Publications by authors named "A Sumathi Felicita"

10 Publications

Assessing the Potential Association Between Microbes and Corrosion of Intra-Oral Metallic Alloy-Based Dental Appliances Through a Systematic Review of the Literature.

Front Bioeng Biotechnol 2021 15;9:631103. Epub 2021 Mar 15.

Division of Oral Pathology, Department of Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jazan University, Jazan, Saudi Arabia.

Systematic review assessing the association between oral microorganisms and corrosion of intra-oral metallic alloy-based dental appliances. PubMed, Scopus, and Web of Science were searched using keyword combinations such as microbes and oral and corrosion; microbes and dental and corrosion; microorganisms and oral and corrosion; microorganisms and dental and corrosion. Out of 141 articles, only 25 satisfied the selection criteria. s, sulfate-reducing bacteria, sulfate oxidizing bacteria, Veilonella, Actinomyces, were found to have a potential association with corrosion of intraoral metallic alloys such as stainless steel, titanium, nickel, cobalt-chromium, neodymium-iron-boron magnets, zirconia, amalgam, copper aluminum, and precious metal alloys. The included studies inferred an association between oral microorganisms and intra-oral metallic alloys-based dental appliances, although, it is vital to acknowledge that most studies in the review employed an simulation of the intra-oral condition.
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http://dx.doi.org/10.3389/fbioe.2021.631103DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8005604PMC
March 2021

Orthodontic extrusion of Ellis Class VIII fracture of maxillary lateral incisor - The sling shot method.

Saudi Dent J 2018 Jul 15;30(3):265-269. Epub 2018 May 15.

Department of Orthodontics, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, 162, Poonamallee High Road, Chennai, Tamil Nadu, India.

The aim of this paper is to evaluate the efficacy of forced extrusion using the sling shot elastic. A 21 year adult patient reported with an Ellis Class VIII fracture of the maxillary right lateral incisor. Root canal treatment followed by a fiber reinforced composite post was placed and core build up was done. A metal button was bonded to the tooth. Begg brackets were placed from the second premolar on one side to the second premolar on the opposite side. 0.016″ × 0.025″ stainless steel was placed in ribbon mode. The ligature wire was placed as a sling shot from the button on the fractured tooth to the two adjacent teeth. 4 mm of extrusion was achieved and there was no evidence of root resorption. Forced extrusion was achieved in four months. The sling shot method is a very effective method of ligation. Light forces are delivered over a long duration with definitive results as compared to the inconsistent force delivery with conventional extrusion mechanics.
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http://dx.doi.org/10.1016/j.sdentj.2018.05.001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6011220PMC
July 2018

Quantification of intrusive/retraction force and moment generated during en-masse retraction of maxillary anterior teeth using mini-implants: A conceptual approach.

Dental Press J Orthod 2017 Sep-Oct;22(5):47-55

Saveetha University, Saveetha Dental College, Department of Orthodontics and Dentofacial Orthopedics (Chennai, India).

Objective: The aim of the present study was to clarify the biomechanics of en-masse retraction of the upper anterior teeth and attempt to quantify the different forces and moments generated using mini-implants and to calculate the amount of applied force optimal for en-masse intrusion and retraction using mini-implants.

Methods: The optimum force required for en-masse intrusion and retraction can be calculated by using simple mathematical formulae. Depending on the position of the mini-implant and the relationship of the attachment to the center of resistance of the anterior segment, different clinical outcomes are encountered. Using certain mathematical formulae, accurate measurements of the magnitude of force and moment generated on the teeth can be calculated for each clinical outcome.

Results: Optimum force for en-masse intrusion and retraction of maxillary anterior teeth is 212 grams per side. Force applied at an angle of 5o to 16o from the occlusal plane produce intrusive and retraction force components that are within the physiologic limit.

Conclusion: Different clinical outcomes are encountered depending on the position of the mini-implant and the length of the attachment. It is possible to calculate the forces and moments generated for any given magnitude of applied force. The orthodontist can apply the basic biomechanical principles mentioned in this study to calculate the forces and moments for different hypothetical clinical scenarios.
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http://dx.doi.org/10.1590/2177-6709.22.5.047-055.oarDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5730136PMC
August 2018

Orthodontic management of a dilacerated central incisor and partially impacted canine with unilateral extraction - A case report.

Saudi Dent J 2017 Oct 14;29(4):185-193. Epub 2017 Jun 14.

Department of Orthodontics, Saveetha Dental College, Saveetha University, Chennai, Tamil Nadu, India.

Aim: To align a dilacerated maxillary central incisor and partially impacted canine with unilateral extraction in a young patient with skeletal deep bite.

Materials And Methods: A 14 year old male patient reported to the hospital with skeletal deep bite (basal plane angle-17°), severe horizontal pattern of growth (Go-Gn to Sn -22°), upright maxillary incisors (U1 to NA -26°) and retroclined lower incisors (L1 to NB -11°). The maxillary left central incisor was dilacerated, and the maxillary left canine was partially impacted. Unilateral extraction of the left maxillary premolar and left mandibular central incisor was done. A canine disimpaction spring was used to align the impacted canine. An anterior bite plane was given to open the bite.

Results: Superimposition of lateral cephalogram (T1, T2) revealed bite opening, normal overjet and overbite. There was backward rotation of the mandible and increase in lower anterior facial height. There was no evidence of root resorption or loss of vitality in the dilacerated tooth. Clinically the canine was well aligned in the arch.

Conclusion: Orthodontic management of a dilacerated incisor can be done without root resorption or loss of vitality. The partially impacted canine was well aligned in the arch. Unilateral extraction can produce good treatment results.
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http://dx.doi.org/10.1016/j.sdentj.2017.04.001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5634799PMC
October 2017

The orthodontic extraction of permanent molars: a literature review.

Aust Orthod J 2015 May;31(1):69-77

The most common cause of dental crowding is the presence of an arch-length--tooth-size discrepancy. Conventional methods of gaining space in orthodontics involve the extraction of teeth, often premolars. However, there are a number of clinical situations in which the extraction of permanent molars might be considered. This paper highlights the indications, advantages, disadvantages and timing of the extraction of the first, second and third permanent molars in the treatment of a crowded malocclusion.
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May 2015
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