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1.
Orthod Fr ; 91(1-2): 57-67, 2020 06 01.
Artículo en Francés | MEDLINE | ID: mdl-33146134

RESUMEN

Since 1907, the international community has used Angle's classification to assess the mesio-distal relationships of the dental arches. It is the basis of the diagnosis of malocclusion in the sagittal dimension and indicates or not an orthodontic correction treatment. This work was aimed to inventory the classification methods of malocclusions used today. Indices of treatment need were also presented because they are based on one or more occlusal anomalies to indicate treatment. The classifications were criticized and the contribution of a functional analysis based on the use of the trilogy setting, centering and guiding was detailed. The type of anomalies (skeletal and dental) must be completed by the analysis of the occlusal anomaly of setting (centering or guiding) and of the category of occlusion (functional occlusion, functional malocclusion or pathogenic malocclusion), ie its possible pathogenic impact on orofacial structures. A consensus on the classification of occlusal anomalies is necessary in order to better identify the anomalies and their global repercussions, and to better define the needs for orthodontic treatment.


Asunto(s)
Maloclusión , Oclusión Dental , Humanos , Maloclusión/diagnóstico , Maloclusión/terapia
2.
Prog Orthod ; 21(1): 11, 2020 May 04.
Artículo en Inglés | MEDLINE | ID: mdl-32363550

RESUMEN

BACKGROUND: To compare dentoskeletal changes produced by the maxillary splint headgear and cervical headgear appliance during the early phase of Class II treatment, specially the initial overjet and upper incisors position. SUBJECTS AND METHODS: In this retrospective study, 28 Class II patients treated with the maxillary splint headgear (MSG, mean age 10.1 ± 1.9 years) and 28 Class II patients treated with cervical headgear (CHG, mean age 9.5 ± 1.9 years) were evaluated before and after treatment. Statistical comparisons between the two groups for cephalometric measurements at T1 and for T2-T1 changes were performed by means of independent sample t tests. RESULTS: The MSG showed a significantly greater reduction of the overjet in comparison to the CHG (- 2.4 mm and - 0.7 mm, respectively) and a significantly greater maxillary incisor uprighting (- 1.8 mm and 0.4 mm, respectively). In the MSG, overjet correction was due mainly to mandibular advancement (3.5 mm), while the correction of molar relationship (3.9 mm) was 64% skeletal and 36% dentoalveolar. In the CHG, the overjet correction was also more skeletal, due to mandibular growth (1.8 mm), while correction of molar relationship (3.5 mm) was 63% dentoalveolar and 37% skeletal. CONCLUSIONS: Both groups showed favorable skeletal mandibular changes, which was more significant in the MSG. Regarding tooth movement, the maxillary splint headgear was more effective in uprighting upper incisors and reducing the overjet than cervical headgear appliance.


Asunto(s)
Aparatos de Tracción Extraoral , Maloclusión de Angle Clase II , Cefalometría , Niño , Humanos , Maxilar , Estudios Retrospectivos , Férulas (Fijadores) , Técnicas de Movimiento Dental
3.
Orthod Craniofac Res ; 21(4): 248-257, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30253035

RESUMEN

OBJECTIVES: To compare the three-dimensional maxillary dentoskeletal effects of a modified alternate rapid maxillary expansion and constriction facemask protocol (Alt-RAMEC/FM) with the traditional rapid maxillary expansion facemask protocol (RME/FM) performed in deciduous or early mixed dentition Class III patients. SETTING AND SAMPLE POPULATION: Orthodontic Clinic of the Section of Dentistry of the Department of Surgery and Translational Medicine of the University of Florence. Thirty-four Class III patients were enrolled and allocated by alternating assignment to either Alt-RAMEC/FM or RME/FM therapy. MATERIALS AND METHODS: Prior to treatment, all patients were evaluated, and a cone beam computed tomography (CBCT) scan was acquired. After completion of the orthopaedic therapy (average interval 1.2 years), a follow-up CBCT scan was obtained. Anatomic landmark identification on the CBCTs and subsequent quantification of the changes were performed. The primary outcome variable was the anteroposterior displacement of the anterior nasal spine (ANS AP). The treatment groups were compared with independent samples t tests. RESULTS: The patients in the two treatment groups showed a similar degree of compliance. No statistically significant differences were recorded for any variable when comparing the Alt-RAMEC/FM and RME/FM groups. In particular, the between-group difference for ANS AP was 0.0 mm (95%CI: -0.6;0.7, P = 0.933). CONCLUSIONS: Both Alt-RAMEC/FM and RME/FM produced favourable orthopaedic changes in Class III growing patients. Neither protocol was superior to the other in terms of maxillary protraction effectiveness.


