Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

Abduo, Jaafar; Palamara, Joseph E. A.

doi:10.1186/s40729-021-00355-6

International Journal of Implant Dentistry

Table 2 Summary of the trueness, precision, inter-implant distance deviation and angle deviation of every impression technique for parallel and divergent implants model

From: Accuracy of digital impressions versus conventional impressions for 2 implants: an in vitro study evaluating the effect of implant angulation

	Parallel implants model					Divergent implants model					p values between parallel implants and divergent implants models
	NSP	SP	TS	MT	TD	NSP	SP	TS	MT	TD	NSP	SP	TS	MT	TD
Trueness
Mean (μm)	87.4	70.6	50.2	65.7	84.5	198.7	120.9	74.7	76.6	112.3	0.003	0.09	0.06	0.40	0.21
SD (μm)	42.4	26.8	28.2	31.2	40.3	94.2	84.5	27.2	25.2	53.7	0.003	0.09	0.06	0.40	0.21
p values	All groups = 0.12					All groups < 0.001
						NSP vs SP = 0.065		NSP vs TS = 0.001
						NSP vs MT = 0.001		NSP vs TD = 0.031
						SP vs TS = 0.49		SP vs MT = 0.53
						SP vs TD = 0.99		TS vs MT = 0.99
						TS vs TD = 0.68		MT vs TD = 0.72
Precision
Mean (μm)	105.6	119.4	56.7	99.8	119.5	169.3	137.4	84.6	129.0	131.2	<0.001	0.15	<0.001	0.09	0.48
SD (μm)	46.3	56.7	24.8	47.7	68.5	95.9	59.7	40.7	104.0	87.5	<0.001	0.15	<0.001	0.09	0.48
p values	All groups < 0.001					All groups < 0.001
	NSP vs SP = 0.70		NSP vs TS < 0.001			NSP vs SP = 0.34		NSP vs TS < 0.001
	NSP vs MT = 0.98		NSP vs TD = 0.70			NSP vs MT = 0.13		NSP vs TD = 0.17
	SP vs TS < 0.001		SP vs MT = 0.36			SP vs TS = 0.02		SP vs MT = 0.99
	SP vs TD = 0.99		TS vs MT = 0.001			SP vs TD = 0.99		TS vs MT = 0.07
	TS vs TD < 0.001		MT vs TD = 0.36			TS vs TD = 0.05		MT vs TD = 0.99
Inter-implant distance deviation
Mean (μm)	36.6	35.8	42.8	24.7	92.4	59.1	41.4	72.1	34.7	98.2	0.33	0.65	0.06	0.44	0.83
SD (μm)	25.0	21.9	28.2	22.4	79.4	66.3	32.7	36.0	33.5	33.1	0.33	0.65	0.06	0.44	0.83
p values	All groups < 0.001					All groups = 0.01
	NSP vs SP = 0.99		NSP vs TS = 0.99			NSP vs SP = 0.88		NSP vs TS = 0.96
	NSP vs MT = 0.96		NSP vs TD = 0.004			NSP vs MT = 0.70		NSP vs TD = 0.25
	SP vs TS = 0.99		SP vs MT = 0.97			SP vs TS = 0.49		SP vs MT = 0.99
	SP vs TD = 0.003		TS vs MT = 0.84			SP vs TD = 0.03		TS vs MT = 0.30
	TS vs TD = 0.001		MT vs TD = 0.001			TS vs TD = 0.65		MT vs TD = 0.01
Angle deviation
Mean (°)	0.5	0.3	0.3	0.3	0.3	0.8	0.4	0.3	0.4	0.4	0.003	0.23	0.95	0.07	0.14
SD (°)	0.2	0.2	0.1	0.1	0.1	0.2	0.2	0.1	0.1	0.1	0.003	0.23	0.95	0.07	0.14
p values	All groups = 0.02					All groups < 0.001
	NSP vs SP = 0.10		NSP vs TS = 0.02			NSP vs SP < 0.001		NSP vs TS < 0.001
	NSP vs MT = 0.03		NSP vs TD = 0.03			NSP vs MT < 0.001		NSP vs TD < 0.001
	SP vs TS = 0.53		SP vs MT = 0.73			SP vs TS = 0.04		SP vs MT = 0.76
	SP vs TD = 0.65		TS vs MT = 0.61			SP vs TD = 0.44		TS vs MT = 0.03
	TS vs TD = 0.77		MT vs TD = 0.83			TS vs TD = 0.08		MT vs TD = 0.60

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