1,720,983 research outputs found
Smile analysis: The buccal corridor | [Valutazione del corridoio vestibolare nell'analisi del sorriso]
No full textIn questa analisi del sorriso si è preso in esame il corridoio vestibolare per valutare e quantificare con metodo scientifico la sua presenza e metterla in correlazione con altre strutture.
Obiettivo del lavoro è analizzare i rapporti tra porzione più vestibolare del canino e rima labiale; presenza del corridoio vestibolare, distanza tra la linea mediana incisiva e la rima labiale. È stata effettuata un’analisi statistica dei dati raccolti in un campione di 79 soggetti tra 20 e 25 anni. È risultato negativo il Coefficiente di correlazione di Pearson per la correlazione tra: 1) canino rima labiale - corridoio vestibolare, 2) distanza del piano occlusale dell’incisivo laterale dal piano occlusale dell’incisivo centrale - corridoio vestibolare, 3) corridoio vestibolare - distanza tra la linea mediana e la rima labiale. Si può quindi concludere che sia la distanza dal canino alla rima labiale sia il corridoio vestibolare sono da ritenersi una pura sensazione clinica
Relationship between parafunctional habits, malocclusions and temporomandibular disorders in primary and mixed dentition[Correlazione tra parafunzioni orali, malocclusioni e disordini temporomandibolari in pazienti in dentizione primaria e mista]
No full textObjectives: The aim of this study is to understand the relationships among oral parafunctions (such as tongue thrust and bruxism), malocclusions(monolateral posterior crossbite, deep bite, II Class) and temporomandibular disorders (TMD) and to assess whether these parafunctions may be considered a risk factor in the development of TMD. Materials and methods: Four-hundred twelve children (201 females, 211 male) were examined by the same expert orthodontist. Clinical findings were assessed by a questionnaire including parafunctional habits, malocclusions and TMD symptoms. The results were submitted to descriptive statistical analysis and Fisher's exact test. Results: The results shows that tongue thrust is positively related to TMD in boys (p = 0.023), posterior crossbite is associated with TMD both in boys and girls (p = 0.013; p = 0.05) while Class II malocclusion is linked to TMD in girls only (p = 0.036). Conclusions: The authors conclude that parafunctional habits, with the exception of tongue thrust in boys, are not statistically associated with the presence of signs and/or symptoms of TMD in the sample of children examined in this study. Class II malocclusion in girls and posterior crossbite both in girls and boys are the only malocclusions related to TMD. © 2010 Elsevier Srl. All rights reserved
A comparison of three digital cameras for intraoral photography
No full textThe purpose of this article is to review and compare three digital cameras that are suitable for orthodontic intraoral photography and range in price from 1,000. These models--the Agfa ePhoto 1680, the Nikon Coolpix 950, and the Olympus D-600L--were reviewed according to criteria listed in a previous article1 (Table 1). We also considered ease of use, since this is one of the most important factors in determining whether a digital camera will be used routinely in an orthodontic practice
Morpho-dimensional analysis of the maxillary central incisor clinical crown in cases of congenitally missing upper lateral incisors
No full textAim: the purpose of this study was to analyse the crown morphology of maxillary central incisors in cases of agenesis of the upper lateral incisors, in order to establish patterns of associations between redu- ced mesio-distal dimensions of anterior teeth and tooth abnormalities in number. Materials and methods: the sample consisted of 31 patients with unilateral and bilateral absence of maxillary lateral in- cisors. Ninety six subjects without any agenesis were included in the control group. Mesio-distal widths of each central incisor crown we- re measured by means of 2 parameters; at the apical third of the crown and at the contact point. A Student’s t test was used to compare the results of each measurement within both group. Results: Significant differences were found in mesio-distal diameters at the contact points but not in the mesio-distal diameter at the apical third of the crown. Conclusions: It could be suggested that in case of cases of agene- sis of the lateral incisors the central incisors show a rectangular sha- pe of the crown instead of the trapezoid shape in subjects without age- nesis. These remarks should be considered before the orthodontic-pro- sthetic treatment is planned.
