Evalutation of Maxilla Stability in Cleft Patients with Le Fort 1 Maxillary Advancement

Context: le fort 1 maxillary osteotomy in operated patients of cleft lip and palate (CLCP). AIMS: to study stability of le fort 1 maxillary osteotomy in operated patients of CLCP by two-imensional evaluation using cephalometric analysis.

Setting and Design: Prospective study conducted at Sree Balaji dental collage and Hospital from 2016-2018.

Materials and Method: Subjects included 3 consecutively operated patients of CLCP with maxillary hypoplasia. Maxillary advancement be le fort 1 maxillary step osteotomy was performed. There was two males and one females with an age of range of 18 to 20 years and follow up range was 6 to 24 months. presurgical and postsurgical changes were compared usingcephalometricsfor orthognathic surgery (cogs) system to determine stability of maxillary movements and quantify relapse at 21 days and 18 months.

Statistical Analysis: Student t-test.

Result: Mean linear horizontal advancement achieved along nasion (N) to anterior nasal spine (ANS) with reference to true vertical plane at 21 days and 18 months was 4.17 and 2.91mm,respectively. The mean relapse in anteroposterior dimension was 20.63%. the mean vertical displacement observed along nasion and ANS with reference to true horizontal plane at 21 days and 18 months was 4.21mm and 2.3, respectively with a resultant relapse of 38.54%.

Conclusion: Based on clinical and COGS analysis, it is evident that le fort 1 advancement in operated cases of CLCP has inherent potential for relapse.