Non-Precious Metal Alloy Double Crown-Retained Removable Partial Dentures: A Cross-Sectional In Vivo Investigation

Strasding, Malin; Abou‐Ayash, Samir; Laziok, Thomas; Doerken, Sam; Kohal, Ralf‐Joachim; Patzelt, Sebastian B. M.

doi:10.3390/ma15176137

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…As mentioned in previous studies, zirconia was also used for fabrication of telescopic crown systems either primary or secondary crown, or even both. 47 PEEK is a proper material for primary crowns, regardless of the taper and the material of the secondary crown. PEEK is a soft and ductile material that yields and adapts well.…”

Section: Discussionmentioning

confidence: 99%

Comparative Stress Analysis Study Of CAD/CAM Milled PEEK And Zirconia Primary Copings In Double Crown PEEK Framework Mandibular Partial Denture After 1 Year Simulated Function

Homossany

Mohamed

2023

Egyptian Dental Journal

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Aim of the study: The objective was to assess and compares the effect of PEEK and Zirconia primary copings in milled double crown PEEK framework. Materials and methods: One cast was fabricated simulating Kennedy Class I with the premolars as the last standing abutment. The primary copings were classified into two groups, milled PEEK group I and milled Zirconia group II. Two milled PEEK frameworks were used. Four strain gauges were installed bilaterally in the model. A load of 100 N was applied to the area of the first molar bilaterally. The same procedure was repeated 10 times. Cyclic loading was applied simulating 1 year of function. Strains induced on the abutments during bilateral loading were evaluated before and after chewing simulation. Results: The highest compressive micro-strain was recorded at channel (4) after cyclic loading for PEEK group 359.00±5.055 µm/m followed by channel (2) 356±13.293 µm/m. While the least compressive micro-strain was recorded at channel (1) before cyclic loading for the Zirconia was 150±7.817 µm/m. There was significant difference in channels ( 2) and (4) regarding PEEK group before and after cyclic loading. While for Zirconia group there was significance difference in channels ( 1) and (3) before and after cyclic loading where P value was<0.05. There was significant difference in all the channels before and after cyclic loading. Conclusion: PEEK and Zirconia primary copings showed different distribution of stress, as PEEK primary coping transmitted more stress to the supporting structures.

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Section: Discussionmentioning

confidence: 99%

Comparative Stress Analysis Study Of CAD/CAM Milled PEEK And Zirconia Primary Copings In Double Crown PEEK Framework Mandibular Partial Denture After 1 Year Simulated Function

Homossany

Mohamed

2023

Egyptian Dental Journal

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Cumulative 10-year performance of endodontically treated teeth with prosthetic restorations of base metal alloy double crowns with friction pins—a retrospective study

Hinz

Bömicke

Bensel³

2023

Clin Oral Invest

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Objectives This 120-month follow-up study aimed to investigate the complication rate of abutment teeth after endodontic pretreatment with base metal alloy double crowns with friction pins. Materials and methods A total of 158 participants (n = 71, 44.9% women) aged 62.5 ± 12.7 years with 182 prostheses on 520 abutment teeth (n = 459, 88.3% vital) were retrospectively analyzed between 2006 and 2022. Of the endodontically treated abutment teeth, 6.9% (n = 36) were additionally treated with post and core reconstructions. Cumulative complication rates were calculated using the Kaplan–Meier estimator and log-rank test. In addition, Cox regression analysis was performed. Results The cumulative complication rate at 120 months for the entire set of abutment teeth was 39.6% (confidence interval [CI]: 33.0–46.2). Endodontically treated abutment teeth (33.8%; CI: 19.6–48.0) were found to have a significantly higher cumulative fracture rate than vital teeth (19.9%; CI: 13.9–25.9, p < 0.001). Endodontically treated teeth restored with post and core reconstructions (30.4%; CI: 13.2–47.6) showed a nonsignificant lower cumulative fracture rate than that of teeth with root fillings only (41.6%; CI: 16.4–66.8, p = 0.463). Conclusions Higher 120-month cumulative fracture rates were observed in endodontically treated teeth. Comparable performance was observed in teeth with post and core reconstructions compared to teeth with root fillings only. Clinical relevance If endodontically treated teeth are used as abutments for double crowns, the risk of complications from these teeth should be considered when planning treatment and communicating with the patient.

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Success and complication rates of non-precious alloy telescopic crowns in a general dental practice

Wierichs,

Kramer,

Meyer-Lueckel

et al. 2023

Clin Oral Invest

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Objectives This retrospective, single-center, practice-based cohort study aimed to analyze factors associated with the success of removable partial dentures retained by telescopic crowns (TRPD). Materials and methods TRPD which were placed in a single practice of a practice-based research network were analyzed. Data from 139 patients (age (SD): 66 (11) years; 66 female) with 174 TRPD including 488 non-precious alloy telescopic crowns (TC) between 2004 and 2016 were included. TC without any technical complication were considered as successful, and as survived, if they were still in function at the last check-up. Multilevel Cox proportional hazard models were used to evaluate the association between clinical factors and time until failure. Results Within a mean follow-up period (SD) of 4.2 (3.3) years (min–max: 1 day–12 years), 372 (76%) TC (AFR5years,TC-level: 5.0%) as well as 136 (87%) TRPD (AFR5years,TRPD-level: 5.1%) (“worst-case scenario”) and 150 (86%) TRPD (AFR5years,TRPD-level: 3.4%) (“best-case scenario”) were considered as successful. The main failure types were recementation (n = 39), endodontic treatment (n = 36), and extraction (n = 35). TC in male patients showed 1.6 times higher risk for failure than in female patients (95%CI: 1.1–2.4; p = 0.023). TC on premolars showed 2.2 times higher risk for failure than on incisors (95%CI: 1.1–5.0; p = 0.023) and TC in dentures with ≤ 3TC showed 2.1 times higher risk for failure than TC in dentures with > 3TC (1.3–3.4; p = 0.042). Furthermore, TC on the most distal tooth in an arch showed 2.4 times higher risk for failure than TC on a more mesial tooth (1.5–3.8; p < 0.001). Conclusion For removable partial dentures retained by telescopic crowns, high success rates could be found after up to 12 years. Patient-level and tooth-level factors were significantly associated with failure. Clinical relevance For removable partial dentures retained by telescopic crowns, high success rates could be found after up to 12 years. Patient-level and tooth-level factors were significantly associated with failure.

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Non-Precious Metal Alloy Double Crown-Retained Removable Partial Dentures: A Cross-Sectional In Vivo Investigation

Cited by 5 publications

References 27 publications

Comparative Stress Analysis Study Of CAD/CAM Milled PEEK And Zirconia Primary Copings In Double Crown PEEK Framework Mandibular Partial Denture After 1 Year Simulated Function

Comparative Stress Analysis Study Of CAD/CAM Milled PEEK And Zirconia Primary Copings In Double Crown PEEK Framework Mandibular Partial Denture After 1 Year Simulated Function

Cumulative 10-year performance of endodontically treated teeth with prosthetic restorations of base metal alloy double crowns with friction pins—a retrospective study

Success and complication rates of non-precious alloy telescopic crowns in a general dental practice

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