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implant supported overdenture

Lucia Fernandez-Estevan, Javier Montero, Eduardo J Selva Otaolaurruchi, Maria Fernanda Sola Ruiz
PURPOSE: To quantify the rate of maintenance interventions of mandibular prostheses: complete dentures and overdentures retained by two implants, with either internal hex or external hex connections. MATERIALS AND METHODS: This study analyzed patients with edentulous mandibles treated with distinct treatment protocols: a control group received complete dentures; a second group received Locator-retained overdentures supported by two external hex connection implants; and a third group received overdentures supported by internal hex connection implants...
July 2018: International Journal of Oral & Maxillofacial Implants
Toru Kimura, Tsung-Chieh Yang, Yoshinobu Maeda
PURPOSE: To evaluate the bending strain exerted on a maxillary implant overdenture supported by rigid bar and nonrigid double crown connectors in models of high- and low-quality bone. MATERIALS AND METHODS: Four implants were embedded in acrylic resin models of an edentulous maxilla simulating good- and poor-quality bone at the canine and second premolar regions bilaterally. A bar (cross-section dimension: 5 × 5 mm; bilateral distal extension: 10 mm) and double crown connectors with a metal framework (same morphology as the bar) were attached to these implants and placed under a constant 49 N vertical load at the anterior and cantilever regions of both superstructures...
July 2018: International Journal of Oral & Maxillofacial Implants
Emre Tokar, Bulent Uludag
PURPOSE: Implant-retained mandibular overdentures are a proven treatment modality for edentulous patients. Low-profile stud attachments may allow divergence between the abutments up to 40 degrees. The purpose of this study was to investigate load transfer characteristics of various locations and nylon male configurations of low-profile stud attachment-retained overdentures. MATERIALS AND METHODS: Three tapered dental implants were placed into three photoelastic mandibular models...
July 2018: International Journal of Oral & Maxillofacial Implants
Xin Zhang, Wei Liu, Hai Qing, Xibo Pei, Junyu Chen, Jian Wang
OBJECTIVE: Many studies have investigated the effect of implant number on the performance of implant-supported overdentures (ISO), but few have focused on denture movement. This in-vitro study aims to investigate the influence of implant number on the movement of mandibular ISO under biting force. METHOD AND MATERIALS: An edentulous mandibular cast and 12 overdentures (n = 12) were fabricated, and a locator attachment system with blue nylon inserts was chosen for this study...
July 9, 2018: Quintessence International
H Mather, M Thomason, J Ellis
As the UK witnesses a decline in the number of edentulous adults, there is a simultaneous reduction in the number of cases available to undergraduate dental students for the teaching of complete dentures. When edentulous adults are unable to function with conventional complete dentures, particularly pertaining to the mandibular denture, an implant-supported mandibular overdenture has been evidenced as the gold standard for edentulous patients. The evidence in favour of mandibular implant-supported overdentures is one of the most robust evidence bases for any clinical treatment and similarly it has been shown that undergraduate students are equally as capable in the provision of implant-supported overdentures as experienced prosthodontists...
July 6, 2018: British Dental Journal
Mariana L C Valente, Marcos V W Shimano, José A M Agnelli, Andréa C Dos Reis
STATEMENT OF PROBLEM: The gradual loss of retention and the need for periodic replacement of attachment-system components are the most frequent complications in implant-supported overdentures. PURPOSE: The purpose of this in vitro study was to develop a new attachment system for overdentures with polymeric materials and compare its retention and deformation with a conventional O-ring attachment system. MATERIAL AND METHODS: A matrix with 2 mini-implants with ball abutments was used to simulate the mandibular border during a fatigue resistance test...
June 29, 2018: Journal of Prosthetic Dentistry
Sebastian Hahnel, Christos Alamanos, Sibylle Schneider-Feyrer, Matthias Stöckle, Martin Rosentritt
PURPOSE: To investigate the mechanical properties and wear of nylon inserts and abutments in Locator-retained, implant-supported overdentures (L-IODs). MATERIALS AND METHODS: Clinical wear of inserts and abutments was qualitatively rated in a group of 16 patients with L-IODs. The inserts were also subjected to microscopic analysis, differential scanning calorimetry (DSC), and thermal gravimetric analysis (TGA). RESULTS: Wear was identified in almost all inserts and abutments...
