How does the mandible grow after early high condylectomy?

Area of Science:

• Orthodontics and Maxillofacial Surgery
• Craniofacial Development
• Surgical Outcomes

Background:

• Condylar hyperplasia (CH) can necessitate high condylectomy (HC) to address overgrowth.
• Early HC in young patients raises concerns about potential growth inhibition and subsequent asymmetry.
• The contralateral condyle continues to grow post-surgery, potentially impacting facial symmetry.

Purpose of the Study:

• To investigate mandibular development after early high condylectomy (HC) in growing patients.
• To assess the operated side's growth in absolute terms and relative to the unaffected side.
• To determine if early HC leads to asymmetry in growing individuals.

Main Methods:

• Longitudinal study of 8 consecutive growing patients (1 male, 7 females) undergoing HC.
• 3 orthopantomographies taken at diagnosis (T0), post-surgery (T1), and follow-up (T2).
• Mattila tracing method used to measure condyle, ramus, and vertical structures; statistical analysis with Student t test and Wilcoxon matched pairs test (P < 0.05).

Main Results:

• The operated side showed decreased growth from T0 to T1, followed by growth resumption from T1 to T2.
• Overcorrection was noted initially on the operated side.
• Overall growth of the operated side from T0 to T2 was not statistically different from the healthy side (P < 0.05).

Conclusions:

• Early high condylectomy (HC) in growing patients with condylar hyperplasia appears to allow for continued, relatively normal growth of the operated mandibular side.
• The surgical procedure, despite initial growth reduction, does not seem to create significant long-term asymmetry.
• These findings suggest that HC can be a viable option for managing condylar hyperplasia in young patients without compromising overall mandibular symmetry.