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Astuti Pitarini
"ABSTRAK
Pendahuluan Penggunaan megaprostesis sebagai pilihan dalam manajemen LSS
memberikan harapan baru bagi pasien tumor tulang di Indonesia. Namun, sampai
saat ini belum ada data hasil luaran dari tata laksana ini.
Metode Penelitian ini merupakan prospektif observational pada 34 pasien tumor
tulang di RS Cipto Mangunkusumo pada tahun 2011-2015. Diagnosis ditegakkan
melalui Clinical Pathological Conference. Evaluasi pascaoperasi dilakukan pada
bulan ke-3, 6, 9, 12, 24, 36, dan 48 dengan menggunakan skoring dari MSTS.
Luaran onkologi dievaluasi dengan adanya rekurensi dan metastasis jauh.
Komplikasi berupa infeksi, dislokasi, cedera saraf dan pembuluh darah, serta
gangguan mekanisme ekstensor juga dievaluasi.
Hasil Dua orang ahli bedah muskuloskeletal onkologi melakukan operasi LSS dan
rekonstruksi dengan megaprostesis. Dua pasien dieksklusi karena keputusan
intraoperatif untuk memakai non modular endoprostesis. Kehilangan darah
intraoperatif memiliki median (RAK) 890,0 (700,0?1200,0) ml. Skor MSTS
sebagian besar pasien menunjukkan kategori baik dan sangat baik, yaitu 67.9%
baik pada MSTS 6 bulan, 79,2% baik pada MSTS 9 bulan, 63.4% sangat baik
pada 12 bulan, 90% sangat baik pada 24 bulan dan 100% sangat baik pada MSTS
36 bulan. Terdapat hubungan bermakna antara karakteristik pasien yaitu jenis
tumor (p=0,001), usia (p=0,039), jenis kelamin (p=0,049), dan hasil laboratorium
ALP (p=0,031) dengan luaran fungsional MSTS 3 bulan. Terdapat hubungan
bermakna antara karakteristik pasien yaitu perdarahan intraoperatif (p=0,013) dan
ALP (p=0,009) dengan mortalitas; dan juga antara tumor tulang yang menjalani
rekonstruksi jaringan lunak ekstensif dengan komplikasi (p=0,019) namun antara
lokasi tumor dan komplikasi tidak terdapat hubungan bermakna.
Kesimpulan Luaran fungsional pada pasien yang dilakukan rekonstruksi
megaprostesis adalah baik dan sangat baik sehingga dapat menjadi tatalaksana
pilihan bagi pasien tumor tulang yang akan menjalani LSS. Luaran onkologi pada
pasien yang dilakukan prosedur LSS baik dengan rendahnya rekurensi lokal, metastasi, dan komplikasi. ABSTRACT
Introduction Advancement in bone tumor management has elaborated surgeon?s
choice of treatment not merely sentenced the patients into a limb ablation.
Likewise, patients with bone tumors, regardless its malignant nature and limited
survival time, had an equal privileges to opt for LSS to experience a better quality
of life. In this study, we manage to evaluate the functional and oncologic outcome
of lower extremity bone tumors following a LSS using megaprosthesis.
Methods Thirty-four patients with lower extremity bone tumors were
prospectively reviewed between 2011 and 2015 in a tertiary referral general
hospital. All patients were managed through a Clinical Pathology Conference.
Functional outcome was evaluated using MSTS score and follow up was recorded
at 3, 6, 12 months; and 2, 3, 4 years.
Results Two orthopedic musculoskeletal oncologic surgeons were performing the
surgeries. Two patients were excluded because the final instruments used were
not a modular type. The final result of functional score was good to excellent with
67.9% good at 6 months, 79,2% good at 9 months, 63.4% excellent at 12 months,
90% excellent at 24 months and 100% excellent at 36 months. Complications
occurred and varied. A statistical significant result was found between age
(p=0,001), age (p=0,039), gender (p=0,049), SAP (p=0,031) and 3 months
functional outcome; between intraoperative blood loss (p=0,013) and mortality,
as well as SAP with mortality (p=0,009); between tumor that underwent extensive
soft tissue reconstruction procedure and complication (p=0,019).
