RESUMEN
OBJECTIVES: The purpose of this study was to quantify the symmetry of the alveolar process of the maxilla and palate during the first year of life in healthy infants with the help of a semiautomatic segmentation technique. MATERIALS AND METHODS: Maxillary plaster models of seventy healthy babies at 0, 3, 6, 9, and 12 months were collected and digitized. A semiautomatic segmentation tool was used to extract the alveolus and palate. The resulting model was aligned within a reference frame and mirrored on its medial plane. Distance maps were created and analyzed to compare and quantify the differences between the two hemispheres. Additional hemispherical width and area measurements were performed. An ANOVA test with additional post hoc tests was performed to check if the symmetry changed during development. Finally, the results were tested on intra- and interobserver variability. RESULTS: The absolute mean inter-surface distance between the original and mirrored models in each age group ranged between 0.23 and 0.30 mm. Width and area analysis showed a small but significant larger left palatal hemisphere. ANOVA and post hoc tests showed no significant difference in symmetry between groups. Reliability analysis showed no significant differences between observers. CONCLUSIONS: This study showed that in this infant population, only a small degree of palatal asymmetry was present, which can be considered as normal and clinically irrelevant. CLINICAL RELEVANCE: The data from this study can be used in future comparative studies as reference data. Furthermore, modeling of these data can help in predicting the growth pattern, which may lead to improved treatment protocols for children with craniofacial anomalies.
Asunto(s)
Fisura del Paladar , Arco Dental , Niño , Humanos , Lactante , Maxilar , Reproducibilidad de los ResultadosRESUMEN
OBJECTIVES: The aim of this study was to develop an accurate and intuitive semi-automatic segmentation technique to calculate an average maxillary arch and palatal growth profile for healthy newborns in their first year of life. MATERIALS AND METHODS: Seventy babies born between 1985 and 1988 were included in this study. Each child had five impressions made in the first year after birth that were digitalized. A semi-automatic segmentation tool was developed and used to assess the maxillary dimensions. Finally, random effect models were built to describe the growth and build a simulation population of 10,000 newborns. The segmentation was tested for inter- and intra-observer variability. RESULTS: The Pearson correlation coefficient for each of the variables was between 0.94 and 1.00, indicating high inter-observer agreement. The paired sample t test showed that, except for the tuberosity distance, there were small, but significant differences in the landmark placements between observers. Intra-observer repeatability was high, with Pearson correlation coefficients ranging from 0.87 to 1.00 for all measurements, and the mean differences were not significant. A third or second degree growth curve could be successfully made for each parameter. CONCLUSIONS: These findings indicated this method could be used for objective clinical evaluation of maxillary growth. CLINICAL RELEVANCE: The resulting growth models can be used for growth studies in healthy newborns and for growth and treatment outcome studies in children with cleft lip and palate or other craniofacial anomalies.
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Maxilar/crecimiento & desarrollo , Labio Leporino , Fisura del Paladar , Arco Dental/crecimiento & desarrollo , Humanos , Lactante , Recién Nacido , Variaciones Dependientes del Observador , Hueso Paladar/crecimiento & desarrolloRESUMEN
OBJECTIVES: The primary aim of the present study was to evaluate the effectiveness of postoperative irrigation of the socket with drinking tap water on inflammatory complications following lower third molar removal. MATERIAL AND METHODS: A multicenter randomized controlled trial was carried out from June 2013 to June 2014. In one arm of the study, patients were instructed to irrigate the tooth socket and surgical site with a Monoject® Curved 412 Tip Syringe (Tyco/healthcare-Kendall, Mansfield, MA, USA) with tap water. In a second arm of the study, the standard postoperative instructions did not include irrigation instructions. The incidences of alveolar osteitis and wound infection were recorded for each group and analyzed by the Fisher's exact test. RESULTS: A total of 280 patients with 333 mandibular third molars were analyzed. According to the intention-to-treat (ITT) analysis, inflammatory complications occurred in 18 cases in the Monoject® group (11.4 %) compared to 34 cases (19.1 %) in the control group (p = 0.04). These complications were associated with significant worse outcomes regarding quality of life, pain, and trismus and caused significantly more missed days of work or study. Female gender, age >26, bone removal, deep impacted third molars, less experienced surgeons, and a high amount of debris at the surgical site were also identified as risk factors for developing inflammatory complications following lower third molar removal. CONCLUSION: Irrigation of the surgical site with drinking tap water using a curved syringe following removal of third molars is effective in reducing the risk of inflammatory complications. CLINICAL RELEVANCE: Water is a very accessible, cost-effective irrigant without side effects and the results from this study have proven that it can be used to reduce the risk of inflammatory complications and associated morbidity following lower third molar removal.
