## 4 Discussion
With the compaction of cancellous bone by viscoelastic and plastic deformation and autografting effect, the osseedonsification technique preserves the bone volume ([PERSON] et al., 2018). The insertion torque of 25 Ncm with standard drilling is increased to 49 Ncm with the osseedonsification technique ([PERSON] et al., 2018). The residual strains of viscoelasticity create compressive forces against the surface of implants, called the springback effect, which increases IPS and BIC ([PERSON] et al., 2018). In addition to high IPS, it was reported that osseedonsification drilling exhibited higher secondary stability than subtractive drilling during the first 6 weeks without detrimental effect ([PERSON] et al., 2018; [PERSON] et al., 2018). The preparation of the ososedensification technique should start with a smaller diameter than the conventional technique because of the recovery of elastic strain. Owing to its special design and usage, a condensed autografted bone layer is created around the periphery and at the apex of the hole ([PERSON] et al., 2018; [PERSON] et al., 2018). If the hole of the ososedensified osteotomy remained empty, the hole diameter was decreased by 91%. It is important to obtain a high IPS and BIC for osseointegration of implants ([PERSON] et al., 2018). When the ososedensification technique was used, the diameter of the osteotomy site became more condensed in the scanning electron microscope and micro-CT images, and the rate of contact between the bone and implant surface became three times higher. The densification of the bone did not occur in the cortical bone, as it lacked elasticity. Similar results were obtained in this study. The gap of HU in the bone using the osseedonsification technique in the counter-clockwise direction was greater than that using the conventional technique and ososedensification technique in the clockwise direction. This indicates that the ososedensification technique compacts the bone around the hole and increases bone density. This is probably because osseedonsification burs deposit bones rather than subtract during counter-clockwise rotation. [PERSON] et al. evaluated the effect of the ososedensification technique on IPS and compared it with the conventional technique ([PERSON] et al., 2018). In total, 48 implants with a different tread design were inserted into the head of a cow femur using conventional and ososedensification techniques. The PTVs were measured to evaluate the IPS. There was no statistically significant difference in the PTV between conventional and ososedensification techniques. The PTV of the conventional technique was better than that of the ososedensificationtechnique. This may be because the osseeddensification technique is not useful in dense, compact bones such as Type I and II. It was shown that the osseedensification technique is ineffective and not essential when the quality and quantity of the bone bed are good. In this study, conducted in low-density bone, the osseedensification technique had a higher IPS than the conventional technique, regardless of the direction. In particular, the IPS of the osseedensification technique in the clockwise direction was higher than the conventional technique, even under the same conditions controlled. This means that the design of the osseedensification bur is more effective to increase IPS than the conventional bur. [PERSON] et al. investigated the effect of the osseedensification technique on ISQ, insertion torque, and removal torque in pig tibia bones [25]. A total of 100 osteectomies were performed, and the osseedensification technique was compared with the conventional technique. Insertion and removal torques were measured manually using an analog Torque Gauge. All osseedensification technique values were significantly higher than those of the conventional technique. It was concluded that the osseedensification technique increases the ISQ, insertion torque, and removal torque, which means a high IPS. Experiments of this study were conducted in low-density bone.