[Changes in the mandibular growth after ramus osteotomy in rats]

Area of Science:

• Orthodontics
• Oral and Maxillofacial Surgery
• Developmental Biology

Background:

• Vertical ramus osteotomy is a surgical procedure used in orthodontics and maxillofacial surgery.
• Understanding its impact on mandibular growth is crucial for surgical planning and patient outcomes.

Purpose of the Study:

• To compare mandibular growth between operated and unoperated sides after vertical ramus osteotomy in Wistar rats.
• To evaluate the effect of proximal segment repositioning on mandibular growth deficiencies.

Main Methods:

• Digital image processing of radiographs was used to measure mandibular area and linear distances.
• Bilateral mandibles of growing Wistar rats were analyzed post-osteotomy.

Main Results:

• Slightly retarded mandibular growth was observed on the operated side.
• No obvious asymmetry was detected between the operated and unoperated sides.
• Mandibular growth deficiencies were similar regardless of upward or downward repositioning of the proximal segment.

Conclusions:

• Vertical ramus osteotomy in growing Wistar rats results in minor growth retardation on the operated side.
• The surgical technique does not induce significant mandibular asymmetry.
• Proximal segment repositioning does not appear to influence the degree of growth deficiency.