Journal of Dental Implants
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   Table of Contents - Current issue
Coverpage
January-June 2019
Volume 9 | Issue 1
Page Nos. 1-47

Online since Monday, June 17, 2019

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EDITORIAL  

Success or survival: Which race to win? p. 1
Sharat Shetty
DOI:10.4103/jdi.jdi_15_19  
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ORIGINAL ARTICLES Top

TTPHIL-ALL TILT™ – An effective technique for loading of dental implants: A comparative study of stress distribution in maxilla using finite element analysis p. 4
P Venkat Ratna Nag, P Sarika, Ruheena Khan, Tejashree Bhagwatkar
DOI:10.4103/jdi.jdi_18_18  
Objectives: The key objective of the study is to compare the influence of stress on the bone after placement of dental implants using three alternative techniques viz., (i) All-on-4 (2 straight and 2 distally tilt implants) (ii) All-on-6 (6 straight implants) and (iii) All-Tilt-6 (6 tilted implants under the TTPHIL-ALL TILT technique) for rehabilitation of moderate atrophic maxilla. Materials and Methods: Three dimensional Finite Element Model has been deployed in the study to compare stress distribution on bone using All-on-4, All-on-6, All-Tilt-6 technique. In the Finite Element Analysis, vertical loads of 150N on lateral incisor/canine, second premolar and second molar area were applied for analysis of von Mises stress distribution on the crestal cortical bone, cancellous bone and basal cortical bone. Results: von Mises stress shows higher values on Crestal cortical bone, Basal cortical bone and Cancellous bone for 'All-on-4' and 'All-on-6' concept. It is comparatively less for'All-Tilt-6' concept. Conclusion: TTPHIL-ALL TILT (Tall Tilted Pin Hole Immediate Loading) concept is a novel technique which is derived from the 'tilted implant concept' in which bicortical engagement of implant transfers less stress on the bone with reduced chances of bone resorption, failures and no cantileverage.
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Comparative evaluation of various methods of assessing residual alveolar ridge width prior to dental implant placement: An in vivo study p. 12
FB Sutaria, DN Shah, CJ Chauhan, JS Solanki, KA Bhatti
DOI:10.4103/jdi.jdi_19_17  
Purpose: There is always a slow but steady evolution occurred in dentistry, resulting in use of osseointegrated dental implants which became widely accepted procedure in the rehabilitation of edentulous spaces. Evaluation of the available alveolar bone dimensions is an important prerequisite for dental implant placement and successful outcome. Hence, this vivo study was designed to evaluate the accuracy of cone beam computed tomography (CBCT) and bone mapping for the diagnostic purpose. Materials and Methods: A total of 27 partially edentulous sites in maxilla and/or mandibular arch were selected according to the mentioned criteria. The width of edentulous spaces was measured and compared by three methods: CBCT, bone mapping, and surgical exposure. Later, the obtained data were sent for statistical analysis to check the accuracy of methods for the assessment of residual alveolar ridge width prior to the dental implant placements. Results: Normality check was done before finalizing statistical tests using Kolmogorov–Smirnov and Shapiro–Wilk test and non-parametric tests were applied for final analysis. Variables were compared using the Wilcoxon signed-Rank Test. Spearman's Rank correlation was obtained to check the relationship between variables. Throughout the result, significance level was fixed at 5% and if value of P < 0.05, it shows a significant result. For this study, P < 0.05 and statistically significant, which show that average measurements are significantly differ between the variables. Conclusion: CBCT and ridge mapping measurements when compared individually with the gold standard, surgical open method, CBCT proved to be a highly accurate method detecting the residual alveolar ridge width in the dental implant treatment planning.
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Effect of a preseating cementation protocol on the retention of implant restorations using a definitive cement p. 20
Rodrigo A Jimenez, Karla García-Camacho, Shirley Mora-Loaiza, Mauricio Quesada-Solís, Tatiana Vargas-Koudriavtsev
DOI:10.4103/jdi.jdi_7_19  
Purpose: This investigation analyzed the effects of a preseating cementation protocol on the amount of cement excess at the crown margin and its associated tensile load using a glass ionomer definitive cement. Materials and Methods: The independent variable in this study was the cementation technique. The first protocol involved a conventional cementation procedure and the second one preseating on an abutment replica. Ten metallic copings were cemented using a definitive cement on ten implant abutments for each cementation protocol. Cement excess at the margin was weighted (mg), and axial tensile load was measured 24 h after cementation. Results were statistically analyzed using linear regression and one-way analysis of variance (α = 0.05). Results: The cementation protocol with preseating resulted in a significantly smaller amount of cement excess at the crown margin (P ≤ 0.001) without detriment on the tensile resistance when compared to the experimental group without preseating (P = 0.41). Linear regression failed to prove any correlation between the amount of cement excess and tensile load necessary for dislodgement. Conclusions: A preseating protocol can be performed when using a definitive cement. This procedure reduces significantly the amount of cement excess at the margin while maintaining an acceptable tensile load resistance.
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Comparison between all zirconia, all PEEK, and zirconia-PEEK telescopic attachments for two implants retained mandibular complete overdentures: In vitro stress analysis study p. 24
Radwa M Emera, Gilan Y Altonbary, Samah A Elbashir
DOI:10.4103/jdi.jdi_6_19  
Aim: This in vitro study was performed to evaluate and compare stresses applied to the implants retaining mandibular complete overdenture with telescopic attachments of different materials. Materials and Methods: Three identical clear acrylic resin models of completely edentulous mandibular arch were selected for this study. One implant was installed in each canine region of each model. The models were scanned to design telescopic attachment using computer-aided design/computer-aided manufacturing technology. According to material used for telescopic attachments fabrication, models were categorized as follows: All Zirconia (ZrO2) telescopic group (zz): Primary and secondary crowns were made of ZrO2, all polyetheretherketone (PEEK) telescopic group (pp): Primary and secondary crowns were made of PEEK, and Zirconia-PEEK telescopic group (zp): Primary crown was made of ZrO2, and secondary one was made of PEEK. Three identical mandibular complete overdentures were constructed. The secondary telescopic crowns were picked up within the intaglio surface of each overdenture. Four strain gauges were installed parallel to each implant. Bilateral and unilateral loads were applied, and strain values were recorded. Results: Comparison of recorded stresses values revealed a significant difference between groups where the highest stresses were recorded with all-PEEK group, followed by all-zircon group and the lowest stresses were noted with Zirconia-PEEK group for both bilateral and unilateral loading tests. Conclusion: Within the limitation of this in vitro study, it could be concluded that: telescopic attachments that fabricated from ZrO2 primary crown and PEEK secondary crown is a promising attachment regarding reductions of stresses transmitted to the implants retaining mandibular complete overdenture.
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Patient awareness and perceived cost of dental implants for replacement of missing teeth: A survey in an Indian metropolitan population p. 30
Ninad Milind Padhye, Prasad Diwakar Bhange, Lopa Kishor Mehta, Sonika M Khimani
DOI:10.4103/jdi.jdi_1_19  
Aim: Implant dentistry has gained immense popularity in the field of oral rehabilitation. However, a lack of patient awareness about the procedure, its advantages, and limitations results in a lack of their active participation in the treatment plan. The aim of this study was, with the help of a questionnaire, to assess up-to-date patients' perspectives on dental implants and its cost. Materials and Methods: A questionnaire-based survey of 14 questions was distributed among 1000 randomly selected participants attending ten private clinics in the city of Mumbai, India. Frequencies and percentages of the responses were tabulated and calculated. Results: Among the participants of the survey, 90.5% were of the opinion that missing teeth should be replaced, but only 53.6% were aware about dental implants. About 65.7% of these individuals received information about dental implants from dentists and 42.3% considered the implant to last for a lifetime. About 39.4% of the participants thought that the biggest advantage of the implant was a fixed replacement to a missing tooth, whereas the high cost associated with the procedure was the biggest disadvantage as considered by 43.7% of participants. A majority of them (75.9%) expressed that treatment was nonaffordable; however, they were willing to learn more about the treatment modality. Conclusion: The survey concluded that 53.6% of the Indian metropolitan population had heard about dental implants as a treatment option but considered it expensive. Improved doctor–patient communication would be needed to avoid misconceptions regarding the implant therapy and the cost associated with it.
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CASE REPORTS Top

