Linking periodontitis and adverse pregnancy outcomes through CD14+ CD16+ monocytes

One of the prevalent medical issues that deserve global attention is adverse pregnancy outcomes and preterm low birth weight deliveries which have a significant impact on neonatal health. Periodontitis has been implicated as a significant risk factor for adverse effects in pregnancy. Elevated levels of periodontal pathogenic bacteria and proinflammatory cytokines which are pathognomonic features of periodontitis are believed to cause placental infection and premature rupture of the amniotic membrane consequently leading to preterm delivery. The role of CD14+CD16+ monocytes as a causal link between periodontitis and adverse pregnancy outcomes has not been researched so far, although an elevation of these cells has been independently demonstrated in both conditions. With the available background information, this hypothesis attempts to derive a mechanistic link between periodontitis and adverse pregnancy outcomes through the participation of CD14+CD16+ monocytes.

Implant Insertion Torque Load Analysis for Mandible using CBCT Images

Introduction

Osteoporotic patients require particular attention to their implant site bone quality as an indication of prognosis and may require modified surgical technique Insertion Torque (IT).

Aim

It is the purpose of this study to test whether IT is significantly correlated with bone density or not, as assessed by the cone-beam computed tomography (CBCT) in a group of osteopenic and osteoporotic patients.

Materials and methods

A total of 30 patients were included in the study. The mandibular second premolar region was chosen as the site of investigation to prevent variability in surgical implant placement technique in different locations affecting bone mineral density (BMD). Partially, edentulous female patients between 51 and 60 years of age who were scheduled to receive implant placement were recruited for the study. CBCT (Master Series 3D Dental Imaging) was used for preoperative evaluation of the jaws for each patient. Materialise's Interactive Medical Image Control System (MIMICS) was used to process stacks of 2D images from CBCT. Finite element analysis were carried out on bone using Ansys software. Maximum displacement and maximum stress—strain patterns were compared in normal, osteoporotic, and osteopenic groups.

Results

The difference in mean bone density in all three groups were statistically significant (p < 0.05) (Table 1). FEA at 32, 36, 40 N in all 3 groups was statistically significant. (Table 2).

Conclusion

Within the limitations of the study, the amount of stress—strain that exhibits at 40 N load in normal bone will be almost the same stress—strain given at 32 N load in osteoporotic bone. Normal IT load analysis exhibits more stress/strain in osteoporotic patients when compared with other groups, showing that IT must be achieved to an optimum level to avoid further complication and failures.

How to cite this article

Venkatakrishnan CJ, Bhuminathan S, Chandran CR. Implant Insertion Torque Load Analysis for Mandible using CBCT Images. World J Dent 2017;8(3):183-189.

Management of long span partially edentulous maxilla with fixed removable denture prosthesis

Restoration of a long span partially edentulous maxilla with tooth supported prosthesis is challenging because of inherent anatomic limitations and unfavourable biomechanics present after the loss of teeth. A tooth supported fixed-removable prosthesis is a treatment option for restoration of such long span partially edentulous maxillary arches. This prosthesis meets the requirements for esthetics, phonetics, comfort, and hygiene, as well as favourable biomechanical stress distribution to the remaining natural tooth abutments. This article presents a procedure for fabrication of a fixed-removable prosthesis that has cement-retained custom cast bar metal substructure and a ball attachment retained removable superstructure prosthesis.

Bibliometric study of publication by Indian prosthodontists between 1996-2007: a medline approach

Bibliometric study of a subject will help administrators and policy makers to frame policies for the growth of the subject. Prosthodontics is an integral part of dental sciences and no bibliometric study has been done on Indian prosthodontics publications. Publications from Indian Dental establishments during 1996-2007 were collected from Medline and data were collected. First author's affiliations were only considered. Publications by prosthodontists were considered for this study.

PREDICTOR VARIABLES

year, number of author, state

OUTCOME VARIABLES

type and reach of journal, type of article. There were 43 articles fulfilling the criteria. Prosthodontist from nine different states published in 12 different journals. Thirteen (30.2 %) were case reports, 23 (53.5 %) were research, 4 (9.3 %) were reviews and 3 (7 %) were technical note. The inter-annual variation between the type and reach of article and type of articles is presented. The growth trend analysis was performed and predictions are presented. Prosthodontist exhibited a trend to publish in general dental journals, publish case reports, in international journals. The mean numbers of authors in each type are discussed. The potential use of this data are discussed.