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Agua Potable , Tercer Molar/cirugía , Complicaciones Posoperatorias/prevención & control , Irrigación Terapéutica/métodos , Alveolo Dental , Diente Impactado/cirugía , Adolescente , Adulto , Alveolo Seco/epidemiología , Alveolo Seco/prevención & control , Femenino , Humanos , Masculino , Mandíbula , Dimensión del Dolor , Complicaciones Posoperatorias/epidemiología , Factores de Riesgo , Infección de la Herida Quirúrgica/epidemiología , Infección de la Herida Quirúrgica/prevención & control , Jeringas , Resultado del TratamientoRESUMEN
PURPOSE: The exact quantification of craniofacial characteristics in patients with acromegaly is important because it provides insight in the pathophysiology of the disease and offers a tool to evaluate the effects of treatment on tissue specific endpoints. However, until recently this was not feasible due to limitations of available cephalometric methods. The new technique of three-dimensional (3D) cephalometry enables the accurate quantification of facial anatomical characteristics of both soft tissue and bone. This is the first study that uses 3D cephalometry to analyze craniofacial disproportions in patients in long-term remission of acromegaly. METHODS: Sixteen patients in remission of acromegaly for over 24 months (50% male, mean age 56.0 ± 10.7 years, mean body mass index 29.3 ± 5.5 kg/m(2)) were compared to 16 matched control subjects. A 3D cone beam computed tomography scan and 3D stereophotograph of each individual were acquired and analyzed using 3D cephalometry. RESULTS: In addition to an accurate quantification of the classical craniofacial characteristics, 3D cephalometry, shows that many typical soft tissue deformities persist, even after long-term remission. Furthermore, we found that, compared to controls, the patients in remission of acromegaly have a wider face at the level of the zygoma and longer maxilla (p < 0.05). CONCLUSIONS: 3D cephalometry is an attractive novel imaging modality to accurately investigate craniofacial disproportions of both soft tissue and bony parts of the face in patients with acromegaly, which makes it a promising technique for future research purposes and clinical practice.
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Acromegalia/sangre , Acromegalia/diagnóstico , Cefalometría/métodos , Anciano , Humanos , Factor I del Crecimiento Similar a la Insulina/metabolismo , Masculino , Persona de Mediana EdadRESUMEN
Following the extraction of an incisor in the maxilla, resorption of the -alveolar bone always occurs, especially on the buccal side. This often indicates that in the buccocervical area, insufficient bone is present to cover the dental implant. One treatment option is to carry out a bone transplant on the buccal side prior to or during the placement of the implant. An alternative way of supporting the buccocervical gingival is to leave the buccal part of the radixin situ, the so-called socket-shield technique. The results of this treatment for 16 consecutive patients were evaluated and revealed that the socket-shield technique produces good treatment results.
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Resorción Ósea/terapia , Trasplante Óseo , Implantación Dental Endoósea/efectos adversos , Maxilar/cirugía , Adulto , Anciano , Pérdida de Hueso Alveolar , Proceso Alveolar , Pilares Dentales , Ética Odontológica , Femenino , Humanos , Masculino , Persona de Mediana Edad , Extracción Dental/efectos adversos , Alveolo Dental , Resultado del Tratamiento , Adulto JovenRESUMEN
This study was aimed to assess whether facial asymmetry increases with age and to examine potential gender differences using 3D stereophotogrammetry. A prospective cross-sectional study was performed. 3D photographs were acquired from 600 control subjects, 300 male, 300 female, and were stratified into 15 different age groups ranging from 0 to 70+. The 3D photographs were postprocessed and mirrored. The original and mirrored faces were surface-based matched using an iterative closest point algorithm. The primary outcome variable, facial asymmetry, was evaluated by calculating the absolute mean distance between the original and mirrored images. The primary predictor was age. Pearson's correlation was used to assess the correlation between facial asymmetry and age. The average overall facial asymmetry was 0.72 mm (SD 0.72 mm; range 0.25 - 3.04 mm). Mean facial asymmetry increased significantly with age, from 0.45 mm in the age group of 0-4 years to 0.98 mm in the age group of 70+ (p<0.001). Facial asymmetry was positively correlated with age (Pearson's r = 0.55; p<0.001). Male subjects were significantly more asymmetric compared to females, 0.77 mm and 0.67 mm, respectively (p<0.001). This study indicates that facial asymmetry significantly increases with age and is significantly larger in males than in females.
