1,721,196 research outputs found
The impact of tooth-borne vs computer-guided bone-borne rapid maxillary expansion on pain and oral health–related quality of life: a parallel cohort study
No full textIntroduction: The primary aim of this study was to investigate and compare perceived pain intensity and oral health–related quality of life (OHRQOL) results during the activation phase of rapid maxillary expansion (RME), with tooth-borne and bone-borne devices. In addition, a secondary aim of this study was to evaluate the correlation between pain scales and the shortened Oral Health Impact Profile (OHIP-14) questionnaire. Methods: Thirty-six subjects (16 girls and 20 boys) with a mean age of 12.3 years (standard deviation, 0.82 years) were randomized into 2 groups. Group A received treatment with hyrax appliance, and group B received a computer-guided skeletal RME appliance. The same type of expansion screw and screw activation or expansion protocol were used. Two rating scales were used to assess the subject's pain during the activation phase of RME: a Graphic Rating Scale for Pain (GRS) and the Wong-Baker Faces Pain Scale (FPS). The OHIP-14 was used to evaluate the impact of RME on OHRQOL before the beginning of the treatment at day 3 and day 7 follow-ups. Painkillers were forbidden during the active phase of RME. Descriptive statistics, Student t test, and Pearson correlation were used. Significance was set at P ≤0.05. Results: A total of 36 subjects, divided into 2 groups, were treated in the study. Regarding the level of pain, the Student t test showed statistically significant higher pain in group B—although only on the first day of screw activation (GRS, P = 0.01; FPS, P <0.01). For the following days, there were no significant differences in pain levels between groups. The OHIP-14 showed no statistically significant difference at baseline (P = 0.32) and day 3 (P = 0.88) and day 7 (P = 0.85) follow-ups between the 2 groups. The Pearson correlation coefficient showed a statistically significant association between the 2 different scales of pain (GRS and FPS) but not a statistically significant correlation between GRS and FPS scales and OHIP-14. Conclusions: A higher perceived pain intensity in the patients treated using a bone-borne computer-guided skeletal RME appliance was limited to the first day of screw activation. There were no statistically significant differences between the 2 types of treatment in terms of their impact on OHRQOL and no statistically significant correlation between pain scales and the OHIP-14 questionnaire
Comparison of changes in skeletal, dentoalveolar, periodontal, and nasal structures after tooth-borne or bone-borne rapid maxillary expansion: a parallel cohort study
No full textIntroduction: This parallel cohort study aimed to assess the dentoalveolar, skeletal, periodontal, and airway effects of tooth-borne (hyrax) and computer-guided miniscrew-supported rapid palatal expansion appliances. Methods: Thirty-six subjects were randomly allocated into 2 groups. Eighteen subjects (mean age, 12.2 years; male-to-female ratio, 10:8) were assigned to receive treatment with the hyrax appliance (group A), and 18 subjects were treated with the computer-guided miniscrew-supported appliance (group B). The same type of expansion screw and expansion protocol was used in both groups. Linear and angular measurements of skeletal, dentoalveolar, periodontal, and nasal floor changes were performed on the pretreatment and posttreatment cone-beam computed tomography images (6-month follow-up). Descriptive statistics and the independent Student t test were used for the statistical analysis. Intraoperator reliability was evaluated using a 2 sample t test. The level of significance was P ≤0.05. Results: Ten subjects were censured because posttreatment cone-beam computed tomography imaging was not performed because of the coronavirus disease 2019 pandemic. In the remaining 26 subjects, increases in linear measurements were observed in both groups. The transversal skeletal increase was greater and statistically significant in the group treated with the bone-borne expander (P ≤0.05). The dentoalveolar transverse diameters were greater in the tooth-supported expander group, with no statistically significant difference between the groups. The buccal inclination of the maxillary first molar was observed in the group with the tooth-borne expander, with a statistically significant difference between the 2 groups. A slight reduction of buccal and palatal thicknesses at the level of the maxillary first molars was observed in both groups, smaller in the skeletal expander group, with a statistically significant difference between the 2 groups only on the right buccal cortical plate. The width of the nasal floor increased more in the group with skeletal expander with a statistically significant difference of 2 mm. Conclusions: Computer-guided miniscrew-supported maxillary expanders allowed a greater transversal increase of the nasal-maxillary skeletal structures by reducing the dentoalveolar side effects of the tooth-supported devices
The combined use of corticotomy and clear aligners: a case report
Full text linkOBJECTIVE:
To describe an orthodontic treatment that combines an esthetic approach (clear aligners) with surgery (alveolar corticotomy).
MATERIALS AND METHODS:
A patient with moderate dental crowding and Class I skeletal and molar relationships was selected. Orthodontic records of the patient were taken. Periodontal indexes, oral health-related quality of life (OHRQoL), and treatment time were evaluated. After we reflected a full-thickness flap beyond the teeth apices, the cortical bone was exposed on the buccal aspect and a modified corticotomy procedure was performed. Interproximal corticotomy cuts were extended through the entire thickness of the cortical layer, just barely penetrating into medullary bone. Orthodontic force was applied on the teeth immediately after surgery.
RESULTS:
Total treatment time was 2 months. Periodontal indexes were improved after correction of crowding. A deterioration of OHRQoL was limited to 3 days following surgery.
