Abstract:
OBJECTIVE:The objective of this in vitro study was to investigate fracture load, fracture types, and impact of chewing simulation of human molars restored with 3D printed indirect polyetheretherketone (PEEK) inlays and compare these with milled indirect PEEK inlays, direct resin composite fillings, and sound teeth. MATERIALS AND METHODS:A total of 112 molars with form congruent class I cavities were restored with (n = 16/group) 3D printed indirect PEEK inlays via fused layer manufacturing (FLM): (1) Essentium PEEK (ESS), (2) KetaSpire PEEK MS-NT1 (KET), (3) VESTAKEEP i4 G (VES), (4) VICTREX PEEK 450G (VIC), (5) milled indirect PEEK inlays JUVORA Dental Disc 2 (JUV), and (6) direct resin composite fillings out of Tetric EvoCeram (TET). Sound teeth (7) acted as positive control group. Half of the specimens of each group (n = 8) were treated in a chewing simulator combined with thermal cycling (1.2 million × 50 N; 12,000 × 5 °C/55 °C). Fracture load and fracture types of all molars were determined. Statistical analyses using Kolmogorov-Smirnov test and two-way ANOVA with partial eta squared (ηp2) followed by Scheffé post hoc test, chi square test and Weibull modulus m with 95% confidence interval were computed (p < 0.05). RESULTS:ESS and TET demonstrated the lowest fracture load with a minimum of 956 N, whereas sound molars showed the highest values of up to 2981 N. Chewing simulation indicated no impact (p = 0.132). With regard to Weibull modulus, KET presented a lower value after chewing simulation than JUV, whereas TET had the highest value without chewing simulation. All indirect restorations revealed a tooth fracture (75-100%), direct resin composite fillings showed a restoration fracture (87.5%), and 50% of the sound teeth fractured completely or had cusp fractures. CONCLUSIONS:All 3D printed and milled indirect PEEK inlays as well as the direct resin composite fillings presented a higher fracture load than the expected physiological and maximum chewing forces. CLINICAL RELEVANCE:3D printing of inlays out of PEEK via FLM provided promising results in mechanics, but improvements in terms of precision and esthetics will be required to be practicable in vivo to represent an alternative dental material.
journal_name
Clin Oral Investigjournal_title
Clinical oral investigationsauthors
Prechtel A,Stawarczyk B,Hickel R,Edelhoff D,Reymus Mdoi
10.1007/s00784-020-03216-5subject
Has Abstractpub_date
2020-10-01 00:00:00pages
3457-3466issue
10eissn
1432-6981issn
1436-3771pii
10.1007/s00784-020-03216-5journal_volume
24pub_type
杂志文章abstract:OBJECTIVES:Bioactive proteins are sequestered in human dentine and play a decisive role in dental pulp regeneration and repair. They can be released and exposed on the dentine surface by acids, but also chelators, such as ethylenediaminetetraacetic acid (EDTA). The objectives of this study were (i) to evaluate whether ...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-016-1824-1
更新日期:2017-04-01 00:00:00
abstract:OBJECTIVES:The purpose of this study is to compare pressures at the apical foramen created by conventional syringe irrigation and the GentleWave™ System, which releases high-velocity degassed irrigants to the pulp chamber and uses broad-spectrum sound energy for cleaning. MATERIALS AND METHODS:The apical pressure gene...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-015-1632-z
更新日期:2016-09-01 00:00:00
abstract::The aim of this study was to evaluate the clinical long-term performance of a visible light-cured resin (VLCR) denture base material and to compare it to a well-established polymethylmethacrylate (PMMA)-based denture acrylic in a randomized split-mouth clinical long-term study. One hundred removable partial dentures i...
journal_title:Clinical oral investigations
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00784-011-0572-5
更新日期:2012-06-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-020-03403-4
更新日期:2020-06-24 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-019-02843-x
更新日期:2019-11-01 00:00:00
abstract:BACKGROUND:Our aim was to investigate the disease-free survival in patients with tongue squamous cell carcinoma receiving metronomic neoadjuvant chemotherapy with 5-fluorouracil prodrugs (UFT or S-1) plus bleomycin compared with those who had up-front surgery retrospectively. METHODS:In this retrospective study, 108 p...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-018-2689-2
更新日期:2019-06-01 00:00:00
abstract:OBJECTIVE:Dental materials and oral hygiene products may be responsible for oral contact allergic reactions. We aimed to determine the occurrence of allergies in patients with symptomatic oral lichen planus (OLP), oral lichenoid lesions (OLLs) and stomatitis and investigate if patch testing could identify contact aller...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-017-2053-y
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVES:The corona disease (COVID-19) is developing into one of the greatest challenges for healthcare professionals around the world. In this article, we report the detailed actions taken in the Department of Conservative Dentistry and Periodontology, University Hospital, Ludwig-Maximilians-University (LMU), Munich...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-020-03440-z
更新日期:2020-08-01 00:00:00
abstract::The aim of this study was to compare the short-term performance of a session of single photodynamic therapy (PDT) and of a conventional ultrasonic debridement (UST) in persistent pockets of maintenance patients. In a prospective, randomized, controlled, single-blind clinical study, patients with chronic periodontitis ...