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Asimetría Facial , Imagenología Tridimensional , Fotogrametría , Humanos , Masculino , Asimetría Facial/diagnóstico por imagen , Asimetría Facial/patología , Femenino , Fotogrametría/métodos , Adulto , Imagenología Tridimensional/métodos , Adolescente , Estudios Prospectivos , Estudios Transversales , Adulto Joven , Niño , Persona de Mediana Edad , Preescolar , Factores de Edad , Anciano , Lactante , Factores Sexuales , Recién NacidoRESUMEN
INTRODUCTION: No studies are available that provide predictive parameters regarding the expected amount of resorption after maxillary sinus augmentation surgery using autologous bone grafts. Therefore, the aim of this study was to determine parameters influencing the outcome of the bone graft resorption process. MATERIAL AND METHODS: In 20 patients, three-dimensional analysis of alveolar ridge dimensions and bone graft volume change in the atrophic posterior maxilla was performed by Cone-Beam Computerized Tomography imaging. Ridge dimensions were assessed before maxillary sinus augmentation surgery. Bone graft volumes were compared after maxillary sinus floor augmentation surgery and a graft healing interval of several months. To analyze the relation between bone volume changes with the independent variables, patients' gender, age, alveolar crest height and width, and graft healing time interval, a multi-level extension of linear regression was applied. RESULTS: A residual bone height of 6.0 mm (SD = 3.6 mm) and 6.2 mm (SD = 3.6 mm) was found at the left and right sides, respectively. Moreover, alveolar bone widths of 6.5 mm (SD = 2.2 mm) and 7.0 mm (SD = 2.3 mm) at the premolars, and 8.8 mm (SD = 2.2 mm) and 8.9 mm (SD = 2.5 mm) at the molars regions were found at the left and right site, respectively. Bone graft volume decreased by 25.0% (SD = 21.0%) after 4.7 months (SD = 2.7, median = 4.0 months) of healing time. The variables "age" (P = 0.009) and mean alveolar crest "bone height" (P = 0.043), showed a significant influence on bone graft resorption. A decrease of 1.0% (SE = 0.3%) of bone graft resorption was found for each year the patient grew older, and an increase in bone graft resorption of 1.8% (SE = 0.8%) was found for each mm of original bone height before sinus floor augmentation. CONCLUSIONS: Graft resorption occurs when using autologous bone grafts for maxillary sinus augmentation. Alveolar crest bone height and patient age have a significant effect on graft resorption, with increased resorption for higher alveolar crest bone height and decreased resorption for older patients. Consequently, patient characteristics that affect the process of bone graft resorption should be given full consideration, when performing sinus augmentation surgery.
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Proceso Alveolar/diagnóstico por imagen , Proceso Alveolar/cirugía , Resorción Ósea/diagnóstico por imagen , Trasplante Óseo/métodos , Tomografía Computarizada de Haz Cónico , Seno Maxilar/diagnóstico por imagen , Seno Maxilar/cirugía , Femenino , Humanos , Modelos Lineales , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Estudios Retrospectivos , Trasplante Autólogo , Resultado del TratamientoRESUMEN
Lymangiomas are congenital malformations of the lymphatic system. They can appear at any age and in any part of the body. In the head and neck area lymangiomas can give rise to functional as well as esthetic problems. Therapy consist of sclerosis, possibly followed by surgical excision. Stereophotogrammetry is a relatively new technique which, by means of superimposition of pre- and postoperative images, provides the possibility to quantify treatment results. In this paper 3 patients who underwent treatment of a lymphatic malformation and in whom treatment results were measured with stereophotogrammetry are discussed. The conclusion can be drawn that stereophotogrammetry is a promising technique for evaluation of treatment results of superficially localised lymphatic malformations that displace the skin in the head and neck area.
