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https://www.readbyqxmd.com/read/29351113/fatigue-failure-of-external-hexagon-connections-on-cemented-implant-supported-crowns
#1
João Malta Barbosa, Daniel Navarro da Rocha, Ronaldo Hirata, Gileade Freitas, Estevam A Bonfante, Paulo G Coelho
PURPOSE: To evaluate the probability of survival and failure modes of different external hexagon connection systems restored with anterior cement-retained single-unit crowns. The postulated null hypothesis was that there would be no differences under accelerated life testing. MATERIALS AND METHODS: Fifty-four external hexagon dental implants (∼4 mm diameter) were used for single cement-retained crown replacement and divided into 3 groups: (3i) Full OSSEOTITE, Biomet 3i (n = 18); (OL) OEX P4, Osseolife Implants (n = 18); and (IL) Unihex, Intra-Lock International (n = 18)...
January 17, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29351052/particulate-coral-hydroxyapatite-sheltered-by-titanium-mesh-for-localized-alveolar-rehabilitation-after-onlay-graft-failure-a-case-report
#2
Miao Zhou, Shuyi Li, Hendrik Terheyden, Shuaishuai Cao, Yuejuan Che, Yuanming Geng
Reconstruction of bone loss in the alveolar ridge has long been challenging. Autologous bone grafts are considered as the "golden standard", while little research has focused on how to repair pronounced alveolar bone defects after autologous bone graft failure. The aim of this study was to detail a method based on the titanium mesh technique coupled with particulate coral hydroxyapatite to solve the Onlay graft failure. With bone deficiency in the #11 and #24- #25 regions, we harvested two autologous bone blocks for reconstruction...
January 19, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29351041/a-new-technique-in-alveolar-cleft-bone-grafting-for-dental-implant-placement-in-patients-with-cleft-lip-and-palate
#3
Vo Van Nhan, Le Van Son, Ta Anh Tuan, Nguyen Tai Son, Trinh Dinh Hai, Le Duc Lanh, Nguyen Manh Ha, Lam Dai Phong
OBJECTIVE: To evaluate 2 iliac corticocancellous-block grafting techniques for dental implant placement in residual alveolar clefts. DESIGN: Nonrandomized prospective clinical trial between March 2010 and December 2014. SETTING: National Hospital of Odonto-Stomatology, Hanoi, Vietnam. PARTICIPANTS: Thirty-two patients (23 female, 9 male; mean age, 21.28 years; range, 16-31 years) with unilateral complete alveolar cleft after reconstructive surgery for cleft lip and palate (CLP)...
February 2018: Cleft Palate-craniofacial Journal
https://www.readbyqxmd.com/read/29349910/accuracy-of-a-new-elastomeric-impression-material-for-complete-arch-dental-implant-impressions
#4
Mirza R Baig, Muaiyed M Buzayan, Norsiah Yunus
AIM: The aim of the present study was to assess the accuracy of multi-unit dental implant casts obtained from two elastomeric impression materials, vinyl polyether silicone (VPES) and polyether (PE), and to test the effect of splinting of impression copings on the accuracy of implant casts. METHODS: Forty direct impressions of a mandibular reference model fitted with six dental implants and multibase abutments were made using VPES and PE, and implant casts were poured (N = 20)...
January 18, 2018: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29349884/report-of-a-human-autopsy-case-in-maxillary-sinuses-augmented-using-a-synthetic-bone-substitute-micro-computed-tomographic-and-histologic-observations
#5
Jung-Seok Lee, Jae-Kook Cha, Daniel S Thoma, Ui-Won Jung
OBJECTIVE: This study of a human autopsy case aimed to characterize the histologic and micro-computed tomographic results of maxillary sinus augmentation using a synthetic bone substitute and simultaneous implant placement at 6 years. MATERIAL AND METHODS: This report is based on the whole-body donation of a 62-year-old male patient who died due to bladder cancer. Implants had been placed in conjunction with sinus augmentation using a mixture of biphasic calcium phosphate and autogenous bone into both maxillary sinuses 6 years prior to the body donation...
