Open AccessEvaluation of mechanical strengths of three types of mini‐implants in artificial bones
Author(s) -
Tseng YuChuan,
Wu JuHui,
Ting ChunChan,
Chen HongSen,
Chen ChunMing
Publication year - 2017
Publication title -
the kaohsiung journal of medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.439
H-Index - 36
eISSN - 2410-8650
pISSN - 1607-551X
DOI - 10.1016/j.kjms.2016.11.001
Subject(s) - medicine , titanium , biomedical engineering , titanium alloy , orthodontics , alloy , composite material , nuclear medicine , materials science , metallurgy
We investigates the effect of the anchor area on the mechanical strengths of infrazygomatic mini‐implants. Thirty mini‐implants were divided into three types based on the material and shape: Type A (titanium alloy, 2.0 × 12 mm), Type B (stainless steel, 2.0 × 12 mm), and Type C (titanium alloy, 2.0 × 11 mm). The mini‐implants were inserted at 90° and 45° into the artificial bone to a depth of 7 mm, without predrilling. The mechanical strengths [insertion torque (IT), resonance frequency (RF), and removal torque (RT)] and the anchor area were measured. We hypothesized that no correlation exists among the mechanical forces of each brand. In the 90° tests, the IT, RF, and RT of Type C (8.5 N cm, 10.2 kHz, and 6.1 N cm, respectively) were significantly higher than those of Type A (5.0 N cm, 7.7 kHz, and 4.7 N cm, respectively). In the 45° test, the RFs of Type C (9.2 kHz) was significantly higher than those of Type A (7.0 kHz) and Type B (6.7 kHz). The anchor area of the mini‐implants was in the order of Type C (706 mm 2 ) > Type B (648 mm 2 ) > Type A (621 mm 2 ). Type C exhibited no significant correlation in intragroup comparisons, and the hypothesis was accepted. In the 90° and 45° tests, Type C exhibited the largest anchor area and the highest mechanical strengths (IT, RF, and RT) among the three types of mini‐implants. The anchor area plays a crucial role in the mechanical strength of mini‐implants.