From:  Centre versus peripheral tapping during lateral window sinus lift preparation: an ex vivo comparative study

 Comparison of residual peripheral bone rim thickness between centre and peripheral tapping techniques.

Measurement siteCentre tapping (n = 20)
mean ± SD (mm)
Peripheral tapping (n = 20)
mean ± SD (mm)
Mean difference (mm)*p-value†
Superio-anterior0.14 ± 0.010.26 ± 0.020.12< 0.001
Superior0.24 ± 0.010.27 ± 0.010.03< 0.001
Superio-posterior0.10 ± 0.020.12 ± 0.020.020.007
Inferio-posterior0.12 ± 0.020.13 ± 0.010.010.165
Inferior0.09 ± 0.020.13 ± 0.020.04< 0.001
Inferio-anterior0.09 ± 0.020.19 ± 0.020.10< 0.001

* Mean difference calculated as peripheral tapping minus centre tapping. Values are mean ± standard deviation (SD). † Two-sided p-values recalculated from the available group-level means, SDs, and sample sizes using independent-samples t-tests.