Asunto(s)
Imagenología Tridimensional/métodos , Maloclusión de Angle Clase III/terapia , Maxilar/diagnóstico por imagen , Ortopedia/normas , Puntos Anatómicos de Referencia , Niño , Preescolar , Tomografía Computarizada de Haz Cónico/métodos , Aparatos de Tracción Extraoral , Femenino , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Masculino , Maxilar/anatomía & histología , Diseño de Aparato Ortodóncico , Técnica de Expansión Palatina , Estudios Prospectivos , Técnicas de Movimiento Dental/métodos
4.
Eur J Orthod ; 39(5): 560-566, 2017 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-28057700

RESUMEN

Objective: To evaluate the transverse relationships of the first permanent molars after the correction of posterior crossbite performed during the deciduous dentition with two different treatment protocols. Materials/methods: Ninety patients (40 males and 50 females) with posterior crossbite were treated during the deciduous dentition with either a removable expansion plate (RP group, 60 patients) or rapid maxillary expander (RME group, 30 patients). The dental casts before treatment (T0, mean age 5.1 ± 0.7 years) and after treatment, when the first permanent molars were fully erupted, (T1, mean age 7.7 ± 1.0 years) were analysed. The prevalence rates for posterior crossbite on the first permanent molars in the two groups were compared by means of chi-squared test with Yates correction. A logistic regression was performed to evaluate the factors that could influence the presence/absence of posterior crossbite on the first permanent molars. Results: Prevalence rate of posterior crossbite on the first permanent molars at T1 was 34.4 per cent in the total sample, 28.3 per cent for the RP group and 46.6 per cent for the RME group. No significant predictors for the 'presence/absence of posterior crossbite on the first permanent molars' at T1 were found. Limitations: Retrospective study. Conclusions: After treatment of posterior crossbite during the deciduous dentition phase, the first permanent molars erupted in crossbite in the 34.4 per cent of the cases. The type of treatment is not a significant predictor for the presence of posterior crossbite on the first permanent molars.


Asunto(s)
Maloclusión/terapia , Diente Molar/patología , Técnica de Expansión Palatina , Diente Primario , Niño , Preescolar , Femenino , Humanos , Masculino , Maloclusión/patología , Estudios Retrospectivos , Férulas (Fijadores) , Erupción Dental
5.
Angle Orthod ; 86(6): 1062, 2016 11.
Artículo en Inglés | MEDLINE | ID: mdl-27792425
7.
Eur J Orthod ; 38(1): 51-56, 2016 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-25770942

RESUMEN

OBJECTIVE: To assess the short-term outcomes of splints, Class III elastics, and chincup (SEC III) and rapid maxillary expansion and facial mask (RME/FM) protocols. MATERIALS AND METHODS: 25 patients with Class III dentoskeletal disharmony (10 males, 15 females) treated with the SEC III protocol were evaluated at the beginning (T1, mean age 7.5±1.4 years) and at the end of treatment (T2, mean age 8.7±1.4 years). The SEC III group was compared to a matched sample of 32 Class III patients (16 males, 16 females) treated with the RME/FM protocol and to a matched control group (CG) consisting of 23 subjects (12 males, 11 females) with untreated Class III dentoskeletal disharmony. The statistical comparisons between the three groups were performed with analysis of variance with Tukey's post hoc tests. RESULTS: With respect to the CG the SEC III and the RME/FM groups showed significantly favourable effects in terms of maxillary advancement (SNA +1.2 and +1.4 degrees, respectively), control of mandibular projection (SNB -1.3 and -1.4 degrees, respectively), and intermaxillary relationships (ANB +2.6 and +2.9 degrees, respectively; WITS +3.7 and +2.6mm, respectively). The RME/FM group showed a significantly greater increase in the intermaxillary divergency than the SEC III group (+1.8 degrees) and the CG (+2.0 degrees). LIMITATIONS: A limitation of this study is its short-term nature. CONCLUSIONS: Both SEC III and RME/FM protocols are efficient treatments for Class III dentoskeletal disharmony. The SEC III protocol produces more favourable control in intermaxillary vertical relationships than the RME/FM therapy.


