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1.
J Clin Pediatr Dent ; 41(6): 486-493, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-29087804

RESUMEN

OBJECTIVE: To compare the effects of extraction, non-extraction and air-rotor stripping treatments on mandibular dental arch dimensions, lower incisor positions and evaluate their effects on the stability of the treatment. STUDY DESIGN: The sample consisted of 44 patients with Class I malocclusion and moderate crowding including 15 patients treated with extraction, 13 with air-rotor stripping (ARS), and 16 with non-extraction treatment. The records were taken at pretreatment (T0), end of active orthodontic treatment (T1), minimum 3 years post-treatment (T2). The model and cephalometric measurements were evaluated. For statistical analyses ANOVA and Welch test was applied. RESULTS: At post-retention period Little's irregularity indices were increased to 1.96 mm, 2.38 mm and 3.59 mm for extraction, ARS and non-extraction groups respectively (p<0.05). At T1-T2, intercanine widths were decreased significantly at all groups (p<0.05). The arch length and arch depth decreased significantly at extraction group (p<0.05) from T0 to T1 and remained the same at T2 (p>0.05). The lower incisors were retroclined with treatment and slightly proclined at post-retention period in extraction group. In ARS and non-extraction group, lower incisors proclined with treatment and remained the same at post-retention. CONCLUSION: At all groups the irregularity indices relapsed but did not return to pretreatment values. Although significant increase at intercanine width was only observed in non-extraction treatment, at post-retention phase, intercanine widths were significantly decreased at all groups. The changes at lower incisor inclinations relapsed slightly in extraction group but remained the same in the other groups.


Asunto(s)
Incisivo , Maloclusión de Angle Clase I/terapia , Ortodoncia Correctiva/métodos , Adolescente , Femenino , Humanos , Masculino , Mandíbula , Estudios Retrospectivos , Extracción Dental
2.
J Oral Sci ; 59(1): 161-164, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28367897

RESUMEN

Skeletal Class III malocclusion with mandibular prognathism is often associated with mandibular asymmetry, and patients with Cl III deformity and asymmetry may undergo orthognathic surgery to improve facial function and esthetics. However, the long-term stability of mandibular setback surgery has been considered "problematic". We report a 25-year-old female patient who was diagnosed as having a skeletal Class III relationship, mandibular asymmetry and unilateral crossbite. She underwent bilateral sagittal split-ramus osteotomy and orthodontic therapy, and this led to improvement of her dentofacial relationship, esthetics and occlusion. The outcome was stable after 8 years of retention. This case shows that asymmetry correction using mandibular setback surgery for skeletal Class III deformity can yield long-term stability.


Asunto(s)
Maloclusión de Angle Clase III/cirugía , Ortodoncia , Osteotomía Sagital de Rama Mandibular , Adulto , Femenino , Humanos
3.
J Orofac Orthop ; 78(2): 153-165, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28084515

RESUMEN

OBJECTIVE: Aim of this retrospective study was to compare soft tissue effects of Class II treatments with the forsus fatigue resistant device (FRD), the pendulum appliance, and the extraction of two maxillary premolars, all of which were combined with pre-adjusted fixed appliances. PATIENTS AND METHODS: The sample of 54 patients with Class II malocclusions was divided in three groups: group I patients (mean age = 15.91 years) were treated with the FRD concurrently used with fixed appliances; group II patients (mean age = 16.08 years) were treated with the pendulum appliance combined with a Nance and headgear followed by fixed appliances; and group III patients (mean age = 19.04 years) were treated with the extraction of two maxillary premolars with miniscrew anchorage. Soft tissue and dentoskeletal parameters were measured on pretreatment (T1) and posttreatment (T2) lateral cephalograms. The changes from T1 to T2 were compared between the groups using Kruskal-Wallis test, and treatment differences were evaluated with the Wilcoxon test at p < 0.05. RESULT: Soft tissue measurement changes related to the upper and lower lips were significantly greater in group II than in group III (p < 0.05). Upper incisor measurement changes were significantly different between groups II and III. Lower incisor measurement changes were significantly different between groups I and III and groups II and III (p < 0.05). CONCLUSIONS: Pendulum and extraction treatment groups showed significant differences in relation with the upper and lower lip positional changes, which were significantly greater in the pendulum group. Treatment time with the extraction treatment was statistically shorter than with the nonextraction protocols.


