دراسة تاثير فقد الرباعيات الولادي في حجوم الاسنان الامامية في مدينة دمشق (دراسة مقارنة للامثلة الجبسية)

Background& Objective: The purpose of this study is to compare the anterior tooth size width in patients with congenitally missing maxillary lateral incisors with the normal width size of the Syrian. Materials & Methods: The study sample consisted of thirty two pairs of orthodontic models with unilateral (13 patients; 8 females, 5 males) and bilateral (19 patients; 14 females, 5 males) absence of maxillary lateral incisors. The mean ages of the selected cases were 18.3 and 18.5 years, respectively. Results: Descriptive statistics were used for the data analysis. The result showed the mean of the Bolton Index in cases with unilateral absence was closer to the Bolton mean for the normal Bolton value than in cases with bilateral absence. In the unilateral absence cases the width of the existing lateral incisor (5.9 mm) was an average of 0.8 mm less compared to the normal mean (6.7 mm), In the bilateral absence cases the maxillary central incisors were larger than the normal mean of 0.7mm and the maxillary canine were larger than the normal mean of (0.3-0.4) mm. Discussion: Patients with bilateral absence lateral incisors were also prone to other absence teeth and other anomalies. Conclusion: The conclusions of the present study will be greatly helpful for both the orthodontist, whether to open or close the space, and the prosthodontist to restore the missing teeth of patients having missing maxillary lateral incisors in Syria.