Asunto(s)
Aparatos de Tracción Extraoral , Maloclusión de Angle Clase III/terapia , Técnica de Expansión Palatina/instrumentación , Estudios de Casos y Controles , Cefalometría/métodos , Niño , Protocolos Clínicos , Femenino , Humanos , Masculino , Mandíbula/crecimiento & desarrollo , Maxilar/crecimiento & desarrollo , Cooperación del Paciente , Estudios Retrospectivos , Prevención Secundaria/instrumentación , Prevención Secundaria/métodos , Férulas (Fijadores)
8.
Angle Orthod ; 85(5): 784-9, 2015 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-25786056

RESUMEN

OBJECTIVE: To compare the dentoskeletal changes produced by the Twin-block appliance (TB) followed by fixed appliances vs the Forsus Fatigue Resistant Device (FRD) in combination with fixed appliances in growing patients having Class II division 1 malocclusion. MATERIALS AND METHODS: Twenty-eight Class II patients (19 females and 9 males; mean age, 12.4 years) treated consecutively with the TB followed by fixed appliances were compared with a group of 36 patients (16 females and 20 males; mean age, 12.3 years) treated consecutively with the FRD in combination with fixed appliances and with a sample of 27 subjects having untreated Class II malocclusion (13 females and 14 males; mean age, 12.2 years). Mean observation interval was 2.3 years in all groups. Cephalometric changes were compared among the three groups by means of ANOVA and Tukey's post hoc tests. RESULTS: The FRD produced a significant restraint of the maxilla compared with the TB and control samples (SNA, -1.1° and -1.8°, respectively). The TB sample exhibited significantly greater mandibular advancement and greater increments in total mandibular length than either the FRD or control groups (SNB, 1.9° and 1.5°, respectively; and Co-Gn, 2.0 mm and 3.4 mm, respectively). The FRD produced a significantly greater amount of proclination of the mandibular incisors than what occurred with the TB or the control samples (2.9° and 5.6°, respectively). CONCLUSION: The TB appliance produced greater skeletal effects in terms of mandibular advancement and growth stimulation while the Forsus caused significant proclination of the mandibular incisors.


Asunto(s)
Cefalometría/métodos , Maloclusión de Angle Clase II/terapia , Diseño de Aparato Ortodóncico/instrumentación , Diseño de Aparato Ortodóncico/métodos , Adolescente , Femenino , Humanos , Masculino
9.
Angle Orthod ; 85(6): 927-33, 2015 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-25551427

RESUMEN

OBJECTIVE: To evaluate the dentoskeletal short-term effects of rapid maxillary expansion and facemask therapy (RME/FM) in a sample of Class III patients showing different vertical skeletal relationships. MATERIALS AND METHODS: Seventy-nine patients (35 females and 44 males) having Class III malocclusion were consecutively treated using RME/FM therapy with application of the protraction force in a downward and forward direction and inclination of about 30° to the occlusal plane. All patients were evaluated at the beginning (T1; mean age, 7.7 years) and at the end (T2; mean age, 9.2 years) of orthopedic therapy and divided into three groups according to their vertical skeletal relationships: normal group (NG), hypodivergent group (HypoG), and hyperdivergent group (HyperG). Statistical comparisons between the three groups were performed on the starting forms (T1), the final forms (T2), and the treatment changes (T1-T2) using the ANOVA with Tukey's post hoc tests. RESULTS: Favorable modification in terms of maxillary advancement (changes in SNA ranging from 1.4° to 1.8°) and intermaxillary sagittal skeletal relationships (changes in Wits appraisal ranging from 2.5 mm to 3.5 mm) were recorded in all groups. The three groups showed no statistically significant differences in changes in either sagittal or vertical skeletal variables. CONCLUSIONS: The various vertical skeletal features do not influence the short-term outcomes of RME/FM therapy.


