1,721,052 research outputs found
Congresso Nazionale del Collegio dei docenti universitari di discipline odontostomatologiche
No full textImpaction of third molars and localized cancer of the oral cavity: A simple occasional finding? A retrospective case series and literature review
Full text linkObjectives: The aim of this study is to analyze, through a literature review and the description of four clinical cases, whether prolonged tooth impaction may represent a trigger for the onset of oral carcinoma. Materials e methods: In this report, four cases of patients needing the extraction of third molars in complete mucosal or bone impaction are described, which, due to the presence of an unusual radiographic and/or clinical aspect, were found to represent cases of oral carcinomas on histologic analysis. Patients were then referred to the ENT department for further care. A review of the literature has been performed as well. Results: Literature analysis revealed the presence of only few case reports on the topic, suggesting therefore a lack of evidence on the correlation between tooth impaction and the onset of oral carcinomas. Conclusions: Further studies are needed in order to give valid hypotheses. The concept of inflammation, that is at the base of oral carcinogenesis mechanism and tooth-related pathologies, such as pericoronitis, may be a common substrate to link these two phenomena. Clinical relevance: A thorough analysis of the radiographic and clinical signs is strongly recommended prior and during surgical procedures, such as tooth extraction
La componente cranio-encefalica nelle fratture del C.O.M.Z.: utilità dell’esame elettroencefalografico
No full textThe authors exame the electroencephalogram in patiens with zygomatic-maxillary complex fractures. The electroencephalogram can give us precious information about management and therapy of the patients when a certain brain pain is noticeable. - Gli autori prendono in esame gli aspetti del tracciato elettroencefalografico rilevabile tra pazienti ricoverati in seguito ad una frattura del complesso orbito-maxillo-zigomatico (COMZ). L'EEG può fornirci preziosi ragguagli sulla gestione e la terapia di questi pazienti laddove è presente un certo risentimento encefalico
The effectiveness of surgical management of oroantral communications: a systematic review of the literature
No full textBACKGROUND:
An oroantral communication (OAC) is a common complication in alveolar surgery that usually occurs as a result of the extraction of maxillary posterior teeth. To avoid further complications, several closure techniques are used; most of them need a flap elevation. Recently, simpler conservative flapless techniques for OAC closure have been described.
OBJECTIVES:
To appraise the effectiveness of different techniques for closure of OACs also in comparison to nothing.
SEARCH METHODS:
The following electronic databases were searched for randomised controlled trials regarding techniques for closure of OACs: PubMed; SciVerse Scopus; Latin American and Caribbean Health Sciences; The Scientific Electronic Library Online and The Cochrane Library (from January 1949 to August 2014). Unspecific algorithms were chosen in order to maximise search sensibility. Additional manual searching was performed in PubMed related citations, in five journals and in the references of the selected articles. There were no restrictions with regard to publication language.
SELECTION CRITERIA:
Randomised controlled trials (RCTs) comparing techniques for closing oroantral communications to nothing, or different techniques for closing oroantral communications reporting the success rate with at least two months follow-up.
DATA COLLECTION AND ANALYSIS:
The screening of eligible studies, the assessment of methodological quality and data extraction were done by two independent reviewers working in duplicate.
RESULTS:
The research individuated 1256 publications. After screening, only five articles were assessed for eligibility. Only two RCTs evaluating the effectiveness of techniques for OAC closure fulfilled the inclusion criteria of the present review. One trial including 30 patients assessed whether flapless techniques (resorbable root analogues and haemostatic gauze) could be as effective as the Rehrmann's buccal flap; all the patients were reported as successfully healed in the three intervention groups. Another RCT with 20 patients compared the effectiveness of the buccal fat pad flap (100% success rate) with a sandwich graft with hydroxyapatite crystals within collagen sheaths (90% success rate). The authors found no significant difference.
