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1.
Niger J Clin Pract ; 23(3): 329-336, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32134031

RESUMEN

Objectives: The aim of this study is to determine the type, frequency, and location of incidental findings in the maxillofacial region in patients undergoing cone beam computed tomography (CBCT) scan for implant treatment.[5]. Methods: In this study, 300 patients who underwent CBCT imaging for implant treatment planning were evaluated retrospectively. Patients were evaluated in four different categories, namely, maxillary sinus pathologies, temporomandibular joint (TMJ) findings, dentoalveolar findings, and soft-tissue calcifications. In maxillary sinus pathologies, we categorized patients by mucosal thickening, polypoidal lesion, air-liquid level, total opacification, oroantral fistula, periapical lesion related with maxillary sinus, antrolith, hypoplasia, and foreign body presence. In the TMJ findings category, we evaluated patients for erosion, osteophyte, sclerosis, flattening, and bifid condyle. For dentoalveolar findings, we looked for the residual root and impacted tooth. In soft-tissue calcifications, we examined patients for tonsillolith, sialolith, lymph node calcification, styloid ligament calcification, carotid artery calcifications, and osteoma cutis. Results: Mucosal thickening was mostly seen in maxillary sinus pathology. One hundred and forty-eight (49.3%) of the patients had at least one TMJ incidental finding. We detected at least one impacted tooth in 17 (5.7%) patients' maxilla and 14 (4.7%) patients' mandibles. The most frequently seen calcification was styloid ligament calcification. There was no statistically significant relationship between the age groups and incidental findings (P > 0.05). Conclusions: Oral radiologists should be aware of incidental findings and evaluate the possibilities of underlying diseases in a comprehensive way, and if there is a concern about the finding, they should refer the patient to the relevant specialist.


Asunto(s)
Tomografía Computarizada de Haz Cónico/métodos , Seno Maxilar/diagnóstico por imagen , Articulación Temporomandibular/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen , Adulto , Femenino , Humanos , Hallazgos Incidentales , Masculino , Maxilar , Seno Maxilar/patología , Persona de Mediana Edad , Fístula Oroantral/diagnóstico por imagen , Enfermedades Faríngeas , Estudios Retrospectivos , Diente Impactado/patología
2.
J Craniofac Surg ; 30(4): 1044-1048, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30839460

RESUMEN

AIM: The etiology of teeth impaction is still not fully understood, despite that cofactors have been considered important to develop such a clinical picture. The aim of the authors' paper was to investigate about facial biotype, about the values of inclination of the upper cuspid axis to the perpendicular to Frankfort-horizontal plane and about the distance "d" of the canine cuspid to occlusal plane: each factor was statistically compared. The authors also performed a comparative analysis on the radicular length of the left and right lateral incisors of subjects with impacted maxillary canine. METHODS: The authors recruited with "cluster sampling" randomization more than 30 patients, then refined to 25 after the application of exclusion criteria. Specific values were carried out by x-rays: the authors calculated both the α and ß angles, the intermaxillary angle, the distance "d" and the inclination of upper cuspid axis to the perpendicular-to-Frankfort-horizontal plane. Spearman rank correlation coefficient or Spearman rho (ρ) was used as statistical methods. RESULTS: The authors' results assessed that the inclination of the upper cuspid axis to the perpendicular-to-Frankfort-horizontal plane showed a statistically significant inverse correlation with the intermaxillary angle. CONCLUSION: The authors' data clearly indicate that hyperdivergence is a key-factor that will certainly support the eruption path of canine cuspid: in this light, the treatment of tooth impaction in hyperdivergent subjects can be considered as predictive for a good prognosis.


Asunto(s)
Diente Canino , Cara/anatomía & histología , Diente Impactado , Adolescente , Adulto , Biometría , Diente Canino/anatomía & histología , Oclusión Dental , Femenino , Humanos , Incisivo/anatomía & histología , Masculino , Maxilar/anatomía & histología , Diente Impactado/patología , Adulto Joven
3.
Mymensingh Med J ; 28(1): 237-240, 2019 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-30755575

RESUMEN

A male patient about 45 years old came to my private clinic "The Dental Aid", Dhanmondi, Dhaka, Bangladesh last year (February 2016) with the complaint of pain at right palatal premolar region. On clinical examination we found the absence of upper left 2nd premolar from the series of dentition but on the right side premolars are present. The oral mucosa was intact and normal in color. There was no caries, dental pocket or any other pathology in the teeth of both jaws. On palpation we found soft area on the right palatal side at the premolar area. We took intraoral peri-apical radiograph and found impacted left 2nd premolar whose crown was encircled by radiolucent area at the palatal side. Here, we present a rare case of transmigrated and impacted left 2nd maxillary premolar associated with dentigerous cyst. The cyst was successfully treated under general anaesthesia by enucleation along with extraction of the involved maxillary transposed and impacted left second premolar.


