scholarly journals Evaluation of ceramic veneer adaptation by optical coherence tomography: a clinical report

2021 ◽  
Vol 24 (2) ◽  
Author(s):  
Luís Fellipe Moraes Castello ◽  
Nathalia Del Rio Lyra Graça ◽  
Luana Osório Fernandes ◽  
Marlus da Silva Pedrosa ◽  
Anderson Stevens Leonidas Gomes ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Color Change ◽  
Correct Identification ◽  
Clinical Report ◽  
Optical Coherence ◽  
Central Incisor ◽  
Oral Rehabilitation ◽  
Maxillary Central Incisor ◽  
Color Changes ◽  
Aesthetic Dentistry

Introduction: Ceramic veneers represent a treatment approach in aesthetic dentistry. They are indicated in cases of alterations in size, contour, form and color of the teeth. The clinical and radiographic examinations may not allow the correct identification of failures in the treatment with ceramic veneers. Objective: To report the use of Optical Coherence Tomography (OCT) for the evaluation and repair of an aesthetic oral rehabilitation involving ceramic veneers. Case report: A 24-year-old female patient complained of unsatisfied color change in the ceramic veneer placed on the right maxillary central incisor. The clinical examination showed color changes between the middle and incisal thirds of mesial surface of the tooth crown. The OCT sagittal images evidenced the presence of bubbles or gaps in the adhesive interface. The treatment consisted of repair of the restoration by infiltration of a composite resin. Conclusion: The OCT was found to be valid tool to evaluate the adaptation of the ceramic veneer placed on the maxillary central incisor.   Keywords Esthetics, Dental; Dental Veneers; Tomography, Optical Coherence.

scholarly journals Endodontic Treatment of a Maxillary Central Incisor with Two Roots

2013 ◽  
Vol 14 (2) ◽  
pp. 345-347 ◽  
Author(s):  
Hamid Jafarzadeh ◽  
Amir Maghsoudlou ◽  
Maryam Forghani
Keyword(s):  
Root Canal ◽  
Healing Process ◽  
Endodontic Treatment ◽  
Clinical Report ◽  
Central Incisor ◽  
Root Canal Therapy ◽  
Maxillary Central Incisor ◽  
Root Canals ◽  
Dental Anatomy ◽  
Root Canal Morphology

ABSTRACT Aim This clinical report presents a rare case of maxillary central incisor with two separate roots. Background Unusual morphology of the roots and root canals may exist in any tooth. Recognition of the dental anatomy and its variations is necessary for successful endodontic therapy. It is well known that maxillary incisors are usually single-rooted teeth. Case report The root canals were instrumented with conventional hand files and Gates Glidden and obturated by using the lateral technique. Recall radiograph after 1 year shows the healing process of the preoperative apical periodontitis. Conclusion and clinical significance Clinicians should be aware of unexpected root canal morphology when performing root canal therapy. The present case demonstrated the importance of accurate preoperative radiograph and adequate access preparation. How to cite this article Maghsoudlou A, Jafarzadeh H, Forghani M. Endodontic Treatment of a Maxillary Central Incisor with Two Roots. J Contemp Dent Pract 2013;14(2):345-347.

scholarly journals Assessment of Blood Clot Composition by Spectral Optical Coherence Tomography: An In-Vitro Study

2020 ◽  
Author(s):  
Yonghong Ding ◽  
Mehdi Abbasi ◽  
Ahmed M. Eltanahy ◽  
Daniel R. Jakaitis ◽  
Daying Dai ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Color Change ◽  
Integrated System ◽  
Optical Coherence ◽  
Signal Attenuation ◽  
Jude Medical ◽  
High Penetration ◽  
Back Scattering ◽  
Group A

