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"Problematiche ortodontiche nel trattamento delle malformazioni dentoscheletriche di Classe II - Divisione 2"
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Severe side effects on all the anterior lower teeth of a bonded retainer: a clinical case : Gravi effetti collaterali sui denti anteriori inferiori di un retainer fisso: un caso clinico
No full textOBJECTIVES
This case report presents the possible and unexpected clinical severe complications of a bonded
mandibular lingual retainer and an
achievable therapeutic solution.
MATERIALS AND METHODS
18-year-old boy comes to our observation; he reports a previous
orthodontic treatment and not to
carry out regular check-ups. Intraoral examination shows: class I
malocclusion, flexible and intact
spiral wire retainer bonded on the
lingual surface of the lower front
teeth, inferior midline deviated to
the left side, lower incisors proclined and inclined to the left side,
both mandibular canines and incisors wrongly torqued. Orthopantomography (OPT) shows a
moderate root resorption of the
lower front teeth with a very important divergence of the roots of
left canine and lower incisors.
Cone beam computed tomography shows the root of the right
canine almost completely out of
the bone on its lingual side and
the root of the left canine out of
the bone on its buccal side.
We start a new orthodontic treatment to realign the teeth and to
correct the transverse malocclusion. At the end of treatment, the
smile of the patient was normalized with a good balance of the
occlusal plane.
RESULTS AND CONCLUSIONS
At the end of treatment, the smile
of the patient was normalized with
a good balance of the occlusal
plane. A good and stable molar
and canine class I occlusion was
achieved with correct overjet,
overbite and transversal relationships. Orthopantomography
showed the correction of the inclination of the lower front teeth
with a moderate apical root resorption of the four lower incisors
that was present also in the initial
OPT. CBCT showed the correction
of the axial inclination of the right
canine with a good lingual bone
thickness. On the left canine the
good axial inclination achieved
was evident; lingual bone thickness was ideal but on the buccal
side there was no adequate
amount of cortical bone.
Although fixed retainers are generally adequate in preventing relapse,
sometimes their inadvertent activity causes distortion of the dental
arch. If not periodically checked by
clinicians, such reported in this
case report, fixed retainers may
cause devastating complications
and orthodontic retreatment could
be the solution in restoring the
physiological arch shape.
CLINICAL SIGNIFICANCE
Fixed retainers can cause major
complications for the dental elements affected by the retainer in
terms of unwanted inclinations and
movements with consequent damage to the periodontal structures.
Regular monitoring by clinicians is
therefore highly recommended.
Orthodontic retreatment may
prove to be the ideal solution to restore the physiological shape of
the arch and the correct inclination
of the roots of the affected teeth.
OBJECTIVES This case report presents the pos sible and unexpected clinical se vere complications of a bonded mandibular lingual retainer and an achievable therapeutic solution. MATERIALS AND METHODS 18-year-old boy comes to our ob servation; he reports a previous orthodontic treatment and not to carry out regular check-ups. In traoral examination shows: class I malocclusion, flexible and intact spiral wire retainer bonded on the lingual surface of the lower front teeth, inferior midline deviated to the left side, lower incisors pro clined and inclined to the left side, both mandibular canines and in cisors wrongly torqued. Orthop antomography (OPT) shows a moderate root resorption of the lower front teeth with a very important divergence of the roots of left canine and lower incisorsCone beam computed tomogra phy shows the root of the right canine almost completely out of the bone on its lingual side and the root of the left canine out of the bone on its buccal side. We start a new orthodontic treat ment to realign the teeth and to correct the transverse malocclu sion. At the end of treatment, the smile of the patient was normal ized with a good balance of the occlusal plane. RESULTS AND CONCLUSIONS At the end of treatment, the smile of the patient was normal ized with a good balance of the occlusal plane. A good and sta ble molar and canine class I oc clusion was achieved with cor rect overjet, overbite and transversal relationships. Orthopan tomography showed the correc tion of the inclination of the lower front teeth with a moderate apical root resorption of the four lower incisors that was present also in the initial OPT. CBCT showed the correction of the axial inclination of the right canine with a good lin gual bone thickness. On the left canine the good axial inclination achieved was evident; lingual bone thickness was ideal but on the buccal side there was no ade quate amount of cortical bone. Although fixed retainers are gener ally adequate in preventing relapse, sometimes their inadvertent activi ty causes distortion of the dental arch. If not periodically checked by clinicians, such reported in this case report, fixed retainers may cause devastating complications and orthodontic retreatment could be the solution in restoring the physiological arch shape. CLINICAL SIGNIFICANCE Fixed retainers can cause major complications for the dental ele ments affected by the retainer in terms of unwanted inclinations and movements with consequent dam age to the periodontal structures. Regular monitoring by clinicians is therefore highly recommended. Orthodontic retreatment may prove to be the ideal solution to restore the physiological shape of the arch and the correct inclination of the roots of the affected teeth
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Author Correction: Periodontal evaluation of palatally impacted maxillary canines treated by closed approach with ultrasonic surgery and orthodontic treatment: a retrospective pilot study (Scientific Reports, (2021), 11, 1, (2843), 10.1038/s41598-021-82510-y)
No full textVariations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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