Conclusion Megaprosthesis reconstruction in bone tumors gives a good and
excellent result, which provides orthopaedic oncologic surgeons a rationalization
to make a selective decision-making in tumor cases regardless its survival and
tumor type. Oncologic outcome as well gave out good result with low incidence of far metastasis and local recurrence.;Introduction Advancement in bone tumor management has elaborated surgeon?s
choice of treatment not merely sentenced the patients into a limb ablation.
Likewise, patients with bone tumors, regardless its malignant nature and limited
survival time, had an equal privileges to opt for LSS to experience a better quality
of life. In this study, we manage to evaluate the functional and oncologic outcome
of lower extremity bone tumors following a LSS using megaprosthesis.
Methods Thirty-four patients with lower extremity bone tumors were
prospectively reviewed between 2011 and 2015 in a tertiary referral general
hospital. All patients were managed through a Clinical Pathology Conference.
Functional outcome was evaluated using MSTS score and follow up was recorded
at 3, 6, 12 months; and 2, 3, 4 years.
Results Two orthopedic musculoskeletal oncologic surgeons were performing the
surgeries. Two patients were excluded because the final instruments used were
not a modular type. The final result of functional score was good to excellent with
67.9% good at 6 months, 79,2% good at 9 months, 63.4% excellent at 12 months,
90% excellent at 24 months and 100% excellent at 36 months. Complications
occurred and varied. A statistical significant result was found between age
(p=0,001), age (p=0,039), gender (p=0,049), SAP (p=0,031) and 3 months
functional outcome; between intraoperative blood loss (p=0,013) and mortality,
as well as SAP with mortality (p=0,009); between tumor that underwent extensive
soft tissue reconstruction procedure and complication (p=0,019).
Conclusion Megaprosthesis reconstruction in bone tumors gives a good and
excellent result, which provides orthopaedic oncologic surgeons a rationalization
to make a selective decision-making in tumor cases regardless its survival and
tumor type. Oncologic outcome as well gave out good result with low incidence of far metastasis and local recurrence.;Introduction Advancement in bone tumor management has elaborated surgeon?s
choice of treatment not merely sentenced the patients into a limb ablation.
Likewise, patients with bone tumors, regardless its malignant nature and limited
survival time, had an equal privileges to opt for LSS to experience a better quality
of life. In this study, we manage to evaluate the functional and oncologic outcome
of lower extremity bone tumors following a LSS using megaprosthesis.
Methods Thirty-four patients with lower extremity bone tumors were
prospectively reviewed between 2011 and 2015 in a tertiary referral general
hospital. All patients were managed through a Clinical Pathology Conference.
Functional outcome was evaluated using MSTS score and follow up was recorded
at 3, 6, 12 months; and 2, 3, 4 years.
Results Two orthopedic musculoskeletal oncologic surgeons were performing the
surgeries. Two patients were excluded because the final instruments used were
not a modular type. The final result of functional score was good to excellent with
67.9% good at 6 months, 79,2% good at 9 months, 63.4% excellent at 12 months,
90% excellent at 24 months and 100% excellent at 36 months. Complications
occurred and varied. A statistical significant result was found between age
(p=0,001), age (p=0,039), gender (p=0,049), SAP (p=0,031) and 3 months
functional outcome; between intraoperative blood loss (p=0,013) and mortality,
as well as SAP with mortality (p=0,009); between tumor that underwent extensive
soft tissue reconstruction procedure and complication (p=0,019).
Conclusion Megaprosthesis reconstruction in bone tumors gives a good and
excellent result, which provides orthopaedic oncologic surgeons a rationalization
to make a selective decision-making in tumor cases regardless its survival and
tumor type. Oncologic outcome as well gave out good result with low incidence of far metastasis and local recurrence.;Introduction Advancement in bone tumor management has elaborated surgeon?s
choice of treatment not merely sentenced the patients into a limb ablation.
Likewise, patients with bone tumors, regardless its malignant nature and limited
survival time, had an equal privileges to opt for LSS to experience a better quality
of life. In this study, we manage to evaluate the functional and oncologic outcome
of lower extremity bone tumors following a LSS using megaprosthesis.
