“In nose file design, material selection, tooth structure, friction angle and tooth depth are critical factors that directly affect surgical performance. With my technical background and surgical experience, I have seen that extremely hard materials such as tungsten carbide are not always suitable for surgical use. Although tungsten carbide is known for its hardness, it can break even during sterilization. Therefore, we preferred high-hardness steel. Steel is both durable and more flexible, increasing the performance of the hand file.

In terms of design, we switched to a flat tooth structure because the cross tooth structure is more likely to leave marks on the bone. Flat teeth provide smoother results and allow the file to work without leaving marks on the bone surface. Although 90 degrees is generally accepted as the standard for friction angle, we reduced this angle below 90 degrees, making the file much faster and more effective. Tooth depth is also a very critical factor. If the teeth are too shallow, the file fills with bone shavings and becomes clogged. If it is too deep, it can cause trouble by making a rough process during filing. That’s why we optimized the tooth depth, so the rasp both collects the bone shavings and works quickly without filling.

100 to 200 surgeries can be easily performed with a hand rasp, and this new design we produced can work even faster than motorized piezoelectric devices. While the heat production of motorized devices sometimes makes surgical control difficult, our rasp completely eliminates this problem since it does not produce heat. In closed rhinoplasty, we added a small angle between the rasp tip and the handle in order to work without damaging the nostril. In this way, the rasp can move easily inside the nose.

Finally, this design also offers a great advantage in terms of price. Although power devices are supported by advertisements and sold expensively, surgeons can achieve the same or even better performance with our steel rasp at a much lower cost. As an indication of this success, the rasp we developed was named ‘Çakır Raspüsü’ and Ankara-based Medisoft company started to export this product from Turkey to many countries. Both its design and production quality provided serious advantages in surgical applications.”