Shape Optimization of Bone-Bonding Subperiosteal Devices with Finite Element Analysis

Abstract

Subperiosteal bone-bonding devices have been proposed for less invasive treatments in orthodontics. The device is osseointegrated onto a bone surface without fixation screws and is expected to rapidly attain a bone-bonding strength that successfully meets clinical performance. Hence, the device's optimum shape for rapid and strong bone bonding was examined in this study by finite element analyses. First, a stress analysis was performed for a circular rod device with an orthodontic force parallel to the bone surface, and the estimate of the bone-bonding strength based on the bone fracture criterion was verified with the results of an animal experiment. In total, four cross-sectional rod geometries were investigated: circular (Cr), elliptical (El), semicircular (Sc), and rectangular (Rc). By changing the height of the newly formed bone to mimic the progression of new bone formation, the estimation of the bone-bonding strength was repeated for each geometry. The rod with the Rc cross section exhibited the best performance, followed by those with the Sc, El, and Cr cross sections, from the aspects of the rapid acquisition of strength and the strength itself. Thus, the rectangular cross section is the best for rod-like subperiosteal devices for rapid bone bonding.

Optimization of Loading Condition for Maxillary Molar Intrusion with Midpalatal Miniscrews by Using Finite Element Analysis

“…Among various attempts to overcome this difficulty, FE analysis has been commonly utilized. FE analysis is a numerical method that calculates the stresses and determines the mechanical behavior of complex structures [26]. Recently, the predictability of FE analysis in orthodontic treatment has been validated by evaluation with clinical feedbacks [27].…”

Subperiosteal Anchorage in Orthodontics: A Narrative Review

“…Semicircular onplants were also tested and they have proved to have greater strength than circular onplants [22]. Ogasawara et al performed a finite element analysis to determine the shape optimization of the subperiosteal devices; the study group concluded that a rectangular cross-section is the most mechanically favorable to guarantee higher resistance to bonding strength in simulated rat calvarium bone [24].…”