Background: The permanent or deciduous anterior teeth is a factor of integration in society and is considered as a discriminating character in the identification of the individual.

Aim: The aim of the study was to determine the coronal diameters of the deciduous incisivo-canine group of the Melano-African children from Cote D’Ivoire.

Methodology: The study involved 1790 deciduous anterior teeth of 366 arches casts of 183 Melano-African children from Cote d’Ivoire, aged from 2 ½ years to 8 ½ years, in stable deciduous and mixed teeth. The coronal diameters were measured at the axial and cervical surfaces by an operator and using a dry-tip compass, transferred to a graduated ruler followed by statistical analysis. A comparative analysis based on the reduced gap test formula compared the coronal diameters of the incisivo-canine group of the right and left hemispheres, also those of the two sexes. The significance test was equal to “t” >1.96 at the 0.05 threshold.

Results: The coronal diameters of the teeth of the incisivo-canine group do not show any statistical difference between the right and left sides. The diameters of the central incisors are statistically identical to those of the lateral incisors in both arches. In the maxilla, the canines are wider than the lateral incisors but identical to the central incisors. On the other hand, at the mandible, the canine has larger diameters than those of the central and lateral incisors. There is no statistical difference between the coronal diameters of the incisive-canine group of boys and girls at both the maxilla and mandible.

Conclusion: The deciduous canine is the widest tooth in the mandible and competes with the deciduous central incisor in the maxilla. The incisivo-canine group does not have any sexual differences.

Clinical significance: The use of dental materials of leucoderma subjects has led to many therapeutic failures in our clinical practices, due to their unsuitability and inapplicability in Melano-African children. This work will make it possible to establish real, precise, and specific standards for the African subject, which will be used to design dental materials that can be adapted for the Melano-African children in Cote d’Ivoire.

Keywords: African melanoderm, coronary diameters, Cote d’Ivoire, deciduous canine, deciduous incisor

How to cite this article: Kolomdou K, Manuel SDM, Boris K, Ramata B. Odontometry of deciduous anterior teeth of the melano-Ivorian subjects. Int Dent Med J Adv Res 2020;6:1-7.

Received 30 December 2019;

Accepted 05 May 2020

Background: New Delhi metallo-β-lactamase (NDM-1) encoding carbapenem resistance, in Gram-negative bacteria, is very common in Indian subcontinent that results in treatment failure, increased health-care cost, and high mortality rate.

Aim: The present study was conducted to determine the prevalence and susceptibility pattern of NDM-1-producing Klebsiella spp.

Materials and Methods: A total of 3265 clinical samples were processed for the isolation of carbapenemase-producing Klebsiella spp. and antibiotic susceptibility testing.

Results: Sixty-one (12.2%) NDM-1 producers were isolated from 502 Klebsiella species. All the NDM-1 producers were resistant to nearly all routine antibiotics.

Conclusion: NDM-1 gene encoding carbapenemase-producing bacteria were found to be resistant to nearly all routine antibiotics.

Clinical significance: The sample-wise distribution and susceptibility pattern of NDM-1-producing Klebsiella spp. will help clinicians for better treatment management and to develop effective hospital infection control policies.

Keywords: Carbapenemase, Klebsiella spp., New Delhi metallo-β-lactamase, polymerase chain reaction

How to cite this article: Kumar N, Aradhye S, Yadav S, Singh VA. Prevalence and antibiotic susceptibility pattern of clinically isolated New Delhi metallo-β-lactamase-producing Klebsiella spp. Int Dent Med J Adv Res 2020;6:1-3.

Received 03 December 2019;

Accepted 05 June 2020

Background: The problem with the connection of implant to natural teeth-supported prosthesis develops from the reality that the tooth and the osseointegrated implants have dissimilar mobility patterns and this may expose the implant to excessive load.

Aim: The purpose of this study was to evaluate the effect of metal and acetal removable partial denture (RPD) framework materials on the stresses around implant-supported RPDs.

Materials and Methods: The study was carried out on mandibular epoxy Class I partially edentulous models with two parallel implants placed at lower first molar area and according to framework materials, two groups were created: Group I: Acetal partial denture framework, Group II: Metallic partial denture framework, for both groups, acrylic record block was made and adjusted to apply occlusal force on the center of the metal plates, regarding the models from the right and left side, stress analysis images were recorded for both groups and for both sides at stresses from 20 to 100 newton, using photoelastic machine and mean stress values were recorded for both groups, tabulated, and statistically analyzed.

Results: There was a difference in significance between acetal and metallic partial denture frameworks where metallic partial denture framework showed higher stress fringes order around implant compared to acetal denture base.

Conclusions: Within the calibrations of this in vitro photoelastic analysis, it was concluded that acetal partial denture frameworks are preferred to use with implant-supported RPD when compared with metal partial denture frameworks, for the preservation of bone around implant.

Clinical significance: Acetal denture bases are the treatment of choice.