Methods Thirty-four patients with lower extremity bone tumors were
prospectively reviewed between 2011 and 2015 in a tertiary referral general
hospital. All patients were managed through a Clinical Pathology Conference.
Functional outcome was evaluated using MSTS score and follow up was recorded
at 3, 6, 12 months; and 2, 3, 4 years.
Results Two orthopedic musculoskeletal oncologic surgeons were performing the
surgeries. Two patients were excluded because the final instruments used were
not a modular type. The final result of functional score was good to excellent with
67.9% good at 6 months, 79,2% good at 9 months, 63.4% excellent at 12 months,
90% excellent at 24 months and 100% excellent at 36 months. Complications
occurred and varied. A statistical significant result was found between age
(p=0,001), age (p=0,039), gender (p=0,049), SAP (p=0,031) and 3 months
functional outcome; between intraoperative blood loss (p=0,013) and mortality,
as well as SAP with mortality (p=0,009); between tumor that underwent extensive
soft tissue reconstruction procedure and complication (p=0,019).
Conclusion Megaprosthesis reconstruction in bone tumors gives a good and
excellent result, which provides orthopaedic oncologic surgeons a rationalization
to make a selective decision-making in tumor cases regardless its survival and
tumor type. Oncologic outcome as well gave out good result with low incidence of far metastasis and local recurrence.;Introduction Advancement in bone tumor management has elaborated surgeon?s
choice of treatment not merely sentenced the patients into a limb ablation.
Likewise, patients with bone tumors, regardless its malignant nature and limited
survival time, had an equal privileges to opt for LSS to experience a better quality
of life. In this study, we manage to evaluate the functional and oncologic outcome
of lower extremity bone tumors following a LSS using megaprosthesis.
Methods Thirty-four patients with lower extremity bone tumors were
prospectively reviewed between 2011 and 2015 in a tertiary referral general
hospital. All patients were managed through a Clinical Pathology Conference.
Functional outcome was evaluated using MSTS score and follow up was recorded
at 3, 6, 12 months; and 2, 3, 4 years.
Results Two orthopedic musculoskeletal oncologic surgeons were performing the
surgeries. Two patients were excluded because the final instruments used were
not a modular type. The final result of functional score was good to excellent with
67.9% good at 6 months, 79,2% good at 9 months, 63.4% excellent at 12 months,
90% excellent at 24 months and 100% excellent at 36 months. Complications
occurred and varied. A statistical significant result was found between age
(p=0,001), age (p=0,039), gender (p=0,049), SAP (p=0,031) and 3 months
functional outcome; between intraoperative blood loss (p=0,013) and mortality,
as well as SAP with mortality (p=0,009); between tumor that underwent extensive
soft tissue reconstruction procedure and complication (p=0,019).
Conclusion Megaprosthesis reconstruction in bone tumors gives a good and
excellent result, which provides orthopaedic oncologic surgeons a rationalization
to make a selective decision-making in tumor cases regardless its survival and
tumor type. Oncologic outcome as well gave out good result with low incidence of far metastasis and local recurrence."
Fakultas Kedokteran Universitas Indonesia, 2015
SP-PDF
UI - Tugas Akhir  Universitas Indonesia Library
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Yogi Prabowo
"Reseksi tulang distal femur memerlukan tindakan rekonstruksi defek osteoartikular menggunakan megaprostesis distal femur. Rekonstruksi megaprostesis memiliki masa pakai terbatas yang membutuhkan tindakan pergantian atau revisi. Tindakan revisi megaprostesis menimbulkan kehilangan masa tulang dan membutuhkan ukuran megaprostesis yang lebih panjang. Belum ada megaprostesis dengan ruang tandur tulang yang dapat memfasilitasi regenerasi tulang.
