Evaluation of Implant Collar Surfaces for Marginal Bone Loss: A Systematic Review and Meta-Analysis

Table 1

Characteristics of studies included ().

Author, year	Arch	Study design	Follow-up time	Patients ()	Patients’ age	Collar surface characterization	Implants system	Collar		Implants ()	MBL (mm)			Survival rate (%)
								Diameter (mm^2)	Length (mm)		<5 y	5–10 y	>10 y
den Hartog et al. 2013 [3]	Maxilla	RCT	1 year	93	37.2 ± 12.9	Machined	Noble Biocare	—	1.5	30	1.19 ± 0.82	—	—	96.8
					40.1 ± 14.4	Rough microthreaded	Noble Biocare	—	—	31	0.90 ± 0.57	—	—	100
					40.1 ± 17.2	Scalloped microthreaded	Noble Biocare	—	—	31	2.01 ± 0.74	—	—	100
Nickenig et al. 2013 [19]	Mandible	RCT	5 years	34	45.2	Machined	Noble Biocare	4.3	—	63	1.3	1.4	—	—
						Rough microthreaded	Noble Biocare	4	—	70	0.6	0.7	—	—
Sánchez-Siles et al. 2016 [20]	Maxilla; Mandible	Retrospective	>10 years	400	53.50	Machined	BIS Biotech	3.6/3.9/4.4	2.5	515	1.08 ± 1.27	1.12 ± 1.21	1.18 ± 1.39	—
						Rough	BIS Biotech	3.6/3.9/4.4	—	729	2.63 ± 1.61	2.39 ± 1.59	2.41 ± 1.35	—
Piao et al. 2009 [21]	Maxilla; Mandible	Prospective	1 year	54	57.6	Machined	Restore	—	3	45	1.38 ± 0.71	—	—	100
						Rough	Branemark	—	—	45	1.24 ± 0.36	—	—	100
						Rough microthreaded	Hexplant	—	—	45	0.78 ± 0.49	—	—	100
Peñarrocha-Diago et al. 2013 [22]	Maxilla; Mandible	Prospective	1 year	18	56.9	Machined	Osseous	3.75/4.25	—	69	0.38 ± 0.51	—	—	98.6
						Rough microthreaded	Inhex	3.75/4.25	—	72	0.12 ± 0.17	—	—	98.6
Karlsson et al. 1998 [23]	Maxilla; Mandible	Prospective	2 years	50	53	Machined	Astra Tech	3.5/4	—	36	0.26 ± 0.81	—	—	95.3
						Rough	Astra Tech	3.5/4	—	36	0.22 ± 0.55	—	—	100
Van de Velde et al. 2010 [24]	Mandible	Prospective	1 year	39	58.4	Machined	Branemark	—	—	70	1.52 ± 0.64	—	—	98.6
						Rough	Astra Tech	—	—	75	0.80 ± 0.98	—	—	100
						Rough microthreaded	Astra Tech	—	—	50	0.81 ± 1.11	—	—	100
Bratu et al. 2009 [25]	Mandible	Prospective	1 year	46	23–65	Machined	MIS-Implants	3.75/4.25	—	46	1.47 ± 0.4	—	—	100
						Rough microthreaded	MIS-Implants	3.75/4.25	—	46	0.69 ± 0.25	—	—	100
Goswami 2009 [26]	Mandible	Prospective	1 year	20	25–50	Machined	Oraltronics	—	2	20	1.53 ± 0.28	—	—	—
						Rough	Nobel Biocare	—	—	20	1.41 ± 0.35	—	—	—
Shin et al. 2006 [16]	Maxilla; Mandible	Prospective	1 year	68	48	Machined	Ankylos	—	—	35	1.32 ± 0.27	—	—	100
						Rough	Lifecore	—	—	34	0.76 ± 0.21	—	—	100
						Rough microthreaded	Oneplant	—	—	38	0.18 ± 0.16	—	—	100
Lee et al. 2007 [27]	Maxilla; Mandible	Prospective	3 years	17	53.3	Rough microthreaded	Astra Tech	3.5/4	—	17	0.24 ± 0.13	—	—	100
						Rough	Astra Tech	3.5/4	—	17	0.51 ± 0.33	—	—	100
Puchades-Roman et al. 2000 [28]	Maxilla; Mandible	Retrospective	>2 years	30	41.9	Machined	Astra Tech	—	—	15	1.65 ± (0.26)	—	—	—
					37.3	Rough	Branemark	—	—	15	0.57 ± (0.28)	—	—	—