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Sains Malaysiana 53(5)(2024): 1201-1218
http://doi.org/10.17576/jsm-2024-5305-17
Developing A Temporary External Fixator (TEF) For
Mandibular Reconstruction Using Two-Phase QFD And TRIZ Approach
(Pembangunan Peranti
Penetap Luaran Sementara (TEF) untuk Pembinaan Semula Mandibel menggunakan
Pendekatan QFD dan TRIZ Dua Fasa)
RUNGSAN
CHAIYACHET1, APICHART BOONMA1,* & TEERAWAT PAIPONGNA2
1Department of Industrial Engineering, Faculty
of Engineering, Khon Kaen University, Khon Kaen 40002, Thailand
2Dental Department, Sakon Nakhon Hospital,
Sakon Nakhon 47000, Thailand
Received: 14 August 2023/Accepted: 22 April 2024
Abstract
A temporary external
fixator (TEF) is a device used to bridge resection defects after sequestrectomy
and before secondary mandibular reconstruction surgery. A well-designed TEF
should be customizable and adjustable to accommodate individual patient needs.
This study developed a TEF for mandibular reconstruction using the quality
function deployment (QFD) and the theory of inventive problem-solving (TRIZ).
Customer needs (CNs) were investigated from literature reviews and a survey.
Subsequently, a questionnaire was developed, refined, and delivered to 22
experts to identify the essential principles of TEF. Afterwards, the QFD
priorities were analyzed based on the acquired CNs and technical requirements
(TRs), and the top priorities were found to be safety and adequate operational
space. The guidelines for developing a TEF with TRIZ were established as
follows: First, using carbon fiber epoxy composite and Ti-6Al-4V as the
material for TEFs is recommended Second, permanent magnet should be inserted
into the clamp lock bolts to prevent them from falling off during surgery.
Last, replacing one Schanz screw with three Bicortical screws is recommended
for the fixator pins. Additionally, it was also found that changing the screw
size from 2.5–4.0 mm to 2.0–2.4 mm could reduce hole defects in the mandible.
Keywords: Mandibular
reconstruction; quality function
deployment; temporary external fixator; theory of inventive problem-solving
Abstrak
Penetap luaran
sementara (TEF) adalah peranti yang digunakan selepas sekuestrektomi dan
sebelum pembedahan kedua pembinaan semula mandibel untuk mengantara kelompangan
kesan reseksi. Rekaan TEF yang baik haruslah boleh disesuaikan dan dilaraskan
untuk memenuhi keperluan setiap pesakit. Kajian pembangunan TEF untuk pembinaan
semula mandibel ini menggunakan kaedah penerapan ciri berkualiti (QFD) dan
teori penyelesaian masalah inventif (TRIZ). Kaedah kajian yang digunakan untuk
mengetahui keperluan pelanggan (CNs) adalah daripada tinjauan kepustakaan dan
kaedah tinjauan. Satu set soal selidik kemudiannya dibangunkan, diperinci dan
dihantar kepada 22 pakar untuk mengenal pasti prinsip penting TEF. Seterusnya,
keutamaan QFD dianalisis berdasarkan CNs dan keperluan teknikal (TRs) tersebut.
Keutamaan tertinggi adalah keselamatan dan ruang operasi yang mencukupi; oleh
itu, garis panduan untuk membangunkan TEF melalui TRIZ telah ditetapkan.
Pertama, adalah disyorkan untuk menggunakan komposit epoksi gentian karbon dan
Ti-6Al-4V sebagai bahan untuk TEF. Kedua, magnet kekal hendaklah dimasukkan ke
dalam bolt kunci pengapit untuk mengelakkannya daripada jatuh semasa
pembedahan. Dan terakhir, disyorkan untuk menggantikan satu skru Schanz pada
pin penetap dengan tiga skru mini. Kajian juga mendapati bahawa mengubah saiz
skru dari 2.5–4.0 mm kepada 2.0-2.4 mm boleh mengurangkan kecacatan lubang di
mandibel.
Kata kunci: Kaedah
penerapan ciri berkualiti; pembinaan semula mandibel; penetap luaran sementara;
teori penyelesaian masalah inventif
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*Corresponding
author; email: Apicbo@kku.ac.th
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