Odonto-stomatologie tropicale = Tropical dental journal最新文献

The biggest challenge while restoring anterior teeth is shade matching. Hue, chroma, value, opacity, translucency, intensity and anatomy must be seen to be reproduced. To see we need light, knowing that there is a strong relation between the nature of light and the components of natural teeth. This article enlightens the way to do the shade matching and the stratification of anterior teeth by choosing the relevant materials to mimic the nature.The physical properties of natural and polarized light will be studied to understand their correlation with dental materials and natural teeth to use them in the best combination.

Background: Students’ perception of their education is a subject that has received very little attention by those providing dental school education. This is more so in the Nigerian environment, where limited research has been carried out in dental education, particularly with respect to the students’ perspectives on the quality of training received.

Objective: Thus, the aim of this study was to determine the perceptions of dental students and recent dental graduates in Nigeria on their level of satisfaction with the quality of academic and clinical training received in their respective dental schools and the challenges faced in receiving this training.

Methods: This was a cross-sectional descriptive study carried out amongst 271 dental students and recent dental graduates from eight dental schools in the country. Ethical approval for the study was obtained from the Institutional Review Board of the Lagos University Teaching Hospital (LUTH). Data collection was via self-administered questionnaires. Statistical analysis was carried out using SPSS 17.

Results: The final study sample was made up of 239 students, with a mean age of 24.57 (2.21) years. The two dental specialties in which the least level of satisfaction was recorded with regard to the quality of academic training received were Conservative Dentistry and Orthodontics, while for clinical training they were Conservative Dentistry and Oral Biology/Pathology. The three most common factors which were adversely affecting the quality of clinical training received were, poor electricity supply, insufficient dental chairs and quality of training received.

Conclusion: Dental students and recent graduates of Nigerian Dental schools are not satisfied with the quality of undergraduate training received in some dental specialties at their respective dental schools.

This paper relates, through a clinical case, the different steps of the prosthodontic rehabilitation of a palate-pharyngeal cleft, sequelae to surgery, by performing a Suersen’s Velar obturator since the soft Palate is divided but toned. A functional reeducation in conjunction with a prosthodontic care improves the quality of life’s patients and help for their resocialization. This therapeutic is non-invasive, quick, efficient and evolutive method.

The authors describe the early neglected oral communication of maxillary sinus and nasal cavity, causing reflux of liquid and sometimes solids through the nose, followed by immediate intrabuccal flow or posterior pharyngeal with fetidness. The objective of this work was to improve the therapy of immediate or delayed oral communication of maxillary sinus with nasal cavity and eventually and the quality of life.

Introduction: Orphanages are a high-risk group of oral health diseases. The aim of this study was to evaluate oral hygiene attitudes among orphans living in Al Akkari orphanage in Rabat, Morocco.

Materials and methods: cross sectional study was conducted among 165 orphans aged between 6 and 15 years-old at the orphanage Al Akkari in Rabat, between December 2012 and February 2013. The information collect was realized by direct questioning of all the residents. The questions were asked by a dentist and concerned the attitudes of the residents towards principles of oral hygiene, the possession of toothbrush and dentifrice, tooth brushing frequency and methods and the existence or not of a previous oral hygiene instruction was also reported. Seizure and statistical analysis was performed using Statistical Package for the Social Sciences (SPSS) 13.0 software.

Results: The results showed that 94.5 % of the orphans' children have a toothbrush and 90.2% among them have toothpaste. 98.2% of residents brushed their teeth and 83.3% of those who brushed their teeth do it regularly (daily). 49.4% of the orphans' children brushed their teeth vertically while 88.5% of them had already oral hygiene instructions.

Discussion: Attitudes of resident concerning tooth brushing regularity and the used method remains largely insufficient even if the orphans were informed of the importance of oral hygiene.

The purpose of this study is to find out what type of impression material is able to achieve a CAD-CAM (Procera) crown with minimal thickness at the dental-prosthetic interface, taking into account the effect of the oversize replica and dimensional variations of the impression materials over time. The accuracy of the marginal adaptation will therefore depend on the oversize replica of clinical preparation controlled by the constant K. Three different types of impression materials: medium viscosity polyether (Impregum 3M-ESPE, Germany), silicones polyvinyl siloxane A (Putty + Very Light) and (Heavy + Light) (Express 3M-ESPE, Germany), were used for making impressions of fifteen initial prototype maxillary teeth made of nickel chrome. The cast of the impressions were poured with plaster type IV (Zhermack, Italy), on which thirty Procera crowns were fabricated. The thickness of the dental-prosthetic interface was then studied at three levels: 0, 1 and 2 mm. The results show that the impression material has a statistically significant impact on the thickness of the dental-prosthetic interface at all three levels. The most compressive impression technique, Putty + Very Light gave the best results at the three levels pre-cited. The results analyzed under optical microscopy show a statistically significant difference between the three impression material products (p-value < 0.05). The calibration constant K, according to each clinical situation, can therefore lead to optimal dental-prosthetic inter-face.

Introduction: This study was designed to analyse the treatment outcome of traumatized anterior teeth with delayed presentation among adult patients.

Method: A longitudinal study carried out among adult patients with traumatized anterior teeth. Data was obtained by means of a pre-tested questionnaire consisting of history taking, clinical examination and record of treatment. Data collected was analysed using the Statistical Package for Social Science 21.0.

