Development of screwdriver for maxillofacial miniplate implant with torque-limiting capability

Supriadi, Sugeng; Habibyanto, Ryan Nur; Ayman, Muhammad Tsabit; Muhamad, Wahid

doi:10.1063/1.5096674

Cited by 1 publication

(2 citation statements)

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“…The present study's screwdriver was designed using SolidWorks ® . It has a round-shaped handle, which demonstrated the best ergonomics [2] when tested by several Indonesian surgeons. In this design, a shaft will hold the ring gear in the second epicyclic gear set; it will automatically define the upper side of the screw because the shaft is immovable.…”

Section: Methodology Model and Designmentioning

confidence: 99%

“…The front part is rotatable and is usually rotated by the user's fingers (Figure 1), while the rear part fits into the palm of the user's hand, which is held fixed [1]. Some studies have reported making improvements in miniscrew surgical screwdrivers that include the ability to limit torque in miniscrew insertion in order to avoid a stripping of the bone caused by over torque [2] and a modification that adds an auxiliary positioning attachment in order to achieve a precise height for avoiding any tissue injuries [3].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the Gear Stress of Novel Reverse Rotation Bit Manual Screwdriver Design for Miniscrew Implants

Umas

Supriadi²,

Whulanza³

et al. 2021

JMechE

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One of the problems faced by the screwdrivers used for craniomaxillofacial implant fixation is that the maximum torque required for implant removal is significantly higher than the maximum torque needed for inserting implants. Another problem is that the hand torque produced by a right-handed person is lower in the counterclockwise direction, which is the removal direction for miniscrews. The novel design presented here of a manual screwdriver equipped with an epicyclic gear will produce a reverse bit rotation and provide the mechanical advantage of higher torque output. In this study, simulations were conducted by varying the torque input within the range of 0-1000 Nmm with an applied load in each simulation to be adapted based on the epicyclic gear set. The materials used in this study are AISI 316L and Ti6Al4V. The maximum Von Mises stress value was observed in the sun gear from the second gear set at 522.59 MPa (AISI 316L) and 430.76 MPa (Ti6Al4V) for the maximum torque input, which was followed by the planetary and ring gear from the second gear set and then the planetary gear, ring gear, and sun gear from the first gear set. The total deformation also showed the difference between the two materials; the deformation when using AISI 316L as the material was lower than when using Ti6Al4V

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Section: Methodology Model and Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%