Asunto(s)
Diente Premolar/diagnóstico por imagen , Quiste Dentígero/cirugía , Diente Primario/patología , Diente Impactado/diagnóstico por imagen , Diente Impactado/cirugía , Bangladesh , Quiste Dentígero/patología , Humanos , Masculino , Maxilar , Persona de Mediana Edad , Extracción Dental , Diente Impactado/patología
4.
Med Oral Patol Oral Cir Bucal ; 24(1): e130-e135, 2019 Jan 01.
Artículo en Inglés | MEDLINE | ID: mdl-30573722

RESUMEN

BACKGROUND: Our purpose was to investigate the relationship between the angulation of mandibular third molars and the thickness of the lingual bone, which can affect the risk of lingual nerve damage during lower third molars surgical extraction. MATERIAL AND METHODS: This study consisted of 104 patients (42 males and 62 females), aged between 18-42 years (24.67 ± 6.11 years). Cone Beam Computed Tomography (CBCT) images were taken for preoperative assessment. The teeth were divided into four groups according to their positions: mesioangular, distoangular, vertical and horizontal. Lingual bone thickness around impacted teeth were measured at three points: cementoenamel junction (CEJ) of the mandibular second molar, mid-root of the impacted third molar, and apex of the impacted third molar root. Two predisposing factors of lingual nerve damage were recorded: lingual bone perforated by the impacted tooth and lingual bone thinner than 1 mm. Additionally, buccolingual angulations of the teeth in each group were measured. Impacted mandibular third molars were removed in usual way. One week after surgery, the patients were evaluated regarding lingual nerve paresthesia. RESULTS: None of the 104 patients experienced paresthesia, including the ones who had teeth with close proximity with lingual nerve. The mean thickness of bone was 1.21±0.63 mm at CEJ of the second molar; 1.25±1.02 mm at the mid-root; and 1.06±1.31 mm at the apex. Horizontally impacted teeth had thinner lingual bone at mid-root level (p=0.016). Buccolingual angulated teeth were more often associated with perforated lingual bone (p=0.002). Buccolingual and mesial/distal angulation had negative correlation with lingual bone thickness (p<0.05). CONCLUSIONS: As the buccolingual and mesiodistal angulations increase, lingual bone thickness decreases. Horizontally impacted teeth seemed to compromise the integrity of the lingual bone more than impacted teeth in other positions. During the surgery, thin or perforated lingual bone may result in displacement of the impacted tooth lingually.


Asunto(s)
Hueso Hioides/anatomía & histología , Tercer Molar/patología , Diente Impactado/patología , Adolescente , Adulto , Femenino , Humanos , Complicaciones Intraoperatorias/epidemiología , Traumatismos del Nervio Lingual/epidemiología , Masculino , Mandíbula , Estudios Prospectivos , Extracción Dental , Diente Impactado/cirugía , Adulto Joven
5.
Int J Paleopathol ; 24: 89-93, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30321770

RESUMEN

OBJECTIVE: The aim of this paper was to analyse the dental remains of an adult male with three impacted canines from the Roman period cemetery in Osijek, Croatia. MATERIALS: The dental remains of an adult male aged 35-45 years at the time of death were analysed. METHODS: Macroscopic analysis of dental remains was accompanied by radiographic examination. RESULTS: The individual also had additional dental pathologies (carious lesion, antemortem tooth loss). A total of 21 permanent teeth were present in maxillae and mandible. Eighteen of them were normal fully erupted dentition, while three were impacted: left maxillary canine and both mandibular canines. The left maxillary and mandibular canines were mesially inclined, and the right mandibular canine was relatively horizontally positioned. CONCLUSION: A case of non-syndrome impaction in which the lack of eruptive force in combination with the unfavorable position of the tooth bud might have resulted in multiple impacted teeth is presented. SIGNIFICANCE: Current clinical knowledge reports low frequency of this anomaly, with maxillary impaction occurring more often than mandibular. Furthermore, canine impaction is even more rarely reported in the archaeological material. The presented case is the only one from the archaeological setting with impaction present both in maxillae and mandible. LIMITATIONS: In modern populations multiple impactions are often associated with various syndromes. Since the majority of syndromes affect soft tissue, their association with impaction cannot be confirmed in archaeological populations.


