Vertical Ridge Augmentation of the Atrophic Posterior Mandible with Sandwich Technique: Bone Block from the Chin Area versus Corticocancellous Bone Block Allograft—Clinical and Histological Prospective Randomized Controlled Study

Table 3

Group	Obs	Mean	Std. error	Std. deviation	95% conf. I.
Group Ctrl	12	48.97	1.878.241	5.939.519	44.72112; 53.21888
Grouptest	12	41.28	1.888.491	5.971.934	41.84335; 48.40665

Marrow space, t value = 2.8872, and P value = 0.0098. There is statistically significant difference.