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Cabeza/patología , Linfangioma/patología , Cuello/patología , Fotogrametría/métodos , Adolescente , Adulto , Niño , Femenino , Humanos , Linfangioma/diagnóstico , Linfangioma/cirugía , Anomalías Linfáticas , Masculino , Esclerosis/diagnóstico , Esclerosis/patología , Resultado del TratamientoRESUMEN
The aim of this study was to determine the amount of deviation in nasolabial shape in patients with a cleft compared with an average non-cleft face, and to assess whether this difference is related to nasolabial aesthetics. Three-dimensional stereophotogrammetric images of 60 patients with a unilateral cleft were used. To quantify shape differences, four average non-cleft faces were constructed from stereophotogrammetric images of 141 girls and 60 boys. Three-dimensional shape differences were calculated between superimposed cleft faces and the average non-cleft face for the same sex and age group. Nasolabial aesthetics were rated with the modified Asher-McDade Aesthetic Index using a visual analogue scale (VAS). Mean VAS scores ranged from 51.44 to 60.21 for clefts, with lower aesthetic ratings associated with increasing cleft severity. Shape differences were found between cleft faces and the average non-cleft face. No relationship was found for the VAS, age, and sex, except that a lower VAS was related to a higher nose and lip distance between the superimposed cleft and average non-cleft faces for nasal profile (P= 0.02), but the explained variance was low (R2=0.066). In conclusion, except for nasal profile, nasolabial aesthetics were not influenced by the extent of shape differences from the average non-cleft face.
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Labio Leporino , Fisura del Paladar , Estética Dental , Femenino , Humanos , Imagenología Tridimensional , Masculino , NarizRESUMEN
OBJECTIVES: To systematically review the diagnostic accuracy of second-trimester transabdominal ultrasound in detecting orofacial clefts in low- and high-risk populations and to compare two-dimensional (2D) with three-dimensional (3D) ultrasound techniques. METHODS: MEDLINE and EMBASE were searched for articles published in English, Dutch, French or German using the keywords 'cleft' and 'ultrasound' or 'screening' or 'sonogram' and 'prenatal' or 'antenatal' or 'fetus' to identify cohort studies and randomized trials in order to assess the detection rate by prenatal ultrasound of cleft lip and palate in high-risk and low-risk pregnant women. RESULTS: Of 451 citations identified, 27 met the criteria for the systematic review, 21 involving unselected low-risk populations and six involving high-risk populations. In the selected studies there was diversity in the gestational age at which the ultrasound examination was performed and there was considerable variety in the diagnostic accuracy of 2D ultrasound in the low-risk women, with prenatal detection rates ranging from 9% to 100% for cleft lip with or without cleft palate, 0% to 22% for cleft palate only and 0% to 73% for all types of cleft. 3D ultrasound in high-risk women resulted in a detection rate of 100% for cleft lip, 86% to 90% for cleft lip with palate and 0% to 89% for cleft palate only. CONCLUSIONS: 2D ultrasound screening for cleft lip and palate in a low-risk population has a relatively low detection rate but is associated with few false-positive results. 3D ultrasound can achieve a reliable diagnosis, but not of cleft palate only.
