Management of maxillary impacted canines: A prospective study of orthodontists' preferences

BackgroundMaxillary canines are considered the most commonly impacted teeth, after the third molars. Orthodontists have different preferences on how to approach maxillary impacted canines (MIC). The objective of this article was to investigate orthodontists’ approach to managing MIC.Material and methodsA cross-sectional study comprising a comprehensive survey with 22 questions was sent to practicing orthodontists. This study explored the preferred diagnostic measures, surgical techniques, materials, and mechanics utilized to manage MIC;104 responses were returned.ResultsPalatal impaction was reported to be encountered more often than labial impaction by 60% of the respondents. In 62% of the respondents, an oral and maxillofacial surgeon was the specialist preferred to perform the surgical exposure. In 66%, the choice of required surgical techniques was reported as a joint decision between orthodontists and other specialists who perform the surgery. Cone-beam computed tomography (CBCT) was reported to be the diagnostic x-ray of choice. The gold button with a chain was the preferred bonded attachment in 86% of cases. Less than half of the respondents bonded the attachments themselves during surgical exposure. A clear plastic retainer was the preferred retainer in 61% of the respondents, and 43% of the respondents tended to use a closed exposure technique. Coe-pak^TM was the preferred surgical pack for orthodontists who prefer an open exposure technique. Piggyback (double wire) was the preferable mechanic to move a palatally impacted canine.ConclusionOur findings indicate that there are variations among orthodontists on how to manage MICs in terms of diagnostic methods, surgical management, materials, and mechanics.     

Inflammatory pseudotumour (plasma cell granuloma) arising in the maxillary sinus

Conclusions. Inflammatory pseudotumours in the maxillary sinus may present as malignant tumours and manifest locally aggressive features characteristic of such tumours. Despite their locally destructive features, they pursue a benign course after local excision. Objective. Inflammatory pseudotumour (plasma cell granuloma) is an uncommon non-neoplastic lesion comprising a proliferation of spindle myofibroblasts and chronic inflammatory cells. Despite its benign histopathological nature, it may exhibit aggressive behaviour that is yet to be characterized in the head and neck area. Material and methods. We present the cases of two adult patients with inflammatory pseudotumour arising from the maxillary sinus. Immunohistochemistry and polymerase chain reaction for immunoglobulin from tissue sections were performed to confirm the polyclonality of the infiltrating plasma cells. Results. CT and MRI disclosed expansive soft masses eroding surrounding soft and bony tissues. Histopathologically, the lesions were unencapsulated and composed of numerous plasma cells, histiocytes and spindle cells with minimal nuclear pleomorphism.     

上颌窦穿刺冲洗治疗儿童急慢性鼻窦炎的效果分析

目的分析上颌窦穿刺冲洗治疗儿童急慢性鼻窦炎的临床疗效。方法将320例儿童(7~12岁)急慢性鼻窦炎患者采用随机平行试验设计,分为实验组160例和对照组160例,两组均服用鼻窦炎口服液1次10 m l,每日3次,实验组在鼻腔黏膜麻醉下行上颌窦穿刺,用0.9%氯化钠溶液加甲硝唑注射液反复冲洗后,窦腔内注入地塞米松5mg,每周一次;鼻腔内滴1%呋喃西林麻黄素液,3次/d,15 d为一个疗程。对照组口服广谱抗生素+鼻腔内滴1%呋喃西林麻黄素液,3次/d,15 d为一个疗程。治疗结束后每月复查1次,6个月后进行疗效评定。结果实验组的治愈率84.38%,总有效率98.75%,均显著高于对照组,两组间比较有显著性差异(P<0.01)。结论上颌窦穿刺冲洗结合鼻窦炎口服液治疗儿童急、慢性鼻窦炎疗效可靠,穿刺前充分评估患儿病情,实施健康教育,加强心理护理是上颌窦穿刺治疗顺利进行的基础,也是上颌窦穿刺成功的重要保证。     

The relationship between various parameters of complete denture quality and patients’ satisfaction

