Table 1. Change in graft height over time.

Period	MeGH (n=39)	MiGH (n=39)	DiGH (n=39)	Mean GH (n=39)
Baseline	16.25±3.20	16.96±3.39	16.27±2.98	16.49±3.03
3 mon	15.94±3.76	16.31±3.91	15.66±3.56	15.97±3.59
6 mon	15.38±3.56	15.50±4.02a)	15.20±3.89	15.36±3.69a)
1 yr	14.97±3.44	15.47±3.22a)	14.96±3.53a)	15.13±3.31a)
2 yr	14.31±3.16a)	14.83±2.88a)	14.41±3.34a)	14.52±3.02a)
3 yr	13.99±3.23a)	14.61±2.68a)	14.17±3.32a)	14.26±2.92a)
3 yr to baseline	−2.26±3.29a)	−2.35±2.90a)	−2.10±2.24a)	−2.24±2.41a)

Values are presented as mean±standard deviation (mm).

MeGH: distance from the implant platform to the base of the grafted sinus floor at the mesial side of the implant, MiGH: distance from the implant platform to the base of the grafted sinus floor at the middle side of the implant, DiGH: distance from the implant platform to the base of the grafted sinus floor at the distal side of the implant, ANOVA: analysis of variance.

^a)Statistically significant decrease in height compared to baseline (P<0.05) by 1-way ANOVA.