Assessment of cementoenamel junction-alveolar bone crest distance in interproximal areas of intact primary molars in healthy 7-9 year old boys in Hamadan

Statement of the problem: Recent studies have indicated that juvenile periodontitis in the permanent dentition of adolescents often is preceded by bone loss .The previous studies revealed the importance of early recognition and treatment of these patients to prevent the transition of the Early Onset Periodontitis(EOP) from the primary dentition to the permanent dentition. Purpose: The purpose of the present study was to determine the prevalence of marginal bone loss and also to investigate the base line values of the alveolar bone height in primary molars using direct measurements in standardized bitewing (B. W) radiographs in healthy 7-9 year old boys living in Hamadan, Iran. Method and Materials: Four hundreds healthy 7-9 year old junior school boys with no clinical evidence of dental caries, diastema and fillings in intermolar areas (D, E) were selected. Then bitewing radiographs were taken and examined. Results: According to the alveolar bone crest level, the mean of cementoenemal junction- alveolar bone crest distance for all primary teeth was 0.82 mm. In 89 surfaces (3.5%) of the total examined surfaces the distances were greater than 2mm indicating the prevalence of alveolar bone loss. Conclusion: This study provides useful base line data on alveolar bone height and shape of periodontium in clinical assessment regarding radiographical examination .Patients at risk should be identified and cured carefully. The most important step is to establish proper diagnostic measurements to prevent the chronicity and continuous progress of periodontal disease.