January 18, 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29349504/oral-bacterial-colonization-on-dental-implants-restored-with-titanium-or-zirconia-abutments-6-month-follow-up
#6
Alice Ramos de Freitas, Thalisson Saymo de Oliveira Silva, Ricardo Faria Ribeiro, Rubens Ferreira de Albuquerque Junior, Vinícius Pedrazzi, Cássio do Nascimento
OBJECTIVE: This investigation aimed to characterize in a 6-month follow-up the microbial profile of implants restored with either titanium or zirconia abutments at the genus or higher taxonomic levels. METHODS: Twenty healthy individuals indicative for implant-retained single restorations were investigated. Half of participants were restored with titanium and half with zirconia abutments. Biofilm was collected from the implant-related sites after 1, 3, and 6 months of loading...
January 18, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29348112/comparing-short-dental-implants-to-standard-dental-implants-protocol-for-a-systematic-review
#7
Amir Reza Rokn, Abbasali Keshtkar, Abbas Monzavi, Kazem Hashemi, Tahereh Bitaraf
BACKGROUND: Short dental implants have been proposed as a simpler, cheaper, and faster alternative for the rehabilitation of atrophic edentulous areas to avoid the disadvantages of surgical techniques for increasing bone volume. OBJECTIVE: This review will compare short implants (4 to 8 mm) to standard implants (larger than 8 mm) in edentulous jaws, evaluating on the basis of marginal bone loss (MBL), survival rate, complications, and prosthesis failure. METHODS: We will electronically search for randomized controlled trials comparing short dental implants to standard dental implants in the following databases: PubMed, Web of Science, EMBASE, Scopus, the Cochrane Central Register of Controlled Trials, and ClinicalTrials...
January 18, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29346020/sequential-ridge-augmentation-sra-protocol-for-hard-and-soft-tissue-grafting-in-alveolar-ridge-deficiencies-a-proposed-algorithm
#8
Neel Bhatavadekar, Amit Srikant Gharpure
The success of implant-based treatment is dependent on the correct restorative position of dental implants in the oral cavity. Often, the final prostheses require dental implants to be placed at sites with inadequate native hard and soft tissue. Bone augmentation procedures and materials have been extensively studied in the literature and various techniques have been developed over time to obtain adequate hard tissue at proposed implant sites. In the recent past, few publications have also studied soft tissue development at planned implant sites...
January 18, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29345719/an-anatomical-variant-evaluation-of-accessory-canals-of-the-canalis-sinuosus-using-cbct
#9
Kaan Orhan, Cansu Gorurgoz, Mesut Akyol, Savaş Ozarslanturk, Hakan Avsever
BACKGROUND: The anatomical variation of the anterior superior alveolar nerve which described as canalis sinuosus(CS) is a less known structure of anterior maxilla. Due to it contains anterior superior alveolar nerve as well as vein and arteries, exact diagnosis will provide surgeons to avoid complications. Hence, the aim of this study was to verify the presence, reveal the frequency and characteristics of accessory canals of canalis sinuosus. MATERIAL AND METHODS: This study was based on retrospective evaluation of CBCT scans...
January 18, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29342864/mechanical-properties-of-a-newly-additive-manufactured-implant-material-based-on-ti-42nb
#10
Christian Schulze, Markus Weinmann, Christoph Schweigel, Olaf Keßler, Rainer Bader
The application of Ti-6Al-4V alloy or commercially pure titanium for additive manufacturing enables the fabrication of complex structural implants and patient-specific implant geometries. However, the difference in Young's modulus of α + β-phase Ti alloys compared to the human bone promotes stress-shielding effects in the implant-bone interphase. The aim of the present study is the mechanical characterization of a new pre-alloyed β-phase Ti-42Nb alloy for application in additive manufacturing. The present investigation focuses on the mechanical properties of SLM-printed Ti-42Nb alloy in tensile and compression tests...