BackgroundPatients’ appreciation of their conventional complete dentures might be affected by the quality of the dentures.MethodsA random sample of 33 edentulous patients who were rehabilitated by means of conventional complete dentures participated in the study. Three independent investigators who underwent technique calibration evaluated the dentures on the basis of seven clinical criteria by using a validated examination form. The patients filled out a validated denture satisfaction scale. The author used Pearson product-moment correlation and analysis of covariance to identify possible correlations.ResultsThe study results showed that most patients were between “reasonably satisfied” and “very satisfied” with their dentures. The author found nominally higher satisfaction among those receiving both mandibular and maxillary dentures and significant positive correlations between the overall denture satisfaction score and the stability of the mandibular denture (P = .039) and retention of the mandibular denture (P = .005). In contrast, esthetic lip support and lower lip line, occlusion, and maxillary stability and retention were not correlated with participants’ overall satisfaction level (P > .064).ConclusionsThe results of this study show that a clinically stable mandibular denture was the most important determinant of patients’ satisfaction.Practical ImplicationsThe study findings highlight the most important denture quality parameters that can aid clinicians in meeting their patients’ expectations.     

Iliac crest free flap and submental island flap for maxillary reconstruction

Abstract

The iliac crest free flap is one of the most reliable flaps for maxillary reconstruction because of the large amount of bone provided and the chance to harvest both muscle and skin. However, reconstruction of maxillary through-and-through defects requires special skills to be managed. Simultaneous replacement of oral lining and external tissue with the same features as the resected skin is difficult to achieve with conventional techniques and the use of flaps association is often necessary to ensure acceptable cosmetic and functional results. In the case presented the submental island flap was a good choice to overcome these difficulties.     

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??Objective??To evaluate the clinical effect of maxillary sinus lifting??bone graft??and simultaneously placement of implants in severely atrophic maxillae and the stability of cylindrical implants. Methods??Totally 20 patients with 30 Straumann tissue-level implants were included. After osteotome sinus floor elevation and grafting??implants were inserted. Patients were recalled at 1 and 3-years follow-up. Implant success??resonance frequency analysis??clinical and radiographic outcomes were recorded. Results??At 3-year examination??the implant success rate was 96.7%. The ISQ value was 71.1±4.15??69.6 ± 5.01??68.4 ± 4.34 and 72.8 ± 6.42 at implant insertion??2??4 and 12 weeks after surgery. Modified bleeding index was 0.53 ± 0.40 and 0.61 ± 0.31 at 1 and 3-year examination. Probing depth was??3.21 ± 0.67??mm and??3.45 ± 0.71??mm at 1 and 3-year examination. Modified plaque index was 0.48 ± 0.44 and 0.52 ± 0.51 at 1 and 3-year examination. No significant difference was found between two examinations. Marginal bone loss increased from ??1.16 ± 0.27??mm at 1-year follow-up to ??1.45 ± 0.39?? mm at 3-year follow-up??the difference reached statistically significant??P < 0.05??. Implant apex height decreased from ??2.05 ± 0.43??mm at baseline to ??1.85 ± 0.75??mm at 1-year and ??1.42 ± 0.69??mm at 3-year follow-up??the difference reached statistically significant??P < 0.05??. Conclusion??Maxillary sinus lifting??bone graft??and simultaneously placement of implants could be a predicable treatment option in severely atrophic maxilla. In addition??cylindrical implants could achieve enough stability during the healing phrase. High success rate could be achieved in the short term.     

Peripheral primitive neuroectodermal tumour of the left maxillary sinus

Peripheral primitive neuroectodermal tumours (pPNETs) are highly malignant, small-cell neoplasms found mainly in children and young adults. Recent advances in immunohistochemistry and genetic typing have led to reports of a close relationship between pPNET and the previously difficult-to-classify Ewing's sarcoma. We report a case of pPNET involving the left maxillary sinus in a 23-year-old female who presented with a 2-month history of unilateral left-sided nasal obstruction, rhinorrhoea and recurrent bloody nasal discharge. A CT scan of the paranasal sinuses showed a large mass (10 x 7 x 3 cm3) arising from the left maxillary sinus, with signs of bone destruction and invasion of the left orbital floor and pterygomaxillary fossa. MRI revealed a heterogeneous hyperintense signal on a T2-weighted image in the left maxillary sinus. The tumour was surgically removed by means of external lateral rhinotomy. Pathological examination showed a sheet of small cells with irregular nuclei. Immunohistochemical studies demonstrated positive immunoreactivity for neurone-specific enolase, synaptophysin, chromogranin, vimentin, S-100 protein and p30-32 MIC-2 gene product. The patient was treated with chemotherapy consisting of cyclophosphamide, vincristine, adriamycin and actinomycin D, together with radiotherapy to a total tumour dose of 60 Gy. After 59 months of follow-up, the patient remained free of disease and a repeat MRI scan was normalized, with no sign of residual tumour.