Farkli konjenital diş eksikliği paternine sahip olan hastalarda diş ve ark boyutlarinin retrospektif olarak incelenmesi

Aim: This study aimed to evaluate tooth and arch sizes of patients with different patterns of congenital tooth agenesis and determine the effect of tooth agenesis severity on tooth sizes and arch sizes. Material and method: Study casts of 132 patients who have been diagnosed on panoramic radiographs with congenitally missing teeth were collected from the Yeditepe University Faculty of Dentistry Department of Orthodontics' archive. The study group was divided into 2 subgroups according to severity of the hypodontia as mild (2 or less tooth agenesis), moderate (more than 2 teeth agenesis). Control group included 90 patients consist of equally number of patients as Class I, Class II and Class III skeletal relationships. The dental casts were scanned by using 3 Shape E Scanner. The mesiodistal (MD), labiolingual (LL) and occlusogingival (OG) measurements of the tooth were performed digitally. Arch dimensions were measured including intercanine and intermolar widths. The study groups and control group were compared. Results: MD width of all the teeth in the mild and moderate agenesis group was statistically significantly smaller than that of control group except for first molars and mandibular left central incisor in the mild agenesis group and except for the mandibular incisors for the moderate agenesis group. LL widths of all the teeth in the mild and moderate agenesis group were statistically significantly smaller than the control group (p<0.05) except for mandibular premolars and first molars. In general, OG measurements were smaller in agenesis groups (p<0.05). MD width of maxillary central incisors, first and second premolars and molars, and mandibular first premolars, and LL width of maxillary premolars of the moderate agenesis group was statistically significantly smaller than that of mild agenesis group (p<0.05) whereas there was no difference in OG dimensions between groups (p>0.05). Maxillary and mandibular intercanine widths were smaller in agenesis groups compared to the control (p<0.05) with no difference between study groups. Conclusion: Individuals with tooth agenesis have smaller tooth dimesions compared to individuals without tooth agenesis. The tooth size reduction increases as the severity of tooth agenesis increases particularly for mesiodistal and labiolingual dimensions of maxillary premolars. Key words: Hypodontia, Severity, Tooth Sizes, Arch Dimension