Logistic Regression Analysis of the Factors Involved in the Failure of Osseointegration and Survival of Dental Implants with an Internal Connection and Machined Collar: A 6-Year Retrospective Cohort Study

Table 2

Descriptive analysis of the failure of survival (after loading) in order to the analyzed independent variables and survival analysis applying the Kaplan-Meier model.

		Survival
		Total		Yes		No		Kaplan-Meier
		Count	Column; (, %)	Count	Column; (, %)	Count	Column; (, %)	Sig.
Sex	Total	290	100.0%	282	100.0%	8	100.0%
	Male	139	47.9%	132	46.8%	7	87.5%
	Female	151	52.1%	150	53.2%	1	12.5%
Dental arch	Total	290	100.0%	282	100.0%	8	100.0%	0.282
	Upper	157	54.1%	154	54.6%	3	37.5%
	Lower	133	45.9%	128	45.4%	5	62.5%
Implant position in the dental arch	Total	290	100.0%	282	100.0%	8	100.0%	0.373
	Incisive	38	13.1%	35	12.4%	3	37.5%
	Canine	32	11.1%	32	11.3%	0	0.0%
	Premolar	100	34.4%	98	34.7%	2	25
	Molar	120	41.4%	117	41.6%	3	37.5
Implant length	Total	290	100.0%	282	100.0%	8	100.0%	0.870
	6.0	12	4.2%	12	4.3%	0	0.0%
	8.0	104	35.8%	100	35.5%	4	50%
	10.0	118	40.6%	116	41.1%	2	25%
	12.0	56	19.4%	54	19.1%	2	25%
Implant diameter	Total	290	100.0%	282	100.0%	8	100.0%	0.830
	3.5	95	32.7%	90	31.9%	5	62.5%
	4.0	142	49.0%	142	50.4%	0	0.0%
	4.5	53	18.3%	50	17.7%	3	37.5%
Smooth polished neck height	Total	290	100.0%	282	100.0%	8	100.0%	0.582
	0.7 mm	169	58.2%	163	57.8%	6	75%
	1.5 mm	121	41.8%	119	42.2%	2	25%
Surgical technique	Total	290	100.0%	282	100.0%	8	100.0%	0.272
	Conventional drilling mature bone	214	73.8%	210	74.1%	4	50%
	Postdental exodontia	34	11.7%	33	11.6%	3	37.5%
	Atraumatic sinus lift	17	5.9%	17	6.0%	0	0.0%
	Simultaneous bone regeneration	20	6.9%	19	6.6%	1	12.5%
	Located in previously regenerated bone	5	1.7%	5	1.7%	0	0.0%
Surgical phases	Total	290	100.0%	282	100.0%	8	100.0%	0.563
	One phase	168	57.9%	165	58.5%	3	37.5%
	Two phases	122	42.1	117	41.5%	5	62.5%
Smoker	Total	290	100.0%	282	100.0%	8	100.0%
	No	227	78.3%	222	78.7%	5	62.5%
	<10 cig/day	35	12.1%	34	12.0%	1	12.5%
	>10 cig/day	28	9.6%	26	9.3%	2	25%
Previous medical conditions	Total	290	100.0%	282	100.0%	8	100.0%	0.093
	No	200	69.00	197	69.8%	3	37.5%
	Yes	90	31.0%	85	30.2%	5	62.5%
Anticoagulant drugs	Total	290	100.0%	282	100.0%	8	100.0%
	No	246	84.8%	243	86.2%	3	37.5%
	Yes	44	15.2%	39	13.8%	5	62.5%
Arterial hypertension	Total	290	100.0%	282	100.0%	8	100.0%	0.268
	No	265	91.4%	257	91.1%	8	100.0%
	Yes	25	8.6%	25	8.9%	0	0.0%
Diabetes	Total	290	100.0%	282	100.0%	8	100.0%	0.799
	No	280	96.5%	272	96.4%	8	100.0%
	Yes	10	3.5%	10	3.6%	0	14.3%
Psychoactive drugs	Total	290	100.0%	290	100.0%	8	100.0%	0.231
	No	265	91.4%	257	91.1%	8	100.0%
	Yes	25	8.6%	25	8.9%	0	0.0%
Bisphosphonate drugs	Total	290	100.0%	282	100.0%	8	100.0%	0.600
	No	284	97.9%	276	97.9%	8	100.0%
	Yes	6	2.1%	6	2.1%	0	0.0%
Prosthesis retention system	Total	240	100.0%	235	100.0%	5	100.0%	0.492
	Cemented	66	27.5%	64	27.2%	2	40.0%
	Screwed	174	72.5%	171	72.8%	3	60.0%
Type of prosthesis	Total	290	100.0%	282	100.0%	8	100.0%	0.472
	Single crown	84	29.0%	84	29.8%	0	0.0%
	Fixed partial prosthesis (FPP)	155	53.4%	150	53.2%	5	62.5%
	Overdenture	51	17.6%	48	17.0%	3	37.5%

Statistically significant findings.