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At least 973 records · Page 54Linked to original sources
PubMed2001

Case report: impression and maxillo-mandibular relationship recording for construction of obturator prostheses.

The present case report describes a procedure for obtaining the master impression and the maxillo-mandibular relationship for the definitive prosthesis in a maxillectomy patient. After casting the metal framework, a visible-light-cured tray resin was spread over the resin retention grid and gradually cured. Modelling compound was extended over the resin with functional movements, and finally the margins of the defect were sealed with a dental impression wax. A column of light-cured resin was constructed from the lower face of the resin/compound/wax structure to the opposing dental arch. This column permitted recording of the maxillo-mandibular relationship.

Acrylic Resins↗
PubMed1996

Multiple implants for first molar prosthodontics.

Problems that can occur when single implants are utilized to restore first molar teeth include the frequent loosening of screws, as well as screws and/or implant breakage. These may result from torquing and rotational movements of the prosthesis during masticatory and parafunctional mandibular movements. When sufficient bone and mesio-distal restorative space is present, the placement of two implants should be considered.

Dental Abutments↗
PubMed2000

Distal extension mandibular removable partial denture connected to an anterior fixed implant-supported prosthesis: a clinical report.

This clinical report demonstrates the possibility of achieving positive results with a removable prosthesis connected to an implant-supported fixed prosthesis. Bone quality and quantity at the implant sites are essential requirements for the success of the treatment. The support of the RPD and its connection with the fixed prosthesis creates stability during chewing activity and allows a functional activity similar to that involving an overdenture. The adoption of an occlusal scheme with subocclusion of the fixed prosthesis contacts compared with those of the removable prosthesis, together with the stress-director system of the RPD can be effective factors that decrease the risk of loss of implant integration. Further long-term follow-up studies with a larger patient population are needed to confirm the clinical and biomechanical validity of the prosthetic solution described in this clinical report.

Aged↗
PubMed1992

Mandibular guidance prostheses following resection procedures: three case reports.

Unilateral loss of mandibular continuity creates problems in prosthetic reconstruction. For dentate patients, palatal guide ramps or mandibular guide flange prostheses are indicated. Edentulous patients are much more difficult to retrain in mandibular movements, but complete dentures designed with stabilising occlusal contacts can be successful in compensating for the deviation. Three case reports are presented.

Centric Relation↗
PubMedDate not supplied

Histopathologic observation of seven removed endosseous dental implants.

Seven failed endosseous dental implants that were removed from humans were examined histologically. Results suggest that the hollow-basket portion or the vent should be located as far from the gingiva as possible, and that an adequate healing period is needed for implant placement following tooth extraction. In addition, findings also suggest that the hollow-basket implant is not suitable for a healing socket, that periodic inspection is necessary for two-stage implants to evaluate adaptation of the embedded junction between the abutment and implant in the gingiva, and that there is risk of coating separation from hydroxyapatite-coated implants and possibilities of coating resorption.

Adult↗
PubMed2005

New hope for Treacher-Collins syndrome: a surgical case report.

The objective of this case report is to discuss the possibility of developing a surgical treatment paradigm for patients with some of the noted characteristics of Treacher-Collins syndrome, mainly mandibular ankylosis and/or retrognathia (mandibular retrusion), in a way that would provide lasting, predictable results and minimize the frequently seen mandibular ankylosis. Through various medical imaging techniques, mainly computed tomography (CT) scan, the radiology imaging technologist produces accurate CT scan images of the particular patient's osseous cranial structures. These images can then be used by the stereolithography (SLA) technician to construct accurate SLA models. The SLA models can then be used by the surgical and implant design team to not only prescribe the surgical correction necessary, but also design and construct the actual temporomandibular joint (TMJ) and mandibular implants, as well as perform mock surgery, which will be needed to restore function and esthetics for the patient. The early results from this alloplastic reconstructive surgery have provided the anticipated results of relieving the ankylosis, improving jaw function and frequently dental occlusion, as well as improving the esthetics. Without this breakthrough surgical development, many of these Treacher-Collins syndrome patients will not be able to enjoy normal breathing, mastication, jaw function, esthetics, oral and dental health, and the emotional relief these corrections allow. Many patients who suffer the disfiguring and functionally damaging affects of Treacher-Collins syndrome never receive the surgical correction necessary. Many have had autogenous reconstruction of missing mandibular and TMJ structures, only to sometimes relapse into a more disfiguring and lasting condition. By simply placing a Christensen Fossa-Eminence Prosthesis(r) (TMJ Implants, Inc., Golden CO, USA) between the cranial base and any bone graft, one is more likely to achieve satisfactory TMJ mobility. If a condylar or mandibular reconstruction is necessary, the Christensen Total TMJ Prostheses(r) (TMJ Implants, Inc., Golden CO, USA) are available and provide excellent results.

Adult↗
PubMed2000

Dental implantation for restoration of posttraumatic deformities: avulsion injuries.

