Cumulative Success Rate of Short and Ultrashort Implants Supporting Single Crowns in the Posterior Maxilla: A 3-Year Retrospective Study

Table 2

Bivariate analysis of the success rate according to study included covariates.

Variable	Overall		value
	Success	Failure
	(%)	(%)
Implant length
Short	96 (97.96)	2 (2.04)	0.33
Ultrashort	39 (95.12)	2 (4.88)
Implanted tooth type
Premolar	65 (97.01)	2 (2.99)	1.00
Molar	70 (97.22)	2 (2.78)
Implant surface
Integra-CP	113 (96.58)	4 (3.42)	1.00
Hydroxyapatite (HA) coating	12 (100)	0 (0.00)
Integra-Ti	5 (100)	0 (0.00)
Restorative material
Ceromer	31 (93.94)	2 (6.06)	0.23
Ceramic	104 (98.11)	2 (1.89)
Crown-to-implant ratio
<2 Units	71 (98.61)	1 (1.39)	0.60
>2 Units	63 (96.92)	2 (3.08)
Periodontal status before implantation
Periodontally compromised	36 (94.74)	2 (5.26)	1.00
Nonperiodontally compromised	25 (92.59)	2 (7.41)