12 research outputs found
The Role of “Functional Orthodontic Stress” on Implant in Residual Alveolar Cleft
Background: The most widely accepted protocol for alveolar cleft reconstruction
is repair during the mixed dentition stage (age, 9 to 11 years), before
eruption of the canine teeth. Alveolar bone grafting should not be considered
as an isolated therapy but always as an integrated part of comprehensive orthodontic
treatment.
Methods: The authors evaluate the results of transitional secondary osteoplasty,
comparing the use of autogenous cancellous bone versus heterogenetic implants,
in patients with unilateral complete clefts who did or did not undergo
orthodontic treatment. From 1990 to 1994, 48 patients aged between 9 and 11
years with unilateral alveolar cleft underwent alveolar grafting by transitional
secondary osteoplasty. In 30 patients (group A), autogenous cancellous bone
was used, and in 18 patients (group B), a heterogenetic implant consisting of
demineralized bone powder containing bone morphogenetic protein and hydroxylapatite
was used.
Results: Twenty-two patients in group A and 12 patients in group B underwent
orthodontic treatment. After 10 to 12 years of follow-up, the clinical and radiographic
examinations revealed that the best alveolar bone repair results were
obtained using autologous bone graft in association with orthodontic treatment.
Also, in the patients who underwent heterogenetic implantation, the orthodontic
treatment clearly improved the quality of the osteoplasty.
Conclusions: The essential conditions for a successful osteoplasty include meticulous
operative technique and orthodontic treatment. The latter plays an
essential role at several stages of development in children with clefts. The
“functional stress” on the autologous or heterogenetic implant exerts a decisive
influence on the quality and volume of the osteoplasty, preventing progressive
resorption
