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Title

Influence of different lubricants on the retentive force of LOCATOR(®) attachments - an in vitro pilot study
Authors
Srinivasan, Murali
Schimmel, Martin
Kobayashi, Mariko
Badoud-Georges, Isabelle
Ammann, Patrick
Herrmann, François
Muller, Frauke
Published in Clinical Oral Implants Research. 2016, vol. 27, p. 771-775
Abstract OBJECTIVE: The aim of this in vitro pilot study was to evaluate the influence of an artificial saliva (AS) lubricant on the retentive force of a stud-type attachment (LOCATOR(R) ) for implant overdentures (IODs). METHODS: Twenty custom-made models simulating a two-IOD with parallel implant situation were fabricated using LOCATOR(R) attachments. The in vitro testing was carried out with an Instron(R) universal testing machine for a total of 10,000 insertion-removal cycles, for each model, in two different aqueous test mediums (Group 1: 0.9% sodium chloride solution (NaCl), n = 10; Group 2: AS, n = 10). Changes in the mean retentive force (F) were plotted against the cycle numbers #10, #100, #1000, #5000, and #10,000. Mixed regression models were applied for statistical analyses. RESULTS: A mixed regression (not considering interactions) predicted, compared to cycle #10, higher retentive forces at cycles #100 (P < 0.0001), #1000 (P = 0.017), similar forces at #5000 (P = 0.277), and lower forces at #10,000 (P = 0.012); there was no overall effect of the medium (P = 0.159). A second statistical model, employing the interaction term "cycle##medium", confirmed similarly the effect. Although the interaction term was significant at cycle #100 (p = 0.045), there was no significant difference between the two groups (P = 0.140). CONCLUSION: In this in vitro pilot experiment, there was no difference in mean retentive forces of the LOCATOR(R) attachments when tested with either 0.9% NaCl or a Glandosane(R) -like artificial saliva lubricant. A larger scale study may still confirm the superiority of either lubricant for quasiclinical bench experiments.
Keywords LOCATOR® attachments — Artificial saliva — Dislodging cycles — In vitro testing — Overdentures — Retentive force retentive force
Identifiers
PMID: 26354041
Full text
Article (Published version) (510 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Faculté de médecine / Section de médecine clinique / Département de médecine
Faculté de médecine / Section de médecine clinique / Département de réadaptation et gériatrie
Faculté de médecine / Section de médecine dentaire / Département de réhabilitation oro-faciale / Division de gérodontologie et prothèse adjointe
Research groups Groupe de recherche Frauke Müller (797)
Etudes précliniques de l'ostéoporose (606)
Démence du sujet âgé, troubles cognitifs, la symptomatologie cognitive (577)
Citation
(ISO format) 		SRINIVASAN, Murali et al. Influence of different lubricants on the retentive force of LOCATOR(®) attachments - an in vitro pilot study. In: Clinical Oral Implants Research, 2016, vol. 27, p. 771-775. doi: 10.1111/clr.12680 https://archive-ouverte.unige.ch/unige:80781

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Deposited on : 2016-02-22

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