July 2018: International Journal of Prosthodontics
Moustafa Abdou ELsyad, Tarek Ahmed Soliman, Ahmed Khalifa Khalifa
PURPOSE: This study aimed to evaluate and compare the retention and stability of rigid telescopic and milled bar attachments for implant-supported maxillary overdentures. MATERIALS AND METHODS: An acrylic resin model of the edentulous maxilla without alveolar undercuts was fabricated, and four implants were inserted in the canine and second premolar areas of the model. Two experimental overdentures were constructed and connected to the model with either rigid telescopic (RTA) or milled bar (MBA) attachments...
June 12, 2018: International Journal of Oral & Maxillofacial Implants
Daniel R Reissmann, Norbert Enkling, Rim Moazzin, Marius Haueter, Andreas Worni, Martin Schimmel
OBJECTIVES: The aim of this study was to assess long-term changes in oral health-related quality of life (OHRQoL) over a period of 5 years in patients treated with narrow diameter implants (NDI) in the mandible for support of an overdenture. METHODS: In this prospective clinical study, a consecutive sample of 20 edentulous patients who had worn sufficient complete dentures for at least 12 weeks was provided with four immediately loaded one-piece titanium NDIs in the mandible...
May 28, 2018: Journal of Dentistry
Suraj Suvarna, Ravishek K Singh, Renu B Pachar, Sachin Kundra, Sankalp Arya, Lata K Mehta
BACKGROUND AND AIM: Selection of suitable length of dental implants is very subjective and largely depends on clinical evidences and operator's expertise. The present study was aimed to assess the role of cone beam computed tomography (CBCT) and cephalograms as far as the selection of right implant length is concerned. MATERIALS AND METHODS: The study includes 220 patients for whom radiographic and follow-up records were obtained. There were 105 males and 115 females in the age range of 22 to 58 years...
May 1, 2018: Journal of Contemporary Dental Practice
E Rissa, T Kurki, J Laine, T Närhi
Implant-supported overdenture is a well-established treatment option for many patients who have functional problems with conventional dentures. It may be primary choice for patients with altered jaw anatomy, neuromuscular disorders, pronounced gag reflex, severe residual ridge resorption and oral tissue defects. In this article we describe a case report, where tongue cancer patients occlusion was rehabilitated with an implantretained overdenture. In 2001 patient was operated for squamous cell carcinoma on the left side of the tongue...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
Silvia Brandt, Jan Brandt, Ali-Reza Ketabi, Hans-Christoph Lauer, Anna Kunzmann
OBJECTIVES: Implant-supported overdentures are an established dental treatment mode. The aim of this prospective study was and interindividual comparison of patient satisfaction with restorations retained by a prefabricated and thus inexpensive attachment system (Locator®) or with a technologically complex and thus expensive attachment system (ceramic/electroplated double crowns) with similar retentive performance. MATERIALS AND METHODS: Twelve patients received a Locator and a double-crown prosthesis in a crossover study for test periods of 3 months each...
May 19, 2018: Clinical Oral Investigations
Vahed Parzham, Roy B Judge, Denise Bailey
PURPOSE: To describe the restorative treatment profiles of long-span (> three units), implant-supported dental prostheses (LIDPs) prescribed in 27 private practices in the state of Victoria, Australia, during the period from January 1, 2005, to December 31, 2009. The restorative treatment profiles of these prostheses refer to the framework/veneering materials, number of prosthetic units/supporting implants, location in the oral cavity, retention methods, and cantilever designs. LIDPs refer to implant-supported prostheses of fixed or removable design; namely, fixed partial dentures (IFPDs), fixed complete dentures (IFCDs), removable partial dentures (IRPDs), and complete overdentures (IODs)...
May 2018: International Journal of Prosthodontics
Wen-Jun She, Jia-Jing He, Yun-Jia Liu, Ting Jiao
PURPOSE: To investigate the effect of ball attachments with different materials on retention of mandibular implant supported overdenture. METHODS: The experimental groups were divided into group A (titanium ball / titanium cap group) and group B (titanium ball / golden cap group), each group had 3 samples. A standard mandibular edentulous model was made, and the implants (4.8*10 RN SP) were embedded in the bilateral canine region. Mandibular complete dentures were made routinely and the attachments were attached...