CONCLUSIONS:
There are no RCTs evaluating whether an oroantral communication should be closed or not. There is weak evidence from two RCTs showing good results with five different techniques for closure of OACs (resorbable root analogues, haemostatic gauze, Rehrmann's buccal flap, buccal fat pad flap, sandwich graft with hydroxyapatite crystals). Until sufficiently high quality RCTs are conducted, elevating or not a flap for closure of OACs will be left to the personal choice of the surgeon
Classification of impacted mandibular third molars on cone-beam CT images
No full textBackground: Neurological involvement is a serious complication associated to the surgical removal of impacted
mandibular third molars and the radiological investigation is the first mandatory step to assess the risk of a possible
post-operative injury to the inferior alveolar nerve (IAN). The aim of this study was to introduce a new radiological
classification that could be normally used in clinical practice to assess the relationship between an impacted third
molar and mandibular canal on cone beam CT (CBCT) images.
Material and Methods: CBCT images of 80 patients (133 mandibular third molars) were independently studied
by three members of the surgical team to draw a classification that could describe all the possible relationships
between third molar and IAN on the cross-sectional images. Subsequently, the study population was subdivided
according to this classification. The SPSS software, version 15.0 (SPSS® Inc., Chicago, Illinois, USA) was used
for the statistical analysis.
Results: Eight different classes were proposed (classes 0-7) and six of them (classes 1-6) were subdivided in two
subtypes (subtypes A-B). The distribution of classes showed a prevalence of buccal or apical course of the mandibular canal followed by lingual position and inter-radicular one. No differences have resulted in terms of anatomic
relationship between males and females apart from a higher risk of real contact without corticalization of the canal
when the IAN had a lingual course for female group. Younger patients showed an increased rate of direct contact
with a reduced calibre of the canal and/or without corticalization.
Conclusions: The use of this classification could be a valid support in clinical practice to obtain a common language
among operators in order to define the possible relationships between an impacted third molar and the mandibular
canal on CBCT image
Articolazione temporomandibolare (atm) ed osteogenesi imperfetta. Studio sullo sviluppo embriologico.
No full textLocalization of Basicranium Midline by Submentovertex Projection for the Evaluation of Condylar Asymmetry
No full textThe purpose of this research was to compare the reliability of two different methods for cranial midline localization through cephalometric analysis of mandibular condyle asymmetries. A retrospective cohort study was performed analyzing consecutively the SMV radiograms of 47 patients undergoing oral surgery before orthodontic treatment at the Dental School, University of Trieste (Italy) from 2003 to 2008. Two different cephalometric analyses were used to identify the basicranium midline (Tracing 1: initial landmarks = craniostat ear rods; Tracing 2: initial landmarks = spinosum foramina), and the left/right symmetry ratio (SR) for four parameters (condylar length, condylar angle, intra-condylar hemidistance, extra-condylar hemidistance) was calculated. The main result showed that no significant statistical difference between the SRs of the intra-condylar and extra-condylar hemidistance obtained with the same tracing was found (-test; =NS; C.I. 95%). Conversely, the difference between the SRs obtained with the two different tracings was statistically significant (-test; <0.000; C.I. 95%). In conclusion, if the analysis of condylar asymmetries is performed in growing subjects, utilization of anatomic references such as the neurovascular foramina seems to guarantee a lower error compared to non-fixed references such as ear rods
A preliminary report on a method for studying the permeability of expanded polytetrafluorene membrane to bacteria in vivo: a scanning electron microscopic and histological study
No full textPrimary reconstruction with PEEK implant of an intraosseous venous malformation of the lateral orbital rim
No full textVascular malformations are rare in the orbito-malar region being 64 cases only described since 1950. After ablation, reconstruction is crucial to avoid facial deformities. A 76-year-old male case complaining of a painful left orbital swelling is reported. TC and MRI showed the intraosseous vasal malformation imaging pattern. A segmental orbital ostectomy with immediate PEEK implant reconstruction was performed. Histopathology and immunopathology confirmed the nature of the lesion. At 1 month, the patient was satisfied about the appearance. Medical history and digital imaging patterns allow to avoid the risks of severe hemorrhage from a bony biopsy which can be life-threatening; one-block excision is the treatment of choice, reconstruction is challenging for facial aesthetics. Computer assisted reconstruction, allows to produce an alloplastic customized implant, mirroring the unaffected side into the defect, reducing operation time and overall morbidity. Histopathology and immunohistochemistry define clearly the nature of the lesion
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