Asunto(s)
Tejido Conectivo/patología , Aparatos de Tracción Extraoral , Maloclusión de Angle Clase II/diagnóstico , Maloclusión de Angle Clase II/terapia , Métodos de Anclaje en Ortodoncia/instrumentación , Extracción Dental/métodos , Técnicas de Movimiento Dental/instrumentación , Adolescente , Diente Premolar/cirugía , Femenino , Humanos , Masculino , Maloclusión de Angle Clase I , Técnicas de Movimiento Dental/métodos , Resultado del Tratamiento , Adulto Joven
4.
Am J Orthod Dentofacial Orthop ; 149(6): 830-7, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-27241993

RESUMEN

INTRODUCTION: Our objective was to comparatively evaluate different bracket types (conventional, active self-ligating, and passive self-ligating) combined with broad archwires in terms of maxillary dental arch widths and molar inclinations. METHODS: Forty-six patients aged 13 to 17 years with moderate maxillary and mandibular crowding and a Class I malocclusion were included in this prospective clinical trial. The primary outcome measures were changes in maxillary arch width dimensions and molar inclinations. The secondary outcome measures were changes in maxillary and mandibular incisor inclinations. Group I included 15 patients (mean age, 14.4 ± 1.5 years) treated with 0.022-in active self-ligating brackets. Group II included 15 patients (mean age, 14.4 ± 1.6 years) treated with 0.022-in Roth prescription conventional brackets. Group III was a retrospective group of 16 patients (mean age, 14.8 ± 1.0 years) previously treated with 0.022-in passive self-ligating brackets. Each participant underwent alignment with the standard Damon archwire sequence. Whereas the differences among groups were evaluated by 1-way analysis of variance or Kruskal-Wallis tests, the paired-samples t test was applied for intragroup comparisons. For all possible multiple comparisons, the Bonferroni correction was applied to control for type I error. RESULTS: The maxillary intercanine, interpremolar, and intermolar widths were significantly greater after treatment in each bracket group. However, when the levels of expansion achieved among the 3 groups were compared, no significant difference was found. Although all posteroanterior cephalometric variables showed significant changes during treatment in all groups, these changes were not significant among the groups. A statistically significant labial proclination of the teeth was seen in each group. CONCLUSIONS: No differences in maxillary arch dimensional changes or molar and incisor inclination changes were found in conventional and active and passive self-ligating brackets used with broad archwires.


Asunto(s)
Arco Dental/anatomía & histología , Maxilar/anatomía & histología , Soportes Ortodóncicos , Alambres para Ortodoncia , Adolescente , Femenino , Humanos , Masculino , Diente Molar , Diseño de Aparato Ortodóncico , Estudios Prospectivos , Estudios Retrospectivos
5.
Case Rep Dent ; 2016: 3168312, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-27034855

RESUMEN

This case report presents the treatment of a 14-year-and-8-month-old boy with Class II division 2 mandibular retrusion, severe deep bite, and concave profile. The Forsus fatigue resistance device (FRD) was effective in correcting both skeletal and dental parameters. At 5-year posttreatment follow-up, the teeth were well aligned and the occlusion was stable. FRD application with appropriate treatment time can result with prominent changes in the facial profile and dentition, and the outcomes can be maintained at the long-term follow-up periods.

6.
Turk J Orthod ; 29(1): 22-26, 2016 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30112469

RESUMEN

A 26-year, 9-month-old woman had chief complaints of mandibular protrusion and facial asymmetry. Extraoral examination indicated mandibular deviation to the left side, severe facial asymmetry, and a concave profile. Because the patient had a vertical maxillary height difference and an occlusal plane cant together with maxillary retrusion, a differential downgraft and advancement surgery with Lefort I osteotomy was planned. To correct the facial asymmetry and mandibular protrusion, concurrent bilateral sagittal split osteotomy was performed. Double-jaw surgical procedures, including maxillary and mandibular movements, are effective in correcting severe facial asymmetry and skeletal Class III malocclusion.

