differences in ODI or APDI values were observed among the four age subgroups. Gender-based analysis revealed no significant differences in APDI values between males and females. However, females exhibited significantly higher ODI values compared to males. The derived mean values for the ODI and APDI serve as clinically relevant benchmarks for orthodontic diagnosis and treatment planning in Arab populations and contribute to the refinement of global cephalometric standards through population-specific insights. This study shows that Arab Jordanian children have different average ODI and APDI values compared to the original standards. Knowing these differences helps orthodontists make better treatment decisions that match the needs of this population. How to cite this article: Alrbata RH, Rahamneh AS. Evaluation of the Overbite Depth Indicator and Anteroposterior Dysplasia Index in a Sample of the Arab Population. J Contemp Dent Pract 2026;27(1):51-54.

To evaluate the association between nonsyndromic cleft lip with or without cleft palate (NSCL±P) anomaly and the affected child's gender and maternal age. Records of 141 newborns received at the orthodontic craniofacial clinic of the Jordanian Royal Rehabilitation Center between 2017 and 2019 were retrospectively analyzed. Two variables were paid attention to: child's gender and maternal age. Five cleft types were considered: unilateral CLP (right; URCLP and left; ULCLP), bilateral CLP (BCLP), isolated cleft palate (CP) and isolated cleft lip (CL). Maternal age was classified into four subgroups: “26–30” years, “31–35” years, “36–40” years, and “above 40” years. Chi-square test and multinomial logistic regression analysis were used to analyze the resultant data. A significant occurrence of the NSCL±P in females was found compared with males. The different cleft types were found to be significantly associated with the different maternal age groups investigated. The ULCLP was the most prevalent cleft type for affected children among all maternal age groups except the “31–35” group, at which the BCLP exceeded. The children's gender and the maternal age have a significant impact on defining the developing oral cleft types.

Aim. To find thresholds at which laypersons and dental professionals perceive abnormalities in two facial frontal esthetics variables: facial symmetry and vertical harmony. Materials and Methods. A baseline frontal image of a young male face with optimum facial proportions was generated from a real image using a photo editing software. Different facial asymmetry images were then generated from this image by manipulating the chin point position at 2 mm increment to the left side. Vertical harmony was perceived through manipulating lower anterior facial height (LAFH) at a ratio of 2% of increased and decreased heights. A total of 120 raters divided equally into four groups of laypersons, general dental practitioners (GDPs), orthodontists, and oral and maxillofacial surgeons (OMFSs) rated these images using an analog scale of 100 mm long. Using ANOVA and Tukey post hoc tests at , the image that showed the first statistical difference compared to the baseline was considered as a threshold of abnormality. Results. The image of 4 mm asymmetry was defined by the laypersons and GDPs as the threshold of abnormality, while the orthodontists and OMFSs realized that at 2 mm. Laypersons and GDPs defined a threshold of 46% as an abnormal decrease in the LAFH and the other 2 groups at 48%. All dental professionals groups rated the image of 54% as an abnormal increase in the LAFH while laypersons perceived that at 56%. Conclusion. These thresholds regarding frontal esthetics may contribute to the process of establishing proper orthodontic treatment planning that suits the highest facial esthetic standards.

Aim. To find thresholds at which laypersons and dental professionals from Jordanian population perceive abnormalities in sagittal positioning of upper and lower jaws as a major determinant to facial profile esthetics. Materials and Methods. Using photo editing software, a baseline profile image of a young male was manipulated on a 2 mm incremental basis to move each of the upper and lower jaws backward and forward relative to true vertical line (TVL) at which four variables of maxillary and mandibular retrusion and protrusion were researched. A total of 120 participants divided equally into four groups of laypersons, general dental practitioners (GDPs), orthodontists, and oral and maxillofacial surgeons (OMFSs) rated the images using an analog scale of 100 mm long. The image that showed the first statistical difference compared to the baseline was considered as a threshold of abnormality. Results. Laypersons, GDPs, and OMFSs perceived the abnormality in the maxillary retrusion at −5 mm to TVL, while orthodontists defined that at −3 mm. All dental professionals perceived the abnormality in the maxillary protrusion at +1 mm to TVL while the layperson group at +3 mm. A threshold of −7 mm mandibular retrusion to TVL was abnormally perceived by all groups. All dental professionals realized the abnormality in the mandibular protrusion at 0 mm to TVL while the laypersons at +2 mm. Conclusion. These thresholds regarding profile esthetics may contribute to the process of establishing proper orthodontic treatment planning that suits the highest facial esthetic standards.

Objective: : To find an optimal force that can be loaded onto an orthodontic microimplant to fulfill the biomechanical demands of orthodontic treatment without diminishing the stability of the microimplant. Materials and Methods: : Using the finite element analysis method, 3-D computer-aided design models of a microimplant and four cylindrical bone pieces (incorporating cortical bone thicknesses of 0.5, 1.2, 2.0, and 3.0 mm) into which the microimplant was inserted were used. Various force magnitudes of 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, and 4.0 N were then horizontally and separately applied to the microimplant head as inserted into the different bone assemblies. For each bone/force assembly tested, peak stresses developed at areas of intimate contact with the microimplant along the force direction were then calculated using regression analysis and compared with a threshold value at which pathologic bone resorption might develop. Results: : The resulting peak stresses showed that bone pieces with thicker cortical bone tolerated higher force magnitudes better than did thinner ones. For cortical bone thicknesses of 0.5, 1.2, 2.0, and 3.0 mm, the maximum force magnitudes that could be applied safely were 3.75, 4.1, 4.3, and 4.45 N, respectively. Conclusions: : For the purpose of diminishing orthodontic microimplant failure, an optimal force that can be safely loaded onto a microimplant should not exceed a value of around 3.75–4.5 N.