Study of the Prevalence of Dental Anomalies among Orthodontic Patients

Objectives: , To determine the Prevalence of dental anomalies among Orthodontic patients at the State University of New York at Buffalo.

 Methods: , This study was based on full initial records of pretreatment intraoral photographs, digital study models, lateral cephalometric, and panoramic radiographs. The data for this study were obtained from dolphin software in the School of Dental Medicine.  There were 658 charts examined from which 496 met the acceptance criteria for inclusion in the study. The sample consisted of (310 females   and 186 males) who received orthodontic treatment in the graduate orthodontic clinic between 2007- 2010. The charts were examined for the following anomalies: agenesis, supernumerary and impaction or delayed tooth eruption. Subjects were categorized according to their age, gender, ethnicity (African American, Hispanic, Oriental, Middle Eastern, Caucasian and Indian).The percentages of these anomalies were assessed in the whole group according to ANB° classification, Angle’s Dental Classification, gender, races, by location, tooth class and region in the dental arches.

 Results: , assessment of these types of dental anomalies was made for each subject. Sixty four subjects (12.9%) had at least one occurrence of Delayed Eruption and Impaction (DEI), followed by forty seven subjects (9.5%) had at least one occurrence of agenesis  and seven (1.4%) had a Supernumerary condition.  Approximately 80% of the subjects had no dental anomalies.  The percentage incidence of these entities was similar in both the females and the males. The presence of more than one anomaly was 61 subjects (12. 3% in females and 11.6% in the males). Twelve subjects (2.4%) had both agenesis and (DEI).

Conclusion: , The prevalence of the permanent tooth anomalies in the subjects studied was (20.4%). The percentage occurrence of delayed eruption and impaction (12.9%) was the highest followed by dental agenesis (9.5%) and supernumerary teeth (1.4%) among the Orthodontic patients at SUNY at Buffalo.