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Labio Leporino/diagnóstico por imagen , Fisura del Paladar/diagnóstico por imagen , Ultrasonografía Prenatal/métodos , Labio Leporino/embriología , Fisura del Paladar/embriología , Femenino , Edad Gestacional , Humanos , EmbarazoRESUMEN
OBJECTIVE: To determine the relationship between trisomies 13, 18, and 21 and craniofacial malformations detected by prenatal sonography. DESIGN: During a 29-year period (1976 through 2004), prenatal sonographic findings of 69 fetuses with trisomy 13; 171 fetuses with trisomy 18; 302 fetuses with trisomy 21; and 17 fetuses with other trisomies were evaluated retrospectively, after fetal karyotype identification. Sonographic findings were compared with autopsy results in 209 patients (trisomy 13, n=39; trisomy 18, n=64; and trisomy 21, n=106). RESULTS: For trisomy 13, cleft deformities were detected prenatally in 65.2%, and of the 39 cases with pathological information, 76.9% were found to have a cleft deformity. Ocular and orbital abnormalities were found in 28%. Malformations of the jaws and abnormal profiles were more frequently diagnosed postnatally than prenatally. For trisomy 18, abnormal profiles (41.5%) and ear abnormalities (5.3%) were the most noticeable ultrasound markers, next to abnormalities of the neurocranium (36.8%) and cranial bone configuration (21.6%). Dysmorphisms of the eye, ear, or nose were detected more frequently in autopsy cases. For trisomy 21, ultrasound showed an aberrant shape of the skull in 14.2% of fetuses. In general, the ocular-orbital and nasal abnormalities in fetuses with trisomy 18 or 21 were more evident in pathological examination than in prenatal ultrasound imaging. CONCLUSIONS: Facial anomalies are common in the major trisomies, and their prenatal sonographic identification should be improved. The above-mentioned facial anomalies provide sufficient reason to consider performing cytogenic evaluation.
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Cromosomas Humanos 13-15/genética , Cromosomas Humanos 16-18/genética , Cromosomas Humanos 21-22 e Y/genética , Anomalías Craneofaciales/diagnóstico por imagen , Anomalías Craneofaciales/genética , Anomalías Maxilofaciales/diagnóstico por imagen , Anomalías Maxilofaciales/genética , Trisomía/patología , Ultrasonografía Prenatal , Adulto , Amniocentesis , Autopsia , Cromosomas Humanos 13-15/diagnóstico por imagen , Cromosomas Humanos 16-18/diagnóstico por imagen , Cromosomas Humanos 21-22 e Y/diagnóstico por imagen , Anomalías Craneofaciales/patología , Femenino , Marcadores Genéticos , Edad Gestacional , Humanos , Recién Nacido , Cariotipificación , Masculino , Edad Materna , Anomalías Maxilofaciales/patología , Fenotipo , Estudios Retrospectivos , Cráneo/anomalíasRESUMEN
A 61-years-old woman had macroglossia due to acromegaly with complaints of dyspneu at a lying sleeping position and complaints of speech and dysphagia. At the age of 55 years she was diagnosed with acromegaly induced by a adenoma of the pituitary gland, which had been removed surgically. The treatment of macroglossia included tongue reduction, removal of the remaining mandibular teeth with severe periodontal attachment loss, huge reduction of the residual alveolar ridge, immediate implant insertion, fabrication of implant-supported overdentures, and logopedic treatment. The speech improved significantly and the patient could sleep again in a lying position. Clinically, acromegaly is diagnosed on clinical signs, such as the morphology and the protrusion of the tongue. Often, macroglossia is a secondary symptom of a systemic disease, needing causal treatment. If surgical reduction of the tongue is indicated, also enlargement of the oral cavity should be considered.
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Acromegalia/complicaciones , Macroglosia/etiología , Macroglosia/cirugía , Trastornos de Deglución/etiología , Trastornos de Deglución/cirugía , Disnea/etiología , Disnea/cirugía , Femenino , Humanos , Persona de Mediana Edad , Resultado del TratamientoRESUMEN
A 26-year-old man was suffering from pericoronitis of his mandibular third molars. To determine the position of the mandibular canal in relation to the roots of the third molars, a panoramic radiograph was made. The radiograph revealed at the right side a bifid mandibular canal and the upper part of the canal seemed to be related to the third molar. Additionally, a cone beam CT was made, which revealed a bifid mandibular canal at the left side and a trifid mandibular canal at the right side. Anatomical anomalies of the mandibular canal may have clinical implications, such as an increased risk of injury to the inferior alveolar nerve in case of removing a mandibular third molar and inadequate local anesthetics.