CONCLUSION:
This case report may encourage the use, limited to selected cases, of corticotomy associated with clear aligners to treat moderate crowding
Is a two-month healing period long enough to achieve osseointegration? A prospective clinical cohort study
No full textThe aim of this study was to evaluate the effectiveness of loading at 2 months after the surgical placement of implants. A tapered implant was used. Implant stability was determined using resonance frequency analysis at implant insertion (T0; primary stability), after 2 months (T1), and at the 6-month follow-up (T2). Descriptive statistics and the t-test were used. Significance was at P ≤ 0.05. A total of 268 implants were inserted in 142 patients. No patient dropped out and no implant had failed at the 6-month follow-up. The mean implant stability quotient value (ISQ) increased over time, with a statistically non-significant difference for T0 vs. T1 (P = 0.08) and a statistically significant difference for T1 vs. T2 (P = 0.0018) and T0 vs. T2 (P = 0.000). Only 99 implants, characterized by an extremely high mean primary stability value (80.34), did not have a recorded increase in ISQ at T1. A 2-month healing period allowed the implant to achieve secondary stability, confirming the effectiveness of the loading protocol at 2 months
The influence of mandibular third molar germectomy on the treatment time of impacted mandibular second molars using brass wire: a prospective clinical pilot study
No full textThe brass wire ligature is an efficient method to correct a moderately mesially impacted mandibular second molar (MM2). The aim of this prospective clinical pilot study was to evaluate the influence of mandibular third molar (MM3) germectomy on the treatment time for this procedure and to determine its impact on oral health-related quality of life (OHRQoL) using the short-form Oral Health Impact Profile (OHIP-14). The STROBE guidelines were followed. Impacted MM2 were assigned randomly to receive brass wire ligature treatment either with germectomy (group A) or without germectomy (group B). Descriptive statistics and the Student t-test were used in the statistical analysis; significance was set at P≤0.05. One thousand and thirty patients were assessed. Fourteen subjects with 20 mesially angulated (range 25-40°) impacted MM2 were identified. Paired comparisons of groups A and B showed no statistically significant difference in treatment time (171days for group A and 174days for group B; P=0.440), but a statistically significant difference in OHIP-14 values at the 3- (P=0.017) and 7-day (P=0.002) follow-up. The brass wire technique can be used effectively in moderately impacted MM2, but the combined use of MM3 germectomy does not influence the treatment time and shows a negative impact on OHRQoL
La disinclusione del secondo molare mandibolare con I'utilizzo del filo di ottone: uno studio clinico prospettico. The treatment of impacted mandibular second molars using brass wire: a prospective clinical study
No full textOBIETTIVI
Valutare l’efficacia della tecnica del
filo di ottone per l’uprighting dei secondi
molari mandibolari (MM2) inclusi
mesio-angolati, l’influenza della
germectomia del terzo molare inferiore
(MM3) sul tempo di trattamento
e l’impatto della germectomia sulla
qualità della vita del paziente.
MATERIALI E METODI
24 MM2 sono stati sottoposti a
trattamento di disinclusione con
germectomia (gruppo A) o senza
germectomia (gruppo B).
RISULTATI
Tutti i MM2 sono stati disinclusi. Non
c’è stata una differenza statisticamente
significativa nel tempo di trattamento
tra i due gruppi. La germectomia
ha influenzato negativamente
la qualità della vita del paziente.
CONCLUSIONI
La tecnica del filo di ottone è efficace.
La germectomia del MM3
non influenza il tempo di trattamento,
ma incide negativamente
sulla qualità della vitaOBJECTIVES To evaluate the efficacy of brass wire ligature to correct a moderately me- sially-impacted mandibular second molar (MM2). The influence of third mandibular molar (MM3) germecto- my on the treatment time and its impact on oral health-related quality of life (OHRQoL) were also evaluated. MATERIALS AND METHODS 24 MM2 impacted were randomly assigned to receive either a wire brass treatment with germectomy (group A) or without germectomy (group B). RESULTS In all cases the impaction was corrected. The paired comparisons between group A and group B showed no statistically significant difference in the treatment time and a statistically significant difference of OHRQoL. CONCLUSIONS The brass wire technique is effective. The combined use of germectomy does not influence the treatment time but has a negative impact on OHRQoL
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
La valutazione del fundraising
No full textcome si può valutare l'efficacia di una campagna di fund raising, tenendo conto di: tipologia di potenziali donatori, corporate reputation della cooperazione sociale locale, capacità di produrre comunicazione sociale efficace, presenza del ruolo del bilancio sociale dell'impresa, tipologie di stakeholder ecc.
Il saggio contiene indicazioni molto dettagliate su come valutare il FR, il raggiungimento degli obbiettivi, i target specifici effettivamente raggiunti, l’importanza della “restituzione” e dell’”accountability”, con analitiche precisazioni metodologiche. La parte empirica del lavoro, a cui si collega il saggio metodologico, è stata finanziata dalla cooperazione della provincia di Mantova.
Saggio di 20 pagine, Pubblicato in collana dotata di referee anonimi
Mirror imaging of impacted and supernumerary teeth in dizygotic twins: a case report
Full text linkBackground: Mesiodens is the most common type of supernumerary tooth found in the premaxilla. It might be discovered during the clinical examination as a casual finding on a radiograph or as the cause of an unerupted maxillary central incisor. The genetic transmission of supernumerary and impacted teeth is poorly understood. Mirror imaging in twins has been reported frequently in relation to several unilateral dental anomalies including mesiodens. This phenomenon is the appearance of an asymmetrical feature or anomaly occurring on the right side of one twin but on the left side of the other twin. The event of mesiodens mirror imaging in monozygotic twins has been described in literature.
Results: This is the first reported case of mesiodens mirror imaging in dizygotic twins. The described mesiodens caused the eruption failure of maxillary permanent incisors. The supernumerary teeth were removed to facilitate the spontaneous eruption of the impacted permanent maxillary incisors.
Clinical Implications: Studies related to supernumerary teeth can be useful to clinicians in the early diagnosis of this anomaly. Clinical and radiographic examinations provide a correct therapeutic approach
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