Asunto(s)
Arco Dental/patología , Mandíbula/patología , Maxilar/patología , Anomalías Dentarias/patología , Diente Impactado/patología , Diente Premolar/patología , Croacia , Historia Antigua , Humanos , Radiografía Panorámica/métodos , Anomalías Dentarias/historia , Erupción Dental , Diente Impactado/historia
6.
Eur J Orthod ; 40(6): 575-582, 2018 11 30.
Artículo en Inglés | MEDLINE | ID: mdl-30500916

RESUMEN

Objectives: To compare parameters related to impacted canines at the cleft versus the normal contralateral side and with non-impacted canines at the cleft side in unilateral cleft lip and palate (UCLP) patients. We also aim to search for possible associated parameters enabling prediction of canine impaction in these patients. Materials and methods: Ninety-five non-syndromic UCLP patients were included and divided into group A (n = 41 patients) with unilateral impacted canines at the cleft side (A1) and spontaneously erupted canines at the non-cleft side (A2) and group B with spontaneously erupted canines at the cleft side (n = 54 patients). Clinical information and radiographic parameters on panoramic radiographs were collected and compared between groups using a generalized linear mixed model, a Mann-Whitney U-test, a Fisher's exact test, and receiver operating characteristic tests. Results: Impaction of the maxillary canine at the cleft side in UCLP patients can be suspected in case of delayed canine root development, a higher vertical position and sector score (P < 0.05) and higher angles between the canine and the midline, as well as between canine and lateral incisor and between first premolar (P < 0.001). Results clearly indicate that the erupting canine position at the cleft side, even when not impacted, is different from the non-cleft side. Conclusion: There is a great risk for canine impaction at the cleft side in UCLP patients when the canine position is more apical than one-third of the root of the adjacent lateral incisor and when the angles between canine and midline and between canine and first premolar are higher than 23.82 and 16.1 degrees, respectively. These associated parameters should have to be studied in a prospective setting to confirm their predictive value.


Asunto(s)
Injerto de Hueso Alveolar/métodos , Labio Leporino/complicaciones , Fisura del Paladar/complicaciones , Diente Impactado/etiología , Diente Premolar/diagnóstico por imagen , Diente Premolar/patología , Labio Leporino/patología , Labio Leporino/cirugía , Fisura del Paladar/patología , Fisura del Paladar/cirugía , Diente Canino/diagnóstico por imagen , Diente Canino/crecimiento & desarrollo , Diente Canino/patología , Femenino , Humanos , Incisivo/diagnóstico por imagen , Incisivo/patología , Lactante , Masculino , Radiografía Panorámica , Estudios Retrospectivos , Erupción Dental , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología
7.
BMC Oral Health ; 18(1): 184, 2018 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-30382922

RESUMEN

BACKGROUND: The aim of this study was to investigate the association between the severity of permanent tooth impaction and a number of predefined factors, including tooth type, age, gender, tooth agenesis, microdontia of maxillary lateral incisor, and retained deciduous predecessors. METHODS: A sample of 2979 dental patients, aged 15 to 40 years, was surveyed by two calibrated examiners for permanent tooth impaction (excluding third molars). On panoramic radiographs, the impacted teeth were initially ranked based on their vertical, horizontal, and angular positions, and the ranking was then analysed for distribution by the predefined factors. To test the age factor, patients were divided into younger (15 to 25 yr) and older (between 25 and 40 yr) age groups. The statistical significance of the ranked vertical, horizontal, and angular positions of impacted teeth by the investigated factors was determined using the Wilcoxon-Mann-Whitney U test. RESULTS: The angular position of the impacted teeth was more severe in the older age group (P = 0.012) and in females (P = 0.018). The maxillary canine had more severe horizontal (P = 0.001) and angular (P = 0.003) impactions in females. Tooth agenesis was associated with less severe horizontal impaction (P = 0.041) in the mandibular second premolar. In addition, microdontia of the maxillary lateral incisor was associated with more severe horizontal impaction in general, and more severe horizontal (P = 0.024) and angular (P = 0.010) impaction of the mandibular second premolar in particular. Finally, our results showed that a retained deciduous predecessor was linked to a less severe vertical impaction of the mandibular second premolar (P = 0.030) and horizontal impaction of the maxillary second premolar (P = 0.037) but more severe angular impaction of the mandibular canine. CONCLUSIONS: This study suggests that the more delayed the treatment, being a female, the presence of maxillary lateral incisor with microdontia, and retained lower deciduous canines might be associated with more severe position of the impacted teeth. Because the severity of tooth impaction would follow different patterns when considering the investigated factors, it is mandatory to include such factors during dental diagnoses and the planning of preventive or interceptive interventions for young patients.


Asunto(s)
Diente Impactado/patología , Adolescente , Adulto , Dentición Permanente , Femenino , Humanos , Masculino , Radiografía Panorámica , Índice de Severidad de la Enfermedad , Diente Impactado/diagnóstico por imagen
8.
Br J Oral Maxillofac Surg ; 56(10): 952-955, 2018 12.
Artículo en Inglés | MEDLINE | ID: mdl-30448357

RESUMEN

Our aim was to assess the association between the angle of impaction of the third molar and the position of the mandibular canal on cone-beam computed tomography (CT). We designed a retrospective study of 100 cone-beam CT images of 173 mandibular third molars that were obtained between January 2012 and December 2015, and recorded the angle of impaction of the third molar, the position of the mandibular canal in relation to the impacted tooth, and the potential contact between the roots of the tooth and the mandibular canal. Most third molars tilted mesially (n=33), while the mandibular canal was positioned below the roots of the third molar in most cases (n=73). Contact between the two was most likely when the mandibular canal was between (RR=1.49; 95% CI 1.27 to 1.75, p<0.001), or to the lingual side (RR=1.49; 95% CI 1.27 to 1.75, p<0.001) of the roots of the tooth. These outcomes indicate a greater likelihood of contact between the canal and the roots when the canal is between, and to the lingual side, of the roots. We found no association between the angle of impaction and the position of the canal. These findings illustrate the importance of surgical planning using complementary imaging tests such as cone-beam CT.