January 13, 2018: Materials
https://www.readbyqxmd.com/read/29342830/methods-to-improve-osseointegration-of-dental-implants-in-low-quality-type-iv-bone-an-overview
#11
REVIEW
Hamdan S Alghamdi
Nowadays, dental implants have become more common treatment for replacing missing teeth and aim to improve chewing efficiency, physical health, and esthetics. The favorable clinical performance of dental implants has been attributed to their firm osseointegration, as introduced by Brånemark in 1965. Although the survival rate of dental implants over a 10-year observation has been reported to be higher than 90% in totally edentulous jaws, the clinical outcome of implant treatment is challenged in compromised (bone) conditions, as are frequently present in elderly people...
January 13, 2018: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/29341976/cone-beam-ct-assessment-of-the-position-of-the-medial-lingual-foramen-for-dental-implant-placement-in-the-anterior-symphysis
#12
Arturo Sanchez-Perez, Paula Boix-Garcia, Pía Lopez-Jornet
OBJECTIVES: To determine the position of the mandibular medial lingual foramen with cone-beam CT (CBCT) 3D imaging modalities when implants are to be placed in the anterior symphysis of the mandible. MATERIALS AND METHODS: A total of 111 CBCTs were considered acceptable and analyzed. The variables measured were as follows: (1) length of the outlet duct; (2) distance from the canal to the buccal cortex; (3) distance from the canal to the inferior cortex; (4) distance from the canal to the lingual cortex; (5) distance from the canal to the alveoli of the nearest tooth in dentate patients and distance from the canal to the marginal crest in edentulous patients; (6) angle of the duct to the horizontal Frankfurt plane; (7) diameter of the exit orifice; and (8) output level of the socket in relation to the teeth and the presence of bifurcations...
January 16, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29340934/impact-force-polar-gap-and-modal-parameters-predict-acetabular-cup-fixation-a-study-on-a-composite-bone
#13
Petr Henyš, Lukáš Čapek
The balanced initial fixation of an implant makes up a crucial condition for its long-term survival. However, the quantification of initial fixation is no easy task and, to date, only qualitative assessments can be made. Although the concept of measuring fixation by means of vibration analysis is already widely used in dental implantology, the rigorous application of this method for the assessment of the fixation of femoral and acetabular components remains a challenge. Moreover, most studies on this subject have tended to focus solely on the femoral stem even though acetabular cup fixation is also important and even more difficult with respect to qualitative measurement...
January 16, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29340355/human-histologic-evidence-of-new-bone-formation-and-osseointegration-between-root-dentin-unplanned-socket-shield-and-dental-implant-case-report
#14
Charles Schwimer, Gregory A Pette, Howard Gluckman, Maurice Salama, Jonathan Du Toit
The socket-shield technique described 7 years ago has since grown in its reporting in the literature as a valid method of ridge preservation at immediate implant placement. To date, large clinical cohorts with up-to-4-year follow-up have been reported. Additionally, evidence of tissue histology at the dental implant and socket-shield has been demonstrated in the animal model. However, human histologic evidence has not yet been available, and the clinician's uncertainty regarding the tissues that may form between the socket-shield and dental implant may remain unanswered until now...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29340354/implant-mandibular-overdentures-retained-by-immediately-loaded-implants-a-1-year-randomized-trial-comparing-patient-based-outcomes-between-mini-dental-implants-and-standard-sized-implants
#15
Kostas Zygogiannis, Irene Ha Aartman, Daniel Wismeijer
PURPOSE: The aim of this 1-year randomized trial was to determine the stability and the magnitude of the effect of converting patients' conventional mandibular dentures to implant overdentures (IODs) on their satisfaction and oral health-related quality of life (OHRQoL). The IODs were retained either with two immediately loaded interconnected standard-diameter implants or with four immediately loaded mini dental implants (MDIs). MATERIALS AND METHODS: Fifty completely edentulous subjects complaining about insufficient retention of their mandibular dentures were randomly assigned to two groups; 25 patients received IODs retained with four MDIs and 25 patients received IODs retained with two standard-sized tissue level (STL) interconnected implants...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29340350/estimating-the-importance-of-significant-risk-factors-for-early-dental-implant-failure-a-monte-carlo-simulation
