Implant-supported overdentures with different clinical configurations: Mechanical resistance using a numerical approach (original) (raw)
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The journal of advanced prosthodontics, 2015
This retrospective study evaluated the outcome of implant-retained overdentures (IODs) after 5-19 years of clinical function. A retrospective analysis of patient files was performed referring to 27 patients who received 36 IODs with 3 different bar designs (group A=prefabricated round bars, n=7; group B=one-piece anterior milled bars, n=20; and group C=two bilaterally placed milled bars, n=9) in the mandible (n=24) and/or in the maxilla (n=12). The analysis focused on the survival and success rates (according to Kaplan-Meier) of the implants and prostheses. Technical complication rates for each type of restoration were analyzed and compared via one-way ANOVA and the Chi-squared test. The prevalence of peri-implantitis (radiographic bone loss ≥3.5 mm) was evaluated by digital analysis of panoramic radiographs taken post-operative (baseline) and after 5-19 years of clinical function (follow-up). The mean observational time was 7.3 years. The survival rates of the prostheses and implan...
Implant Treatment of Patients with Edentulous Jaws: A 20-Year Follow-Up
Clinical Implant Dentistry and Related Research, 2008
Background: Implant-supported prostheses are today often used in rehabilitation of partially or totally edentulous patients. Both patients and the dental profession often regard implant treatment as successful in a life perspective. Therefore, studies with a long-term follow-up are important. Purpose: The aim was to investigate the outcome of implant treatment with fixed prostheses in edentulous jaws after 20 years, with special reference to survival rate of implants and prostheses and frequency of peri-implantitis. Materials and Methods: The patient material was a group of patients treated in the early 1980s. The original patient group comprised the first 48 consecutive patients treated with implant-supported prostheses at Umeå University. All patients were edentulous in one or two jaws. The patients had a mean age at the implant insertion of 54.3 years (range 40-74). At the planning of this study 20 years after treatment, 19 of the 48 patients were found to be deceased. Of the 29 patients still alive, 21 patients with altogether 23 implant-supported prostheses could be examined clinically and radiographically. All patients were treated ad modum Brånemark® (Nobel Biocare AB, Göteborg, Sweden) with a two-stage surgical procedure. The implants had a turned surface. Abutment connections were performed 3 to 4 months after fixture insertion in the mandible, and after a minimum of 6 months in the maxilla. The prostheses were fabricated with a framework of gold alloy and acrylic artificial teeth. Results: The 21 patients (with 23 implant prostheses) examined had at the time of treatment got 123 implants (27 in the upper jaw and 96 in the lower jaw) inserted. Only one of these implants had been lost (about 2 years after loading) giving a survival rate of 99.2%. Very small changes occurred in the marginal bone level. Between the 1 and 20-year examinations, the mean bone loss was 0.53 mm and the mean bone level at the final examination was 2.33 mm below the reference point. Conclusions: This follow-up over two decades of implant-supported prostheses demonstrates a very good prognosis for the treatment performed. The frequencies of peri-implantitis, implant failures, or other complications were very small, and the original treatment concept with a two-stage surgery and a turned surface of the implants will obviously give very good results.
Egyptian Dental Journal
Prosthetic rehabilitation of totally edentulous patients today is a common procedure that clinicians approach in their daily practice. The use of dental implants for replacing missing teeth proved to be a safe technique and the implant-prosthetic materials available give the possibility of having long-term clinical success 1,2. Many studies have recommended the mandibular implant overdenture as a reliable treatment modality for edentulous patients and, in particular, those who have persistent problems using conventional
A treatment approach of mandibular implant retained overdenture: A case report
IP innovative publication pvt. ltd, 2019
Edentulism has been a big issue whether it is in old age or in young individuals. The geriatric patients often encounter problems because of the absorbed mandibular ridges. The most common problem faced is the lack of stability and retention of the mandibular denture which ultimately affect the chewing and masticatory efficacy of the patients. Since ages the conventional complete denture is used as a treatment modality for edentulous patients but in last 20 years the implant supported overdenture has emerged as new option for edentulous patients. The use of implant supported overdenture had increased over a time because of good clinical results. The clinical edge of implant supported overdenture over conventional denture is that it can be given in resorbed ridges. The prosthesis shows less movement, better esthetics, improved function and maintenance of vertical dimension of occlusion over time. The higher success is associated with the implant supported overdenture because it meets the patients' expectations, improve quality of life with long term serviceability and positive outcomes.
Dentistry, 2022
The main goal of modern removable prosthodontics is to restore the normal appearance, function, esthetics and speech in each completely edentulous patient. However, if all teeth are missing in a patient, it becomes very complicated to achieve it using traditional protocols. Therefore, implants were introduced into removable prosthodontics to ensure better retention and stability of the conventional dentures. In case of a large amount of bone missing in the jaw it is necessary to ensure the functioning of the dentures constructing various additional stabilizing and retentive prosthodontic solutions on the osseointegrated implants. Numerous types of attachment systems have been used recently for relating implant-retained overdentures to underlying implants: basically splinting (various bar shape designs) and non-splinting attachments (various ball type attachment, magnet attachment, telescopic coping systems). Indications for their use depend on the surgical and prosthodontic factors ...
ABSTRACT Background: Mandibular implant-retained overdentures solve complete denture wearer problems who complain from poor retention and stability. Immediate loading can have several advantages, as it allows the patient to resume normal masticatory function as quickly as possible after surgery. In addition, splinting of implants with two posterior bilateral bars provide more retention and stability. Recently, the use of pre-fabricated bars reduces time and costs for the dentist, dental technician and the patient. Purpose This study aimed to evaluate peri-Implant tissue health evaluation of immediately loaded implants supporting mandibular overdenture retained by bilateral prefabricated bar. Materials and Methods Six completely edentulous males were selected for this study. For each patient, two standardized size; of 13 mm length and 3.6 mm width; screw type implants were surgically inserted in the canine areas and two standardized size of 10 mm length and 3.6 width were inserted in the first molar areas and splinted with two bilateral posterior pre-fabricated bars to retain immediately loaded mandibular overdenture. The tissue health was investigated in the aspects of per-implant probing depth, peri-implant bleeding index, peri-implant plaque index and implant mobility. Results: In all periods of the present study, the probing depth was found to be less than 3 mm, the plaque accumulation increased significantly at the end of the first three months of the present study then decreased during the second three months, the bleeding on probing showed a slight increase at the end of first three months of study then decreased during the second three months of study and all implants exhibited no mobility three months after insertion, but after six months 41.6% of posterior implants exhibited mobility. Conclusion: Within limitations of this study, it can be concluded that: (1) Splinting of immediately loaded implants with bilateral prefabricated posterior bar for retaining mandibular overdenture cannot be considered as a successful prosthetic approach for completely edentulous patient. (2) The implants in the posterior region of the mandible cannot be proposed as a promising abutment for supporting mandibular overdenture retained with bilateral prefabricated bar.