7.
Cleft Palate Craniofac J ; 51(1): 70-5, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-22849640

RESUMEN

OBJECTIVE: To compare the dental arch relationships of Turkish patients with complete unilateral cleft lip and palate (UCLP) with the results reported for participants in the Eurocleft study. PATIENTS: Study models of 109 patients with complete UCLP from five university clinics in Turkey were evaluated (clinic A = 25 patients, clinic B = 23 patients, clinic C = 20 patients, clinic D = 21 patients, and clinic E = 20 patients). The mean age of the patient cohort was nine years old (range = 8-11 years old), and the cohort was born between 1976 and 1990. METHODS: The examiners rated the three-dimensional (3D) models using the GOSLON Yardstick. The scores were compared with those from the Eurocleft centers: E1(B), E2(E), E3(A), E4(F), E5(C), and E6(D). Intra- and interexaminer agreements were evaluated using weighted kappa statistics. RESULTS: The mean GOSLON scores for the Turkish clinics were as follows: clinic A = 3.16, clinic B = 3.13, clinic C = 3.25, clinic D = 3.67, and clinic E = 3.70. Scores for three of the Turkish clinics (A, B, and C) were significantly worse than the scores for the three best Eurocleft centers, E1(B), E2(E), and E3(A) (P < .001, P < .001, and P < .05, respectively). Scores for two of the Turkish clinics (D and E) were similar to those for Eurocleft center E6(D) but worse than the scores for the other Eurocleft centers (P < .01, P < .001, respectively). CONCLUSIONS: This was the first study in which three-dimensional models were used to derive scores to compare with those of the Eurocleft centers. According to the results of analysis of 109 3D models, 50.4 % of the patients in Turkey were classified as GOSLON score 4 and 5. This may have been attributable to poor surgical procedures, low-volume surgeons, and the decentralized treatment approach in Turkey between 1985 and 2000. Further research is needed to assess the situation in Turkey in more recent years.


Asunto(s)
Labio Leporino/cirugía , Fisura del Paladar/cirugía , Arco Dental/anomalías , Modelos Anatómicos , Niño , Femenino , Humanos , Masculino , Turquia
8.
Angle Orthod ; 84(4): 693-700, 2014 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24328912

RESUMEN

OBJECTIVE: To determine the treatment effects of the Xbow appliance on the upper airway dimensions and volume using cone-beam computed tomography (CBCT); to evaluate the cephalometric changes in the skeletal and dental structures of the skeletal Class II patients. MATERIALS AND METHODS: The sample consisted of 25 Class II patients (11 male, 14 female) with a mean age of 11.1 ± 1.1 years. CBCT images were obtained at the beginning of the treatment (T0) and after the debonding of the Xbow (T1). RESULTS: Changes in superior, middle, and inferior parts of the oropharynx in the retroglossal region and changes in the oropharyngeal airway volume were statistically significant (P < .05, P < .01). The differences favoring the Xbow for the changes in the direction of Class II correction included SNA, SNB, ANB, maxillary depth angles, and point A-NPg and Co-B distances. Data of the dental parameters showed palatal tipping and extrusion of the maxillary incisors, labial tipping of the mandibular incisors, and mesial movement and extrusion of the mandibular molars. CONCLUSIONS: Treatment with the Xbow appliance in Class II patients resulted in favorable increase in the oropharyngeal airway dimensions and volume. Further studies with larger study samples and with control groups are needed.


Asunto(s)
Tomografía Computarizada de Haz Cónico/métodos , Orofaringe/diagnóstico por imagen , Diseño de Aparato Ortodóncico , Técnica de Expansión Palatina/instrumentación , Cefalometría/métodos , Niño , Femenino , Estudios de Seguimiento , Humanos , Incisivo/diagnóstico por imagen , Masculino , Maloclusión de Angle Clase II/diagnóstico por imagen , Maloclusión de Angle Clase II/terapia , Mandíbula/diagnóstico por imagen , Maxilar/diagnóstico por imagen , Diente Molar/diagnóstico por imagen , Hueso Nasal/diagnóstico por imagen , Tamaño de los Órganos , Faringe/diagnóstico por imagen , Estudios Prospectivos , Silla Turca/diagnóstico por imagen , Resultado del Tratamiento
9.
J Contemp Dent Pract ; 14(2): 250-4, 2013 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-23811654

RESUMEN

PURPOSE: To search if the shear bond strengths of brackets would change after two different base-cleaning procedures such as sandblasting or carbide bur cleaning, and to determine if a previously bonded tooth surface had any effect on bond strength. MATERIALS AND METHODS: A total of 120 new brackets were first bonded to 120 extracted premolars and then debonded and bond strength was recorded. The debonded brackets were divided into two groups and recycled either by sandblasting or tungsten-carbide bur cleaning. Sixty recycled brackets were divided into two subgroups: In each group; 30 recycled brackets were bonded to unused 30 extracted premolars. The remaining brackets were bonded to 30 previously used premolars. The brackets were debonded again and their bond strengths were remeasured. RESULTS: Bond strength of rebonded brackets after sandblasting was not significantly different from that of new brackets while the bond strength of rebonded brackets after carbide bur cleaning group significantly decreased. The previously bonded tooth surface did not affect the bond strength significantly. CLINICAL SIGNIFICANCE: This study showed that rebonding the brackets after sandblasting supplies sufficient bond strength. Previously bonded tooth surface did not cause a decreasing effect on bond strength. However, when carbide bur cleaning procedure is chosen, the clinician should proceed cautiously.