Asunto(s)
Técnica de Expansión Palatina , Cefalometría , Niño , Femenino , Humanos , Masculino , Maloclusión de Angle Clase III/terapia , Mandíbula/anatomía & histología , Maxilar/anatomía & histología , Estudios Retrospectivos , Factores de Tiempo , Resultado del Tratamiento
10.
Prog Orthod ; 14: 12, 2013 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-24326142

RESUMEN

BACKGROUND: The aim of present study was to determine the prevalence of malocclusions, oral habits and the need for orthodontic treatment in a sample of 7- to 15-year-old Albanese schoolchildren. METHODS: The final sample comprised 2,617 subjects (1,257 males and 1,360 females), all orthodontically untreated. Occlusal relationship and the functional analysis were recorded for all subjects. The prevalence rates for the dental health component of the index of orthodontic treatment need (IOTN) were calculated. Comparisons between genders were performed for the prevalence of malocclusions, oral habits and IOTN grades (chi-square tests). RESULTS: Class I, class II and class III malocclusions and asymmetries were observed in 40.4%, 29.2%, 3.2% and 27.1% of the sample, respectively. There were 2,108 subjects (80.6%) that showed oral habits, with females (82.1%) presenting with a greater prevalence rate than males (78.9%). The objective need for orthodontic treatment (grades 4 and 5 of IOTN) was registered in 1,077 subjects (41.2%). This prevalence rate is higher than those reported for other European countries. No significant differences between genders were found for the IOTN grades. CONCLUSIONS: The findings of the present study revealed the need to improve public health plans for orthodontic prevention and screening and to organise the resources in this area in Albania.


Asunto(s)
Hábitos , Indice de Necesidad de Tratamiento Ortodóncico/estadística & datos numéricos , Maloclusión/epidemiología , Adolescente , Albania/epidemiología , Niño , Trastornos de Deglución/epidemiología , Estudios Epidemiológicos , Asimetría Facial/epidemiología , Femenino , Succión del Dedo , Humanos , Masculino , Maloclusión de Angle Clase I/epidemiología , Maloclusión de Angle Clase II/epidemiología , Maloclusión de Angle Clase III/epidemiología , Respiración por la Boca/epidemiología , Obstrucción Nasal/epidemiología , Prevalencia , Factores Sexuales , Trastornos del Habla/epidemiología
11.
Am J Orthod Dentofacial Orthop ; 142(1): 75-82, 2012 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-22748993

RESUMEN

INTRODUCTION: The aim of this prospective clinical trial was to compare the outcomes of prepubertal vs pubertal treatment of deepbite patients with a protocol including biteplane and fixed appliances. METHODS: A sample of 58 subjects with deepbite completed the study. A total of 34 subjects received treatment with removable biteplane appliances in the mixed dentition at a prepubertal stage of skeletal maturation (early treatment group), and 24 subjects were treated at a pubertal stage of skeletal maturation in the permanent dentition (late treatment group). All subjects of both groups were reevaluated after an average period of 15 months after the completion of fixed appliance therapy. Treatment outcomes were assessed statistically after a phase with removable biteplane appliances and at the posttreatment observation. RESULTS: Treatment duration was significantly shorter in the early treatment group than in the late treatment group. Overbite reduction was significantly greater in the late treatment group (-3.1 mm) than in the early treatment group (-1.4 mm). In the late treatment group, 92% of the patients had a corrected overbite 1 year after therapy. CONCLUSIONS: Treatment of deepbite at puberty in the permanent dentition leads to significantly more favorable outcomes than treatment before puberty in the mixed dentition.


Asunto(s)
Sobremordida/terapia , Pubertad/fisiología , Adolescente , Desarrollo Óseo/fisiología , Cefalometría/métodos , Niño , Dentición Mixta , Aparatos de Tracción Extraoral , Femenino , Estudios de Seguimiento , Humanos , Incisivo/patología , Masculino , Maloclusión de Angle Clase I/terapia , Maloclusión de Angle Clase II/terapia , Mandíbula/patología , Cóndilo Mandibular/patología , Maxilar/patología , Hueso Nasal/patología , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos Removibles , Soportes Ortodóncicos , Retenedores Ortodóncicos , Paladar (Hueso)/patología , Estudios Prospectivos , Silla Turca/patología , Factores de Tiempo , Resultado del Tratamiento , Dimensión Vertical
12.
Am J Orthod Dentofacial Orthop ; 140(4): 493-500, 2011 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-21967936

