Discover the science behind modern endodontic and restorative dentistry. This collection of research articles is designed to support clinicians with evidence-based knowledge, helping improve treatment outcomes and clinical confidence.

Journal of the California Dental Association 2024

Minimally Invasive Cosmetic Restoration of Teeth Associated with Open Gingival Embrasures. Descriptive Case Series.

Álvaro Ferrando Cascales, Rubén Agustín Panadero, José Amengual Lorenzo, Salvatore Sauro, Antonio Mendoza Rodríguez, Raúl Ferrando Cascales, Ronaldo Hirata and David Clark. Universidad Católica de Murcia; Universitat de València; New York University College of Dentistry; Academy of Microscope Enhanced Dentistry, USA. J Calif Dent Assoc. 2024;52(1):2313244.

Summary: A 2-year clinical case series on closing anterior black triangles with the Bioclear injection moulding technique and Bioclear Black Triangle matrices. Seven patients received 36 restorations between the canines (24 upper, 12 lower). At 2 years every restoration was still in place (100% survival), with no fractures, detachment, secondary caries or colour change, and probing depths stayed at 3 mm or less. Loss of gloss and gingival bleeding were linked to plaque, which highlights the importance of hygiene and recall. Patients rated their satisfaction at a median of 9 out of 10.

Case 1: upper central black triangle before, during isolation with Black Triangle matrices, at 2 weeks and at 2 years
Figure 1. Case 1. (a) Before treatment. (b) Isolation with colour-coded Black Triangle matrices. (c) 2 weeks. (d) 2 years, with healthy gums and intact restorations.
Case 1 radiographs at 2 weeks showing composite adaptation and emergence profiles
Figure 2. Case 1 radiographs at 2 weeks. Composite adaptation and new emergence profiles, with no overhangs.
Case 2: canine-to-canine black triangle closure before, during, at 2 weeks and at 2 years
Figure 3. Case 2. Canine-to-canine closure. At 2 years there is gingivitis and loss of polish, because the patient did not return for maintenance.
Case 2 radiographs at 2 weeks showing subgingival margin integrity
Figure 4. Case 2 radiographs at 2 weeks. Subgingival margins are intact, with no gaps or voids.
Case 3: lower central black triangle closure with small yellow matrices
Figure 5. Case 3. Lower central black triangle closed with small yellow matrices. Shown before, immediately after, on X-ray at 2 weeks, and at 2 years.
Case 4: large yellow and green matrices in place, 2-week and 2-year results
Figure 6. Case 4. Large yellow and green matrices. Shown at 2 weeks, on X-ray, and at 2 years.
Case 5: large red matrix in the distal lateral embrasure, 2-week and 2-year results
Figure 7. Case 5. Large red matrix in a lateral embrasure. Shown at 2 weeks, on X-ray, and at 2 years.
Case 6: two large yellow matrices between lateral and central incisor, 2-week and 2-year results
Figure 8. Case 6. Two large yellow matrices between the lateral and central incisors. Shown at 2 weeks, on X-ray, and at 2 years.
Case 7: lower anterior black triangles treated simultaneously with small red matrices
Figure 9. Case 7. Several lower black triangles treated at once with small red matrices. Gum health and polish are stable at 2 years.

Figures reproduced unaltered from Ferrando Cascales Á, et al. J Calif Dent Assoc. 2024;52(1):2313244, doi:10.1080/19424396.2024.2313244. © 2024 The Author(s), published by Taylor & Francis Group, LLC, under a CC BY-NC-ND 4.0 licence. Captions summarised by E3Endo.

Products used in this study

Black Triangle (BT) Kit BT Matrix Refills Black Triangle Gauge BT Single Procedure Trial Kit Complete HD Anterior Kit

Journal of Dental Sciences 2017

Various heat-treated nickel-titanium rotary instruments were evaluated in S-shaped simulated resin canals.

Corresponding author. Department of Conservative Dentistry, Dental Research Institute, Seoul National University Dental Hospital, Seoul National University School of Dentistry, 101 Daehak-Ro, Jongno-Gu, Seoul 03080, Republic of Korea.

Scanning 2016

Cyclic Fatigue Resistance, Torsional Resistance, and Metallurgical Characteristics of V Taper 2 and V Taper 2H Rotary NiTi Files.

Contract grant sponsor: Ministry of Knowledge Economy (MKE, Korea). Conflicts of interest: None. Address for reprints: Kee-Yeon Kum, Department of Conservative Dentistry, Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea.

Scanning 2018

Microscopic Features of Fractured Fragment of Nickel-Titanium Endodontic Instruments by Two Different Modes of Torsional Loading.

Ibrahim H. Abu-Tahun,1 Sang Won Kwak,2,3 Jung-Hong Ha,3 and Hyeon-Cheol Kim 2 1 Department of Conservative Dentistry, School of Dentistry, The University of Jordan, Amman, Jordan 2 Department of Conservative Dentistry, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, Republic of Korea 3 Department of Conservative Dentistry, School of Dentistry, Kyungpook National University, Daegu, Republic of Korea Correspondence should be addressed to Hyeon-Cheol Kim;