Asunto(s)
Recubrimiento Dental Adhesivo , Grabado Dental/métodos , Soportes Ortodóncicos , Grabado Ácido Dental/métodos , Adhesividad , Óxido de Aluminio/química , Diente Premolar/anatomía & histología , Recubrimiento Dental Adhesivo/métodos , Desconsolidación Dental , Equipo Dental de Alta Velocidad , Análisis del Estrés Dental/instrumentación , Equipo Reutilizado , Humanos , Ensayo de Materiales , Ácidos Fosfóricos/química , Cementos de Resina/química , Resistencia al Corte , Estrés Mecánico , Propiedades de Superficie , Compuestos de Tungsteno/química
10.
Lasers Med Sci ; 28(1): 41-7, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-22350425

RESUMEN

The aim of this study is to evaluate the effects of low-level laser therapy (LLLT) on (1) the velocity of orthodontic tooth movement and (2) the nitric oxide levels in gingival crevicular fluid (GCF) during orthodontic treatment. The sample consisted of 20 patients (14 girls, six boys) whose maxillary first premolars were extracted and canines distalized. A gallium-aluminum-arsenide (Ga-Al-As) diode laser was applied on the day 0, and the 3rd, 7th, 14th, 21st, and 28th days when the retraction of the maxillary lateral incisors was initiated. The right maxillary lateral incisors composed the study group (the laser group), whereas the left maxillary lateral incisors served as the control. The teeth in the laser group received a total of ten doses of laser application: five doses from the buccal and five doses from the palatal side (two cervical, one middle, two apical) with an output power of 20 mW and a dose of 0.71 J /cm(2). Gingival crevicular fluid samples were obtained on the above-mentioned days, and the nitric oxide levels were analyzed. Bonferroni and repeated measures variant analysis tests were used for statistical analysis with the significance level set at p ≤ 0.05. The application of low-level laser therapy accelerated orthodontic tooth movement significantly; there were no statistically significant changes in the nitric oxide levels of the gingival crevicular fluid during orthodontic treatment.


Asunto(s)
Terapia por Luz de Baja Intensidad/métodos , Técnicas de Movimiento Dental , Adolescente , Femenino , Líquido del Surco Gingival/metabolismo , Humanos , Incisivo , Láseres de Semiconductores , Masculino , Óxido Nítrico/metabolismo , Aparatos Ortodóncicos , Índice Periodontal
11.
Eur J Orthod ; 35(1): 93-102, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21828357

RESUMEN

The aim of this study was to evaluate the effects of intrusion of the maxillary posterior teeth with zygomatic anchorage on the dentofacial system, on electromyographic (EMG) activity of the masticatory muscles, and on vibration of the temporomandibular joint. The study sample consisted of 19 subjects (13 females, 6 males) with a mean age of 17.7 years. Lateral cephalometric and posteroanterior (PA) radiographs, EMG, and electrovibratographic (EVG) records were obtained before (T0) and after (T1) intrusion. Paired t- and Wilcoxon signed ranks tests were used for statistical evaluation. Maxillary molar intrusion of 3.37 ± 1.21 mm was obtained with a force of 400 g in an average period of 6.84 ± 1.64 months. At T1, all measurements showed that facial growth direction, ANB angle, convexity, and overjet were decreased (P < 0.05). SNB angle, facial depth, and overbite were significantly increased (P < 0.05). Upper lip-E plane distance was increased (P < 0.05). Evaluation of the PA radiographs showed that the right and left molar reference angles were unchanged. EMG and EVG analysis showed that the stomatognathic system at T0 was maintained at T1. Intrusion of the maxillary posterior teeth with zygomatic anchorage is an effective treatment alternative for anterior open bite correction.