RESUMEN

INTRODUCTION: The aim of this prospective controlled study was to evaluate the long-term effects of rapid maxillary expansion and facemask therapy in Class III subjects. METHODS: Twenty-two subjects (9 boys, 13 girls; mean age, 9.2 years ± 1.6) with Class III disharmony were treated consecutively with rapid maxillary expansion and facemask therapy followed by fixed appliances. The patients were reevaluated at the end of the 2-phase treatment (mean age, 14.5 years ± 1.9) and then recalled about 8.5 years after the end of rapid maxillary expansion and facemask treatment (mean age, 18.7 years ± 2.1). Two groups of controls with untreated Class III malocclusion were used for statistical comparisons of the short-term and long-term intervals. Statistical comparisons were performed with the Mann-Whitney U test. RESULTS: In the long term, no significant differences in maxillary changes were recorded, whereas the treatment group showed significantly smaller increases in mandibular protrusion. The sagittal maxillomandibular skeletal variables maintained significant improvements in the treatment group vs the control groups. CONCLUSIONS: In the long term, rapid maxillary expansion and facemask therapy led to successful outcomes in about 73% of the Class III patients. Favorable skeletal changes were mainly due to significant improvements in the sagittal position of the mandible.


Asunto(s)
Aparatos de Tracción Extraoral , Maloclusión de Angle Clase III/terapia , Técnica de Expansión Palatina , Estudios de Casos y Controles , Cefalometría/métodos , Niño , Femenino , Estudios de Seguimiento , Humanos , Estudios Longitudinales , Masculino , Maloclusión de Angle Clase III/patología , Mandíbula/patología , Maxilar/patología , Hueso Nasal/patología , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos , Retenedores Ortodóncicos , Técnica de Expansión Palatina/instrumentación , Cooperación del Paciente , Estudios Prospectivos , Silla Turca/patología , Resultado del Tratamiento
13.
Angle Orthod ; 81(6): 945-52, 2011 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21801005

RESUMEN

OBJECTIVE: The objective of this prospective controlled study was to assess the outcomes of two-phase treatment of deepbite patients revaluated at the end of circumpubertal growth, 1 year after the end of a phase-2 treatment. MATERIALS AND METHODS: A sample of 58 subjects with deepbite (mean age 9.7 years, overbite greater than 4.5 mm) was treated consecutively with a two-phase protocol. Lateral cephalograms were taken before treatment (T1), at the completion of phase 1 (T2), and 1 year after the completion of phase 2 with fixed appliances (T3, mean age 15.8 years). The T1-T2, T2-T3, and T1-T3 changes were compared with those of the 29 subjects (mean age at T1 = 9.1 years) with untreated deepbite (t-tests for independent samples). Prevalence rates for improved overbite during the T1-T3 interval and for corrected overbite at T3 were contrasted in the treated vs untreated groups (z tests on proportions). RESULTS: Overbite was reduced by 1.9 mm in the treated group as a result of overall treatment; this group also displayed a significant reduction in the interincisal angulation (-6.6°) due to a significant proclination of upper incisors (4.1°) and a significant increase in the projection of the lower incisors (2.0 mm). CONCLUSIONS: The average amount of deepbite correction 1 year into retention was modest, and it was mainly due to a significant proclination of the incisors. The prevalence rate of subjects with a corrected overbite in the treated sample at T3 (74%) was not significantly different from that of the untreated sample (52%).


Asunto(s)
Ortodoncia Correctiva/instrumentación , Ortodoncia Correctiva/métodos , Sobremordida/terapia , Estudios de Casos y Controles , Cefalometría , Niño , Dentición Mixta , Análisis Discriminante , Femenino , Humanos , Masculino , Aparatos Ortodóncicos , Pronóstico , Estudios Prospectivos , Resultado del Tratamiento
14.
Angle Orthod ; 81(4): 678-83, 2011 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-21299410

RESUMEN

OBJECTIVE: To assess the dental, skeletal, and soft tissue effects of comprehensive fixed appliance treatment combined with the Forsus Fatigue Resistant Device (FRD) in Class II patients. MATERIALS AND METHODS: Thirty-two Class II patients (mean age 12.7 ± 1.2 years) were treated consecutively with the FRD protocol and compared with a matched sample of 27 untreated Class II subjects (mean age 12.8 ± 1.3 years). Lateral cephalograms were taken before therapy and at the completion of comprehensive therapy. The mean duration of comprehensive treatment was 2.4 ± 0.4 years. Statistical comparisons were carried out with the Student's t-test (P < .05). RESULTS: The success rate was 87.5%. The FRD group showed a significant restraint in the sagittal skeletal position of the maxilla (also at the soft tissue level), a significant increase in mandibular length, and a significant improvement in maxillo-mandibular sagittal skeletal relationships. The treated group exhibited a significant reduction in overjet and a significant increase in molar relationship. The lower incisors were significantly proclined and intruded, while the lower first molars moved significantly in a mesial and vertical direction. CONCLUSIONS: The FRD protocol is effective in correcting Class II malocclusion with a combination of skeletal (mainly maxillary) and dentoalveolar (mainly mandibular) modifications.