Results: Out of 163 patients who sought treatment for traumatized anterior teeth, 102 presented a month or more after the traumatic incident giving a prevalence rate of 62.3% for delayed presentation. The main reason for seeking treatment was disfigured teeth. More than half (57.8%) of the participants presented with one or more complications. Evaluation revealed that 3 (2.7%) of the participants had failed restoration at 1-month recall and this was statistically significant.

Conclusion: Delayed treatment has an implication on the type, complexity and cost of treatment. Evaluation after treatment for traumatized anterior teeth has to be done for a minimum of 3 months to ascertain optimal result. Oral health education should focus on the need to visit a dentist immediately after a traumatic episode with or without loss of dental hard tissue.

Introduction: Primary lymphoma of the mandible are rare and most often revealed by painless swelling. They are often confused with odontogenic lesions. Hence, their diagnosis is delayed. The authors report the case of an isolated mandibular lymphoma revealed by hypoesthesia of the lower lip and enlargement of the left mandibular canal.

Case report: A 35-year-old woman patient consulted for hemi-mandibular pain with episodes of left labial hypoesthesia. Clinically, we noted the presence of a vestibular tumor in front of tooth 34. A panoramic radiograph revealed that the left mandibular canal was widely enlarged, extending from the mandibular foramen to the mental foramen. The biopsy revealed a B-cell lymphoma. No other localization was found. After treatment with seven courses of a chemotherapy based on R-CHOP followed by local radiotherapy, the patient was in remission eighteen months after treatment.

Discussion: Primitive lymphoma of the mandible are rare; they represent about 0.6% of extra-nodal non-Hodgkin lymphoma. They occur at any age and mainly affect males. They most often come out as a painless swelling, sometimes ulcerated in the mouth. They are often misdiagnosed as a dental problem. Treatment combines variably radiotherapy and/or chemotherapy. The prognosis of bone lymphoma is more favorable than others malignancies bone, with a survival rate of 40-50% at five years.

Purpose: This laboratory study conducted to evaluate and compare the influence of different flask closure methods on linear dimensional changes of standardized simulated maxillary complete dentures.

Materials and methods: Thirty casts were made from a silicone mold representing an edentulous maxillary arch. Thirty identical maxillary dentures were made and randomly assigned to 3 test groups (A, B, C). In Group A, flasks were placed directly in pressure clamp after trial closure. Group B: The final closure was done in a hydraulic press then transferred to pressure clamp. Group C: After trial closure flask was positioned between the two iron plates of the Restriction System flask closure (RSFC) method. Then linear distances were measured three times before and after polymerization: right incisor to left incisor (RI-LI), right premolar to left premolar (RPM-LPM), right molar to left molar (RM-LM) and left incisor- to- left molar (LI-LM) and right incisor- to- right molar (RI-RM) with the help of digital caliper with an accuracy of 0.01mm. ANOVA and Tuckey's test were used to compare the groups (p < 0.05).

Results: Inter molar (LM-RM) width showed the greatest dimensional change after processing and Linear dimensions were not significantly influenced by the packing procedure.

Conclusion: Within the limitations of this study, Restriction System flask closure (RSFC) method demonstrated a similar performance in reducing the tooth movement when compared with other flask closure methods. The posterior region of the denture may present changes in the tooth position after processing, which need to be clinically adjusted.

Objective: This study aims to evaluate dental decay incidence and DMF index, plaque index and gingival index, and to assess the satisfaction/dissatisfaction in acrylic removal partial denture wearers (ARPD) and in partial edentate no wearers. It aims to improve the therapeutic management in prosthetic oral rehabilitation in DR Congo.

Material and methods: This prospective cohort interventional randomized study on 376 patients enrolled and divided into two groups (with and without denture prosthesis) was performed in University Clinics of Kinshasa, Kinshasa Medical Center and Clinic Glory during the period August 2008 to August 2010.

Results: Three hundred seventy-six patients (376) with 163 men (47 ± 16 years) and 213 women (42 ± 15 years) were followed. Of the 376 patients randomized, 189 were of "prosthesis" group and 187 were in the group "without aid". Both groups were regularly reviewed every 6 months for 2 years. Ten thousand four hundred and fifty-two (10452) teeth were examined (5149 teeth to the group "prosthesis" and 5303 for the teeth "without prosthesis" group. On hundred and twenty-nine (129) teeth that presented caries, 110 (82.96 per cent) are decayed teeth in the "prosthesis" group and 19 (17.04 per cent) are in the group "without prosthesis" (p = 0.00). The index Tooth Decayed, Missing, Filled (CAD) to start of the study for each group was 0.2. Two years after the index rose to 0.3 for the group "prosthesis" and remained steady (0.2) for the group "without prosthesis". The "prosthesis" group showed plaque index (PI) and gingival index (GI) above 0.99 (SD: ± 0.28) and 1.27 (SD: ± 0.43) than normal compared to those of the "no aid" group (0.46 ± 0.15 and 0.32 ± 0.12). The differences were statistically significant for both indices between the two groups (p = 0.00). Overall satisfaction rate for the "prosthesis" group was 26.4% while for the group "without prosthesis" satisfaction rate is 80.9%.

Conclusion: This study shows that improved oral hygiene and regular check of the RPD acrylic resin carriers become a concern for establishing a true oral health policy.