Asunto(s)
Electromiografía/métodos , Músculos Masticadores/fisiopatología , Diente Molar , Mordida Abierta/fisiopatología , Articulación Temporomandibular/fisiopatología , Técnicas de Movimiento Dental/métodos , Vibración , Adolescente , Adulto , Cefalometría/métodos , Femenino , Humanos , Masculino , Maloclusión de Angle Clase I/fisiopatología , Maloclusión de Angle Clase I/terapia , Maloclusión de Angle Clase II/fisiopatología , Maloclusión de Angle Clase II/terapia , Maxilar , Mordida Abierta/terapia , Métodos de Anclaje en Ortodoncia , Sistema Estomatognático/fisiopatología , Técnicas de Movimiento Dental/instrumentación , Adulto Joven , Cigoma
12.
J Oral Maxillofac Surg ; 70(2): e133-40, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22260915

RESUMEN

PURPOSE: To investigate 1) the changes in pharyngeal airway sizes associated with maxillary distraction osteogenesis and 2) the correlations between maxillary skeletal variables and the pharyngeal airway in adult patients with cleft lip and palate. PATIENTS AND METHODS: The study was carried out in 14 adult subjects with cleft lip and palate. Predistraction records were taken at a mean age of 22.7 ± 4.6 years. All patients had placement of a rigid external distraction device (RED I; KLS Martin, Tuttlingen, Germany) after Le Fort I osteotomy. Lateral cephalograms were assessed before surgery and at short-term follow-up (8.0 ± 6.4 months). The cephalometric skeletal and pharyngeal airway variables were statistically evaluated by use of the Wilcoxon signed-rank test. Spearman ρ correlation was performed to check the correlations between maxillary skeletal and pharyngeal variables. RESULTS: The maxillary movement was 8.7 mm (P < .01). The maxillary depth angle (+7.9°) and effective maxillary length (9.4 mm) increased significantly (P < .01) after distraction, whereas the palatal plane angle remained unchanged. Anterior nasal spine (8.2 mm) and Posterior nasal spine (6.9 mm) moved anteriorly. The overjet increased (9.5 mm) significantly (P < .01). Posterior, superoposterior, and middle airway spaces increased significantly, with mean differences of 7.5 mm, 5.1 mm, and 3.3 mm, respectively. The soft palate moved anteriorly, with the greatest movement at its superior point. Significant positive correlations were observed for the posterior and superoposterior airway spaces and maxillary movement. PNS changes showed the highest correlation with posterior airway changes. CONCLUSIONS: The significant anterior movement of the maxilla resulted in significant increases in posterior, superoposterior, and middle airway spaces. The posterior airway space showed the highest significant positive correlation with the movement of PNS. The posterior and superoposterior airway spaces also showed significant positive correlations with the maxillary skeletal variables.


Asunto(s)
Labio Leporino/cirugía , Fisura del Paladar/cirugía , Maxilar/cirugía , Osteogénesis por Distracción/métodos , Faringe/patología , Adolescente , Adulto , Cefalometría/métodos , Epiglotis/patología , Fijadores Externos , Femenino , Estudios de Seguimiento , Humanos , Masculino , Mandíbula/patología , Maxilar/patología , Hueso Nasal/patología , Osteogénesis por Distracción/instrumentación , Osteotomía Le Fort/métodos , Paladar (Hueso)/patología , Paladar Blando/patología , Estudios Retrospectivos , Hueso Esfenoides/patología , Adulto Joven
13.
J Craniofac Surg ; 22(4): 1471-5, 2011 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-21772154

RESUMEN

The aim of the study was to obtain anatomic bone healing and restoration of the patient's premorbid occlusion in complex facial fractures or comminuted facial fracture. Ten patients who applied to a tertiary health care clinic with complex or comminuted fractures, and mandibular fractures combined with condylar fractures which may impair the occlusal harmony were included in the study.After the preparation of premorbid occlusal splints and direct bonded orthodontic brackets, splint-assisted reduction and internal fixation have been performed. The treatment protocol was completed with 4 to 6 weeks of intermaxillary fixation over the splint. All fracture lines showed complete bone healing, without major complications requiring further treatment. Complications included a minor degree of malocclusion in one of the panfacial fracture patients and slight avascular resorption of the condyle in one of the avulsive open comminuted mandibular fracture patients.Using orthodontic splints and direct bonded brackets to obtain and maintain delicate reduction is an efficacious method for the prevention of occlusal disharmony and aesthetic impairments in comminuted lower facial unit and complicated facial fracture patients.


