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At least 1,063 records · Page 59Linked to original sources
PubMed1992

Loads and designs of screw joints for single crowns supported by osseointegrated implants.

The problem of screw stability was approached in this study by calculating the maximum occlusal forces in vivo for patients with single implant restorations (which use only one screw to secure the prosthetic reconstruction to the implant). The measurements of occlusal forces together with geometric parameters for the individual patients were used to determine the necessary holding capabilities of the screw joint. Different screw designs were tried in bench test situations and the results were compared with clinical situations. A gold alloy screw with a flat head and high tightening torque (35 Ncm) produced the best results.

Bite Force↗
PubMedDate not supplied

Immediate occlusal loading of Osseotite implants in the completely edentulous mandible.

PURPOSE: This article reports the preliminary data from a clinical study of immediately loaded, full-arch, screw-retained prosthesis with distal extensions (hybrid prosthesis) supported by Osseotite implants placed in the edentulous mandible. MATERIALS AND METHODS: Fifteen patients who received 103 implants were enrolled in this study. The first 2 patients received both immediately loaded and submerged implants, while the remaining patients had all implants immediately loaded. The first 9 patients received a temporary prosthesis within 4 hours of surgery, and the hybrid prosthesis, made of a titanium framework and acrylic resin teeth, was placed after 6 months. The last 6 patients received the same type of hybrid prosthesis within 36 hours of surgery. Marginal bone loss was monitored via periapical radiographs by a computerized technique. RESULTS: One failure (out of the 92 immediately loaded implants) occurred after 3 weeks of function because of infection. A cumulative success rate of 98.9% was achieved for up to 48 months of follow-up, while the prosthetic cumulative success rate for the same period was 100%. Marginal bone loss at the immediately loaded implants was within the generally accepted conventional limits for standard delayed loading protocols. DISCUSSION: This technique can reduce treatment time but should be applied with caution. CONCLUSION: The preliminary results of this study suggest that rehabilitation of the edentulous mandible by an immediately loaded hybrid prosthesis supported by 5 to 6 implants may represent a viable alternative treatment to the classical delayed loading protocols.

Acrylic Resins↗
PubMedDate not supplied

Prosthodontic complications in a prospective clinical trial of single-stage implants at 36 months.

PURPOSE: The present material reports on prosthodontic complications in a trial of 51 patients with prostheses supported by single-stage implants over a period of 36 months. MATERIALS AND METHODS: One hundred eighty-six single-stage implants were placed in 51 patients over a 3-year period in 2 carefully controlled prospective clinical trials. Nineteen of the patients (103 implants) were completely edentulous and restored with a maxillary complete denture and a mandibular fixed-detachable complete prosthesis. Single metal-ceramic crowns or fixed partial dentures were fabricated for the remaining 32 patients (83 implants). The fixed restorations were either screw-retained or cemented. RESULTS: All patients/implants were followed for a minimum of 3 years. Complications in the edentulous patients included fracture of denture teeth, fracture of the maxillary denture, and occlusal screw loosening. Occlusal screw loosening and loss of the resin composite access plug were the only complications observed in the patients treated with screw-retained restorations. No complications were found in the patients restored with cemented restorations on solid abutments. DISCUSSION: Problems with prostheses were very common in the completely edentulous patients (13 of 19 patients encountered complications), possibly a result of increased bite force or inadequate laboratory technique. Tooth fractures were seen more frequently in men than in women. Complications occurred in only 5 of the 32 partially edentulous patients. CONCLUSION: Complications were associated with laboratory-related procedures rather than the implant system itself.

Adult↗
PubMedDate not supplied

Pattern of permanent tooth loss in Nigerian children and their prosthetic replacement.

The pattern of permanent tooth loss and prosthetic replacement in 76 children were studied. Dental caries and its sequelae were the most frequent cause of tooth loss (64.47%) followed by trauma (21.05%). Molars accounted for 64.20% of tooth type lost due to dental caries and its sequelae while loss of incisors (19.75%) was due to trauma. It was observed that only incisors were replaced (81.25%) due to their conspicuous position in the mouth whereas a large number of molars were lost and none was replaced. The need to periodically assess children after tooth loss for prosthetic replacement was emphasised.

Adolescent↗
PubMed2003

Replacement of missing teeth with fiber-reinforced composite FPDs: clinical protocol.

The concept of minimally invasive preparation protocols has resulted in reduced loss of critical tooth structures and maintenance of optimal strength, form, and aesthetics. While various treatment options have been described for single-tooth replacement, fiber-reinforced composite (FRC) fixed partial dentures (FPDs) provide a viable treatment alternative with proven mechanical properties, aesthetics, and function. This article presents several clinical scenarios in which minimally invasive adhesive FRC FPDs are provided to deliver enhanced predictability, strength, and durability.

Aged↗
PubMed1992

Achieving ideal esthetics in osseointegrated prostheses. Part II. The single unit.

There are several advantages to the CeraOne single-tooth abutment. It seats directly onto the fixture, forming a nonrotating joint. A new type of gold alloy screw that can be tightened to 32 N/cm is used. In addition, the restoration is constructed on a prefabricated ceramic cap onto which porcelain is directly baked. A case report illustrates the technique and the highly esthetic results of such single-tooth replacement.

Adolescent↗
PubMed1992

IMZ implants placed into extraction sockets in association with membrane therapy (Gengiflex) and porous hydroxyapatite: a case report.

A buccal plate destroyed by the inflammatory process as a result of a longitudinal root fracture was completely restored by the combined use of an IMZ implant placed in the alveolus of the fractured maxillary central incisor and the principles of guided tissue regeneration. A Gengiflex membrane was used to cover the implant, and porous hydroxyapatite was used as grafting material. At the 6-month reentry, the defect around the implant was completely filled by mineralized tissue.

Adult↗
PubMedDate not supplied

Replacing a failed resin-bonded fixed partial denture with a single tooth implant.

When adequate width and height of remaining alveolar bone is present, the implant-supported fixed prosthesis is an excellent alternative in replacing a missing tooth. The prosthetic tooth, supported by an endosseous implant, emerges from the tissue in a manner which resembles the natural tooth it replaces better than any other treatment option available. This article presents one clinical case history, preclinical treatment phase, and actual clinical treatment.

Adolescent↗
PubMed1992

Achieving anterior aesthetics with an anti-rotational abutment.

Single-tooth implants of various minerals and metals have been used, with some success, since ancient times. However, single-tooth implant survival was unpredictable until Branemark and his co-workers developed the theory and technique for obtaining a predictable direct bone to implant interface, which has been termed "osseointegration." Retrospective studies suggest excellent survival of single-tooth implants that predictably achieve this direct bone to implant interface. Case reports of single-tooth implants in the anterior and posterior areas of the jaws suggest the efficacy of this treatment, although scientific prospective studies evaluating the safety and efficacy of this treatment have only recently begun.

Dental Abutments↗