Résumé
There is still no consensus on the optimal age for alveolar grafting. In order to decide on the success of this graft, the best known radiographic assessments lacks precision. Kamperos recently proposed a 3D CBCT score that simultaneously assesses alveolar bone height and thickness, as well as the nasal floor level. The aim of this study was to apply this new score and compare it between an early secondary alveolar grafting « ESAG » (4-7 y) and a late secondary alveolar grafting « LSAG » (8-11 y) surgery group. A total of 32 cases of ESAG and 17 of LSAG were analysed. On 3D imaging, the median age of ESAGs was 10 years and 15 years for LSAGs. In the ESAGs, 78% of the permanents canines were not on the arch compared to 18% in the LSAGs. In both groups, the reconstruction of the nasal floor was very adequate but the height and thickness appeared less good in the ESAGs. The final score was higher in LSAG (Chi2, P < 0.005). The analysis of the alveolar bone with the Kamperos score is accurate and relevant but it should preferably be performed in the permanent dentition phase. This is because the area of rhizalysis of the primary teeth and the follicular sac of the erupting permanent teeth influence the presence of effective bone.