Asunto(s)
Mandíbula/patología , Tercer Molar/patología , Diente Impactado/patología , Adulto , Tomografía Computarizada de Haz Cónico , Femenino , Humanos , Masculino , Mandíbula/diagnóstico por imagen , Nervio Mandibular/diagnóstico por imagen , Nervio Mandibular/patología , Tercer Molar/diagnóstico por imagen , Tercer Molar/cirugía , Radiografía Dental , Estudios Retrospectivos , Diente Impactado/diagnóstico por imagen
9.
Wiad Lek ; 71(7): 1231-1234, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30448789

RESUMEN

OBJECTIVE: Introduction: The most pronounced thinning of the enamel is in the intercuspal fissures of the third molars, which are characterized by a wide variety of shapes and sizes up to the abnormal disruption of their development and teething, which often causes all kinds of clinical complications. The aim: The purpose of the paper was to obtain the data on the structural state of the third molars and identify their most damaged areas in the latent form of dental caries. PATIENTS AND METHODS: Materials and Methods: 10 lower third molars with an intact crown without clear external signs of tooth decay have been examined. The teeth were embedded into epoxy resin, using the "Himkontakt-Epoxy" glue. Upon the completion of full polymerization, the resulting epoxy blocks were cut by the separation disk. Afterwards, the cross-cut ends with the naked tooth tissues were grinded and polished to obtain even unscratched slice, which was subsequently etched in Trilon-B (disodium salt EDTA) with the follow up staining in 1% borax methylene blue solution. Epoxy tooth slices were studied with the light optics in the reflected light using the MBS-9 binocular loupe, equipped with a digital camera adapter. RESULTS: Results: The process of tooth decay is of endogenous origin. The specimen of the third lower molar shows all pathomorphological signs of the latent carious lesions. Impacted lower third molar with deep carious was detected. It is obvious that, being in the subcortical zone of the alveolar ridge of the lower jaw, this abnormally developed tooth could not be exposed to any external effects. CONCLUSION: Conclusions: The microscopic study of the tooth, found in the ovarian dermoid cysts, showed that it was affected by caries that completely excludes the exogenous factors in its origination. We hypothesize that the mechanism of tooth decay directly involves the immune responses, antigens of which are (in certain circumstances) proteins of the dentin and enamel. This is the rationale for introduction into the current nosology the term "carious disease" instead of "dental caries".


Asunto(s)
Caries Dental/diagnóstico , Tercer Molar/patología , Esmalte Dental , Dentina , Humanos , Diente Impactado/patología
10.
Microsc Res Tech ; 81(11): 1241-1245, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30295367

RESUMEN

The purpose of this study was to evaluate the metabolism and epithelial cell proliferation of odontogenic keratocyst (OKC), dentigerous cyst (DC), and unicystic ameloblastoma (UA) by quantifying the nucleolar organizing regions (AgNORs) and Ki-67 protein immunoexpression. Forty-eight cases (16 OKC, 16 DC, and 16 UA) were evaluated retrospectively. The metabolism and epithelial cell proliferation was measured by the Ki-67 positive cell percentage index and by the mean AgNOR count in each group. The Ki-67 and AgNOR counts were significantly higher in OKC comparing to the DC and UA (p < .001). Ki-67 positive cells were observed higher in suprabasal cell layers of OKC with uniform distribution, a few of them were predominantly observed in basal cell layer in DC and UA. The AgNOR count was significantly higher in the OKC basal cell layers and observed throughout the lining epithelium of DC and UA. Ki-67 and AgNOR reinforced the aggressive character of OKC, presenting high metabolism and cellular proliferation compared to DC and UA, possibly due to its more aggressive clinical behavior and high recurrence rate. RESEARCH HIGHLIGHTS: We evidence higher metabolism and epithelial cell proliferation in OKC when compared to UA and DC, supporting its aggressive aspect and its high rate of recurrence. OKC had intense and predominant labeling of Ki-67 on the suprabasal layer unlike UA and DC.