Asunto(s)
Huesos Faciales/lesiones , Fracturas Conminutas/cirugía , Ferulas Oclusales , Soportes Ortodóncicos , Fracturas Craneales/cirugía , Adolescente , Adulto , Anciano , Placas Óseas , Resorción Ósea/etiología , Tornillos Óseos , Femenino , Estudios de Seguimiento , Fijación Interna de Fracturas/instrumentación , Curación de Fractura/fisiología , Fracturas Abiertas/cirugía , Humanos , Técnicas de Fijación de Maxilares/instrumentación , Masculino , Maloclusión/etiología , Cóndilo Mandibular/lesiones , Cóndilo Mandibular/patología , Cóndilo Mandibular/cirugía , Enfermedades Mandibulares/etiología , Fracturas Mandibulares/cirugía , Persona de Mediana Edad , Complicaciones Posoperatorias , Estudios Prospectivos , Adulto Joven
14.
Eur J Dent ; 5(3): 318-23, 2011 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-21769274

RESUMEN

OBJECTIVES: The aim of this study was to determine the prevalence of apical root resorption in maxillary incisors during the initial stages of active orthodontic treatment and to test the hypothesis that root resorption increases with the progress of the treatment. METHODS: The study sample consisted of 80 teeth of 20 patients (14 female, 6 male) with a mean age of 14.9±2.8 years. Root resorption was determined with standardized digitized periapical radiographs. All the periapical radiographs were obtained at the beginning of orthodontic treatment (T0) and 3 months (T1), 6 months (T2) and 9 months (T3) after the beginning of the treatment by a paralleling device. They were digitalized as 600 dpi with a flatbed scanner and analyzed by software for image analysis at 400x magnification utilizing a personal computer. RESULTS: All of the 4 maxillary incisors had an increasing amount of resorption during the 9-month period. The amount of root resorption between the time intervals was statistically significant (P<.05). CONCLUSIONS: Root resorption of maxillary incisors can be detected in the early stages of orthodontic treatment and appears to be related to treatment duration. According to 9-month evaluation period, apical root resorption is of limited clinical significance for the average orthodontic patient.

15.
Angle Orthod ; 81(4): 639-46, 2011 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-21299407

RESUMEN

OBJECTIVE: To describe the dentoskeletal and soft tissue effects of facemask treatment anchored with miniplates after alternate rapid maxillary expansions and constrictions (Alt-RAMEC) in maxillary retrusion patients. MATERIALS AND METHODS: The sample consisted of 15 patients with a mean skeletal age of 11.6 ± 1.59 years undergoing 8 weeks of Alt-RAMEC followed by maxillary protraction. Three hundred fifty to 400 g of force per side was applied to the facemask from the titanium miniplates inserted on the lateral nasal wall of the maxilla. Total treatment time was 9.9 ± 2.63 months. Treatment changes were evaluated cephalometrically and analyzed by means of the dependent t-test and the Wilcoxon signed rank test. RESULTS: The miniplates withstood the orthopedic forces exerted during the treatment. Cephalometric findings showed that the maxilla moved forward by 2 mm, with an 0.8° counterclockwise rotation and without maxillary incisor movement. The mandible moved slightly in a downward and backward direction (1.2°). The inclinations of the mandibular incisors decreased significantly (2°). Statistically significant increases were observed in the vertical dimension (1°-1.3°). Soft tissue changes were more marked in the upper lip and soft tissue pogonion than in the lower lip. CONCLUSIONS: This treatment approach can offer an advantage for correcting mild/moderate maxillary retrusion in Class III patients.


Asunto(s)
Aparatos de Tracción Extraoral , Maloclusión de Angle Clase III/terapia , Métodos de Anclaje en Ortodoncia/instrumentación , Técnica de Expansión Palatina , Retrognatismo/terapia , Placas Óseas , Cefalometría , Niño , Femenino , Humanos , Masculino , Maloclusión de Angle Clase III/cirugía , Maxilar/cirugía , Procedimientos Quirúrgicos Ortognáticos , Proyectos Piloto , Estudios Prospectivos , Retrognatismo/cirugía , Estadísticas no Paramétricas , Dimensión Vertical
16.
Angle Orthod ; 80(4): 482-9, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20482352

