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

 

Diserahkan: 14 Ogos 2023/Diterima: 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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*Pengarang untuk surat-menyurat; email: Apicbo@kku.ac.th

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   

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