Soft and hard tissue defects of the cranio- and maxillofacial area, especially after an avulsion injury, are challenging to reconstruct. Sophisticated soft and hard tissue transfer techniques have allowed satisfactory reconstruction of the gross anatomic structure. However, these methods do not allow optimal restoration of fine anatomic detail or function. The advent of dental implants and modified dental implants for craniofacial applications has allowed maximization of cosmetic and functional restoration. Prosthodontists are capable of fabricating subunits of the cranio- and maxillofacial area with fine detail, reproducing the coloring, texture, and idiosyncrasies of a patient's native skin. Dental implant technology has allowed these prostheses to be bone anchored, yielding a reproducible and stable attachment. This method of attachment in turn allows flexibility in the design of the prosthesis, to maximize restoration, and imparts an increased sense of confidence to the patient. Illustrated are six examples demonstrating the versatility of dental implants in the reconstruction of avulsion injuries of the cranio- and maxillofacial complex.

Alveolar Process↗
PubMed2005

[A case report of treatment for complex dysfunction of occlusion and mastication due to a maxillary fracture].

PATIENT: A case report of a 39-year-old man complaining of complex dysfunction of occlusion and mastication is presented. The patient came to Iwate Medical University Hospital following urgent hospitalization and treatment at a local hospital after catching his head in a forklift. The patient consulted the Second Prosthetic Department with the purpose of occlusal examination in April, 1994 and he was diagnosed with a malunited maxillary fracture. Afterwards, surgical correction was performed, but complex dysfunction of occlusion and mastication remained. Fixed prosthesis treatment was then planned and a dental prosthesis was set in April, 2000. His prognosis has since remained favorable. DISCUSSION: At the commencement of treatment, both surgery and orthodontic treatment were considered, but the patient desired early social rehabilitation. Therefore, a dental prosthesis was used to restore facial asymmetry and mandibular function. CONCLUSIONS: Rehabilitation of occlusal function was achieved by using a dental prosthesis. This facilitated early social rehabilitation and helped improve the patient's quality of life. Since there have been few reports of cases in which a dental prosthesis was used to correct occlusal disharmony after surgical correction due to maxillary fracture, long-term follow-up will be needed for this patient in order to increase knowledge about treatment strategies for such cases.

Adult↗
PubMed1979

The relationship of canine-protected occlusion to a periodontal index.

A clinical evaluation was made on 1,000 teeth in 100 patients with Angle's Class I occlusion who were free from histories of orthodontics, removable or fixed prosthesis, occlusal equilibration, maxillary or mandibular jaw fractures, and systemic diseases. The study was made to determine if there was a relation between their patterns of disclusion and a periodontal disease index. In this study, 14% of the subjects exhibited canine protection, 16% a pattern called progressive disclusion, 46% group function, and 24% a different disclusion pattern on each side. The teeth of mouths having canine-protected occlusions had significantly lower mean periodontal disease index scores than the teeth of mouths having progressive disclusion or group function. Also, the canines and the molars in the canine-protected group exhibited lower mean periodontal disease index scores than their counterparts in the progressive disclusion or group function categories.

Adolescent↗
PubMed1990

Fixed mandibular complete denture prostheses supported by mandibular staple bone plate implant.

The staple bone plate implant has been used to stabilize and retain an mandibular overdenture. This implant-with-pin configuration, with four pins penetrating the bone and mucosa, was used to support a mandibular fixed complete denture. The prosthesis was completely implant supported. All of the occlusal loads were directed to the bone through the implant pins. Results for six patients were reported. The implant and the prosthesis were well tolerated.

Adult↗
PubMedDate not supplied

Maxillary changes under complete dentures opposing mandibular implant-supported fixed prostheses.

PURPOSE: The aim of this study was to determine whether a condition similar to Combination Syndrome occurs in patients rehabilitated with a maxillary complete denture opposing a mandibular implant-supported fixed prosthesis. MATERIALS AND METHODS: Standardized clinical procedures measured fit, occlusal integrity, and bone loss in the anterior maxilla in 11 edentulous subjects meeting these requirements, from the patient pool of the Implant Centre, United Dental Hospital, Sydney. RESULTS: A mean annual loss of 0.17 mm in the anterior maxillary ridge height was not statistically significant (P > 0.05). However, increased pressure in the anterior maxillary ridge during occlusion and loss of posterior occlusal contacts in retruded position were noted on one or both sides in all subjects. CONCLUSION: Loss of posterior occlusion could not be related to anterior maxillary bone loss. However, to maintain the integrity of the prostheses and their supporting structures, it is important to schedule periodic recall appointments for review of the occlusion.

Aged↗
PubMed1993

[The Brånemark implant in the lower jaw. Experiences of edentate patients with a complete implant-supported bridge].

The Brånemark system for implant supported bridges has been carried out in Amsterdam since 1982. One hundred patients with a maxillary conventional full denture and a mandibular fixed tissue-integrated prosthesis were selected for this study. Before and long after the treatment, questionnaires were sent to these patients in order to gain information of their experiences. The treatment had greatly benefitted the patients, in spite of the problem of the loose lower denture in some cases was shifted to the upper jaw.

Adult↗
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

Rescue procedure for the Brånemark Novum protocol.

The Brånemark Novum protocol for immediate functional loading of a mandibular fixed implant-supported prosthesis has been an effective alternative for selected patients. In the event of the loss of an implant, a rescue set that allows continuous use of the original fixed restoration while restoring tripod osseointegrated support at the implant level is available.

Dental Implantation, Endosseous↗