#16
Oğuz Buhara, Salahi Pehlivan
PURPOSE: The purpose of this study was to develop a probabilistic estimation of the strength of risk factors associated with early dental implant failure and rank them by importance. MATERIALS AND METHODS: A systematic literature search was performed on PubMed, Web of Knowledge, Scopus, Cochrane Central Register of Controlled Trials, and grey literature up to April 2017. A total of 368 records were identified. Following the removal of duplicate and irrelevant records, 56 were screened...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29340349/prevalence-of-dental-implants-and-evaluation-of-peri-implant-bone-levels-in-patients-presenting-to-a-dental-school-a-radiographic-cross-sectional-2-year-study
#17
Eylem Ayhan Alkan, Lian Ping Mau, John Schoolfield, Gary F Guest, David L Cochran
PURPOSE: To evaluate the number of patients with dental implants who present to a dental school clinic for screening and to report the prevalence of peri-implant bone level change detected on digital panoramic radiographs of those subjects. MATERIALS AND METHODS: Patient screening files for 9,422 patients over a 2-year period were examined to see how many patients presented with dental implants. Those patients with at least one implant were further evaluated by measuring the bone level on the mesial and distal sides of the implant using the screening radiograph...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29340348/peri-implant-tissues-and-patient-satisfaction-after-treatment-of-vertically-augmented-atrophic-posterior-mandibles-with-intraoral-onlay-block-bone-grafts-a-retrospective-3-year-case-series-follow-up-study
#18
Amparo Aloy-Prósper, David Peñarrocha-Oltra, Maria Peñarrocha-Diago, Federico Hernández-Alfaro, Miguel Peñarrocha-Diago
PURPOSE: To evaluate the peri-implant soft and hard tissues of dental implants placed in vertically regenerated posterior mandibles with intraoral onlay block bone grafts and patient satisfaction at 3-year follow-up. MATERIALS AND METHODS: A retrospective study of patients with dental implants placed in posterior mandibular sites vertically augmented with intraoral onlay block bone grafts was carried out between 2005 and 2009 at the University of Valencia. The outcomes assessed at the 3-year follow-up visit were the peri-implant soft tissues (Plaque Index and Bleeding Index, probing depth, keratinized mucosa width, and recession), implant survival and success rates, marginal bone loss, and patient satisfaction...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29340346/effects-of-local-drug-and-chemical-compound-delivery-on-bone-regeneration-around-dental-implants-in-animal-models-a-systematic-review-and-meta-analysis
#19
Ali Alenezi, Bruno Chrcanovic, Ann Wennerberg
PURPOSE: One of the suggested methods for enhancing osseointegration is the local application of drug agents around implant surfaces. The aim of this review was to evaluate the methods most commonly used for local drug and chemical compound delivery to implant sites and assess their influence on osseointegration. MATERIALS AND METHODS: An electronic search was undertaken in three databases (PubMed, Scopus, Embase). The search was limited to animal experiments using endosseous implants combined with local drug delivery systems...
January 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29340345/intraosseous-temperature-changes-during-implant-site-preparation-in-vitro-comparison-of-thermocouples-and-infrared-thermography
#20
Sönke Harder, Christopher Egert, Sandra Freitag-Wolf, Christian Mehl, Matthias Kern
PURPOSE: Implant-supported dental prostheses are based on the principle of osseointegration, and the success of dental implantation depends on adequate formation of this intimate bone-to-implant contact. The application of heat during the drilling procedure leads to a rise in intraosseous temperature at the prospective implant site, which may result in various complications. The purpose of the present study was to compare the ability of thermocouples and infrared thermography to detect changes in intraosseous temperature during dental implant site preparation...
January 2018: International Journal of Oral & Maxillofacial Implants
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