Archives

VOLUME 2 NO. 3 , 2018

OTHER ONLINE ARTICLES

Effects of a shade-matching light and background color on reliability in tooth shade selection
Siamak Najafi-Abrandabadi / Farhad Vahidi / Malvin N. Janal

Effects of a shade-matching light and background color on reliability in tooth shade selection

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Objective: Thepurpose of this study was to evaluate the effects of a shade-matching light(Rite-Lite-2, AdDent) and different viewing backgrounds on reliability in atest of shade tab matching. Materials and methods: Fourmembers of the Prosthodontic faculty matched 10 shade tabs selected for a rangeof shades against the shade guide. All raters were tested for color blindnessand were calibrated prior to the study. Matching took place under fourcombinations of conditions: with operatory light or the shade-matching light,and using either a pink or a blue background. Reliability was quantified withthe kappa statistic, separately for agreement of value, hue, and chromafor each shade tab. Results: In general,raters showed fair to moderate levels of agreement when judging the value ofthe shade tabs, but could not agree on the hue and chroma of thestimuli. The pink background led to higher levels of agreement than the bluebackground, and the shade-matching light improved agreement when used in conjunctionwith the pink but not the blue background. Conclusions: Moderatelevels of agreement were found in matching shade tab value. Agreementwas generally better when using the pink rather than the blue background,regardless of light source. The use of the shade-matching light tended toamplify the advantage of the pink background.



Postendodontic Restoration: Endodontic Post-and-Core or No Post At All?
Michael Naumann / Marc Schmitter / Gabriel Krastl

Postendodontic Restoration: Endodontic Post-and-Core or No Post At All?

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Purpose: The objectiveof this systematic review was to assess the impact of endodontic post insertionon the clinical performance of endodontically treated teeth (ETT). Materialsand Methods: A specific PICO question was developed and a Medlinesearch was performed in January 2017 using relevant terms in order to identifystudies comparing the success/survival of dental restorations using endodonticposts or no posts. Additionally, the electronic databases “Opengrey”, “BBO”,“LILAC” and “IBECS” were assessed and a hand search of cross references fromoriginal articles and reviews was performed. The methodological quality of theincluded studies was assessed independently by three referees using (1) thecritical appraisal skills program (CASP) and (2) Cochrane checklist (version5.1.0). Results: A total of 14 studies wereincluded, among them 11 randomized controlled trials (RCT), two prospectiveclinical trials, and one retrospective clinical trial. The overall quality ofthe studies was good according to the CASP. However, the Cochrane rating showedthat in seven studies, the risk of bias was high in > 40% of the items,indicating a relevant level of methodological flaws. Three studies showed a lowrisk of bias in > 80% of the items. The majority (10 out of 14) of theclinical studies included failed to show a positive effect of post placement. Apost effect is possible when no cavity wall is present. Conclusion:There is no unequivocal clinical evidence to support or reject theuse of posts even for no-wall cavities, either for direct or indirectrestorations.

Keywords: post,dowel, screw, core, post-retained, no-post, post-free, endocrown, buildup,post-and-core.



ONLINE FIRST

Peri-Implant Mucosal Creeping: Two Case Reports
Carlos Parra / Diego Capri

Peri-Implant Mucosal Creeping: Two Case Reports

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Whilecreeping attachment in natural teeth has been reported in the literature fordecades, the same phenomenon around dental implants is a new concept. Thisarticle describes two implant cases treated with free gingival autograft withfollowup at 18 and 30 months. Progressive coronal creeping of the mucosalmargin was observed covering the implant and abutment surfaces postoperatively.This report demonstrates that mucosal creeping around implants may occur afterperi-implant plastic surgical procedures, further improving the final outcomesof therapy.