March/April 2020

Table of Contents


  • Editorial Feedback

    Roger D. Winland

    2020 March/April; 68(2):6.

    Full Article (PDF)
  • Ethics Does dentistry have an ethical obligation to be more sustainable?

    Toni Roucka

    2020 March/April; 68(2):8-10.

    Full Article (PDF)
  • Pain Management Understanding diagnosis of headache

    Christopher J. Spencer
    Henry A. Gremillion

    2020 March/April; 68(2):12-15.

    Full Article (PDF)
  • Pharmacology Recommendations for selecting 2% lidocaine with 1:100,000 epinephrine or 3% mepivacaine

    Elliot V. Hersh
    Mana Saraghi
    Paul A. Moore

    2020 March/April; 68(2):16-19.

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  • Oral Diagnosis Geographic bone destruction and Unilocular expansile mass

    Galal Omami

    2020 March/April; 68(2):74, 80.

    Full Article (PDF)
  • 2019 Reviewers General Dentistry expresses its gratitude to 2019 peer reviewers

    2020 March/April; 68(2):75-78.

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  • Self-Instruction Answers Exercises No. 435, 436, and 437 from the March/April 2019 issue

    2020 March/April; 68(2):79.

    Full Article (PDF)

Clinical Articles

  • Prosthodontics Can different etching protocols change the properties of a hybrid ceramic?

    Jean Soares Miranda
    Jaiane Bandoli Monteiro
    Pollyanna Nogueira Ferreira Silva
    Márcia Carneiro Valera
    Eduardo Bresciani
    Renata Marques de Melo

    The aim of this study was to evaluate the effects of different concentrations of hydrofluoric acid (HF) and etching times on the flexural strength, roughness, wettability, and type of failure of a hybrid ceramic. Blocks of the ceramic material were randomly divided into 7 groups (n = 13): a control group (no treatment) as well as experimental groups etched with 5% or 10% HF for 30, 60, or 90 seconds. Biaxial flexural test results indicated a statistically significant reduction in the resistance of the ceramic when conditioned with 10% acid (P < 0.01). Surface analyses revealed that the higher the concentration of the acid, the lower the wettability of the ceramic (P < 0.01). Based on these results, a 5% HF concentration is best indicated for the surface treatment of VITA ENAMIC.

    2020 March/April; 68(2):20-25.

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  • Periodontics VISTA technique in combination with chorionic allograft for gingival recession coverage: a case series

    Rajendran Poornima
    Kukkamalla Meena Anand
    Subraya Bhat 
    Kalyan Chakravarthy Pentapati
    Pratibha Gopalkrishna

    The vestibular incision subperiosteal tunnel access (VISTA) technique, a minimally invasive procedure, achieves multitooth recession coverage with a single access incision. The present case series aimed to provide information regarding the potential advantage of placing a chorionic membrane in combination with the VISTA technique to achieve recession coverage. The VISTA technique provided good results in terms of recession coverage. Although there was an improvement in the gingival biotype, the placement of a chorionic membrane did not provide any advantage in terms of percentage of root coverage.

    2020 March/April; 68(2):26-29.

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  • Basic Science Signs of the proximity of third molar roots to the mandibular canal: an observational study in panoramic radiographs

    Jhonatan Thiago Lacerda-Santos
    Gélica Lima Granja
    Maria Helena Chaves de Vasconcelos Catão
    Flaviano Falcão de Araújo
    George Borja de Freitas
    José Cadmo Wanderley Peregrino de Araújo-Filho
    Julliana Cariry Palhano Freire
    Eduardo Dias-Ribeiro
    Jalber Almeida dos Santos

    A study of panoramic radiographs found that the tooth positions most frequently associated with proximity between the third molar and the mandibular canal were position C (highest point of the third molar located at or below the cervical margin of the second molar) and the mesioangular position (long axis of the third molar angled mesially toward the second molar). A proximity between the third molar and mandibular canal was found significantly more frequently in female patients and in patients aged 24 years and younger (P < 0.001).

    2020 March/April; 68(2):30-35.

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  • Periodontics Topical tetracycline in the treatment of a 7-year-old child with necrotizing ulcerative gingivitis: a case report

    Brunno Santos de Freitas Silva
    Simone Sousa Silva Sant’Ana
    Mário Serra Ferreira
    Wilson José Mariano-Júnior
    Satiro Watanabe
    Fernanda Paula Yamamoto-Silva

    An aggressive case of necrotizing ulcerative gingivitis in a pediatric patient was treated with a topical solution of tetracycline. Complete remission of the lesions was observed within 14 days of initial treatment. 

    2020 March/April; 68(2):36-38.

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    Basic Science Bilateral presentation of different supernumerary teeth in nonsyndromic patients: case reports

    Anuj Jain 
    Saumya Taneja

    Bilateral occurrence of supernumerary teeth is rare. When supernumerary teeth do occur bilaterally, they are most often associated with a syndrome. This article presents case reports of 4 nonsyndromic patients with different forms of bilateral supernumerary teeth: mesiodentes, paramolars, distomolars, and parapremolars.

    2020 March/April; 68(2):39-42.

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    Self-Instruction Exercise No. GD453
  • Basic Science Degree of conversion of resin cements polymerized under different ceramic systems

    Márcio Leandro Von Dreifus Marinho
    Henrico Badaoui Strazzi Sahyon
    João Carlos Silos Moraes
    Wirley Gonçalves Assunção
    Paulo Henrique dos Santos

    This study evaluated the degree of conversion of resin cements polymerized under 5 ceramic systems. The findings showed that RelyX ARC resin cement displayed a higher degree of conversion than Maxcem Elite. For both cements, the degree of conversion increased gradually up to 24 hours after curing. The ceramic system used directly influenced the degree of conversion of RelyX ARC but not of Maxcem Elite.