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Nervio Mandibular/diagnóstico por imagen , Tercer Molar/anomalías , Tercer Molar/inervación , Extracción Dental/efectos adversos , Adulto , Tomografía Computarizada de Haz Cónico , Humanos , Hallazgos Incidentales , Masculino , Mandíbula/anomalías , Mandíbula/anatomía & histología , Mandíbula/diagnóstico por imagen , Mandíbula/inervación , Tercer Molar/anatomía & histología , Tercer Molar/diagnóstico por imagen , Radiografía Panorámica , Traumatismos del Nervio TrigéminoRESUMEN
A 32-year-old female patient was referred to an oral and maxillofacial surgeon with an asymptomatic swelling in the left mandibular premolar region. After extraction of these premolars and enucleation of the lesion histopathological examination confirmed the presence of a giant cell granuloma. This is a benign lesion and enucleation generally results in a permanent cure and is only recurrent in a few cases. Approximately 1 year after treatment, the patient was still free of recurrence and together with a prosthodontist, the appropriate rehabilitation of the resulting defect will be sought.
Asunto(s)
Granuloma de Células Gigantes/cirugía , Enfermedades Mandibulares/cirugía , Adulto , Femenino , Humanos , Mandíbula/patología , Mandíbula/cirugía , Osteotomía , Recurrencia , Resultado del TratamientoRESUMEN
A 46-year-old woman was referred for orthodontic surgery consultation because ofa retrognathic maxilla, unilateral cross bite and functional, aesthetic and speech problems. The maxilla was widened unilaterally by unilateral surgically assisted rapid maxillary expansion with a bone-borne transpalatal distractor. During post-operative orthodontic treatment, a temporary anchorage device was administered. With the help of composite veneers, crowns and a removable partial denture, a functionally and aesthetically satisfying result was achieved.
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Maxilar/cirugía , Osteogénesis por Distracción/métodos , Osteotomía Le Fort/métodos , Técnica de Expansión Palatina/instrumentación , Femenino , Humanos , Maxilar/anomalías , Persona de Mediana Edad , Aparatos Ortodóncicos , Osteogénesis por Distracción/instrumentación , Osteotomía Le Fort/instrumentación , Resultado del TratamientoRESUMEN
In order to make teeth-movement possible, orthodontic anchorage is necessary. Neighbouring teeth, a headgear, dental implants and bone anchors can be used. During the period 2002-2007 158 bone anchors have been placed in 84 patients by an oral surgeon after referral by an orthodontist in order to achieve anchorage for orthodontic treatment. The bone anchor consists of a titanium osteosynthesis-plate ending in a round neck perforating the soft tissue and a cylinder attached to it. The indications for placement, results and complications were registered. 15 anchors (9,5%) were lost prematurely and in 13 cases (8,2%) complications needing surgical intervention were reported. It is concluded that zygoma-bone anchor is a good alternative for orthodontic anchorage and the number of complications is acceptable, though there is room for improvement.
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Maloclusión/terapia , Métodos de Anclaje en Ortodoncia/instrumentación , Métodos de Anclaje en Ortodoncia/métodos , Complicaciones Posoperatorias/epidemiología , Técnicas de Movimiento Dental/instrumentación , Cigoma/cirugía , Adolescente , Adulto , Profilaxis Antibiótica , Placas Óseas , Niño , Implantación Dental Endoósea , Femenino , Humanos , Masculino , Persona de Mediana Edad , Titanio , Resultado del Tratamiento , Adulto JovenRESUMEN
Within the field of oral and maxillofacial (OMF) surgery, eHealth is expected to be a tool to improve quality of care. The aim of this study is to map the research of patient-centred eHealth interventions within OMF surgery by means of a scoping review. After a systematic literature search, relevant studies on patient-centred eHealth interventions for OMF-surgery patients were selected. The interventions were mapped based on their key components, target population and outcome measures. To gain insight in the research phase of evaluation, the framework of the Medical Research Council (MRC) was used. Forty-one papers were included, comprising 34 unique interventions. Nineteen interventions were designed for head and neck cancer patients, 11 interventions concernd video-teleconsultation. According to the MRC framework, 26 papers fitted into the feasibility and piloting phase of research, 8 into the evaluation phase, 7 were in the development phase. No implementation studies were found. This scoping review can be a starting point for those who are interested in applying and evaluating eHealth in their practice. Since many feasibility and pilot studies were found on similar interventions, a more extensive collaboration with and connecting to each other is recommended to catalyze the implementation of eHealth in daily practice. Profound involvement of patients in developing and evaluating eHealth interventions is essential to achieve true patient-centred OMF surgery.
