Long term stability and relapse following mandibular advancement and mandibular setback surgeries: a cephalometric study.
BACKGROUND
The aim was to evaluate the long-term hard and soft tissue changes following mandibular advancement and setback surgeries.


METHODS
A total of 16 subjects each were selected who underwent bilateral sagittal split osteotomy mandibular advancement and mandibular setback groups. Pre-surgical (T1), immediate post-surgical (T2) and long-term post-surgical (T3) cephalograms were compared for hard and soft tissue changes. After cephalometric measurements, the quantity of changes between T1-T2 and T1-T3 were determined for each patient. The mean difference between T1-T2 and T1-T3 was compared with assess the long-term changes and stability.


RESULTS
In mandibular advancement the mean difference between immediate post-surgical and long term post-surgical is 7%, which accounts for a relapse of 7%. In mandibular setback, the mean difference between immediate post-surgical and long-term post-surgical is 29%, which accounts for a relapse of 29%.


CONCLUSIONS
Mandibular advancement remained stable over the long period when compared to mandibular setback.
Reader, Department of Orthodontics, College of Dental Science, Bhavnagar, Gujarat, India.
S Vinay
SV
Darshan
Reader, Department of Orthodontics, School of Dental Sciences, Karad, Satara, Maharashtra, India.
Yusuf Ahammed
YA
Ronad
Professor, Department of Orthodontics, SVS Institute of Dental Science, Mahbubnagar, Telangana, India.
M S V
MS
Kishore
Professor and Head, Department of Orthodontics, Bapuji Dental College, Davangere, Karnataka, India.
K Sadashiva
KS
Shetty
Reader, Department of Orthodontics, M R Ambedkar Dental College, Bengaluru, Karnataka, India.
M
M
Rajesh
Tutor, Department of Prosthodontics, College of Dental Science, Bhavnagar, Gujarat, India.
S D
SD
Suman
Stability; surgical mandibular advancement; surgical mandibular setback