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ORIGINAL STUDY NON-COMPETITION
Year : 2018  |  Volume : 18  |  Issue : 5  |  Page : 29

OSNC1: Effect of direct retainer types of dent-maxillary prosthesis in maxillectomy patients: An In Vitro study


Date of Web Publication31-Oct-2018

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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-4052.244641

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How to cite this article:
. OSNC1: Effect of direct retainer types of dent-maxillary prosthesis in maxillectomy patients: An In Vitro study. J Indian Prosthodont Soc 2018;18, Suppl S1:29

How to cite this URL:
. OSNC1: Effect of direct retainer types of dent-maxillary prosthesis in maxillectomy patients: An In Vitro study. J Indian Prosthodont Soc [serial online] 2018 [cited 2018 Nov 20];18, Suppl S1:29. Available from: http://www.j-ips.org/text.asp?2018/18/5/29/244641



Fujita Haruka1, Otomaru Takafumi1, Takahashi Hidekazu2, Iwasaki Naohiko2, Sumita Yuka1

1Department of Maxillofacial Prosthetics, Graduated School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU) Tokyo Japan, 2Oral Biomaterials Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU) Tokyo Japan

Purpose: To investigate the effect of direct retainer types on the residual teeth of a dento-maxillary prosthesis in maxillectomy patients.

Materials and Methods: A simulated uni-lateral maxillectomy model and metal framework of Aramany Class I were fabricated. Strain gauges were put on the labial side of #11, the buccal side of #14, #15, #16, and #17. Firstly, stain values were measured while removing load from 1.0 N to 5.0 N were applied at the center of the framework at the condition of 0.9mm wired on #11. After direct retainer of #11 was changed to an O-ring attachment, stain values were measured. Finally, changed to a magnetic attachment, values were measured. We compared the changes of strain values on #11, #14, #15, #16 and #17 for each condition. The removing load was applied with a universal test machine, strain values were measured and analyzed with the data analysis software.

Results: The framework with a magnetic attachment was dislodged when loaded with 4.0 N, the others were not dislodged within 5.0 N. At any situations, strain values of #14 were the maximum among abutment teeth of premolars and molars. The strain values of #11 with magnetic attachment and O-ring attachment have increased compared with wire clasp. Additionally, the strain value of #14 was decreased, #17 was increased.

Conclusion: Within the limitation of this in vitro study, the first premolar would be most stressed under the dislodgement in case of metal framework of Aramany Class I.






 

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