Asunto(s)
Ameloblastoma/patología , Proliferación Celular/fisiología , Quiste Dentígero/patología , Tercer Molar/patología , Quistes Odontogénicos/patología , Diente Impactado/patología , Adulto , Células Epiteliales/metabolismo , Femenino , Humanos , Antígeno Ki-67/análisis , Masculino , Mucosa Bucal/citología , Mucosa Bucal/patología , Región Organizadora del Nucléolo/metabolismo , Estudios Retrospectivos
11.
Am J Orthod Dentofacial Orthop ; 154(4): 477-486, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30268258

RESUMEN

INTRODUCTION: In this study, we aimed to determine the effect of maxillary and mandibular posterior space discrepancies and third molar angulations on the overbite. METHODS: Pretreatment lateral cephalograms of 131 subjects were analyzed. The sample included 83 open-bite and 48 deepbite subjects. A multiple regression analysis was used to evaluate the influence of maxillary and mandibular posterior space discrepancies and third molar angulations (predictor variables) on overbite. Correlations between posterior space discrepancy and third molar angulation, and correlations between predictor variables and dental angulation and height of posterior teeth and incisors were evaluated with the Pearson correlation coefficient. Subgroups with accentuated negative overbite and deepbite (27 open-bite, 37 deepbite) were compared with t tests. RESULTS: The multiple linear regression analysis showed a positive association of the mesial angulation of the mandibular third molar with overbite. Posterior space discrepancy was negatively associated with posterior teeth mesial angulation and dentoalveolar height. However, these associations were weak, with no clinically significant implications. The deepbite subgroup showed significantly greater mesial angulation of the mandibular third molars than did the open-bite subgroup. CONCLUSIONS: There was no clinically significant effect of posterior space discrepancies and third molar angulations on overbite and dental angulation and height of posterior teeth and incisors.


Asunto(s)
Incisivo/anatomía & histología , Maloclusión de Angle Clase II/patología , Tercer Molar/anatomía & histología , Sobremordida , Diente Impactado/complicaciones , Adolescente , Puntos Anatómicos de Referencia , Brasil , Niño , Arco Dental/patología , Femenino , Humanos , Incisivo/patología , Modelos Lineales , Masculino , Mandíbula , Maxilar , Tercer Molar/diagnóstico por imagen , Mordida Abierta , Erupción Dental , Diente Impactado/patología
12.
Am J Orthod Dentofacial Orthop ; 154(4): 495-503, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30268260

RESUMEN

INTRODUCTION: The objective of this study was to compare the maxillary transverse dimensions between subjects with impacted maxillary canines and subjects without canine impactions, with similar vertical and sagittal features. METHODS: In this retrospective study, 86 cone-beam computed tomography images of subjects with impacted maxillary canines (45 unilateral, 41 bilateral) and 67 images of subjects without dental impactions (control group) matched by similar vertical (NSAr, SArGo, ArGoMe) and sagittal (ANB, SNA, APDI) skeletal characteristics, were analyzed. The maxillary width was measured at 4 levels: first molar basal width, first molar alveolar width, first premolar basal width, and first premolar alveolar width. Group comparisons were performed with analysis of variance and post-hoc Scheffé tests. The influence of group features on the transverse dimensions was evaluated by a multiple linear regression analysis. RESULTS: Groups with unilateral and bilateral impacted maxillary canines showed significantly smaller first molar basal widths, first molar alveolar widths, and first premolar alveolar widths compared with the control group (P = 0.030, P <0.001, and P <0.001, respectively). First premolar basal widths were not significantly different among the groups. CONCLUSIONS: Subjects with unilateral or bilateral impacted maxillary canines have smaller maxillary transverse dimensions than do subjects without impaction. Orthodontists should consider the relationship of maxillary width and canine impaction during diagnosis and treatment planning.


Asunto(s)
Tomografía Computarizada de Haz Cónico/métodos , Diente Canino/anomalías , Diente Canino/diagnóstico por imagen , Maxilar/anatomía & histología , Maxilar/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología , Adolescente , Adulto , Factores de Edad , Análisis de Varianza , Puntos Anatómicos de Referencia , Diente Premolar/anatomía & histología , Diente Premolar/diagnóstico por imagen , Cefalometría , Niño , Arco Dental/diagnóstico por imagen , Femenino , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Incisivo/diagnóstico por imagen , Modelos Lineales , Masculino , Diente Molar/anatomía & histología , Diente Molar/diagnóstico por imagen , Estudios Retrospectivos , Factores Sexuales , Técnicas de Movimiento Dental , Adulto Joven
13.
Prog Orthod ; 19(1): 20, 2018 Jul 16.
Artículo en Inglés | MEDLINE | ID: mdl-30009340

