ANALISIS STABILITAS BIOMEKANIK FIKSASI MANDIBULA PADA BILATERAL SAGITTAL SPLIT OSTEOTOMY: Studi in Silico Menggunakan Finiten Element Analysis dan Orthogonal Array Taguchi L9
Luthfir Rahman Nugraha Putra, drg. Cahya Yustisia Hasan, Sp.B.M.Mf., Subsp.C.O.Mf; drg. Pingky Krisna Arindra, Sp.B.M.Mf., Subsp.Ped.O.Mf.
2026 | Tesis-Spesialis | S2 Ilmu Bedah Mulut
Bilateral Sagittal Split Osteotomy (BSSO) merupakan prosedur utama dalam koreksi deformitas
mandibula yang menuntut stabilitas biomekanik optimal untuk mencegah relaps
dan gangguan penyembuhan. Variasi konfigurasi fiksasi dan kondisi pembebanan
fungsional memengaruhi distribusi von Mises stress serta tekanan kontak pada
sistem tulang dan implant. Penelitian ini bertujuan mengevaluasi stabilitas
biomekanik tiga metode fiksasi mandibula, yaitu pelat tunggal monokortikal,
pelat ganda monokortikal, dan hybrid, serta menentukan metode yang
paling optimal melalui pendekatan numerik.
Penelitian ini merupakan studi eksperimental in silico
menggunakan finite element analysis (FEA) dengan desain Orthogonal
Array Taguchi L9. Analisis difokuskan pada distribusi von Mises stress dan
tekanan kontak pada tulang, pelat, dan sekrup. Faktor dominan diidentifikasi
melalui nilai delta S/N ratio, kemudian dilakukan evaluasi komparatif
dan analisis multikriteria menggunakan Analytic Hierarchy Process (AHP)
dengan Consistency Ratio 0,03.
Hasil menunjukkan perbedaan distribusi von Mises stress
dan tekanan kontak antar sistem fiksasi. Pelat tunggal monokortikal
memperlihatkan distribusi von Mises stress yang lebih terkendali dan
tekanan kontak relatif lebih rendah dibandingkan pelat ganda dan hybrid.
Gaya mastikasi merupakan faktor paling dominan (?S/N=8,59). Skor terintegrasi
AHP menunjukkan pelat tunggal memiliki nilai tertinggi (0,68), diikuti pelat
ganda (0,66) dan hybrid (0,15). Stabilitas optimal lebih ditentukan oleh
keseimbangan distribusi beban daripada rigiditas maksimum sistem fiksasi.
Bilateral Sagittal Split
Osteotomy (BSSO) is a primary procedure for correcting mandibular deformities
and requires optimal biomechanical stability to prevent relapse and impaired
healing. Variations in fixation configuration and functional loading conditions
influence the distribution of von Mises stress and contact pressure within the
bone–implant system. This study aimed to evaluate the biomechanical stability
of three mandibular fixation methods, single monocortical plate, double
monocortical plate, and hybrid also to determine the most optimal configuration
using a numerical approach.
This experimental in silico study employed finite
element analysis (FEA) with an Orthogonal Array Taguchi L9 design. The analysis
focused on von Mises stress distribution and contact pressure in bone, plates,
and screws. Dominant factors were identified using delta S/N ratio values,
followed by comparative evaluation and multi-criteria analysis using the
Analytic Hierarchy Process (AHP) with a Consistency Ratio of 0.03.
The results demonstrated differences in von Mises stress
distribution and contact pressure among fixation systems. The single
monocortical plate exhibited more controlled stress distribution and relatively
lower contact pressure compared to the double plate and hybrid systems.
Masticatory force was identified as the most dominant factor (?S/N = 8.59). The
integrated AHP scoring indicated that the single plate achieved the highest
score (0.68), followed by the double plate (0.66) and hybrid system (0.15). Optimal
stability was determined to depend more on balanced load distribution than on
maximum structural rigidity of the fixation system.
Kata Kunci : BSSO, finite element analysis, von Mises stress, tekanan kontak, stabilitas biomekanik