RESUMEN

OBJECTIVE: To determine the reliability of the reference distances used for photogrammetric assessment. MATERIALS AND METHODS: The sample consisted of 100 subjects with mean ages of 22.97 +/- 2.98 years. Five lateral and four frontal parameters were measured directly on the subjects' faces. For photogrammetric assessment, two reference distances for the profile view and three reference distances for the frontal view were established. Standardized photographs were taken and all the parameters that had been measured directly on the face were measured on the photographs. The reliability of the reference distances was checked by comparing direct and indirect values of the parameters obtained from the subjects' faces and photographs. Repeated measure analysis of variance (ANOVA) and Bland-Altman analyses were used for statistical assessment. RESULTS: For profile measurements, the indirect values measured were statistically different from the direct values except for Sn-Sto in male subjects and Prn-Sn and Sn-Sto in female subjects. The indirect values of Prn-Sn and Sn-Sto were reliable in both sexes. The poorest results were obtained in the indirect values of the N-Sn parameter for female subjects and the Sn-Me parameter for male subjects according to the Sa-Sba reference distance. For frontal measurements, the indirect values were statistically different from the direct values in both sexes except for one in male subjects. The indirect values measured were not statistically different from the direct values for Go-Go. The indirect values of Ch-Ch were reliable in male subjects. The poorest results were obtained according to the P-P reference distance. CONCLUSIONS: For profile assessment, the T-Ex reference distance was reliable for Prn-Sn and Sn-Sto in both sexes. For frontal assessment, Ex-Ex and En-En reference distances were reliable for Ch-Ch in male subjects.


Asunto(s)
Cefalometría , Cara/anatomía & histología , Fotogrametría , Análisis de Varianza , Cefalometría/normas , Interpretación Estadística de Datos , Femenino , Humanos , Masculino , Fotograbar , Valores de Referencia , Reproducibilidad de los Resultados , Factores Sexuales , Adulto Joven
17.
J Oral Maxillofac Surg ; 68(2): 254-9, 2010 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-20116692

RESUMEN

PURPOSE: To evaluate skeletal and dental stability in adult cleft lip and palate patients treated with a rigid external distraction system at the end of distraction and during the postdistraction period. PATIENTS AND METHODS: Lateral cephalograms of 7 patients were obtained before distraction, at the end of distraction, and during the postdistraction period. The mean age before distraction was 21.56 +/- 4.73 years. The mean follow-up was 37.3 +/- 12.4 months. RESULTS: The assessment of findings showed that skeletal maxillary sagittal movement was achieved in a superoanterior direction. The maxillary depth angle and effective maxillary length increased significantly (2 degrees and 9 mm, respectively) after distraction, whereas the palatal plane angle increased by 8 degrees , resulting in an anterior movement of the maxilla with a counterclockwise rotation. The lower facial height showed no significant changes after distraction. The sagittal movement of the upper incisors and the angulation of the upper first molars increased significantly (4.5 mm and 5.5 degrees , respectively). During the postdistraction period, the maxilla showed a slight relapse (22%). The effective maxillary length decreased by 2 mm. The palatal plane angle almost returned to its original position, showing 7 degrees of clockwise rotation. The lower facial height remained stable. The upper incisors moved anteriorly and the upper first molars showed a significant mesioangular change during follow-up. CONCLUSIONS: After distraction, significant maxillary advancement was achieved with a counterclockwise rotation. The upper incisors moved labially, and the upper first molars angulated mesially. After 3 years, a 22% relapse rate was seen in the maxilla. The counterclockwise rotation of the maxilla was returned to its original position. The upper incisors moved more anteriorly.


Asunto(s)
Fisura del Paladar/cirugía , Maloclusión de Angle Clase III/cirugía , Maxilar/cirugía , Osteogénesis por Distracción , Adolescente , Adulto , Cefalometría , Labio Leporino/cirugía , Fijadores Externos , Femenino , Humanos , Masculino , Osteogénesis por Distracción/instrumentación , Osteotomía Le Fort/instrumentación , Osteotomía Le Fort/métodos , Estudios Prospectivos , Recurrencia , Técnicas de Movimiento Dental , Adulto Joven
18.
J Clin Pediatr Dent ; 33(4): 279-82, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19725231

RESUMEN

Inversion of premolars is an extremely rare condition, which usually requires extraction. This case report describes the inversion of an impacted maxillary second premolar in an 11-year-old male, and the multidisciplinary treatment approach for bringing the tooth into a normal position within the arch. In order to provide sufficient space for surgical reimplantation of the tooth, the mesially-drifted neighbouring maxillary first molar was first endodontically treated, followed by orthodontic distalization of the tooth. The inverted tooth was removed surgically and reimplanted without the use of splints for stabilization. After a 12-month follow-up period, the tooth maintained its vitality without any root resorption. Reimplantation of impacted inverted premolars can be a viable treatment alternative to extraction.