A Olivadoti, T Doldo, M Treccani. Morpho-dimensional analysis of the maxillary central incisor clinical crown in cases of congenitally missing upper lateral incisors. Prog Orthod 2009;10(1):12-19
Distal movement of maxillary canines and premolars with sectional mechanics following Distal Jet application to molars [Utilizzo dei sezionali di arretramento per premolari e canini superiori dopo la distalizzazione molare con Distal Jet]
No full textObjectives: to assess the effectiveness of Distal Jet without simultaneous fixed appliance treatment.
Subjects and methods: twenty subjects with Class II malocclusion who received the Distal Jet appliance to move maxillary molars distally. Subsequently,the canine and premolar distal movements were achieved by the use of .017 x .025 Ni-Ti sectional wires and memory power chain.
Results: revealed that Distal Jet is more effective with less anchorage loss when this appliance is used independent of multibracket appliances.
Conclusion: this study showed that Distal Jet is an effective and predictable appliance. The distal movements of upper premolars, canines and incisors with sectional wires fabricated from .017 x .025 Ni-Ti were biomechanically very effective, simple in clinical application, and did not require any patient compliance
Failure evaluation after a 6-year retention period: a comparison between glass fiber-reinforced (GFR) and multistranded bonded retainers. [Évaluation des échecs après six ans de contention : comparaison des appareils de contention en composite renforcé aux fibres (CRF) et les fils torsades collés]
No full textObjectives: The aim of this study was to compare bond failure and breakage rates of two types of bonded lingual orthodontic retainers (GFR and .0175" multistranded stainless steel wire [MST]) after a 6-year retention period. Subjects and methods: Eighty-five young adults were randomly divided into two groups: 40 subjects received 48 GFR retainers (14 maxillary and 34 mandibular retainers), and 45 subjects received 50 MST retainers (18 maxillary and 32 mandibular retainers). A Fisher's exact test was performed in order to identify significant differences in the percentage of detachment and breakage of the retainers between the groups. Results: The maxillary detachment rates were 21.42% for the GFR group and 22.22% for the MST group; the mandibular detachment rates were 11.76% for the GFR group and 15.62% for the MST group. The maxillary breakage rates were 7.14% for the GFR group and 16.66% for the MST group; the mandibular breakage rates were 8.82% for the GFR group and 15.62% for the MST group. The differences were not statistically significant. Conclusion: GFR and multistranded stainless steel retainers showed similar results in terms of bond failure and breakage after 6 years of retention. The use of GFR retainers as a retention strategy should not be discouraged and could be considered a viable esthetic alternative to stainless steel wire retainers. © 2011 CEO
Corrections of Dental Anomalies in the Maxillary Incisors and Their Influence on Perceived Smile Esthetics: A Systematic Review
Full text linkIntroduction: Dental anomalies present a significant challenge to clinicians due to their impact on both dental function and esthetics. The correction of these anomalies plays a critical role in improving the quality of life of our patients, highlighting the importance of this restorative work. Objective: The purpose of this systematic review is to assess the techniques used to restore various dental anomalies, and their subsequent esthetic impact on the overall dentition. Methods: Inclusion criteria consisted of restorative rehabilitations of the permanent dentition in non-syndromic patients with dental anomalies of morphology, structure, size, and number in the maxillary incisors. Exclusion criteria included surgical rehabilitation techniques, endodontic treatments, and anomalies of the primary dentition. The medical literature was systematically searched (Pubmed, PMC, Embase, Cochrane Central Register of Controlled Clinical trials, Scopus and Google Scholar) to identify all relevant articles reporting data regarding the chosen anomalies. ROBINS-I was used to assess the risk of bias tool, and the results were tabulate due to data heterogeneity. Results: Of the 1821 analyzed articles, 46 articles met the inclusion criteria, and were chosen to go through the final review procedure. Of the selected articles, 3 investigated amelogenesis imperfecta and dentinogenesis imperfecta, 1 analyzed conoid teeth, 1 considered hypodontia (other than MLIA), 3 concerned microdontia (excluding peg laterals and conoid teeth), 10 evaluated peg-shaped laterals, 2 investigated talon cusps and geminated teeth, 15 were regarding maxillary lateral incisor agenesis, and 11 papers were related to the perception of anomalies. Conclusions: Pre-visualization using Digital Smile Design, a treatment plan encompassing minimally invasive restorations, and using a multidisciplinary approach among practitioners helps the anomalous patient achieve the best possible esthetic result
