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Retrieval of Cemented Monolithic Zirconia Single unit Implant Restoration Using Er:YSGG Laser: A Novel Non Sectionalized Separation Technique

Shah, Karnik
http://orcid.org/0000-0001-8942-1837
http://rave.ohiolink.edu/etdc/view?acc_num=osu1469211037

Abstract Details

2016, Master of Science, Ohio State University, Dentistry.
Introduction: The purpose of this study was to measure the force required to remove individual CAD/CAM monolithic 1.5mm thick zirconia copings cemented with a definitive or a provisional cement on zirconia and titanium stock implant abutments after single application of erbium-doped yttrium scandium gallium garnet (Er:YSGG) laser; comparing them to non-lased controls. Further, the temperature changes were assessed during laser application on cemented crowns, through thermocouples attached at the collars of 2 implants embedded in a stereolithographic model of the mandible. Materials and Methods: Resin- modified Glass ionomer (Rx; RelyX Luting Plus) and zinc oxide eugenol (Tb; TempBond) were used to cement a total of thirty-six monolithic zirconia (Zr; Zenostar® Zr Translucent) copings on new stock zirconia (Zr; ZirDesign™) and titanium (Ti; TiDesign™) abutments in this study. These abutment-coping specimens were randomly divided into 12 groups of 3 each, based on laser application (or control; C), abutment type, cement used, and storage conditions (D; 24 hour dry vs. W; 7 day water storage). Er:YSGG laser was applied at 6W, 30% water-60% air and 20 Hz (300mJ/pulse energy), post cementationfollowing a defined pattern. Force required to remove all the cemented copings from their abutments was measured on a universal testing machine (Instron Corp model 4204). Descriptive statistics, multi- factor analysis of variance (ANOVA) and Post Hoc Tukey’s HSD tests (a = .05) were performed. The temperature readings were recorded during laser application on a separate set of cemented crowns, with a four channel data logger thermometer (OMEGA Engineering Inc model HH309A). Results: The peak force values at dislodgement recorded for all the zirconia copings ranged from 11 – 471 N. The mean peak force values at removal of the Zr abutment groups were 470.3 ± 151.33 N (ZrRxC), 161.7 ± 19.29 N (ZrRxD), 316.03 ± 95.24 N (ZrRxW), 103.27 ± 24.53 N (ZrTbC), 39.33 ± 6.21 N (ZrTbD), 20.33 ± 6.45 N (ZrTbW) and Ti abutment groups were 349.80 ± 106.82 N (TiRxC), 84.63 ± 14.02 N (TiRxD), 177 ± 62.57 N (TiRxW), 54.77 ± 9.10 N (TiTbC), 22.67 ± 4.32 N (TiTbD) and 11.57 ± 2.30 N (TiTbW). Rx cemented copings debonded with lower removal force, after the use of Er:YSGG laser, compared to their controls (p < 0.001). For Tb cemented copings however, laser use did not result in significantly different (p =0.4307) force values.. The forces required to remove the copings were not significant for the provisional cement for each abutment type (p= 0.8440). For the temperature studies, all the samples showed a similar trend on the time-temperature graph, with temperatures both above and below the start temperature. Nevertheless, the maximum temperature rise seen for Zr and Ti abutments was 2.6 ºC and 3.9 ºC respectively. Conclusion: Within the limitations of this study, the following conclusions were drawn: 1) Lased RelyX Luting plus cemented zirconia copings de-bonded with lower removal force (p< 0.001) compared to their controls. This was not true to Tempbond cemented copings (p= 0.4307). 2) Within the lased specimens, no significant difference was seen between dry and water stored samples for each abutment group, with either cement. 3) The removal forces were not significantly different between the Zr and Ti abutment groups for all experimental settings. 4) For the temperature testing protocol, all the specimens followed a similar graphical trend. A constant temperature rise was not observed, the maximum temperature rise amongst the Zr and Ti specimens was recorded as 2.6°C and 3.9°C respectively.
Edwin McGlumphy, Jr. (Advisor)
Damian Lee (Committee Member)
Robert Seghi (Committee Member)
Dogyoon Kim (Committee Member)
47 p.
Dental Care; Dentistry
Implants, Zirconia, Abutment, Cement, Crown, Coping, Laser, Force, Retrieval, Temperature

Recommended Citations

Citations

  • Shah, K. (2016). Retrieval of Cemented Monolithic Zirconia Single unit Implant Restoration Using Er:YSGG Laser: A Novel Non Sectionalized Separation Technique [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469211037

    APA Style (7th edition)

  • Shah, Karnik. Retrieval of Cemented Monolithic Zirconia Single unit Implant Restoration Using Er:YSGG Laser: A Novel Non Sectionalized Separation Technique. 2016. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1469211037.

    MLA Style (8th edition)

  • Shah, Karnik. "Retrieval of Cemented Monolithic Zirconia Single unit Implant Restoration Using Er:YSGG Laser: A Novel Non Sectionalized Separation Technique." Master's thesis, Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469211037

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.