The Journal of Advanced Prosthodontics

  • 제16권5호
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  • Pages.290-301
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  • 2024
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  • 2005-7806(pISSN)
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  • 2005-7814(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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Impact of type and position of abutment connection on microstrain distribution: an in vitro study

  • Jekita Siripru (Department of Conservative Dentistry and Prosthodontics, Srinakharinwirot University) ;
  • Usanee Puengpaiboon (Department of General Dentistry, Srinakharinwirot University) ;
  • Chamaiporn Sukjamsri (Department of Biomedical Engineering, Srinakharinwirot University) ;
  • Basel Mahardawi (Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Chulalongkorn University) ;
  • Napapa Aimjirakul (Department of Conservative Dentistry and Prosthodontics, Srinakharinwirot University)
  • 투고 : 2024.04.29
  • 심사 : 2024.09.09
  • 발행 : 2024.10.31
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초록

PURPOSE. The aim of this study was to investigate microstrains around two non-parallel implant-supported prostheses and different abutment connections and positions under vertical static load using strain gauges. MATERIALS AND METHODS. 4 models simulating the mandibular unilateral free-end were fabricated. 8 implants (4.0 × 10 mm and 5.0 × 10 mm) were inserted in the second premolar, perpendicular to the occlusal plane, and the second molar, tilted at 15°. Four groups were analyzed: engaging and angled abutments (control group), both non-engaging abutments, both screw-and cement-retained prosthesis (SCRP) abutments, and engaging and non-engaging abutments. Strain gauges were placed buccally, lingually, mesially, and distally adjacent to each implant. The restoration was cement-retained in the control group and screw and cement-retained in the rest. Zirconia bridges were fixed on the abutment with NX3, and a 300 N vertical static load was applied. Microstrains were recorded and analyzed. RESULTS. Both non-engaging abutments showed the highest compressive microstrains (-52.975), followed by engaging, angled abutment (-25.239). SCRP-SCRP abutments had the lowest compressive microstrains (-14.505), while the engaging, non-engaging abutments showed tensile microstrains (0.418). Microstrains in SCRP-SCRP and engaging, non-engaging groups were significantly lower than in the control group (α = .05). Premolar areas showed compressive microstrains (-47.06), while molar sites had tensile microstrains (+0.91), with microstrains in premolars being significantly higher than in molar area (α = .05). CONCLUSION. The types of abutment connections and positions may have a potential effect on microstrains at the implant-bone interface. SCRP-SCRP abutments could be an alternative to use in non-parallel implant-supported prostheses when two implants make an angle of no more than 20 degrees.

키워드

과제정보

This research was supported by the Faculty of Dentistry, Srinakharinwirot University: Grant numbers 363/2565.

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