January/February 2022

Table of Contents


  • Editorial It sure is a wonderful lifeā€¦ AGD celebrates 70 years

    Timothy F. Kosinski

    2022 January/February;70(1):5.

    Full Article (PDF)
  • Restorative Dentistry Immediate rotational path removable partial denture replacing mobile teeth

    Roger A. Solow

    2022 January/February;70(1):6-9.

    Full Article (PDF)
  • Oral Diagnosis Multilocular lesion of the mandibular body and Bilateral clusters of radiopacities

    Galal Omami

    2022 January/February;70(1):78,80.

    Full Article (PDF)
  • Self-Instruction Answers Exercises No. GD468, GD469, and GD470 from the January/February 2021 issue

    2022 January/February;70(1):79.

    Full Article (PDF)

Clinical Articles


    Implants Variations in bone quantity in the posterior mandible: a cross-sectional cone beam computed tomographic study

    Yaser Safi
    Reza Amid
    Maryam Alizad-Rahvar

    In this retrospective cross-sectional study, cone beam computed tomography (CBCT) was used to assess bone quantity variations in the posterior mandible of edentulous patients. Differences in cortical bone thickness and ridge dimensions were significantly correlated with differences in the age or sex of the patient or the site of measurement. Anatomical variations in the mandibular posterior region of edentulous patients necessitate comprehensive CBCT assessment prior to implant placement in this area. 

    2022 January/February;70(1):10-16.

    Full Article (PDF)
    Self-Instruction Exercise No. GD486
  • Implants Comparison of the fit of surgical guides manufactured with low-cost 3D printers

    Gregory W. Bennett
    Sung K. Kim

    This in vitro study evaluated the accuracy of fit of surgical guides printed with 4 low-cost desktop 3-dimensional printers: SparkMaker Original, Photon, MP Mini SLA, and Epax X1. SparkMaker Original, Photon, and Epax X1 were able to consistently produce surgical guides within the accepted tolerance values. The Epax X1 surgical guide group had a significantly higher mean percentage of fit within the tolerance level.

    2022 January/February;70(1):18-21.

    Full Article (PDF)
  • Endodontics Effectiveness of reciprocating and rotary retreatment files in the removal of endodontic filling material

    Érica Reginato Cardoso
    Izabela Volpato Marques Tookuni 
    Carlos Alberto Herrero de Morais
    Nair Narumi Orita Pavan
    Gabriela Cristina Santin
    Marcelo Capitanio
    Marcos Sergio Endo

    This study compared the effectiveness of 2 files for root canal retreatment, Reciproc and Mtwo retreatment files, by analyzing the percentage of remaining filling material left in the root canal as well as in each individual third of the root canal. There were no significant differences between the systems, but both left significantly more residual material in the apical third of the root. 

    2022 January/February;70(1):22-25.

    Full Article (PDF)
  • Oral Medicine, Oral Diagnosis, Oral Pathology Cartilaginous choristoma on the lateral surface of the tongue: a case report

    Fábio Fernandes Borém Bruzinga
    Bruna Rafaela Mendes Costa
    Letícia Parreira de Almeida
    Mariana Pires de Souza
    Martinho Campolina Rebello Horta
    Soraya de Mattos Camargo Grossmann

    A cartilaginous choristoma is a nonneoplastic nodular growth of histologically normal cartilage in an abnormal site. This report describes a case of a cartilaginous choristoma on the lateral surface of the tongue in a 65-year-old woman. 

    2022 January/February;70(1):26-29.

    Full Article (PDF)

    Basic Science Comparison of 3- and 90-day bond strengths of 3 types of cement to nickel-chromium alloy

    Isabela Caroline de Sousa Ervolino
    Victor Augusto Alves Bento
    Juliana Lujan Brunetto
    Brenda Farias Cavalcanti Vaz de Melo Laborde
    Isabela Samudio Arantes
    Daisilene Baena Castillo

    In an in vitro study of the 3- and 90-day shear bond strengths of 3 cements used for luting metal-ceramic crowns, the self-adhesive resin cement group showed the greatest bond strength, followed by the resin-modified glass ionomer cement group, while the bond strength of the zinc phosphate cement group was significantly lower. A subgroup of resin-modified glass ionomer cement that was treated with microsandblasting showed significantly increased bond strengths at 90 days.

    2022 January/February;70(1):30-33.

    Full Article (PDF)
    Self-Instruction Exercise No. GD487
  • Endodontics Management of separated endodontic instruments: case reports

    Ganesh Jadhav
    Priya Mittal

    Four cases of separated endodontic instruments are presented with 1-year clinical and radiographic follow-up. Different retrieval techniques were used, including ultrasonic tips, the wire loop method, safe-sided H-files, the braiding technique, and bypassing of the file. The key to successful management of a separated instrument is understanding the factors that influence the case and selecting an appropriate technique. 

