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Purpose <p>To evaluate the prevalence of prosthetic-related technical complications (PRTC) for bimaxillary implant-supported fixed complete metal-resin prostheses (ISFP) with (Zrm-ISFP) or without (r-ISFP) occlusal support by incorporation of zirconium molars.</p> Materials and methods <p>Two cohorts of patients with bimaxillary ISFP subdivided into test group (TG; Zrm-ISFP) and control group (CG, r-ISFP) providing a 5-year follow-op program were retrospectively analyzed. For both groups the prevalence of PRTC was assessed and compared including evaluation of their occurrence in different time periods (-1&#xa0;year, &gt; 1–3-years; &gt; 3–5-years post-loading). Additionally, implant/prosthesis survival-rates, peri-implant-marginal bone loss (MBL) and implant-related-technical complications were evaluated and compared.</p> Results <p>For the 29 patients with bimaxillary ISFP subdivided into 14 TG [Zrm-ISFP] and 15 CG [r-ISFP]) and followed-up for 5&#xa0;years no implant and denture loss was seen (survival 100%). However, the prevalence of PRTC such as acrylic-tooth fracture (p &lt; 0.001) and acrylic-tooth repair (p = 0.015) differed significantly between TG (Zrm-ISFP) and CG (r-ISFP). For the CG, an evidently higher time-related ongoing increase (-1&#xa0;yr: n = 9; &gt; 1-3yrs: n = 23; &gt; 3-5yrs: n = 34) of the prevalence of PRTC was noted compared to TG ( -1&#xa0;yr: n = 2; &gt; 1-3yrs: n = 3; &gt; 3-5yrs: n = 7). In contrast, PRTC such as denture rebasing/reduction, denture cleaning, screw hole repair and implant-related technical complications and peri-implant MBL did not differ between TG and CG.</p> Conclusion/clinical relevance <p>The modified metal-resin ISFPs incorporating zirconium molars/quadrants used for bimaxillary ISFP reduce the prevalence of PRTC and combine beneficial effects such as cost effectiveness and reparability of metal-resin and occlusal stability and reduced wear of complete zirconium prostheses.</p>

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Clinical outcome and technical complications of bimaxillary full-arch implant-supported metal-resin fixed dental prostheses with or without ceramic molars: 5-year results

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月5日

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  • Stefan Krennmair,
  • Michael Weinländer,
  • Lukas Postl,
  • Michael Malek,
  • Thomas Forstner,
  • Helfried Hulla,
  • Gerald Krennmair

摘要

Purpose

To evaluate the prevalence of prosthetic-related technical complications (PRTC) for bimaxillary implant-supported fixed complete metal-resin prostheses (ISFP) with (Zrm-ISFP) or without (r-ISFP) occlusal support by incorporation of zirconium molars.

Materials and methods

Two cohorts of patients with bimaxillary ISFP subdivided into test group (TG; Zrm-ISFP) and control group (CG, r-ISFP) providing a 5-year follow-op program were retrospectively analyzed. For both groups the prevalence of PRTC was assessed and compared including evaluation of their occurrence in different time periods (-1 year, > 1–3-years; > 3–5-years post-loading). Additionally, implant/prosthesis survival-rates, peri-implant-marginal bone loss (MBL) and implant-related-technical complications were evaluated and compared.

Results

For the 29 patients with bimaxillary ISFP subdivided into 14 TG [Zrm-ISFP] and 15 CG [r-ISFP]) and followed-up for 5 years no implant and denture loss was seen (survival 100%). However, the prevalence of PRTC such as acrylic-tooth fracture (p < 0.001) and acrylic-tooth repair (p = 0.015) differed significantly between TG (Zrm-ISFP) and CG (r-ISFP). For the CG, an evidently higher time-related ongoing increase (-1 yr: n = 9; > 1-3yrs: n = 23; > 3-5yrs: n = 34) of the prevalence of PRTC was noted compared to TG ( -1 yr: n = 2; > 1-3yrs: n = 3; > 3-5yrs: n = 7). In contrast, PRTC such as denture rebasing/reduction, denture cleaning, screw hole repair and implant-related technical complications and peri-implant MBL did not differ between TG and CG.

Conclusion/clinical relevance

The modified metal-resin ISFPs incorporating zirconium molars/quadrants used for bimaxillary ISFP reduce the prevalence of PRTC and combine beneficial effects such as cost effectiveness and reparability of metal-resin and occlusal stability and reduced wear of complete zirconium prostheses.