Penelitian ini mengembangkan desain prototipe megaprostesis dengan metode reverse engineering menggunakan CT scan femur orang dewasa dan implan megaprostesis benchmarking, melakukan pengujian simulasi Finite Element Analysis (FEA) dan pengujian biomekanik menggunakan mesin uji Universal Tensile Machine (UTM) Tensilon RTF-2350 berdasarkan skema ISO 10328 dan ASTM F1800, analisis antropometri ekstremitas bawah dan lutut pada anak remaja dan dewasa dan implementasi pada kadaver untuk mendeskripsikan langkah pembedahan dan analisis inter-observer diskusi pakar tentang kelayakan pemasangan prototipe.
Prototipe α plus megaprostesis femur distal dengan ruang tandur tulang dibuat dari bahan stainless steel dan polyethylene dengan menggunakan mesin Computer Numerical Control/CNC 3 dan 5 aksis. Prototipe ini adaptif secara modular dengan paku intrameduler femur (femoral intramedullary nail) dan pelat pengunci (broad plate locking). Kombinasi ini memberi ruang tandur tulang untuk menerapkan tehnik Masquelet dalam regenerasi tulang. Pada simulasi Finite Elemen Analysis (FEA) dan pengujian biomekanik didapatkan titik lemah pada sambungan ujung distal paku intrameduler femur dengan sekrup pengunci (locking screw) , femoral block step (FBS) 1 dan 2 yang terbuat dari polyethylene dan sambungan pelat pengunci dengan sekrup pada femur proksimal. Terdapat perbedaan antropometri ekstremitas bawah dan sendi lutut antara anak remaja dan dewasa, laki laki dan perempuan yang memberikan pertimbangan pembuatan ukuran implan yang berbeda. Tehnik pembedahan dan pemasangan implan dapat diimplementasi pada kadaver dan lebih dari 60 % pakar ortopedi onkologi memberikan opini sangat baik terhadap kelayakan pembedahan dan pemasangan implan prototipe.
Prototipe α plus megaprostesis femur distal dengan ruang tandur tulang berpotensi memberikan solusi dalam hal ruang untuk regenerasi tulang dengan penyempurnaan desain dan pemilihan bahan manufaktur implan yang lebih baik untuk diterapkan pada manusia.

Resection for femur distal bone requires the reconstruction of osteoarticular defects using distal femur megaprostheses. Megaprosthesis reconstruction has a limited lifespan that requires further replacement or revision. The revision of the megaprosthesis causes bone loss and requires a longer megaprosthesis size. There is no megaprosthesis with a bone chamber that can facilitate bone regeneration.
This study develop a prototype design of a megaprosthesis by reverse engineering method using CT scan of adult femur and benchmarking megaprosthesis implant, conducted Finite Element Analysis (FEA) simulation testing and biomechanical testing using the Tensilon RTF-2350 Universal Tensile Machine (UTM) testing machine based on ISO 10328 and ASTM F1800 schemes, anthropometric analysis of lower extremities and knees in adolescents and adults and implementation on cadavers to describe surgical steps and inter-observer analysis expert discussion on the feasibility of prototyping.
The prototype α plus distal femur megaprosthesis with a bone chamber is made from stainless steel and polyethylene materials using 3 and 5 axis Computer Numerical Control/CNC machines. The prototype is modularly adaptive with femoral intramedullary nails and broad plate locking. This combination gives the bone chamber to apply the Masquelet technique in bone regeneration. Simulation of Element Analysis (FEA) and biomechanical testing show weakness points were obtained at the distal end joints of intramedullary femoral nail with locking screw, femoral block steps (FBS) 1 and 2 which made of polyethylene, and the connection of the locking plate with screws on the proximal femur was obtained. There are differences in the anthropometry of the lower extremities and knee joints between adolescents and adults, men and women, which gives consideration to the manufacture of different implant sizes. Surgical techniques and implant placement can be implemented on the cadaver and more than 60% of orthopedic oncology experts give a very good opinion on the feasibility of surgery and installation of prototype implants.
The prototype of α plus distal femur megaprosthesis with bone plantation chamber has the potential to provide a solution in terms of space for bone regeneration with improved design and better selection of implant manufacturing materials for application in humans.
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Jakarta: Fakultas Kedokteran Universitas Indonesia, 2025
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UI - Disertasi Membership  Universitas Indonesia Library