    2022 January/February;70(1):35-39.

    Full Article (PDF)

    Endodontics Evaluation of the pH, calcium ion release, and antibacterial effect of a premixed bioceramic endodontic sealer

    Sara Muhammad El-Sherif
    Dalia Ibrahim Sherief
    Dina Ahmed El-Refai

    This study sought to compare a bioceramic sealer (TotalFill) and a calcium hydroxide (Ca[OH]2) sealer (Sealapex) in terms of their pH, calcium ion release, and antibacterial effect against Enterococcus faecalis bacteria. The Ca(OH)2-related properties of TotalFill bioceramic sealer were superior to those demonstrated by Sealapex Ca(OH)2 sealer.

    2022 January/February;70(1):40-44.

    Full Article (PDF)
    Self-Instruction Exercise No. GD488
  • Basic Science The influence of final endodontic irrigation techniques and irrigants on the push-out resistance of glass fiber posts

    Juliana Rodrigues Paes Barreto
    Leandro de Moura Martins
    Fabíola Mendonça da Silva Chui
    Danielson Guedes Pontes 
    Emilio Carlos Sponchiado, Jr
    Luciana Mendonça da Silva

    This study evaluated the influence of 3 irrigation techniques—positive-pressure irrigation, passive ultrasonic irrigation, and continuous ultrasonic irrigation—on the push-out resistance of glass fiber posts. Continuous ultrasonic irrigation was the best activation technique; it achieved greater bond strengths of glass fiber posts to root dentin, irrespective of the irrigating solution.

    2022 January/February;70(1):46-50.

    Full Article (PDF)
  • Orthodontics Imaging of the upper airway: which method is best for orthodontic assessment?

    Eliana Dantas Costa
    Danieli Moura Brasil
    Hugo Gaêta-Araujo
    Varner Leroy Leggitt
    Gina Delia Roque-Torres

    When measurements of pharyngeal airway subregions on lateral cephalometric and cone beam computed tomographic (multiplanar reconstruction [MPR] and 3-dimensional reconstruction) images were compared in relation to skeletal class, there were significant differences in linear measurements of the oropharynx and hypopharynx. Based on the study findings, MPR images should be used for visualization of the pharyngeal airway subregions.

    2022 January/February;70(1):51-55.

    Full Article (PDF)
  • Infection Control Efficacy of various decontamination methods and sterilization on contaminated and inoculated diamond-coated burs

    Nicole M. Wirth
    Lori E. Henrichs
    Daniel Savett
    Wen Lien
    Michael Crabtree
    Kraig S. Vandewalle

    This study evaluated the efficacy of various methods for decontamination of diamond-coated burs contaminated with enamel and dentinal debris and inoculated with various microorganisms. No significant bacterial growth was found in any of the test groups. The use of a cleaning stone in combination with manual or ultrasonic cleaning resulted in the least amount of remaining tooth debris. 

    2022 January/February;70(1):56-60.

    Full Article (PDF)
  • Oral Medicine, Oral Diagnosis, Oral Pathology Epidermoid cyst mimicking a thyroglossal duct cyst in a pediatric patient: a case report

    Géssica Vasconcelos Godinho
    Everton José da Silva
    Cristhiane Almeida Leite da Silva
    Luiz Evaristo Ricci Volpato

    This article describes the case of an epidermoid cyst mimicking a thyroglossal duct cyst in a pediatric patient. The diagnostic hypothesis of thyroglossal duct cyst was not supported during surgery, and the lesion was treated with simple enucleation. The histopathologic results indicated the cyst was an epidermoid cyst, highlighting the limitations of computed tomography for diagnosis of this type of mass. 

    2022 January/February;70(1):61-64.

    Full Article (PDF)
  • Basic Science Effect of luting cement thickness on the bond strength of glass fiber posts to dentin

    Fabio Cesar Lorenzoni
    Diego Rodrigo Paulillo Bazan
    Karina Rodelini Silva
    Maria Tereza Morais de Lima
    Verônica Pereira de Lima
    Leandro de Moura Martins

    This study evaluated the effect of cement thickness and luting cement type on the push-out bond strength of glass fiber posts. The results suggested that the type of cement used played an important role in bond strength, but cement thickness did not. Adhesive failure between the dentin and cement layer was the most frequently observed failure mode. 

    2022 January/February;70(1):65-71.
    Full Article (PDF)
  • Implants Artifacts caused by titanium implants in CBCT images of the mandible: an experimental study

    Karolina Aparecida Castilho Fardim
    Alessiana Helena Machado
    Neuza Maria Souza Picorelli Assis 
    Bruno Salles Sotto-Maior
    Letícia Queiroz Mauad
    Karina Lopes Devito

    This study quantified metallic artifacts on CBCT images of dental implants placed in different regions of the mandible and with different field of view and voxel sizes. More artifacts were produced under conditions of a smaller field of view or voxel, and more artifacts were found in the incisor region than other regions. 

    2022 January/February;70(1):72-77.

    Full Article (PDF)