A 5-year prospective clinical study of Neobiotech implants for partially edentulous patients

Wilmart Labriaga; Ju-Hee Hong; Jin-Hong Park; Sang-Wan Shin; Jeong-Yol Lee

doi:10.4047/jkap.2017.55.3.272

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Labriaga, Hong, Park, Shin, and Lee: A 5-year prospective clinical study of Neobiotech implants for partially edentulous patients

ORIGINAL ARTICLE

J Korean Acad Prosthodont 2017;55(3):272-278.

Published online: NaN July 2017

DOI: https://doi.org/10.4047/jkap.2017.55.3.272

A 5-year prospective clinical study of Neobiotech implants for partially edentulous patients

Wilmart Labriaga, Ju-Hee Hong, Jin-Hong Park, Sang-Wan Shin, Jeong-Yol Lee^∗

Institute for Clinical Dental Research, Korea University Medical Center, Korea University, Seoul, Republic of Korea

∗Corresponding Author: Jeong-Yol Lee Department of Prosthodontics, Institute for Clinical Dental Research, Korea University Medical Center, Korea University, 148 Gurodong-ro, Guro-gu, Seoul 08308, Republic of Korea +82 (0)2 2626 1922: e-mail, wddc@korea.ac.kr

Received 10 May 201725 May 2017 Accepted 8 June 2017

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

The aim of the present prospective clinical study was to assess the cumulative survival rate (CSR) of Neobiotech implants restored with fixed partial prosthesis in relation to its potential risk factors.

Materials and methods

Thirty six partially edentulous patients received Neobiotech implants and implant supported fixed partial prosthesis at Korea University Guro Hospital Dental Center from November 2009 until November 2011. The observation period was set from the implant placement and the last clinical visit until December 2015. Implant survival rate was determined using the Kaplan-Meier method. The relationship between implant survival rate and the potential risk factors were analysed using the multi Cox proportional analysis (P<.05).

Results

A total of 69 implants were placed in 36 patients after a mean observation period of 45.9 months. Two out of 69 implants failed before loading, yielding a 5-year cumulative survival rate of 97.1%. The maxillary implants have a lesser CSR than the mandibular implants based on log rank test analysis (maxilla=91.3%; mandible=100% P<.05). However, the multi Cox proportional analysis showed that implant location has no significant correlation with implant failure (P>.05).

Conclusion

Neobiotech implants showed predictable results with a 5 year cumulative survival rate of 97.1%. (J Korean Acad Prosthodont 2017;55:272-8)

Keywords: Dental implants, Survival rate, Risk factors, Maxilla

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Fig. 1.

Measurement of marginal bone level.

Fig. 2.

5-year cumulative survival rate (CSR) of Neobiotech implants by Kaplan-Meir method.

Fig. 3.

Mean marginal bone level from the reference point.

Table 1.

Distribution of i mplants and cumulative survival rate in re elation to investigated risk factors

Risk factors	Characteristics	Number of implant	CSR %	P value
Age	Younger (< 65)	47	95.7	.331
Age	Advanced (≥ 65)	22	100	.331
Gender	Male	26	92.3	.066
Gender	Female	43	100	.066
Systemic condition	Healthy	47	97.9	.588
Systemic condition	Chronic disease	22	95.5	.588
Width	Small	8	100	.552
	Regular	18	100
	Wide	43	95.3
Length	Short	11	100	.542
Length	Long	58	96.5	.542
Implant arch location	Maxilla	23	91.3	.047∗
Implant arch location	Mandible	46	100	.047∗
Tooth position	Ant	8	100	.602
Tooth position	Post	61	96.6	.602
Other Surgery	No	50	98.0	.441
Other Surgery	Yes	19	94.7	.441
Splinting	Splint	26	100	-
Splinting	Non-splint	41	100	-
Abutment	Ready made	32	100	-
Abutment	Customized	35	100	-

Systemic disease included diabetes mellitus and/or cardiovascular disease; Other surgery includes guided bone regeneration (GBR) and/or sinus augmentation; ∗significant difference (log-rank test, P < .05).

Table 2.

Multivariate associations with cumulative survival rate of implants

	B	P value	Exp (B)	Exp (B) 95.0% CI
	B	P value	Exp (B)	Lower	Upper
Implant arch location (Maxilla vs Mandible)	5.371	.427	215.110	.000	123185820.51
Gender (Male vs Female)	5.041	.423	154.601	.001	35065013.208

Only the risk factors that showed a statistically borderline significant in the log-rank test (P < .20) were included in the multivariate model.

The included risk factors showed no significant correlation with implant failure (P > .05).

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