Is a grooved collar implant design superior to a machined design regarding bone level alteration? An observational pilot study.

Bassetti, Renzo; Kaufmann, Regula; Ebinger, Andreas; Mericske, Regina; Enkling, Norbert (2014). Is a grooved collar implant design superior to a machined design regarding bone level alteration? An observational pilot study. Quintessence international, 45(3), pp. 221-229. Quintessenz Verlags-GmbH 10.3290/j.qi.a31208

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OBJECTIVE

This retrospective observational pilot study examined differences in peri-implant bone level changes (ΔIBL) between two similar implant types differing only in the surface texture of the neck. The hypothesis tested was that ΔIBL would be greater with machined-neck implants than with groovedneck implants.

METHOD AND MATERIALS

40 patients were enrolled; n = 20 implants with machined (group 1) and n = 20 implants with a rough, grooved neck (group 2), all placed in the posterior mandible. Radiographs were obtained after loading (at 3 to 9 months) and at 12 to 18 months after implant insertion. Case number calculation with respect to ΔIBL was conducted. Groups were compared using a Brunner-Langer model, the Mann-Whitney test, the Wilcoxon signed rank test, and linear model analysis.

RESULTS

After the 12- to 18-month observation period, mean ΔIBL was -1.11 ± 0.92 mm in group 1 and -1.25 ± 1.23 mm in group 2. ΔIBL depended significantly on time (P < .001), but not on group. In both groups, mean marginal ΔIBL was significantly less than -1.5 mm. Only insertion depth had a significant influence on the amount of periimplant bone loss (P = .013). Case number estimate testing for a difference between group 1 and 2 with a power of 90% revealed a sample size per group of 1,032 subjects.

CONCLUSION

ΔIBL values indicated that both implant designs fulfilled implant success criteria, and the modification of implant neck texture had no significant influence on ΔIBL.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > School of Dental Medicine > Department of Prosthodontics [discontinued]
UniBE Contributor:	Bassetti, Renzo, Kaufmann, Regula, Ebinger, Andreas, Mericske, Regina, Enkling, Norbert
Subjects:	600 Technology > 610 Medicine & health
ISSN:	0033-6572
Publisher:	Quintessenz Verlags-GmbH
Language:	English
Submitter:	Eveline Carmen Schuler
Date Deposited:	27 Jan 2015 16:52
Last Modified:	05 Dec 2022 14:39
Publisher DOI:	10.3290/j.qi.a31208
PubMed ID:	24570989
Uncontrolled Keywords:	implant collar, implant collar design, microgrooves
URI:	https://boris.unibe.ch/id/eprint/61737