Table 2.

Comparisons of conventional methods: laser resonance frequency analysis has the advantages of protectability, repeatability, reproducibility, and contactability.

	Protectability	Repeatability	Reproducibility	Contactability
Pull-Down	×	×	×	×
Hammer Instrument	○	×	×	×
Dental RFA	○	○	○	×
Laser RFA	○	○	○	○