    2020 March/April; 68(2):44-49.

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    Oral Medicine, Oral Diagnosis, Oral Pathology Erythema multiforme induced by fluconazole in an immunocompetent patient: a case report and review of the literature

    Vanessa Silvestre de Aquino da Silva
    Alice Engel Naves Freire
    Noé Vital Ribeiro Junior
    Felipe Fornias Sperandio
    Marina Lara de Carli
    João Adolfo Costa Hanemann

    Erythema multiforme is an acute hypersensitivity reaction that affects the skin and/or mucosa. This report describes the rare case of an immunocompetent patient with erythema multiforme induced by fluconazole. The patient’s use of the antifungal medication was immediately discontinued, and the hypersensitivity reaction was treated successfully with a single intramuscular dose of betamethasone. A literature review of similar cases is presented to aid in the diagnosis of severe adverse reactions to fluconazole. 

    2020 March/April; 68(2):50-54.

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    Self-Instruction Exercise No. GD454
  • Esthetics Esthetic reconstruction of teeth with enamel hypoplasia

    Mônica Irma Aparecida Valdeci de Souza
    Jéssica Patrícia Cavalheiro
    Diego Girotto Bussaneli
    Fabiano Jeremias
    Ângela Cristina Cilense Zuanon

    Enamel hypoplasia in the maxillary incisors was successfully treated with composite resin restorations placed with the aid of a direct silicone palatal guide, restoring function and esthetics in a pediatric patient.

    2020 March/April; 68(2):56-59.

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    Occlusion Comparison of bite force on the dominant and nondominant sides of patients with habitual unilateral chewing: a pilot study

    Sulthan Ibrahim Raja Khan
    Dinesh Rao
    Anupama Ramachandran
    Baskaran Veni Ashok

    The present study aimed to record the difference in bite force between the dominant and nondominant chewing sides of patients with a chewing-side preference. The maximal voluntary bite force (MVBF) of 95 adults was recorded and compared in pairs (dominant vs nondominant side; men vs women; and age < 30 vs ≥ 30 years) with independent-samples t tests. The mean MVBF was significantly greater (P < 0.001) on the dominant chewing side than on the nondominant chewing side in both the male and female groups. The differences between the male and female dominant sides and between the male and female nondominant sides were also statistically significant (P < 0.001). However, there was no statistically significant difference in bite force between the age groups.

    2020 March/April; 68(2):60-63.

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    Self-Instruction Exercise No. GD455
  • Prosthodontics Effect of radiotherapy on the artificial acrylic resin tooth bond to the acrylic resin denture base

    Clóvis Lamartine de Moraes Melo Neto
    Léuri Antunes da Silva Dantas 
    Ana Carolina Pedroni Meyer
    Marcos Antonio da Silva
    José Octávio Haggi Rodrigues Ferreira
    Gabriela Cristina Santin
    Sérgio Sábio

    This study evaluated the effect of different radiotherapy doses on the bond between acrylic resin teeth and their acrylic resin denture bases and found that a maximum radiation dose of 70 Gy weakened the tooth-base bond.  

    2020 March/April; 68(2):66-69.

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  • Endodontics An alternative 2-step cementation technique to reduce polymerization shrinkage stress in root canals: a case report

    Isis Almela Endo Hoshino
    Marjorie de Oliveira Gallinari
    Sandra Rahal Mestrener
    Naiara Reis Gil Anchieta
    Rodolfo Bruniera Anchieta

    This case report describes a simple 2-step cementation technique to reduce polymerization shrinkage of the resin cement and improve the fit of the fiber-reinforced post inside the root canal.

    2020 March/April; 68(2):70-72.

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  • Basic Science Relationship of maxillary posterior roots to the maxillary sinus and cortical bone: a cone beam computed tomographic study

    Lívia Machado Lima Makris
    Karina Lopes Devito
    Paulo Sérgio dos Santos D’Addazio
    Carolina Oliveira de Lima
    Celso Neiva Campos

    This study evaluated the relationship between the apices of maxillary posterior teeth (second premolar, first molar, and second molar) and the maxillary sinus floor (MSF) and maxillary cortical bone (MCB). Cone beam computed tomographic (CBCT) scanning was used to analyze 1660 roots from 678 teeth and determine the shortest distance between the root apex and MSF and between the root apex and buccal and palatal cortices of maxillary bone. The root apices were classified based on their relationship to the MSF: type 1, the root apex protruded into the maxillary sinus; type 2, the root apex was from 0 mm (touching the MSF) to 1 mm below the MSF; and type 3, the root apex was greater than 1 mm below the MSF. As the age of the subjects increased (older than 40 years), there was a significantly greater proximity of the teeth to the MCB (P < 0.05) and less proximity of second molars to the MSF (P = 0.005). First and second molars each presented a high prevalence of root apices that protruded into the maxillary sinus (type 1), 47.8% and 43.8%, respectively. Second premolars were more frequently classified as type 3 (71.7%) than first and second molars. The mesiobuccal root of the maxillary second molar was the root closest to the MSF, while the maxillary first molar was the tooth closest to the MCB.

    2020 March/April; 68(2):e1-e4.

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