Online ISSN: 2515-8260

Keywords : Bone Density


A Prospective Study to Evaluation of Design Parameters of Short Dental Implants on Stress Distribution in D2 Bone Quality Under Immediate Loading-A 3D FEA

Rajendra Yadav, Pankaj Chauhan, Akanksha Katewa, Pradeep Kumar

European Journal of Molecular & Clinical Medicine, 2022, Volume 9, Issue 3, Pages 2331-2339

Background: Implant stability is influenced by a combination of surface topography and macroscopic levels of implant design. In reduced bone height situations, short implants are often considered a viable alternative to long implants, which often require additional augmentation procedures. The objective of this finite element study was to evaluate the peri-implant Von Mises stresses, strains and micro movements distribution in D2 bone quality around short implants of 6mm length with varying diameters of 4mm, 5mm and 6mm and different thread designs under immediate loading.
Materials& Methods: The study was conducted to evaluate the Von Mises stress, strain and micro movements distribution in D2 bone quality under immediate loading at department of periodontis at Rajasthan Dental College & Hospital, Jaipur, Rajasthan. 3D FEM were developed to simulate mandibular molar crown, supported by an implant of 6mm length with variation of different diameter and thread designs. The material properties were derived from other studies 32 and assigned to the models. The modeling analyses were accomplished using a software program SPSS version 22.0.
Results: When all the three diameters were compared wide diameter i.e. 6mm diameter implants had the least values of peri-implant von mises stresses, strains and micro movements around them. When thread shapes were taken into consideration the buttress thread created the most favourable stress parameters around them with minimum values of stress, strains and micro movements.
Conclusion: Short implants combined with a wide diameter and platform switching can be used in atrophic ridges or when there is a need of extensive surgery to prepare the implant site. Further randomized clinical trials are required to validate the results of this study.

Osseo-Densification : A New Method For Bone Preservation

Dr. Kiran Sethiya; Dr. P. V. Dhadse

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 1738-1743

Presently, the replacing of missing tooth via dental implants has become a widespread treatment modality. Dental implants inserted at the posterior region of the maxilla exhibit the lowest success rates as the low density bone in this area often jeopardize rigid fixation of the implant. For long-lasting clinical outcome of implant therapy it is necessary to achieve primary implant stability osseointegration. Other factors, such as bone quality and quantity, surgical techniques are important for achieving primary stability. Maintaining sufficient bone density and bone bulk are also essential factors to achieve bone-to-implant contact for obtaining a biomechanically stable implant. Recently, a new technique is developed which enhances the bone density around dental implants known as Osseodensification (OD), that creates an autograft layer of condensed bone at the periphery of the implant bed by the aid of specially designed burs rotating in a clockwise and anti-clockwise direction. This relatively new concept with universally compatible drills has been proposed to help in better osteotomy preparation, bone densification, and indirect sinus lift and also achieve bone expansion at different sites of varying bone densities. This procedure has also shown improvement in achieving better implant primary stability and better osteotomy than conventional implant drills. Numerous studies have been performed on this new surgical technique. The purpose of this review article is to discuss in detail on OD procedure.

RELATION BETWEEN PRIMARY STABILITY AND BONE DENSITY -A RETROSPECTIVE STUDY

Thanish Ahamed. S; Subhashree R; Mebin George Mathew

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 1, Pages 2023-2032

The use of dental implants has gained immense popularity and inside acceptance. A secure implant primary stability is positively associated with a successful implant integration and long-term successful clinical outcome. The aim of this study was to assess the effect of primary stability in success of dental implants. The present retrospective study was conducted among 1263 patients who had undergone implant therapy in the Department of Implantology, Saveetha Dental College and Hospitals, Chennai from June 2019 to March 2020. Data regarding bone type, bone density of the implant site were collected and analysed. In the present study, most of the type of bone density seen commonly was D2 bone and around 42.79% of the patients had D2 type of bone density in the lower posterior region. The next commonly seen bone density was D1 and in the lower posterior and lower anterior region with 8.51% and 2.36% respectively. In association with the gender and the bone density males had more bone density than females. Most of the type of bone density seen was D2 ( 34.12% in males and 30.58% in females, followed by D1 type of bone density ( 6.93% in males and 6.62% in females). Positive correlation was obtained between bone density and primary implant stability. The correlation was found to be statistically significant (p=0.000). The present study showed a strong relationship between bone density and the primary implant stability.