Revista clínica de periodoncia, implantología y rehabilitación oral最新文献

Introduction

Although the role of saliva in the protection against root caries has been widely controversial, few studies have examined the association with salivary flow.

Objective

To determine if a decreased salivary flow is related to increased prevalence and activity of root caries in the elderly living in the community.

Materials and methods

A cross-sectional study was conducted on 332 elderly participants. Subjects were interviewed, completed a sociodemographic questionnaire, were orally examined, and donated a sample from unstimulated and stimulated salivary flow. Clinical examinations were carried out to assess prevalence and activity of root caries using ICDAS criteria. The ‘Root Caries Index’ (RCI) and percentage of Active Root Caries (ARC) were calculated. Data were analysed using the Student t test, ANOVA and Kruskal Wallis, with a significance level of .05.

Results

Salivary flow was significantly lower in women and in subjects with high drug consumption and systemic diseases (P < .05). Although neither RCI nor the percentage of ARC differed in relation to unstimulated salivary flow, they were slightly higher in people with normal stimulated salivary flow (P < .05).

Conclusion

Salivary flow does not appear to be numerically associated with the prevalence or the activity of root caries in independent older adults.

Cleft lip and palate is the lack of fusion of the palatal and labial processes during embryonic development. Patients are characterised by the presence of buconasal communication, dental alterations, and poor development of the maxilla. Treatment requires multidisciplinary team work, due to the impact on basic functions such as eating, talking or interacting with other people, and even compromising their quality of life.

Although primary surgery mostly solves this anomaly, sometimes communication between the oral and nasal cavity persists (called communication or buconasal fistula). This leads to greater difficulty to surgically close it, being impossible in some cases. In these cases, the closure using a prosthesis provides a low-cost solution for the patient, with an optimal result in the short and medium term.

The aim of this article is to present cases of prosthetic rehabilitation in patients with cleft lip and buconasal fistula after surgical treatment.

Objective

To determine the prevalence of temporomandibular disorders (TMD) in adolescents of southern Chile, in 2015.

Material and methods

A prevalence study was conducted on a selected group of 186 adolescents with a mean of age of 15.4 ± 1.25 years, and 51.1% male, from 29 schools in Valdivia, Chile, between June and October 2015. A calibrated researcher calibrated (kappa = 0.86) carried out a clinical examination according to the instructions of the Axis I and some questions of the Axis II of “Research Diagnostic Criteria for Temporomandibular Disorders” (RDC/TMD) application. The type of TMD was classified according to the diagnostic algorithm: muscular disorder (group 1), articular disorder (group 2), and articular damage (group 3). A self-report of headache, clenching teeth sensation, and articular noise was registered. The prevalence of TMD was analysed according to age and gender of the patients (Chi-squared and Student t test; P < .05).

Results

Headache was recorded by 41% of the adolescents, with 32.5% reporting a sensation of clenching teeth, and 25.8% felt some articular noise. According to the RDC/TMD, the prevalence of TMD was 26.66%, with a male: female ration of 1:1.27 (P = .24). A muscular disorder was present in 10.8% of them, and 11.3% had articular damage.

Conclusion

Four out of ten adolescents, mostly female, manifested some kind of pain or temporomandibular discomfort. The prevalence of TMD was higher in number when compared to similar studies, but lower than that reported in young adults.

Currently, there is consensus that the damage of the tooth support tissues that occurs during periodontitis is a complex mechanism, in which the presence of specific periodontal pathogens is necessary, but not sufficient, to fully explain the extent and severity of the observed periodontal destruction. Moreover, the destruction of periodontal support tissue is largely the effect of the imbalance in the patient immune response, triggered by periodontal pathogen-derived antigens and virulence factors. The immune response elicited by periodontal pathogenic bacteria includes mechanisms associated with both innate and adaptive responses, where the role of antimicrobial peptides and lipid mediators are related to these two arms of immunity, and have not been fully elucidated in relation to their mechanisms of action against periodontal pathogens. In this review, a discussion is presented on the characteristics of these molecules and their role in periodontal disease in relation to both protection and destruction of tooth supporting tissue during periodontal infection. The relevance of considering these mediators within the complex scenario of the immune response during periodontal diseases is also highlighted, since they are a fundamental part of the host immune response. Periodontal diseases should be analysed in a broader perspective, where the study of these types of molecules involved in the immune response of periodontal tissues, may help to develop new therapeutic approaches to periodontal diseases in the future.