Évaluation des échecs après six ans de contention : comparaison des appareils de contention en composite renforcé aux fibres (CRF) et les fils torsades collés
No full textObjectives: The aim of this study was to compare bond failure and breakage rates of two types of bonded lingual orthodontic retainers (GFR and .0175" multistranded stainless steel wire [MST]) after a 6-year retention period. Subjects and methods: Eighty-five young adults were randomly divided into two groups: 40 subjects received 48 GFR retainers (14 maxillary and 34 mandibular retainers), and 45 subjects received 50 MST retainers (18 maxillary and 32 mandibular retainers). A Fisher's exact test was performed in order to identify significant differences in the percentage of detachment and breakage of the retainers between the groups. Results: The maxillary detachment rates were 21.42% for the GFR group and 22.22% for the MST group; the mandibular detachment rates were 11.76% for the GFR group and 15.62% for the MST group. The maxillary breakage rates were 7.14% for the GFR group and 16.66% for the MST group; the mandibular breakage rates were 8.82% for the GFR group and15.62% for the MST group. The differences were not statistically significant. Conclusion: GFR and multistranded stainless steel retainers showed similar results in terms of bond failure and breakage after 6 years of retention. The use of GFR retainers as a retention strategy should not be discouraged and could be considered a viable esthetic alternative to stainless steel wire retainers. © 2011 CEO
Association between polymorphisms in the IL-1β, TNFRSF11B, CASP1, and IL-6 genes and orthodontic-induced external apical root resorption
Full text linkOrthodontic-induced external apical root resorption (EARR) is a severe condition affecting the roots of the teeth, whose genetic causes have been inconclusive to date. The aim of the present study was to assess the influence of selected single nucleotide polymorphisms (SNPs) IL-1β, TNFRSF11B, CASP1, and IL-6 genes on post-orthodontic EARR. A sample of 101 patients with clearly assessable orthopantomograms and lateral cephalometric radiographs taken before and at the end of the orthodontic treatment was used to evaluate the presence of EARR. The association between genetic polymorphisms and EARR was assessed with the Chi2 test. A binary logistic multi-level model was built to evaluate the ability of patient- and tooth-level variables to predict EARR occurrence. The overall prevalence of EARR resulted to be around 40%. Within the limitations of this study, a significant association was found between EARR presence and the SNP for the IL-1β gene but not for the TNFRSF11B, CASP1, and the IL-6 genes. The final multi-level model demonstrated that the SNP for the IL-1β gene increases the odds of developing EARR by around four times. Since there is currently no accurate method to determine which patients will develop EARR prior to orthodontic treatment, further studies are needed to investigate the predictive ability of further genetic variants on EARR development
“Surgery First” vs “Traditional Sequence” Surgery: A Qualitative Study of Health Experiences in 46 Bimaxillary Orthognathic Patients
No full textIntroduction: Orthognathic patients are advocating an active role in selecting their appropriate ortho-surgical treatment, between the surgery first (SF) and the traditional sequence (TS) approaches. The aim of this study was to evaluate, through qualitative analysis, the subjective perceptions of the outcomes of each protocol. Methods: In-depth interviews were conducted with 46 (10 male and 36 female) orthognathic patients (23 SF and 23 TS) treated with bimaxillary orthognathic surgery by the same surgeon, between 2013 and 2015. Average treatment duration was 6.5 months for SF and 12 months for TS. Inclusion criteria were: the presence of Class III or Class II asymmetries and open bite. Patients were excluded if they refused interviews or stopped attending post-treatment follow-up. Investigated health experiences included overall satisfaction with appearance, self-confidence after surgery, perceived treatment time, functional recovery, and diet restrictions. Results: All SF and TS patients showed overall satisfaction with their appearance (though TS showed more enthusiastic tones) and approved their degree of functional recovery after surgery. Class III SF patients had earlier improvements in self-confidence after surgery. Orthodontics was considered enduring by both SF and TS patients. Conclusions: SF patients expressed a higher degree of satisfaction with the reduction in overall treatment time and with the early psychological benefit deriving therefrom. Both SF and TS patients completely approved of the aesthetic outcomes and the functional recovery from which they benefitted due to the entire procedure
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