December 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
R Ali, A Al-Khayatt, C Barclay
Surgical resection of an oral tumour (and the associated free flap reconstruction) can significantly alter the oral anatomy. The lack of sulcus depth, alveolar ridge, presence of a mobile flap and limited tongue movement can make it impossible for patients to control a removable prosthesis. To help this cohort of patients, dental implants can be invaluable. The Oral Rehabilitation Team at Central Manchester University Dental Hospital have used dental implants to rehabilitate oral cancer patients for over thirty years...
April 27, 2018: British Dental Journal
Gregor-Georg Zafiropoulos, Andreas Parashis, Taha Abdullah, Evangelos Sotiropoulos, Gordon John
Dental implant success requires placement after periodontal therapy, with adequate bone volume, plaque control, primary stability, control of risk factors, and use of well-designed prostheses. This report describes the surgical and prosthetic management of a patient with severe iatrogenic periodontal/periimplant bone destruction. Methods. A 55-year-old female smoker with fixed partial dentures (FPDs) supported on teeth and implants presented with oral pain, swelling, bleeding, and a 10-year history of multiple implant placements and implants/prosthesis failures/replacements...
2018: Case Reports in Dentistry
Edvard Janev, Nadica Janeva, Marija Peeva-Petreska, Kristina Mitic
BACKGROUND: After tooth loss, however, severely atrophic residual alveolar ridges are fairly common, especially in patients who have been edentulous for a long period. Anterior area of the mandible is areas where clinicians have greater anatomical limitations. Reduced alveolar bone height very often represents a contraindication to implant therapy, unless a procedure such as a ridge augmentation is performed. CASE REPORT: This study aims to present two separate cases in highly selected edentulous anterior mandibular sites, where one stage, mini implants were used to support total prostheses...
March 15, 2018: Open Access Macedonian Journal of Medical Sciences
Maarten Glibert, Stijn Vervaeke, Wolfgang Jacquet, Kim Vermeersch, Pär-Olov Östman, Hugo De Bruyn
BACKGROUND: It is claimed that bone remodeling is limited when the implant neck has microthreads and an internal abutment connection. However, comparative studies, excluding confounding factors, are scarce. AIM: This RCT aims to assess whether a coronal microthreaded design and an internal abutment connection affects crestal bone loss, up to one year of function. MATERIALS AND METHODS: Twenty-one maxillary edentulous patients were consecutively treated for a bar supported maxillary overdenture on four different implants with respectively: internal connection and microthreads on the implant neck (I MT); internal connection, no microthreads (I NMT), external connection, with microthreads (E MT), and external connection, without microthreads (E NMT)...
March 25, 2018: Clinical Implant Dentistry and related Research
Fathima Banu Raza, Anand Kumar Vaidyanathan, Padmanabhan T Veeravalli, Subhiksha Ravishankar, Aashique S Ali
BACKGROUND: Single piece implant in fixed prosthesis is widely been evaluated, however, long term evaluation of crestal bone loss and the wear of O-ring in single piece ball attachment implant supported overdenture is yet to be evaluated PURPOSE: The present article evaluates the crestal bone loss around single piece ball attachment implants placed bilaterally in the canine region and the wear of O-ring in implant supported overdenture over a period of three years. MATERIALS AND METHODS: Twelve completely edentulous patients between the age group of 55-65 years were selected...
June 2018: Clinical Implant Dentistry and related Research
Andreas Worni, Stefan Paul Hicklin, Regina Mericske-Stern, Norbert Enkling
OBJECTIVE: The aim of the present prospective clinical study was to assess the survival rate and the radiologic crestal bone level alteration around four interforaminal immediately loaded narrow-diameter implants (NDIs) in the edentulous mandible. METHOD AND MATERIALS: A total of 20 participants received each 4 NDIs (MDI, 3M Espe; diameter 1.8 mm, length 13 or 15 mm) in the edentulous mandible. Immediate loading was performed if insertion torque was 35 Ncm or higher...
2018: Quintessence International
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