RESUMEN

BACKGROUND: The aetiology of the canine displacement still remains controversial. Some authors implicated a deficiency in maxillary width as a local mechanical cause for impacted canines. The aim of the study was to examine whether there is a relationship between impacted maxillary canines, early diagnosed by using panoramic radiographs, and the morphology of the maxilla on 3D model casts. METHODS: The displaced maxillary canines (DMC) group consisted of 24 patients (mean age, 9.1 ± 1.1 years), while the control group consisted of 25 subjects (mean age, 8.7 ± 0.9 years). Seven measurements were calculated on the digital casts of each subject: intermolar width (IMW), arch length (AL), depth of the palatal vault (PVD), available arch space (AAS), the sum of the anterior segments (SAS), the right/affected (R-Af) and left/unaffected (L-Un) available spaces. RESULTS: Both IMW and AL in the DMC group were significantly decreased relative to the control group (P < 0.01), indicating that patients with displaced canines presented a shorter and narrower palate than subjects without eruption problems. Moreover, the values of the SAS and AAS were significantly decreased (P < 0.01) in the DMC group relative to the controls. CONCLUSIONS: The shape of the maxillary arch was narrower and shorter in the displaced maxillary canines group compared with the control group.


Asunto(s)
Diente Canino/patología , Maxilar/patología , Diente Impactado/diagnóstico , Estudios de Casos y Controles , Niño , Diente Canino/diagnóstico por imagen , Arco Dental/diagnóstico por imagen , Arco Dental/patología , Técnica de Colado Dental , Modelos Dentales , Diagnóstico Precoz , Femenino , Humanos , Masculino , Maxilar/diagnóstico por imagen , Radiografía Panorámica , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología
14.
PLoS One ; 13(6): e0199501, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29953473

RESUMEN

This study examined the prevalence, characteristic features, and complications associated with the occurrence of unerupted permanent incisors among children and adolescents attending a university dental teaching hospital. A retrospective review was performed of the clinical records of children and adolescents who attended the Prince Philip Dental Hospital, Hong Kong between 2005 and 2014. All patients who had at least one unerupted permanent incisor tooth were included. A total of 266 subjects with 320 unerupted permanent incisors were identified. The prevalence of unerupted permanent incisors among children and adolescents was 2.0%. Permanent maxillary central incisors (70.6%) were the most commonly affected teeth. The most common cause for unerupted incisors were dilacerations (n = 83, 36.7%) for maxillary central incisors; developmental dental anomalies (n = 22; 30.6%) together with unfavorable root development (n = 22; 30.6%) for maxillary laterals incisors; and abnormal tooth/tissue ratio (n = 11, 50.0%) for mandibular incisors. A majority of unerupted incisors presented with complications the most common being ectopic/displacement/rotation of the unerupted incisors (46.6%), loss of space (36.9%) and midline shift (27.5%). In conclusion, the causes were distinct for different manifestations of unerupted permanent incisors. As the majority of unerupted incisors presented with complications, a systematic and organized method of history taking as well as clinical and radiographic examinations is mandatory in the diagnosis of unerupted permanent incisors.


Asunto(s)
Incisivo , Diente Impactado/epidemiología , Diente Impactado/etiología , Diente no Erupcionado/epidemiología , Adolescente , Niño , Preescolar , Femenino , Humanos , Masculino , Prevalencia , Evaluación de Síntomas , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología , Diente no Erupcionado/diagnóstico por imagen , Diente no Erupcionado/patología
15.
Eur J Orthod ; 40(6): 592-596, 2018 11 30.
Artículo en Inglés | MEDLINE | ID: mdl-29726936

RESUMEN

Objectives: To evaluate the association between maxillary dental arch transverse dimensions, palatal depths, palatal area and volume with buccally displaced canine (BDC) in mixed dentition subjects when compared to non-BDC subjects using laser scanner 3D technology. Materials and methods: Sixty Caucasian subjects, 8-11 years of age (mean, 9.26 ± 1.48 years), were included. In each group (BDC and non-BDC) 30 children were matched. Digital dental casts were obtained using a 3 Shape D700 laser scanner. Intercanine and intermolar widths (cusp and gingival levels), anterior and posterior palatal depth (cusp level), palatal surface area and volume were measured. An independent sample Student's t-test and an ANOVA were undertaken with significance level set as P < 0.05. Results: Intercanine widths at the cusp (1.76 mm; P = 0.020) and the gingival level (1.6 mm; P = 0.006), palatal area (133 mm2; P = 0.021) and volume (790 mm3; P = 0.046) were significantly lower in the BDC compared to the control group. Limitations: A smaller part of the subjects was in late mixed dentition phase. To overcome this limitation a matched control group was used. Some subjects did not have some teeth because of the transition phase which might have had an influence on the dental measurements. However, these subjects were not excluded to avoid introducing a bias. Conclusions: 3D evaluation of the maxillary arch and palate highlighted significant differences between BDC and non-BDC mixed dentition subjects. Maxillary dental arch dimensions and palate morphology may allow early identification and prevention of maxillary canine impaction.


