Relapse in alveolar distraction osteogenesis: an indication for overcorrection.
OBJECTIVE
The aim of this study was to indicate the necessity of overcorrection regarding the occurrence of bone height relapse at the end of consolidation period in distracted alveolar bone.


METHODS
Eleven patients with a total of 17 distractions performed and 43 implants placed were included in this study. Bone height was evaluated on computed tomography before the procedure and on orthopantomographic radiographs following distraction and consolidation. Measurement was performed on the aproximal surfaces of implants and on identical points before and after distraction.


RESULTS
The mean of distraction performed was 6.08 +/- 1.82 mm at mesial points and 6.18 +/- 1.90 mm at distal points of measurement. The mean of bone relapse following consolidation period was 1.57 +/- 1.82 mm at the mesial and 1.79 +/- 1.68 mm at the distal aspects of implants. Statistical evaluation revealed that alveolar bone distraction should include 20% of overcorrection for both mesial and distal points of measurements plus 0.34 mm for mesial and 0.52 mm for distal points of measurement.


CONCLUSIONS
Occurrence of relapse found in this study indicates that overcorrection should be included when performing alveolar distraction osteogenesis.
Department of Stomatolgy, Facultad de Odontologia, University of Santiago de Compostela, Complejo Hospitalario Universitario de Santiago, Santiago de Compostela, Spain.
Nikola
N
Saulacic
Manuel
M
Somoza-Martin
Pilar
P
Gándara-Vila
Abel
A
Garcia-Garcia
D000328:Adult; D000367:Age Factors; D000540:Alveolar Ridge Augmentation / Q000379:methods*; D003758:Dental Implantation, Endosseous; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D019857:Osteogenesis, Distraction; D012008:Recurrence