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OTHER ONLINE ARTICLES


ESTHETIC DENTISTRY

  • Combined endo-restorative treatment of a traumatized central incisor: A five-year follow-up

    Combined endo-restorative treatment of a traumatized central incisor: A five-year follow-up

    Teeth with altered size and shape, incisal wear, andinadequate position affect the smile and dentofacial harmony. The aim of thisarticle was to describe a simple and safe protocol for an additive techniquewith composite resin and cosmetic enameloplasty to improve a patientssmile. A 24-year-old man complained about the appearance of his smile regardingcolor, shape, and position of the maxillary anterior teeth. Relevant dentalhistory included previous orthodontic treatment with inadequate completion. Theclinical examination revealed a disharmony of the smile caused by size andshape alterations of the incisors, a white spot on the right central incisor,incisal wear of the canines, and uneven incisal edges between the maxillaryanterior teeth. Treatment with direct composite restoration and enameloplastywas performed in line with the current conservative approach in dentistry. Thepatient was recalled for 54 months. The use of appropriate techniques inenameloplasty allowed the desired outcome to be observed over the 54 months offollow-up. With this method, it is possible to perform future repair and/ormodification, and it may increase the longevity of the restoration. Estheticand functional results were achieved by careful planning and execution as wellas periodic recalls. This conservative approach is a useful alternative toconventional restorations, reducing invasive treatments, chairside time, andcosts.

    Key words: composite resin, dental restoration failure,dental restoration repair, esthetics, longevity
    Juan Carlos Pontons-Melo / Isadora Martini Garcia / Marcos Vargas / Fabrício Mezzomo Collares

ENDODONTICS

  • Effect of Ferrule Thickness on Fracture Resistance of Endodontically Treated Incisors Restored with Fiber Post and Metal Crown

    Effect of Ferrule Thickness on Fracture Resistance of Endodontically Treated Incisors Restored with Fiber Post and Metal Crown

    Purpose: To assess the influence of ferrule thicknesson the fracture resistance and failure mode of endodontically treated bovineincisors and to predict the long-term prognosis, as well as choose the mostsuitable clinical treatment, for teeth with different ferrule thicknesses. Materialsand Methods: A total of 50endodontically treated bovine incisors were restored with quartz fiber postsand metal crowns and separated into five groups (n = 10 each): no ferrule(group A); 0.5-mm–thick ferrule (group B); 1.0-mm–thick ferrule (group C);1.5-mm–thick ferrule (group D); and 2.0-mm–thick ferrule (group E). Allspecimens were subjected to a fatigue loading test (2.33 Hz, 50 N, 300,000cycles). Survived specimens were loaded until fracture on a universal testingmachine at an angle of 135 degrees and a crosshead speed of 0.5 mm/minute.Failure modes and fracture resistance were recorded. Data were analyzed usingone-way ANOVA and least significant difference tests. Results: A significant increase (P< .05) was detected in fracture resistance with increase inferrule thickness. Group D (1.5 mm) and group E (2.0 mm) showed significantlyhigher fracture resistance than the other three groups. All failures belongedto restorable fracture patterns. Conclusion: Ferrule thickness contributed significantlyto the fracture resistance of endodontically treated bovine incisors restoredwith quartz fiber posts and metal crowns. Teeth with ferrule thickness of = 1.5mm can achieve higher fracture resistance and have a better long-termprognosis.


    Wenjia Xie / Shuying Yang / Qing Hai / Jian Wang

PEDIATRIC DENTISTRY

  • The effect of television distraction versus Tell-Show-Do as behavioral management techniques in children undergoing dental treatments

    The effect of television distraction versus Tell-Show-Do as behavioral management techniques in children undergoing dental treatments

    Objective:Distractionis a highly acceptable technique for diverting a patient’s attention from whatmay be perceived as an unpleasant procedure, reducing anxiety and helping thepatient relax. The objective of the present study was to evaluate the effect ofwatching television during dental treatment on pediatric patients’ anxiety andcooperation compared to the commonly used conventional Tell-Show-Do (TSD)behavioral management method. Method and materials: Sixty-nine children (mean age 6.8 years) scheduled to undergorestorative dental treatment were randomly divided into two interventiongroups: a group that was managed by television distraction and a control groupthat was managed by TSD. During treatment, anxiety was assessed by the FacialImage Scale and cooperative behavior was assessed by the Frankl scale. Pulserate and oxygen saturation were also measured during the treatment. Results: Compared to TSD, televisiondistraction significantly reduced anxiety by 1.27 (95% confidence interval [CI]0.798 to 1.744, adjusted P < .001), decreased pulse rate by 6.44 beats per minute(bpm) (95% CI 4.60 to 8.28, adjusted P < .001), and significantly increased cooperation by 1.17(95% CI -1.318 to -1.020, adjusted P < .001). A greater effect of television distraction on reducedanxiety and increased cooperation was observed during administration of theanesthetic injection. No effect of television distraction on saturation levelswas noted. Conclusions:Televisiondistraction is an effective method for reducing anxiety and improvingcooperative behavior in children during dental treatments.

    Key words: anxiety, behavior management, children,cooperation, dental treatment, television distraction
    Johnny Kharouba / Benjamin Peretz / Sigalit Blumer

PERIODONTICS

  • Effect of Cigarette Smoking on Morphologic Characteristics of Two Different Platelet-Rich Fibrin Membranes: A Scanning Electron Microscopic Study

    Effect of Cigarette Smoking on Morphologic Characteristics of Two Different Platelet-Rich Fibrin Membranes: A Scanning Electron Microscopic Study

    Purpose: Plateletconcentrates are used for regenerative periodontal and implant therapy. Up tonow, no study has reported the influence of smoking on platelet-rich fibrinmembranes. Hence, this crosssectional in vitro study aimed to analyze theinfluence of cigarette smoking on platelet morphology and fiber characteristicsof both leukocyte- and platelet-rich fibrin and advanced platelet-rich fibrinmembranes. Materials and Methods:Sixty blood samples from both smokers (n = 34) and nonsmokers (n = 26) based onpower analysis were collected and subjected for complete blood count andplatelet morphology indices (mean platelet volume, platelet distribution width,platelet–large cell ratio, and plateletcrit). Leukocyte- and platelet-richfibrin membrane (2,700 revolutions per minute for 12 minutes) and advancedplatelet-rich fibrin membrane (1,500 revolutions per minute for 14 minutes)were prepared using a standard protocol. Thirtytwo platelet-rich fibrinmembranes from 16 individuals were selected randomly from the two groups andwere subjected to morphologic examination using a scanning electron microscope.Results: Both of the groups werematched for age. Red cell counts and white cell counts showed no statisticaldifference between the groups. Platelet indices of smokers did show slightlyhigher values than the nonsmoking group. Scanning electron microscopic analysisshowed variations in the fiber width and pattern among smokers in both the leukocyte-and platelet-rich fibrin and advanced platelet-rich fibrin membranes. Plateletcell morphology of the smoking group demonstrated spiky architecture,suggesting an active state, while in the nonsmoking group, the platelet cellswere seen in clusters, suggesting a resting state. Conclusion: Scanning electron microscopic results show thatlong-term cigarette smoking does affect the thickness and arrangement of fiberarchitecture in both leukocyte- and platelet-rich fibrin and advancedplatelet-rich fibrin membranes and also could have an impact on activation ofplatelets.

    Keywords: fibrin networks, growth factor, in vitro study,morphology, platelet-rich fibrin, platelets, smoking
    Sridharan Srirangarajan / Vanama Sindhu / Ravi J. Rao / Srikumar Prabhu / Vinaya Rudresh