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Cirugía Bucal , Telemedicina , Atención Odontológica , Humanos , Evaluación de Resultado en la Atención de SaludRESUMEN
The state-of-the-art diagnostic tools in oral and maxillofacial surgery and preoperative orthodontic treatment are mainly two-dimensional, and consequently reveal limitations in describing the three-dimensional (3D) structures of a patient's face. New 3D imaging techniques, such as 3D stereophotogrammetry (3D photograph) and cone-beam computed tomography (CBCT), have been introduced. Image fusion, i.e. registration of a 3D photograph upon a CBCT, results in an accurate and photorealistic digital 3D data set of a patient's face. The purpose of this study was to determine the accuracy of three different matching procedures. For 15 individuals the textured skin surface (3D photograph) and untextured skin surface (CBCT) were matched by two observers using three different methods to determine the accuracy of registration. The registration error was computed as the difference (mm) between all points of both surfaces. The registration errors were relatively large at the lateral neck, mouth and around the eyes. After exclusion of artefact regions from the matching process, 90% of the error was within+/-1.5 mm. The remaining error was probably caused by differences in head positioning, different facial expressions and artefacts during image acquisition. In conclusion, the 3D data set provides an accurate and photorealistic digital 3D representation of a patient's face.
Asunto(s)
Tomografía Computarizada de Haz Cónico/métodos , Cara/anatomía & histología , Procesamiento de Imagen Asistido por Computador/estadística & datos numéricos , Imagenología Tridimensional/métodos , Fotogrametría/métodos , Piel/anatomía & histología , Artefactos , Tomografía Computarizada de Haz Cónico/estadística & datos numéricos , Ojo/anatomía & histología , Expresión Facial , Humanos , Imagenología Tridimensional/estadística & datos numéricos , Boca/anatomía & histología , Cuello/anatomía & histología , Variaciones Dependientes del Observador , Fotogrametría/estadística & datos numéricos , Estudios Prospectivos , Reproducibilidad de los Resultados , Programas InformáticosRESUMEN
Body dysmorphic disorder (BDD) is a severe psychiatric disease with delusions about defects in appearance for which patients seek surgical help. This is the first European study to determine the half-year prevalence of BDD in a maxillofacial outpatient clinic. A total of 160 patients with maxillofacial problems completed a validated self-report questionnaire, while a staff member scored maxillofacial defects on a severity scale. Twenty-eight (17%) patients had excessive concerns about their appearance, which negatively influenced their psychosocial functioning; 16 patients (10%; 95%CI 5-15%) screened positive for BDD. The high prevalence of problems related to psychosocial functioning and the occurrence of BDD in maxillofacial patients means that maxillofacial surgeons should take psychological concerns about physical defects into account.
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Imagen Corporal , Anomalías Maxilofaciales/psicología , Trastornos Somatomorfos/epidemiología , Cirugía Bucal/psicología , Adolescente , Adulto , Niño , Femenino , Humanos , Masculino , Maloclusión/psicología , Maloclusión/cirugía , Persona de Mediana Edad , Países Bajos , Prevalencia , Autoevaluación (Psicología) , Trastornos Somatomorfos/diagnóstico , Trastornos Somatomorfos/psicología , Síndrome de la Disfunción de Articulación Temporomandibular/psicología , Síndrome de la Disfunción de Articulación Temporomandibular/cirugía , Adulto JovenRESUMEN
The material to be used for closing the root canal when carrying out a retrograde surgical apical endodontic treatment continues to be a subject of discussion. The aim of the present study was to inventory which materials are being used for this purpose at this moment by Dutch O&MF surgeons. All practicing Dutch OM&F surgeons (n = 195) were sent a questionnaire. The response rate was 77%. The results showed that at this moment intermediate restoration material (IRM) is the retrograde filling material most widely used by the Dutch O&MF surgeons (47.6%) in cases of surgical apical endodontic treatment. Amalgam, with 35%, was second, especially due to its plasticity and convenience. The choice of material is just as often determined by tradition, personal preference, individual experience or scientific results. There seems to be no relationship between the dental surgeon's number of years of experience and the type of retro grade filling material which he or she uses.