Asunto(s)
Diente Canino/patología , Arco Dental/patología , Paladar (Hueso)/patología , Diente Impactado/patología , Estudios de Casos y Controles , Moldes Quirúrgicos , Niño , Diente Canino/diagnóstico por imagen , Arco Dental/diagnóstico por imagen , Dentición Mixta , Femenino , Humanos , Imagenología Tridimensional , Masculino , Maxilar/diagnóstico por imagen , Maxilar/patología , Odontometría/métodos , Paladar (Hueso)/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen
16.
Oral Maxillofac Surg ; 22(3): 261-266, 2018 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-29796741

RESUMEN

AIM: Aim of the study is to compare the primary and secondary healing after surgical removal of impacted mandibular third molars, in terms of swelling, severity of pain, trismus, and periodontal healing between two types of closure. MATERIALS AND METHODS: A total of 60 patients, divided into two groups randomly: group A, with 30 patients in which primary closure was done; group B, with 30 patients in which secondary closure was done. A comparison between two groups was done in terms of postoperative pain, swelling, trismus at first, third, and seventh postoperative days, and periodontal healing near adjacent second molar after 6 months. RESULTS: The swelling and pain in group A were greater than that in group B, with a statistically significant difference (p < 0.05). Mouth opening is greater in group B compared to group A. There is no significant difference in periodontal healing in between two groups after 6 months. Complication like alveolar osteitis was noted in 1 patient (3.3%) in group B. CONCLUSION: We conclude that secondary closure was better than primary closure in terms of postoperative pain, swelling, and trismus. Irrespective of any closure technique, there is no difference in terms of periodontal healing.


Asunto(s)
Tercer Molar/cirugía , Complicaciones Posoperatorias/prevención & control , Técnicas de Sutura/instrumentación , Extracción Dental/métodos , Diente Impactado/cirugía , Técnicas de Cierre de Heridas/instrumentación , Adolescente , Adulto , Edema/prevención & control , Femenino , Humanos , Masculino , Persona de Mediana Edad , Tercer Molar/patología , Dimensión del Dolor , Dolor Postoperatorio/prevención & control , Diente Impactado/patología , Resultado del Tratamiento , Trismo/prevención & control , Cicatrización de Heridas
17.
Angle Orthod ; 88(4): 416-424, 2018 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-29664332

RESUMEN

OBJECTIVE: To investigate the characteristics of the dental phenotype in patients with cleidocranial dysplasia (CCD) using longitudinal data. MATERIALS AND METHODS: Twelve unrelated Korean CCD patients were observed using a longitudinal series of radiographs and clinical photographs. Statistical analysis was performed on the dental phenotypic data. RESULTS: Although dysplasia of the clavicles, open fontanelle, and wormian bone were observed in all 12 patients, delayed fusion of the mandibular symphysis was found in four patients. One patient did not have a supernumerary tooth (ST). However, 62 STs were found in 11 patients (mean, 5.6 per patient; range of ST emergence, 5 years 6 months-14 years 8 months; developing position, occlusal to the permanent incisors, canines, and premolars and distal and apical to the permanent molars). The mandibular premolar region was the most frequent area of ST development (50.0%, P < .001). All 12 patients showed impacted permanent teeth (IPT), including one patient without ST (mean, 17.8 per patient). Impaction occurred most frequently in the mandibular premolar region and least frequently in the maxillary molar region (93.8% vs 39.6%, P < .01). The ratio of spontaneous eruption of IPT after removal of retained deciduous teeth and/or ST was highest for the maxillary and mandibular incisors (all 54.6%) and lowest for the mandibular canines and premolars (26.7% and 28.9%, respectively); however, the difference was not significant. CONCLUSIONS: The emergence time and development position of ST and the root development of IPT should be considered to determine the timing for the removal of ST and forced eruption of IPT.


Asunto(s)
Displasia Cleidocraneal/patología , Adolescente , Adulto , Niño , Preescolar , Displasia Cleidocraneal/diagnóstico por imagen , Displasia Cleidocraneal/genética , Subunidad alfa 1 del Factor de Unión al Sitio Principal/genética , Suturas Craneales/patología , Humanos , Estudios Longitudinales , Masculino , Mutación/genética , Fenotipo , Fotografía Dental , Radiografía Panorámica , Tomografía Computarizada por Rayos X , Diente Impactado/diagnóstico por imagen , Diente Impactado/patología , Diente Supernumerario/diagnóstico por imagen , Diente Supernumerario/patología , Adulto Joven
18.
Am J Orthod Dentofacial Orthop ; 153(3): 387-395, 2018 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-29501114

