Table 2.

Structural, Static, and Dynamic Histomorphometric Data

Variable	TPTD (n = 21)		PBO (n = 17)		P-Value
	Mean	sd	Mean	sd
Structural
Cancellous bone volume, %	17.51	3.01	17.03	4.64	NS
Trabecular thickness, μm	117.4	15.54	119.4	15.92	NS
Trabecular number, No./mm	1.49	0.18	1.41	0.30	NS
Trabecular separation, μm	668.2	83.3	732.0	190.0	NS
Cortical width, μm	866.2	258.3	917.9	227.0	NS
Cortical porosity area, %	10.56	3.64	9.49	2.79	NS
Cortical porosity number, No./mm2	5.17	1.32	4.80	1.48	NS
Cancellous
Osteoclast number/BS	0.072	0.062	0.052	0.049	NS
Osteoid volume/BV, %	0.523	0.484	0.625	1.116	NS
Osteoid surface/BS, %	4.17	3.75	2.83	3.55	NS
Osteoid thickness, μm	4.98	0.72	5.73	1.39	.056
Wall thickness, μm	25.13	2.54	26.13	1.77	NS
Eroded surface/BS, %	3.36	1.57	3.12	1.21	NS
Adjusted apposition rate, μm/d	1.59	1.03	1.17	0.70	.16
Activation frequency, cycle/y	0.712	0.571	0.305	0.263	.007
Endocortical
Osteoclast number/BS	0.102	0.102	0.091	0.083	NS
Osteoid surface/BS, %	8.95	7.71	5.73	4.72	.12
Osteoid thickness, μm	5.08	1.11	5.82	0.76	.02
Wall thickness, μm	27.70	2.86	29.43	1.85	.037
Eroded surface/BS, %	4.49	2.19	4.89	3.01	NS
Adjusted apposition rate, μm/d	1.67	1.02	1.39	1.07	NS
Activation frequency, cycle/y	1.41	0.90	0.73	0.48	.006
Intracortical
Osteoclast number/BS	0.224	0.201	0.156	0.128	NS
Osteoid surface/BS, %	5.16	3.83	6.06	3.90	NS
Osteoid thickness, μm	5.12	1.04	6.09	0.81	.003
Wall thickness, μm	34.88	3.79	36.25	2.33	NS
Eroded surface/BS, %	6.43	4.16	4.81	2.44	.15
Adjusted apposition rate, μm/d	3.01	2.52	1.62	0.67	.02
Activation Frequency, cycle/y	1.08	0.60	0.98	0.66	NS

Abbreviation: NS, not significant.