Asunto(s)
Diente Premolar/lesiones , Reimplante Dental , Niño , Humanos , Masculino , Maxilar , Grupo de Atención al Paciente , Técnicas de Movimiento Dental , Diente Impactado/cirugía
19.
J Craniofac Surg ; 18(4): 740-7, 2007 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-17667659

RESUMEN

Stereolithographic (medical rapid prototyping) biomodeling allows three-dimensional computed tomography to be used to generate solid plastic replicas of anatomic structures. Reports in the literature suggest that such biomodels may have a use in maxillofacial surgery, craniofacial surgery, orthopedics, neurosurgery, otology, vascular, and nasal research. A prospective trial to assess the usefulness of biomodeling in orthognathic surgery has been performed. In 12 patients with mandibular prognathism and/or maxillary retrusion, in addition to routine preoperative cephalometric analysis, preoperative high-resolution (cutting slice thickness of 1 mm) three-dimensional computed tomography scan of the patients was obtained. Raw data obtained from computed tomography scanning was processed with a Mimics 9.22 Software (Materialise's Interactive Medical Image Control System, Belgium). Fabrication of three-dimensional medical models was obtained through a process called powder depositional modeling by use of a Spectrum Z 510 3D Color Printer (Z Corporation, Burlington, MA). Alveolar arches of the maxilla and mandibula of the models were replaced with orthodontic dental cast models. Temporomandibular joints of the models were fixed with Kirschner wire. Maxillary and mandibular bony segments were mobilized according to preoperative orthodontic planning done by analysis of cephalometric plain radiographs. The relation between proximal and distal mandibular segments after bilateral sagittal split osteotomies were evaluated on models preoperatively. The same surgeon had a role in both model cutting preoperatively and as an instructor preoperatively. The same bony relation was observed both in preoperative modelsand in the perioperative surgical field in all patients. Condylar malpositioning was not observed in any of the patients. Studying preoperative planned movements of osteotomized bone segments and observing relations of osteotomized segments of mandibula and maxilla in orthognathic surgery increased the intraoperative accuracy. Limitations of this technology were manufacturing time and cost.


Asunto(s)
Modelos Anatómicos , Planificación de Atención al Paciente , Prognatismo/cirugía , Adolescente , Adulto , Femenino , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Masculino , Cóndilo Mandibular/fisiopatología , Ferulas Oclusales , Osteotomía Le Fort/métodos , Estudios Prospectivos
20.
J Craniofac Surg ; 18(4): 792-9, 2007 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-17667667

RESUMEN

For better evaluation of long-term results of orthognathic surgery, movements of osteotomized maxillary and mandibular segments should be documented both in x-, y-, and z-axes and in terms of kind of movement (either linear or rotational movements). Lateral cephalometric, anteroposterior cephalometric, and submentovertex radiographs of 14 patients, treated with combined orthodontic and surgical treatment for skeletal class III malocclusion, were reevaluated retrospectively to demonstrate the applicability and usefulness of defined parameters in four maxillary and five mandibular movements. There was no clinically significant relapse in the follow-up period of 6 months in any of the patients. Differences between preoperative and postoperative measurements to demonstrate the linear movement in the z-axis, rotational movements in the x-axis and y-axis of the maxilla, and the linear movement in the z-axis of the mandibula were found to be statistically significant. Differences between early postoperative and late postoperative measurements to demonstrate rotational movement in the y-axis of the maxilla and rotational movement in the y-axis of the mandibula were found to be statistically significant. In this article, the possible tridimensional movements and cephalometric measurements of osteotomized bony segments after LeFort I and sagittal split osteotomy surgery were defined for better evaluation and follow up of the postoperative results.


Asunto(s)
Maloclusión de Angle Clase III/cirugía , Mandíbula/fisiopatología , Maxilar/fisiopatología , Osteotomía Le Fort/métodos , Adolescente , Adulto , Cefalometría , Femenino , Humanos , Masculino , Maloclusión de Angle Clase III/diagnóstico por imagen , Maloclusión de Angle Clase III/fisiopatología , Mandíbula/diagnóstico por imagen , Mandíbula/cirugía , Maxilar/diagnóstico por imagen , Maxilar/cirugía , Radiografía , Recurrencia , Estudios Retrospectivos
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