Asunto(s)
Maloclusión de Angle Clase II/terapia , Diseño de Aparato Ortodóncico , Aparatos Ortodóncicos Funcionales , Ortodoncia Correctiva/instrumentación , Adolescente , Cefalometría , Niño , Análisis del Estrés Dental , Femenino , Humanos , Masculino , Método Simple Ciego , Resultado del Tratamiento
15.
Eur J Orthod ; 33(1): 84-92, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-20639280

RESUMEN

The purpose of this study was to perform a meta-analysis of articles to verify the mandibular changes produced by the Fränkel-2 (FR-2) appliance during the treatment of growing patients with Class II malocclusions when compared with untreated growing Class II subjects. The literature published from January 1966 to January 2009 was reviewed with search engines. A quality analysis was performed. The effects on primary end points were calculated with random-effect models. Heterogeneity was assessed using Q statistic and investigated using study-level meta-regression. A total of nine articles were identified. The quality of the studies ranged from low to medium. Meta-analysis showed that the FR-2 was associated with enhancement of mandibular body length [0.4 mm/year 95 per cent confidence interval (CI) 0.182-0.618], total mandibular length (1.069 mm/year, 95 per cent CI 0.683-1.455), and mandibular ramus height (0.654 mm/year, 95 per cent CI 0.244-1.064). A consistent heterogeneity among studies was found for all the considered linear measurements. The FR-2 appliance had a statistically significant effect on mandibular growth. Nevertheless, the heterogeneity of the FR-2 effects, the quality of studies, the differences in age, skeletal age, treatment duration, and the inconsistent initial diagnosis seem to overstate the benefits of the FR-2 appliance. An evidence-based approach to the orthodontic outcomes of FR-2 appliance is needed, by selecting and comparing groups of children with the same cephalometric characteristics with and without treatment.


Asunto(s)
Maloclusión de Angle Clase II/terapia , Mandíbula/crecimiento & desarrollo , Aparatos Ortodóncicos Funcionales , Factores de Edad , Cefalometría , Ensayos Clínicos Controlados como Asunto , Arco Dental/crecimiento & desarrollo , Arco Dental/patología , Humanos , Maloclusión de Angle Clase II/fisiopatología , Mandíbula/patología , Ensayos Clínicos Controlados Aleatorios como Asunto , Estudios Retrospectivos , Factores de Tiempo
17.
Eur J Orthod ; 32(1): 49-53, 2010 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-19706641

RESUMEN

The present survey was performed to determine orthodontic treatment need in a large sample (n = 703) of 12-year-old schoolchildren from the southern part of Italy. The sample comprised 331 males (47 per cent) and 372 females (53 per cent), all orthodontically untreated. Two examiners, who had been previously trained in the use of occlusal indices, screened all the schoolchildren. The prevalence rates for the Dental Health Component (DHC) of the Index of Orthodontic Treatment Need (IOTN) as well as for occlusal features (Angle Class, overjet, overbite, crowding, posterior crossbite) were calculated for the total sample. The IOTN grades were statistically compared in the two genders using the chi-square test. The findings indicated that this southern Italian school population showed a rather low prevalence rate for objective need for treatment (grades 4 and 5; 27.3 per cent of the total sample). This prevalence rate is generally lower than those reported in northern and central European countries (Sweden, Germany, and UK) but slightly greater than those in France. No significant differences in the DHC grades of the IOTN were found between genders. Among the occlusal features diagnosed in the subjects examined, a high prevalence rate was found for crowding (45.9 per cent). Moreover, posterior crossbites and Class III malocclusions, which would presumably have benefited from early orthodontic intervention, were still present in 14.2 and 4.3 per cent of the students, respectively.


Asunto(s)
Encuestas de Salud Bucal , Maloclusión/epidemiología , Evaluación de Necesidades , Ortodoncia/estadística & datos numéricos , Adolescente , Distribución de Chi-Cuadrado , Niño , Femenino , Humanos , Italia/epidemiología , Masculino , Maloclusión/clasificación
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