RESUMEN

INTRODUCTION: The severity of a palatally impacted canine (PIC) is gauged radiographically on 2-dimensional and 3-dimensional positional components: eg, angulation and height. We hypothesized that the position of a PIC relative to its virtual alignment in the arch is a better indication of impaction severity and treatment requirements. The aims of this research were to evaluate variations in PIC location on 3-dimensional images and to determine positional components associated with impaction severity. METHODS: Linear and angular measurements of 38 PICs from 28 cone-beam computed tomography scans were made on the panoramic, coronal, sagittal, and axial sections. Measurements included angulation of the PIC to the virtually aligned canine, midline, and palatal plane; and distances between cusp tip and apex to various reference planes-eg, occlusal and midpalatal. Statistical assessments comprised t tests for group comparisons based on PIC and virtually aligned canine severity (cutoff at 30°) and Pearson product moment correlations for associations among variables. RESULTS: Angulations of the PIC to the virtually aligned canine were 32.5° ± 15.5° (range, 9°-59°) and 19.6° ± 6.9° and 45.37° ± 9.6°, respectively, in the less severe and more severe groups (P <0.001). Group differences were significant (0.023 

Asunto(s)
Tomografía Computarizada de Haz Cónico/métodos , Diente Canino , Imagenología Tridimensional , Paladar Duro , Diente Impactado/diagnóstico por imagen , Adolescente , Femenino , Humanos , Líbano , Masculino , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Diente Impactado/patología
19.
Angle Orthod ; 88(2): 195-201, 2018 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-29215300

RESUMEN

OBJECTIVES: To evaluate prevalence, distribution, and sexual dimorphism of dental anomalies (DA) among different skeletal malocclusions (SM) and growth patterns (GP) under the hypothesis that specific clinical patterns exist and may indicate common etiological roots. MATERIALS AND METHODS: A total of 1047 orthodontic records of patients older than 8 years were evaluated. The SN-GoGn angle was used to classify GP (hypodivergent, normal, and hyperdivergent), and the ANB angle was used to verify SM (Angle Classes I, II, and III). These assessments were done from lateral cephalometric radiographs. DA were diagnosed using panoramic radiographs by one calibrated investigator. Odds ratios, chi-square, and Student's t-tests were used. RESULTS: Of the subjects, 56.7% were female, with mean age of 16.41 (±10.61) years. The prevalence of DA was 15.7%. Impaction and tooth agenesis were the most prevalent DA, with relative frequencies of 14.4% and 9.7%, respectively. DA were most prevalent in Class III SM (80.8%) and in hypodivergent GP (82.5%), although this was not statistically significant. Tooth agenesis ( P < .01) and microdontia ( P = .025) were significantly more common among hypodivergent GP and Class III SM, respectively. CONCLUSIONS: The results of this study support the idea that DA are preferentially associated with certain patterns of malocclusion.


Asunto(s)
Maloclusión/etiología , Anomalías Dentarias/complicaciones , Adolescente , Adulto , Cefalometría , Niño , Femenino , Humanos , Masculino , Maloclusión/diagnóstico por imagen , Maloclusión/patología , Maloclusión de Angle Clase I/etiología , Maloclusión de Angle Clase I/patología , Maloclusión de Angle Clase II/etiología , Maloclusión de Angle Clase II/patología , Maloclusión de Angle Clase III/etiología , Maloclusión de Angle Clase III/patología , Radiografía Dental , Radiografía Panorámica , Anomalías Dentarias/diagnóstico por imagen , Anomalías Dentarias/patología , Diente Impactado/complicaciones , Diente Impactado/patología , Adulto Joven
20.
Arch Oral Biol ; 83: 214-221, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28806687

RESUMEN

OBJECTIVE: Fluoride excess of 0.05-0.07mgF/kgbw/day in water or food additives like salt is the principal cause of endemic dental fluorosis. How fluoride causes these defects is not clear yet. Recent studies in rodents suggest that development of enamel fluorosis is associated with insufficient neutralization of protons released during the formation of hypermineralized lines. DESIGN: Here we examined whether hypermineralization could also be assessed by MicroCT in developing molar enamel of humans exposed to fluoride. RESULT: Micro-CT analysis of hypomineralized enamel from human fluorotic molars graded by the Thylstrup-Fejerskov (TF) Index as III-IV showed weak hypermineralized lines and hypermineralized patches not seen in TF-I/II grade enamel. The mesio-distal sides of these molar teeth were significantly smaller (∼18%, p=0.02) than in TF-I/II teeth. CONCLUSION: The patterns of changes observed in human fluorotic teeth were similar to those in fluorotic rodent incisors. The data are consistent with the hypothesis that also in developing human teeth fluoride-stimulated local acidification of enamel could be a mechanism for developing fluorotic enamel.


Asunto(s)
Fluorosis Dental/diagnóstico por imagen , Incisivo/diagnóstico por imagen , Diente Molar/diagnóstico por imagen , Desmineralización Dental/diagnóstico por imagen , Diente Impactado/diagnóstico por imagen , Adolescente , Adulto , Animales , Modelos Animales de Enfermedad , Femenino , Fluorescencia , Humanos , Incisivo/patología , Masculino , Ratones , Ratones Endogámicos C57BL , Diente Molar/patología , Desmineralización Dental/patología , Diente Impactado/patología , Microtomografía por Rayos X
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