journal_title:Clinical oral investigations
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00784-009-0347-4
更新日期:2010-12-01 00:00:00
abstract::Denture-related stomatitis (DRS) is still a dilemma in removable prosthodontics. The aim of this study was to investigate the relationship of DRS with the presence of Candida albicans hyphae and Lactobacillus. A total of 91 patients wearing maxillary and mandibular complete dentures were included in the present study ...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-008-0240-6
更新日期:2009-12-01 00:00:00
abstract::The aim was to determine the relationship between mercury content of resting and stimulated saliva, and blood and urine. Eighty subjects participated; 40 of them attributed their self-reported complaints to dental amalgam (patients), the others were matched with respect to age, sex and amalgam restorations (controls)....
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s007840000089
更新日期:2000-12-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00784-014-1210-9
更新日期:2014-12-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-012-0817-y
更新日期:2013-06-01 00:00:00
abstract:INTRODUCTION:To compare, by Micro-CT and confocal laser scanning microscopy (CLSM), the ability of the Wave One Gold and Wave One systems to remove filling material from mesial canals of mandibular molars, effective time spent; quantity of extruded material, and percentage of sealer in the dentinal tubules after retrea...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-018-2441-y
更新日期:2019-01-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00784-016-1959-0
更新日期:2017-06-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章,随机对照试验
doi:10.1007/s00784-020-03536-6
更新日期:2021-02-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-020-03601-0
更新日期:2020-10-23 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-007-0173-5
更新日期:2008-09-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章,评审
doi:10.1007/s00784-018-2727-0
更新日期:2019-07-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-019-02853-9
更新日期:2019-11-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-004-0255-6
更新日期:2004-06-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-016-1901-5
更新日期:2017-05-01 00:00:00
abstract::Aim of this investigation was to evaluate the validity and reproducibility of the universal visual scoring systems (UniViSS) on occlusal surfaces in vitro. The validity study included 65 third molars. Following to reach a UniViSS consensus diagnosis for each surface, all teeth were histologically prepared and evaluate...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-010-0390-1
更新日期:2011-04-01 00:00:00
abstract:OBJECTIVE:Azithromycin is a macrolide antibiotic that appears to have both antibacterial and anti-inflammatory properties. This study aimed to investigate the effect of azithromycin on the production of pro-inflammatory cytokines and chemokines by human gingival fibroblasts (HGF) in vitro. MATERIALS AND METHODS:The ef...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-014-1249-7
更新日期:2015-03-01 00:00:00
abstract::The aim of the study was to investigate the temperature rise of a nanocomposite and a conventional hybrid dental composite during photopolymerization when cured with halogen curing lamp (QHT) and light-emitting diode (LED). Temperature rise during photopolymerization of two commercially available composites (Filtek Su...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-008-0236-2
更新日期:2009-09-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-015-1487-3
更新日期:2016-01-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-019-03024-6
更新日期:2020-01-01 00:00:00
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journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-016-1994-x
更新日期:2017-07-01 00:00:00
abstract:OBJECTIVES:The objective of this study was to evaluate the bond strength of three root-end filling materials (MTAA-MTA Angelus, MTAS-experimental MTA Sealer, and ZOE- zinc oxide and eugenol cement) in retrograde preparations performed with different ultrasonic tips (CVD, Trinity, and Satelec). MATERIALS AND METHOD:Nin...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-015-1708-9
更新日期:2016-11-01 00:00:00
abstract::Squamous cell carcinoma (SCC) of the oral cavity is an extremely invasive tumour of stratified squamous epithelium that spreads throughout degradation of the basement membrane (BM) and extra-cellular matrix. Oral verrucous carcinoma (VC) is a rare low-grade variant of oral SCC that penetrates into the subepithelial co...
journal_title:Clinical oral investigations
pub_type: 杂志文章
doi:10.1007/s00784-009-0296-y
更新日期:2010-06-01 00:00:00