Objective

To assess the periodontal treatment needs of 12 year-old adolescents of urban municipal schools in Valdivia, Chile.

Materials and methods

A cross-sectional, descriptive, observational study was carried out. A total of 225 adolescents of 12 years of age attending municipal schools in Valdivia between April and May, who met the inclusion criteria were evaluated. Treatment needs were determined using the Community Periodontal Index of Treatment Needs (CPITN).

Results

The findings revealed that 8% of the examined adolescents had a healthy periodontium, 40.9% had gingival bleeding on probing, 47.6% had calculus deposits, and 3.5% were examined using a periodontal chart to determine mild, moderate, or severe periodontitis.

Conclusion

According to the results it is evident that there is a high need for periodontal treatment by 12 year old adolescents attending urban municipal schools in Valdivia. The data of this study will help encourage additional research on the subject and in planning dental programs in the region, with emphasis on prevention and treatment of periodontal diseases from primary health care.

This study aimed to histometrically evaluate the presence of gingival recession in the mesial surface of the teeth of rats experimentally subjected to primary occlusal trauma. This evaluation verified the distance from the cement-enamel junction (CEJ) to the free marginal gingiva (FMG) and to the height of the alveolar bone crest (CEJ-crest bone distance). There were 10 animals, randomly divided into 2 groups: occlusal trauma (OT) (n = 5) – creation of an occlusal interference by fixing an orthodontic wire segment on the mandibular first molar occlusal face, which was randomly chosen, and a Control Group (CG) (n = 5) – five animals with no exposure to the OT variable were euthanised after 14 days to obtain the initial parameters. The inter-group evaluation showed there was no significant difference between OT × CG when the CEJ-FGM distance (P = 0.192) was evaluated after 14 days, but there was a significant difference between the two groups as regards the CEJ-alveolar crest bone distance (P = 0.0142). Thus, it can be concluded that the OT induction model, after 14 days of experiment, promoted bone resorption. This was observed by the increase in the CEJ-alveolar crest bone distance. It also did not promote gingival recession, which was evaluated by the CEJ-FGM distance.

Gingival melanosis or physiological gingival melanin pigmentation is a disorder that causes a change in the colour of the gums, which acquire a dark stain caused by an accumulation of melanin

Objective

The purpose of this review was to assess the current literature on treatment of gingival melanosis and assessing the degree of gingival repigmentation.

Material and method

A detailed search was conducted in the PubMed, Cochrane and Embase databases for information on treatment techniques and post-operative results of each surgical procedure.

Results

Of the 219 articles initially identified, 22 met the inclusion criteria (case reports, case series, clinical trials, and systematic reviews). Scalpel techniques showed a repigmentation after 3 months - 3years, and techniques using laser diode between 18-24 months. Techniques with cryosurgery, electro-surgery, Er: YAG laser and Nd: YAG laser showed little or no repigmentation.

Conclusion

Melanin repigmentation is more common in techniques that use the scalpel, with recurrences ranging from between 3months and 3years. The heterogeneity of the studies limited the performing of a meta-analysis on the results of treatment of gingival melanosis.

Objective

The aim of this study was to determine the clinical consequences, expressed in DMFT and dmft, and their relationship with Molar Incisor Hypomineralisation (MIH) in a population of schoolchildren of 6 to 12 years old in the Santiago Province.

Method

A cross-sectional study was conducted on 851 schoolchildren between 6-12 years old from the Santiago Province were examined by two calibrated examiners. With informed consent from their parents, the schoolchildren were examined, and the European Academy of Paediatric Dentistry (EAPD) diagnostic criteria was used for MIH detection. Caries history was assessed with the DMFT/dmft score according to WHO criteria. Data was collected with a form specially designed for this study. Data was analysed using Student's t-test for individual samples and a post-hoc Bonferroni (P < .05).

Results

The mean DMFT score in the MIH-affected schoolchildren was 0.91 (±1.21), with a mean dmft score of 1.98 (±2.48), which were greater than the scores in the non-MIH affected schoolchildren (mean DMFT score 0.41 [±0.95] and mean dmft 1.34 [±2.15]). The differences between DMFT and dmft scores in the two groups were statistically significant (P < .000 and P = .002, respectively).

Conclusions

Schoolchildren of Santiago Province of 6-12 year old diagnosed with MIH had higher DMFT/dmft scores compared to schoolchildren not affected with MIH.