Purpose: Optical coherence tomography (OCT) has the potential for <i>in vivo</i> clot composition characterization in difficult mechanical embolectomy cases. We performed an <i>in vitro</i> study to determine the OCT characteristics of red blood cells (RBCs) and fibrin rich clots.Materials and Methods: Analogues of 5 compositions of clots (5% to 95% RBCs from Group A to E) were created from human blood. The blood mixture was injected into the bifurcation of a 3D printed bifurcated silicone tube. The OPTISTM Integrated System (St. Jude Medical Inc.) was used to identify the magnitude of OCT signals from different compositions of clots. Martius Scarlett Blue trichrome (MSB) staining was performed to confirm the composition of RBCs and fibrin in each clot.Results: Group A and B showed less signal attenuation (less than 30%) from its surface to the inside, which indicated high penetration (low-back scattering). Group C indicated intermediate signal attenuation (60%) from its surface to inside the clots, in which signals were found even at the periphery of the clot. Group D and E were superficially signal rich with more signal attenuation (more than 80%) from its surface to the inside indicating low penetration (high-back scattering). Signal-free shadowing was shown in 3 clots in Group E. MSB staining indicated color change (from red in fibrin-rich clots to yellow in RBC-rich clots).Conclusion: Different compositions of clots can be assessed using OCT. Fibrin-rich clots have homogeneous signals with high penetration, while RBC-rich clots can be recognized as superficially signal rich with low penetration.

scholarly journals Color stability and fluorescence of different orthodontic esthetic archwires

2012 ◽  
Vol 83 (1) ◽  
pp. 127-132 ◽  
Author(s):  
Dayanne Lopes da Silva ◽  
Claudia Trindade Mattos ◽  
Marcus Vinicius Almeida de Araújo ◽  
Antônio Carlos de Oliveira Ruellas
Keyword(s):  
Color Change ◽  
Color Stability ◽  
Nickel Titanium ◽  
National Bureau ◽  
Central Incisor ◽  
Fiber Reinforced Composite ◽  
Staining Solution ◽  
Color Changes ◽  
Reinforced Composite ◽  
Post Hoc

Abstract Objective: To evaluate the color stability of six esthetic archwires at different time periods and their fluorescence. Materials and Methods: Samples were evaluated after 7, 14, and 21 days of immersion in staining solution. Color measurements were performed by means of a spectrophotometer according to the Commission Internationale de I'Eclairage L*a*b* system, and color changes (ΔE*) and National Bureau of Standards units were computed. The fluorescence of as-received samples was evaluated by two observers and compared with that of a bovine central incisor. Statistical differences were investigated using analysis of variance and Tukey's post hoc test. Results: All brands showed statistically significant color change after 21 days (ΔE* from 1.88 to 12.06). The Optis archwire (fiber-reinforced composite) presented the highest color alteration, although staining was observed only near its ends. The Trianeiro archwire (coated nickel-titanium) and the Ortho Organizers archwire (coated stainless steel) presented with less color change. The Optis archwire was the only one that presented with fluorescence similar to that of bovine teeth. Conclusions: All esthetic archwires assessed showed clinically noticeable color change after 21 days in staining solution. The optical properties of currently available esthetic archwires may not yet be ideal.

scholarly journals Aesthetic implant: A new era of aesthetic dentistry

2016 ◽  
Vol 9 (3) ◽  
pp. 160
Author(s):  
Md. Mujibur Rahman Howlader ◽  
Tahmina Tamanna ◽  
Md. Abdul Hannan Sheikh ◽  
Rozina Akter ◽  
Tohfa-A- Zannat ◽  
...  
Keyword(s):  
Preoperative Planning ◽  
Treatment Options ◽  
Central Incisor ◽  
Aesthetic Outcome ◽  
New Era ◽  
Maxillary Central Incisor ◽  
Aesthetic Dentistry ◽  
High Level ◽  
Natural Tooth ◽  
Missing Tooth

<p>The dental implant is used to replace the natural tooth system. It requires comprehensive preoperative planning and precise surgical execution. In this case report, a 45 year old male presented with missing upper left maxillary central incisor which was extracted 5 months back. He had discomfort during function and unwillingness to smile. He wanted to replace that edentulous area. The treatment options for replacing the missing tooth were discussed with the patient. Finally, with patient's consent the decision was made to replace that edentulous area with an implant supported porcelain fused to metal prosthesis in an esthetic manner. Recall visits exhibited patient's high-level confidence of smile with optimum satisfaction and successful aesthetic outcome.</p><p> </p>

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