Cone beam computed tomographic evaluation of a maxillary alveolar ridge reconstruction with iliac crest graft and implants

The present article discusses an atrophic maxilla reconstruction with iliac crest bone block and particulate grafts and dental implants. Onlay block grafts were used to restore bone volume of the anterior maxilla, whereas bilateral sinus floor augmentation was performed using a particulate graft. Ten months after the grafting surgery, 9 dental implants were placed to rehabilitate the case. Results of a 7-year follow-up were obtained clinically and by cone beam computed tomographic images.     

Foreign body ingestion during dental implant procedures

Two cases of swallowing of foreign material related to dental implants during dental practice are described. A conservative approach by clinical-radiographic follow-up was performed in both cases; however, one of the patients required colonoscopy under general anesthesia for the removal of the impacted foreign body from the intestinal region. These complications not only have associated economic cost but also carry the risk of malpractice litigation against the professional; thus, the surgeon was responsible for all the costs of hospital and surgery management of this case. Details of the clinical signs, radiographic examinations, type of treatment, and follow-up are presented.     

Rehabilitative treatment of cleft lip and palate: experience of the Hospital for Rehabilitation of Craniofacial Anomalies/USP (HRAC/USP)--Part 1: overall aspects

Cleft lip and palate is the most common among craniofacial malformations and causes several esthetic and functional implications that require rehabilitation. This paper aims to generally describe the several aspects related to this complex pathology and the treatment protocol used by the Hospital for Rehabilitation of Craniofacial Anomalies, University of S?o Paulo (HRAC-USP) along 40 years of experience in the treatment of individuals with cleft lip and palate.     

头颈部侵袭性纤维瘤9例及文献复习

目的:探讨头颈部侵袭性纤维瘤的临床表现、病理特征、治疗方式及预后.方法:根据2005年世界卫生组织的肿瘤类指导原则,回顾性分析2008 ～ 2012年间收治9例头颈部侵袭性纤维瘤的临床资料并复习相关文献.结果:发病部位以颈部(3例)、下颌下区(2例)最为常见,其次是上颌骨、颧部、眶下区、腮腺各1例,对9例患者都实施手术切除,4例患者因肿瘤已侵犯头颈部重要结构,无法获得阴性切缘,其中1例患者发生恶变,接受放射治疗,另2例术后未接受综合治疗,术后复发,所有病例无远处转移,随访时间为6 ～51个月.结论:头颈部侵袭性纤维瘤诊断主要依靠术后病理,彻底手术切除是治疗并减少复发的主要手段,对于复发或难以完整切除的病例可配合放化疗,且术后长时间密切随访.     

High HIF-1α expression genotypes in oral lichen planus

Objective

The aim of this study is to assess whether C1772T and G1790A hypoxia-inducible factor-1 (HIF-1)α polymorphisms are associated with risk of oral lichen planus (OLP).

Material and methods

Restriction fragment length polymorphism analysis was used to investigate HIF-1α C1779T and G1790A polymorphisms in 32 OLP and 88 individuals without OLP.

Results

The frequency of the CC, TT, GA, and AA genotypes was higher in patients with OLP. Notably, individuals carrying the C and A, and T and A haplotypes showed a significant association OLP risk.

Conclusions

Our study demonstrated that the C1772T and G1790A polymorphisms of HIF-1α gene increased the risk of OLP. C1772T and G1790A polymorphisms of HIF-1α gene had differing patterns of allelic imbalance in the normal samples and subsequent chronic lesions. Further studies are necessary to elucidate the HIF-1α pathway in OLP, which would facilitate the development of novel therapeutic strategies for the prevention and treatment of OLP.

Clinical relevance

These results, in conjunction with previous studies, suggest that HIF-1α may play important roles in the chronicity of oral mucosa lesions of OLP patients. Taken together, we suggest that HIF-1α polymorphisms enhance its target genes, thereby altering the microenvironment and supporting sequential release of inflammatory mediators or cellular events in OLP. It appears unlikely that inhibition of a single proinflammatory mediator will prove useful in clinical practice, but several ways to reprogram mediators engaged in a wide array of roles simultaneously are encouraging.     

Laser irradiation affects enzymatic antioxidant system of streptozotocin-induced diabetic rats

The aim of the present study was to analyze the effect of low-power laser irradiation in the antioxidant enzymatic system of submandibular (SMG) and parotid (PG) salivary glands of streptozotocin-induced diabetic rats. The animals were randomly divided into six groups: three diabetic groups (D0, D5, and D20) and three non-diabetic groups (C0, C5, and C20), according to laser dose received (0, 5, and 20 J/cm², respectively). Areas of approximately 1 cm² were demarcated in the salivary glands (each parotid and both submandibular glands) and after irradiated according to Simões et.al. (Lasers Med Sci 24:202–208, 2009). A diode laser (660 nm/100 mW) was used, with laser beam spot of 0.0177 cm2. The group treated with 5 J/cm² laser dose was subjected to irradiation for 1 min and 4 s (total irradiation time) and the group treated with 20 J/cm² laser dose was subjected to irradiation for 4 min and 16 s. Twenty-four hours after irradiation the animals were euthanized and the salivary glands were removed for biochemical analysis. The total antioxidant values (TA), the activity of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase enzymes were determined. SOD and CAT activities, as well as TA were higher in SMG of irradiated diabetic rats. However, in SMG of non-diabetic rats, laser irradiation decreased TA values and led to an increase in the CAT activity. In addition, there was a decrease in the activity of CAT in PG of diabetic and non-diabetic animals after laser irradiation. According to the results of the present study, low-power laser irradiation can affect the enzymatic antioxidant system of salivary glands of streptozotocin-induced diabetic rats.     

动态心电图对体表心电图P-R间期延长的诊断价值

目的 探讨动态心电图对体表心电图P．R间期延长的诊断价值,分析P—R间期延长的临床意义和预后。方法选择2008年1月至2011年8月在昆明医学院第二附属医院住院和门诊心电图有P-R间期延长的患者90例为研究对象．监测其动态心电图。分析P．R间期的变化及阵发性心房颤动、房室结双径路传导、第二度I型房室阻滞、间歇性左右束支阻滞4类心律失常。并且根据P—R间期延长程度分为3组,对比其与上述4类心律失常的关系。结果动态心动图结果中伴发第二度I型房室阻滞2l例（23．33％）、房室结双径路传导17例（18．89％）、间歇性左右束支阻滞9例（10％）、阵发性心房颤动7例（7．78％）。在所有的患者中,P．R间期延长伴发上述4类心律失常发生率为60％。心电图结果中,P-R间期延长50例,显著延长29例,过度延长11例。动态心动图结果中。P。R间期延长32例,显著延长38例,过度延长20例。结论P—R间期延长不应均视为良性和无须干预的心律失常,相反,需要进行进一步动态心动图监测及电生理检查和追踪观察,争取早期发现病变、消除病变,为临床早期诊断、早期治疗提供辅助手段。