Effect of Abutment Geometry and Luting Agents on the Vertical Marginal Discrepancy of Cast Copings on Implant Abutments: An In Vitro Study

Table 1

Vertical marginal discrepancy in μm for cast copings cemented or noncemented over different abutment geometries.

Abutment geometry	Luting agent	Mean	SD	Min	Max
Cylindrical 4.0 mm	Zinc oxide noneugenol	38.51	5.32	31.00	42.40	0.044
	Glass ionomer	33.08	5.38	25.22	42.40
	Zinc phosphate	47.81	6.75	40.80	54.83
	Noncemented	27.06	5.25	27.48	35.97
Cylindrical 5.5 mm	Zinc oxide noneugenol	38.30	6.55	29.20	44.80	0.020
	Glass ionomer	38.06	4.69	35.00	44.80
	Zinc phosphate	64.07	12.94	49.80	79.06
	Noncemented	29.89	5.39	28.95	38.12
Cylindrical 7.0 mm	Zinc oxide noneugenol	51.21	4.82	45.20	55.20	0.037
	Glass ionomer	48.06	7.16	40.04	55.22
	Zinc phosphate	58.73	20.18	42.80	85.66
	Noncemented	28.49	5.12	30.57	40.18
Hexagonal 4.0 mm	Zinc oxide noneugenol	42.98	8.15	31.80	50.00	0.030
	Glass ionomer	47.70	9.66	34.41	50.00
	Zinc phosphate	43.75	5.83	38.82	51.40
	Noncemented	29.12	5.67	29.16	40.62

SD: standard deviation. Student’s t test. Statistically significant differences .