Author : Dr. Naqoosh Haidry, Dr. Ritesh Raj, Dr.Brijesh Byrappa, Dr. Amit Kumar, Dr. Manish Kumar, Dr. Anshu Prakash

Aim and objective: The aim and objective of the current study was to evaluate the effectiveness of alveolar distraction osteogenesis technique radiographically for vertical reconstruction of atrophy alveolar ridges in partially edentulous patients.

Materials and Methods: A total of 120 vertical distraction osteogenesis procedures were performed in110 patients. Two panoramic radiographies were performed in all patients, one the day before the beginning of distraction, and one after consolidation period, 18 weeks postoperatively. The radiographic analysis consisted of obtaining the amount of the vertical bone gain in each radiography. For this, we
obtained initially the magnification factor of each panoramic radiography by dividing the real size of the activation rod among the image size of the activation rod. After this, to obtain the VGB, we measured initially the length of the distractonpre activation (LD1), which consisted of the distance between the superior portion of the basal plate and the superior portion of the transport plate, multiplying by the
magnification factor. Then, we measured the length of the distraction postactivation (LD2), using the same method described before, in radiographies performed 12 weeks postoperatively. The vertical bone gain was obtained using the following formula: vertical bone gain = LD2 — LD1. The results were applied to descriptive statistical analysis.Complications were also investigated during all of the treatments.

Results: The mean alveolar distraction achieved in 120 cases was 7.21 (range, 0 to 10.83 mm). According to the region treated, 50.8% were in the posterior mandible (mean vertical bone gain , 4.60 mm, DP: 2.04), 37.68% were in the anterior maxilla (mean vertical bone gain,7.46 mm, DP: 2.28), 7.33% were in the anterior mandible (mean vertical bone gain, 6.73 mm, DP: 2.04), and 4.33% were in the posterior maxilla (mean vertical bone gain, 6.32 mm, DP:2.65).

Conclusions: The Alveolar Distraction Osteogenesis technique was demonstrated to be an effective tool to treat vertical defects of the alveolar ridge with a success rate of 92.64%. Our radiographic analysis seems to be an important tool in verifying the technique as well as planning implant placement after Alveolar Distraction Osteogenesis.

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