Editorial

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Open AccessEditorial

Advances in Implant Dentistry—A Special Issue of Dentistry Journal

by Bernhard Pommer

Dent. J. 2015, 3(4), 132; https://doi.org/10.3390/dj3040132 - 02 Nov 2015

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New knowledge is developing at a rapidly increasing rate in implant dentistry, as in other areas of medicine. [...] Full article

(This article belongs to the Special Issue Advances in Implant Dentistry)

Research

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Open AccessArticle

Marginal Vertical Fit along the Implant-Abutment Interface: A Microscope Qualitative Analysis

by Nicola Mobilio, Alberto Fasiol, Giulio Franceschetti and Santo Catapano

Dent. J. 2016, 4(3), 31; https://doi.org/10.3390/dj4030031 - 06 Sep 2016

Cited by 7 | Viewed by 4441

Abstract

The aim of this study was to qualitatively evaluate the marginal vertical fit along two different implant-abutment interfaces: (1) a standard abutment on an implant and (2) a computer-aided-design/computer-aided-machine (CAD/CAM) customized screw-retained crown on an implant. Four groups were compared: three customized screw-retained [...] Read more.

The aim of this study was to qualitatively evaluate the marginal vertical fit along two different implant-abutment interfaces: (1) a standard abutment on an implant and (2) a computer-aided-design/computer-aided-machine (CAD/CAM) customized screw-retained crown on an implant. Four groups were compared: three customized screw-retained crowns with three different “tolerance” values (CAD-CAM 0, CAD-CAM +1, CAD-CAM −1) and a standard titanium abutment. Qualitative analysis was carried out using an optical microscope. Results showed a vertical gap significantly different from both CAD-CAM 0 and CAD-CAM −1, while no difference was found between standard abutment and CAD-CAM +1. The set tolerance in producing CAD/CAM screw-retained crowns plays a key role in the final fit. Full article

(This article belongs to the Special Issue Advances in Implant Dentistry)

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1127 KiB

Open AccessArticle

Fatigue of Dental Implants: Facts and Fallacies

by Keren Shemtov-Yona and Daniel Rittel

Dent. J. 2016, 4(2), 16; https://doi.org/10.3390/dj4020016 - 24 May 2016

Cited by 40 | Viewed by 7687

Abstract

Dental implants experience rare yet problematic mechanical failures such as fracture that are caused, most often, by (time-dependent) metal fatigue. This paper surveys basic evidence about fatigue failure, its identification and the implant’s fatigue performance during service. We first discuss the concept of [...] Read more.

Dental implants experience rare yet problematic mechanical failures such as fracture that are caused, most often, by (time-dependent) metal fatigue. This paper surveys basic evidence about fatigue failure, its identification and the implant’s fatigue performance during service. We first discuss the concept of dental implant fatigue, starting with a review of basic concepts related to this failure mechanism. The identification of fatigue failures using scanning electron microscopy follows, to show that this stage is fairly well defined. We reiterate that fatigue failure is related to the implant design and its surface condition, together with the widely varying service conditions. The latter are shown to vary to an extent that precludes devising average or representative conditions. The statistical nature of the fatigue test results is emphasized throughout the survey to illustrate the complexity in evaluating the fatigue behavior of dental implants from a design perspective. Today’s fatigue testing of dental implants is limited to ISO 14801 standard requirements, which ensures certification but does not provide any insight for design purposes due to its limited requirements. We introduce and discuss the random spectrum loading procedure as an alternative to evaluate the implant’s performance under more realistic conditions. The concept is illustrated by random fatigue testing in 0.9% saline solution. Full article

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A Simplified Technique for Implant-Abutment Level Impression after Soft Tissue Adaptation around Provisional Restoration

by Ahmad Kutkut, Osama Abu-Hammad and Robert Frazer

Dent. J. 2016, 4(2), 14; https://doi.org/10.3390/dj4020014 - 24 May 2016

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Abstract

Impression techniques for implant restorations can be implant level or abutment level impressions with open tray or closed tray techniques. Conventional implant-abutment level impression techniques are predictable for maximizing esthetic outcomes. Restoration of the implant traditionally requires the use of the metal or [...] Read more.

Impression techniques for implant restorations can be implant level or abutment level impressions with open tray or closed tray techniques. Conventional implant-abutment level impression techniques are predictable for maximizing esthetic outcomes. Restoration of the implant traditionally requires the use of the metal or plastic impression copings, analogs, and laboratory components. Simplifying the dental implant restoration by reducing armamentarium through incorporating conventional techniques used daily for crowns and bridges will allow more general dentists to restore implants in their practices. The demonstrated technique is useful when modifications to implant abutments are required to correct the angulation of malpositioned implants. This technique utilizes conventional crown and bridge impression techniques. As an added benefit, it reduces costs by utilizing techniques used daily for crowns and bridges. The aim of this report is to describe a simplified conventional impression technique for custom abutments and modified prefabricated solid abutments for definitive restorations. Full article

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Review

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Open AccessReview

Immediate Implants: Clinical Guidelines for Esthetic Outcomes

by Mohammad A. Javaid, Zohaib Khurshid, Muhammad S. Zafar and Shariq Najeeb

Dent. J. 2016, 4(2), 21; https://doi.org/10.3390/dj4020021 - 13 Jun 2016

Cited by 17 | Viewed by 5722

Abstract

Research has shown that tooth loss results in morphological changes in alveolar ridge that may influence the subsequent implant placement. Immediate implant placement was introduced as a possible means to limit bone resorption and reduce the number of surgical procedures following tooth extraction. [...] Read more.