Keywords: Acetal denture bases, implant-supported removable partial denture, osseointegrated implants, removable partial denture frameworks

How to cite this article: Salah AM, Elsayed ME, Elmasry SM, Elmahdy MMB. Effect of metal and acetal removable partial denture frameworks on the stresses around implant-supported removable partial dentures. Int Dent Med J Adv Res 2020;6:1-5.

Received 15 December 2019;

Accepted 07 June 2020

Background: The effect of the applied forces on a dental implant depends on several factors which are related to each other from which are the duration, direction, and magnitude of the applied forces. Load transfer to the bone-implant interface relies on load type, geometry of the implant surface structure, as well as properties of the implant and denture material, reaching a beneficial stress level has been the target in different loading scenarios.

Aim: The present study aimed to evaluate the effect of implant’s angulation on the strains induced around implants in mandibular overdentures retained by two implants with ball attachments using nylon caps or retention sil 600 material.

Methodology: Clear acrylic resin model of a mandibular edentulous arch was made. Two implant beds were prepared at the canine regions using consecutive drills, the left side was held perpendicular to the occlusal plane and parallel to the midline while the right implant was drilled with a 15^° distal inclination. Two dental implants were inserted at the canine region bilaterally. A layer of resilient silicone soft lining material about 1.5 mm thickness was applied. The ball attachments were screwed into the corresponding implants with the nylon cap. Two linear strain gauges were attached using adhesive resin at the mesial and distal surfaces of the acrylic resin around each implant. The strain gauges were positioned on the crest of the ridge in a mesiodistal direction perpendicular to the long axis of each implant. A vertical static load of 100 N was applied on the metallic bar. Strains around implants were recorded on the mesial and distal sides after load application. The primer was left to dry and then the retention sil 600 paste was applied into the metal housings. Stresses induced around the implants were recorded. Statistical analysis was performed with SPSS.

Results: The vertically aligned implants had much less stresses than the distally inclined implants with statistically significant difference.

Conclusions: Retention sil 600 may induce less stresses than nylon caps around angled implants in mandibular implant-retained mandibular overdentures.

Clinical significance: Retention sil 600 should be considered over nylon caps around angled implants in mandibular implant-retained mandibular overdentures.

Keywords: Denture stress, Nylon Caps, Overdentures, Straight and Angulated Implants, Strain Gauges

How to cite this article: Abdel Aal MA. Stresses induced on straight and angulated implants using nylon caps and retention sil material in implant-retained mandibular overdentures (strain gauges analysis). Int Dent Med J Adv Res 2020;6:1-5.

Received 30 November 2019;

Accepted 20 March 2020

Background: The main risk factors related to oropharyngeal cancer (OFC) are tobacco and/or alcohol consumption, infectious agents, especially human papillomavirus, and others like dietary factors. The high intake of fruits, especially citrus fruit, and vegetables protects against OFC, while the consumption of processed meat and animal fats increases this risk.

Aim: This study aims to assess the possible influence of the diet on the OFC risk.

Methodology: A search for articles on OFC and diet was performed in the following electronic databases: PubMed (MEDLINE, Cochrane Library), Web of Science (WoS), and Spanish Medical Index (IME). From 125 potentially eligible articles, 111 were excluded for several reasons: Articles without full-text availability (45), studies with a sample size fewer than 100 subjects (16), studies in tumors with a location other than oral cavity and pharynx (11), studies carried out on patients with potentially malignant disorders (4), and studies without usable data (35). Finally, 14 studies were included in this meta-analysis. The data were analyzed using statistical software RevMan 5.3 (The Cochrane Collaboration, Oxford, UK). For dichotomous outcomes, the estimates of effects of an intervention were expressed as odds ratio (OR) using the Mantel-Haenszel (M-H) method with 95% confidence intervals.

Results: High consumption of the following foods reduced the probability of OFC: Vegetables (49%, P < 0.001), fruits (47%, P < 0.001), carrots (34%, P < 0.01), and pulses (13%, P = 0.02), but not significantly for fish (11%, P = 0.39) and dairy products (8%, P = 0.62). On the contrary, there was an increased risk of OFC with the consumption of bread (OR: 1.42, P < 0.01) or meat (OR: 1.36, P < 0.01), but not significantly for eggs (OR: 1.50, P = 0.10), pasta (OR: 1.24, P = 0.44), potatoes (OR: 1.12, P = 0.44), and cheese (OR: 1.12, P=0.61).

Conclusions: The consumption of vegetables, fruits, and pulses was foods with a protective effect against OFC.

Clinical significance: Dietary changes toward a healthier diet are an effective measure to prevent OFC.

Keywords: Case–control studies, Diet, Food, Mouth neoplasms, Risk factors

How to cite this article: Rodriguez-Archilla A, Calderer- Ortiz M. Influence of diet on oropharyngeal cancer: A metaanalysis. Int Dent Med J Adv Res 2020;6:1-5.

Received 12 April 2020;

Accepted 05 July 2020