Ideal Versus Late Secondary Alveolar Bone Graft Surgery: A Bone-Thickness Cone-Beam Computed Tomographic Assessment.

OBJECTIVE

To compare the bone morphology after secondary alveolar bone graft surgery (SABG) performed before and after permanent canine eruption.

DESIGN

Cross-sectional study.

SETTING

Hospital for Rehabilitation of Craniofacial Anomalies, University of São Paulo, Bauru, SP, Brazil.

PATIENTS

25 cone-beam computed tomography (CBCT) scans of complete unilateral cleft lip and palate (CLP) individuals who underwent SABG before or after eruption of the permanent canine taken 2 and 6 months (T1 and T2) after SAGB, resulting in 50 CBCT scans. Two groups were assessed, Ideal Group (IG; n = 10) and Late Group (LG; n = 15), according to the time of the SABG.

INTERVENTIONS

SABG buccal-palatal thicknesses were measured in 3 different root levels: cement-enamel junction (cervical slice), middle point of the root (intermediate slice), and apex of the central incisor (apical slice). Thickness measurements were assessed in the mesial, distal, and intermediate aspects of the alveolar bone graft. Clinical long-term follow-up was also done.

RESULTS

The IG showed significantly greater bone thickness, especially in the intermediate and apical slices, when compared to LG, in T1 and T2. Bone thickness was maintained over time. Clinically, all the IG individuals completed orthodontics, and no major complications were observed. In contrast, 27% of the LG individuals had failures, and rehabilitation was achieved through prosthesis.

CONCLUSION

Ideal SABG presents with better results compared with late ABG. When it is not possible to perform SABG at the ideal time, acceptable outcomes still can be expected for late bone grafting.