Research has shown that tooth loss results in morphological changes in alveolar ridge that may influence the subsequent implant placement. Immediate implant placement was introduced as a possible means to limit bone resorption and reduce the number of surgical procedures following tooth extraction. Histological and clinical evidence from human clinical studies showing efficacy of immediate implants has come to light over the last decade or so. However, immediate implant placement is a challenging surgical procedure and requires proper case selection and surgical technique. Furthermore, there appears to be a lack of clinical guidelines for immediate implant placement case selection. Therefore, the aim of this mini-review is to analyze critical evidence from human studies in order to establish clinical guidelines which may help clinicians in case selection when considering immediate implant placement protocol. Full article

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Open AccessReview

The Overall Survival, Complication-Free Survival, and Related Complications of Combined Tooth-Implant Fixed Partial Dentures: A Literature Review

by Peter Borg, James Puryer, Lisa McNally and Dominic O’Sullivan

Dent. J. 2016, 4(2), 15; https://doi.org/10.3390/dj4020015 - 25 May 2016

Cited by 7 | Viewed by 7638

Abstract

This paper reviews the literature regarding possible complications, complication-free survival, and overall survival of fixed dental prostheses that use both implants and natural teeth as abutments. The paper also provides clinical guidelines for treatment based on this literature review. An electronic search utilizing [...] Read more.

This paper reviews the literature regarding possible complications, complication-free survival, and overall survival of fixed dental prostheses that use both implants and natural teeth as abutments. The paper also provides clinical guidelines for treatment based on this literature review. An electronic search utilizing the MEDLINE, BIOSIS Citation Index, and Web of Science™ Core Collection databases was undertaken, and a review of the 25 selected texts studying 22 different patient cohorts was carried out. From a total of 1610 implants reviewed, 40 were lost (33 due to loss of integration and 7 due to fracture), whereas, out of a total of 1301 teeth, 38 were lost, of which 16 were due to fracture. Seventy-three cases of tooth intrusion were detected. From a total of 676 frameworks reviewed (metal n = 645, Zirconia n = 31), 7 fractured, while veneer material fracture occurred in 70 out of 672 bridges. Overall, 502 out of 531 tooth-implant fixed prostheses (TIPFs) remained functional, and 336 out of 439 prostheses showed no technical or biological complications and remained functional. Rigid TIFPs permanently cemented to teeth with sufficient coronal structure and with limited use of prosthetic attachments offer a good long-term treatment option to patients with good oral hygiene following sound implant placement. This mode of treatment should be used when free-standing implant-supported options may not be possible. Larger randomized control studies and other clinical studies comparing tooth-to-implant-connected treatment with other forms of treatment are needed to better understand the place of TIFP treatment in oral rehabilitation. Full article

(This article belongs to the Special Issue Advances in Implant Dentistry)

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Open AccessReview

Hot Topics in Clinical Oral Implants Research: Recent Trends in Literature Coverage

by Vesela Valkova, Ceeneena Ubaidha Maheen, Bernhard Pommer, Xiaohui Rausch-Fan and Rudolf Seeman

Dent. J. 2016, 4(2), 13; https://doi.org/10.3390/dj4020013 - 24 May 2016

Cited by 2 | Viewed by 6177

Abstract

This systematic review looks at thematic trends in clinical research publications on dental implants. For this purpose, MEDLINE electronic searches as well as additional hand searches of six main journals in the field were conducted. A total of 2875 clinical studies published between [...] Read more.

This systematic review looks at thematic trends in clinical research publications on dental implants. For this purpose, MEDLINE electronic searches as well as additional hand searches of six main journals in the field were conducted. A total of 2875 clinical studies published between 2001 and 2012 met the inclusion criteria and were subjected to statistical analysis. Hot topics in dental implant literature included immediate loading (14.3%), bone substitutes (11.6%), cross-arch full bridges (8.0%), and immediate implant placement (7.5%). A significant increase in scientific interest for immediate loading (+6.3%, p = 0.001), platform switching (+2.9%, p = 0.001), guided implant surgery (+1.9%, p = 0.011), growth factors (p = 0.014, +1.4%), piezoelectric surgery (+1.3%, p = 0.015), and restorative materials (+0.7%, p = 0.011) was found. A declining scientific interest in onlay grafting (−0.3%, p = 0.042) was recorded. The findings regarding current clinical oral implants research tie in with better-informed consumers and increased patient demands. Our results demonstrate an increasing interest in techniques that avoid complicated procedures such as bone grafting and that reduce treatment duration. Full article

(This article belongs to the Special Issue Advances in Implant Dentistry)

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Other

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Open AccessCase Report

Magnet-Retained Two-Mini-Implant Overdenture: Clinical and Mechanical Consideration

by Yuichi Ishida, H. S. Kiran Kumar, Takaharu Goto, Megumi Watanabe, Rudi Wigianto and Tetsuo Ichikawa

Dent. J. 2016, 4(4), 35; https://doi.org/10.3390/dj4040035 - 10 Oct 2016

Cited by 1 | Viewed by 10497

Abstract

Two-implant overdentures have become the accepted treatment for restoring mandibular edentulism. The dimensions of regular implants sometimes limit their use, such as in the case of narrow ridges. Mini-implants with reduced diameters (less than 3.0 mm) enable insertion into narrow ridges. A magnet-retained [...] Read more.

Two-implant overdentures have become the accepted treatment for restoring mandibular edentulism. The dimensions of regular implants sometimes limit their use, such as in the case of narrow ridges. Mini-implants with reduced diameters (less than 3.0 mm) enable insertion into narrow ridges. A magnet-retained two-mini-implant overdenture system was developed and is described in this paper. Additionally, we describe a clinical mandibular procedure using the system and evaluate its biomechanical performance. Full article

(This article belongs to the Special Issue Advances in Implant Dentistry)

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