Table 2. Comparison of PTV for different surface treatments over time.

RBM: Resorbable blast media; HA: Hydroxyapatite; SLA: Sandblasting combined acid etching; PTV: Periotest values

Surface treatment	RBM	HA	Hydrothermal-treated HA	SLA
Initial	–5.46±0.55	–5.21 ±0.72	–5.64±0.61	–6.18±0.37
2 week	–4.64±1.98	–4.44±2.17	–5.13±0.73	–5.23±1.11
4 week	–5.53±0.79	–5.33±0.67	–5.44±1.16	–6.18 ±0.43