SELF-INSTRUCTION
Esthetics/Cosmetic Dentistry
Conservative approach to masking a darkened tooth with a direct composite resin restoration: a case report with 5-year follow-up
Elbert da Costa Sampaio
Camila de Sousa Caneschi
Rodrigo de Castro Albuquerque
Sâmia Ornelas
Allyson Nogueira Moreira
Luís Fernando dos Santos Alves Morgan
A direct conservative technique with minimal removal of tooth structure was used to restore a severely discolored endodontically treated tooth in a 25-year-old man. The darkened substrate was masked with an opacifier prior to restoration with composite resin. Despite slight incisal wear and loss of brightness, the veneer still provided satisfactory function and esthetics 5 years after placement.
2022 May/June; 70(3):17-20.
Self-Instruction Exercise No. GD492
Restorative Dentistry
Effect of decontamination procedures on marginal and internal adaptation in saliva-contaminated composite resin restorations
Eftychia Pappa
Konstantinos Masouras
Vasileios Margaritis
Afrodite Kakaboura
An in vitro study evaluated the effect of saliva contamination of dentin on the marginal and internal adaptation of composite resin restorations. Saliva contamination that occurred after adhesive application negatively affected adaptation, but reapplication of the adhesive restored the adaptation values.
2022 May/June; 70(3):22-26.
SELF-INSTRUCTION
Basic Science
Effects of polyvinyl chloride film and oxygen-blocking gel on irradiance and depth of cure
Fabrício Luscino Alves de Castro
Cláudia Cristina Braga
Ana Paula Albuquerque Guedes
Paulo Francisco Cesar
Flávia Bittencourt Pazinatto
This study examined the effect of oxygen-blocking gel (OBG) thickness and polyvinyl chloride (PVC) film fit on the irradiance from an LED source and the curing depth of a composite resin. Although no significant effects were found for curing depth, irradiance values were inversely influenced by OBG—the greater the OBG thickness, the lower the irradiance. The use of PVC film also reduced the irradiance.
2022 May/June; 70(3):27-32.
Self-Instruction Exercise No. GD493
Esthetics/Cosmetic Dentistry
Can brushing with regular and whitening dentifrices influence changes in color and micromorphologic surfaces of ceramic brackets subjected to coffee staining?
Alessandra Fernandes Gonçalves Pavan
Jurandir Antonio Barbosa
Flávio Henrique Baggio Aguiar
Roberta Tarkany Basting
This study compared the effects of regular and whitening dentifrices on changes in color and micromorphologic surfaces of ceramic orthodontic brackets following coffee staining. None of the dentifrices prevented the brackets from staining, but they did reduce the magnitude of color change. The regular dentifrice was the most effective at reducing color change.
2022 May/June; 70(3):34-40.
Periodontics
Treatment planning for a patient with generalized advanced periodontitis: a case report
Fei Yee Lim
Nurulhuda Mohd
The treatment planning process for a patient with generalized advanced periodontitis (stage IV, grade C) is discussed in this case report, which also reviews the indications for retaining or extracting periodontally compromised natural teeth.
2022 May/June; 70(3):41-45.
SELF-INSTRUCTION
Implants
Evaluation of deviation in implants placed at different depths with a prototype surgical guide: an in vitro study
Marlon Carvalho
João Marcelo Meireles Rodrigues
Pâmela Leticia Santos
Aline Oliveira
Livia Sertori Finoti
Rogério Margonar
The linear and angular deviations between planned and actual implant positions were assessed after a prototype surgical guide was used during surgery. Linear deviations in implant position increased significantly with each millimeter of implant depth (1, 2, 3, or 4 mm), but there were no significant differences in angular deviations.
2022 May/June; 70(3):46-50.
Full Article (PDF)
Self-Instruction Exercise No. GD494
Basic Science
Bone and gingival tissue thicknesses of maxillary anterior teeth with and without a metal post: a cone beam computed tomographic study
Matheus Sampaio de Oliveira
Paulo Victor Teixeira Doriguêtto
Bruno Salles Sotto-Maior
Karina Lopes Devito
The buccal bone and gingival thicknesses of maxillary anterior teeth with and without metal posts were measured on cone beam computed tomographic (CBCT) images. The CBCT images of teeth with metal posts showed alterations in bone and gingival measurements, suggesting a possible interference of metal artifacts.
2022 May/June; 70(3):52-55.
Full Article (PDF)
Laser Therapy/Electrosurgery
Use of high-power lasers in pediatric dental surgeries: case reports
Allana da Silva e Silva
Ana Margarida Melo Nunes
Pierre Adriano Moreno Neves
Andréa Dias Neves Lago
These case reports describe the use of high-power diode lasers to perform 3 minor oral surgical procedures—biopsy, lingual frenectomy, and operculectomy—in 2 children. The operative time in each case did not exceed 5 minutes, no sutures were used, and no postoperative complications were reported.
2022 May/June; 70(3):56-59.
Restorative Dentistry
Mechanical properties of bulk-fill composite resin with or without a final layer of conventional composite resin
Lucas Lara
Mateus Garcia Rocha
Livia Rodrigues de Menezes
Américo Bortolazzo Correr
Mario Alexandre Coelho Sinhoreti
Dayane Oliveira
The flexural strength and elastic modulus of different bulk-fill composite resin restorations were evaluated in specimens with or without a final layer of conventional composite of the same brand. The results indicated that a final layer of conventional composite can affect the mechanical properties of bulk-fill materials, but the effects are dependent on the type of conventional composite resin applied.
2022 May/June; 70(3):60-64.
Pediatric Dentistry
Prevalence and association of temporomandibular disorders with malocclusion and anxiety in children and adolescents: a cross-sectional observational study
Aida Mehdipour
Salva Khosroshahian
Hesaneh Pourhossein
Abolfazl Mohammadbeigi
Alireza Karimi
Interviews, physical examinations, and an anxiety rating instrument were used to evaluate the prevalence of temporomandibular disorders (TMDs) and the association of TMDs with malocclusion and anxiety in children aged 6 to 12 years. The results showed significant correlations between anxiety and TMDs, malocclusion and TMDs, and parafunctional habits and TMDs.
2022 May/June; 70(3):65-71.
Restorative Dentistry
Attitudes of dentists toward maintaining, repairing, or replacing direct composite resin restorations
Claudiôner de Oliveira e Silva
Lawrence Gonzaga Lopes
Érica Miranda de Torres
Ricardo Antônio Gonçalves Teixeira
Terezinha de Jesus Esteves Barata
Andreia Assis Carvalho
João Batista de Souza
A survey that included clinical scenarios was conducted to determine dentists’ reasons for replacement of direct composite resin restorations. According to respondents, the conditions most often warranting replacement were staining (esthetic property) and material fracture/retention (functional property). Replacement was the most frequently reported clinical decision, although repair was the FDI-recommended response for all the presented scenarios.
2022 May/June; 70(3):72-77.