An impression technique to accurately register peri-implant soft tissue in single- and multi-unit implant restorations p. 37
Payal Rajender Kumar, Udatta Kher, Ali Tunkiwala
DOI:10.4103/jdi.jdi_20_18  
Tooth replacement in the esthetic zone presents a challenging situation for the clinician. Contouring the soft-tissues around single- and multi-unit unit implant restoration is critical to achieving an esthetically pleasing final restoration. Duplicating the emergence profile is equally important for effective communication between the clinician and laboratory technician. This article presents a simple, quick, and convenient impression technique for easy and accurate transfer of the tissue contours to the working cast. This precludes the step of doing the jig trial resulting in a decrease in overall treatment time.
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Root-supported overdenture as a prosthetic alternative for patients undergoing the transitional phase from partial to complete edentulism p. 41
Rodolfo Bruniera Anchieta, Isis Almela Endo Hoshino, Amilcar Chagas Freitas Júnior, Erika Oliveira de Almeida, Eduardo Passos Rocha, Wirley Gonçalves Assunção
DOI:10.4103/jdi.jdi_17_18  
The objecitve of present article, is show through a clinical case the importance of preserving te remaining teeth in oral rehabilitation of elderly people, durinf the transitional phase from partial to complete edentulism. After careful planning, prosthetic rehabilitation was developed with the use of the remaining teeth that had excellent bone and periodontal implantation. In addition to root-supported overdenture provide better retention, stability, and comfort when compared to conventional full dentures, also help in the preservation of the alveolar ridge in the long term. The maintenance of the remaining roots for fabrication of overdentures allows future treatment with osseointegrated implants without the need for invasive surgical procedures for reconstruction.
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LETTER TO EDITOR Top

Dental implant identification, numbering, and nomenclature system: The need of the hour p. 46
Deepak Sharma, Pravesh Kumar Jhingta
DOI:10.4103/jdi.jdi_4_19  
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