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Biomedical subjects

K W Higuchi

Publications and source records attributed to K W Higuchi.

9 recordsLinked to original sources
PubMed2000

The zygomaticus fixture: an alternative approach for implant anchorage in the posterior maxilla.

Implant rehabilitation of the edentulous maxilla continues to challenge the ingenuity and clinical skills of the surgeon and restorative dentist. Advanced posterior alveolar resorption combined with increased maxillary sinus pneumatization often leaves insufficient bone for implant anchorage. Even more challenging are conditions such as cleft deformities and maxillectomy defects which present a discontinuous maxilla and complex bony and soft tissue anatomy. Much attention has been paid to combining bone graft procedures either with immediate or delayed implant placement in the management of this type of complex defect anatomy. Various types of bone graft augmentation methods carry significant patient morbidity, require lengthy healing time and are resource demanding. Recently Brånemark introduced an alternative method of securing posterior maxillary implant anchorage using a longer titanium implant placed through the palatal aspect of the second premolar region transantrally into the os zygomaticum (zygoma). This paper describes the indications and clinical applications of the zygomaticus fixture and reviews current outcome data.

Alveolar Ridge Augmentation↗
PubMed1995

Implant survival rates in partially edentulous patients: a 3-year prospective multicenter study.

PURPOSE: This multicenter investigation is an interim 3-year survival report of a 5-year prospective study using Brånemark osseointegrated implants in partially edentulous patients. MATERIALS AND METHODS: Previously defined patient characteristics and clinical parameters were related to implant survival using lifetable analysis. RESULTS: Three years after prosthesis insertion, 460 implants placed in 139 patients remained in the study. Cumulative success rates for maxillary implants (92.5%) were less than for mandibular implants (94.8%), with an overall cumulative success rate of 93.9%. CONCLUSION: Failures were associated with poor bone quality, smaller implant sizes, and a higher plaque index, and were more likely to occur before loading. A 4% incidence of residual long-term inferior alveolar nerve paresthesia was higher than previously reported.

Adolescent↗
PubMed1994

Implant-supported prostheses for treatment of adults with cleft palate.

Six adult patients with cleft palate, ranging in age from 47 to 78 years, were treated with self-tapping titanium implants. Twenty-three implants, 7 to 15 mm in length, were placed. Of these, one (4%) was 7 mm, eight (35%) were 10 mm, nine (39%) were 13 mm, and five (22%) were 15 mm. Time between stage I and stage II implant surgeries was 5 to 14 months, averaging 8.3 months. Time from stage II surgery to the present is 1.5 to 5 years, averaging 3 years. Of the 23 implants placed, 21 (91%) achieved osseointegration. One (4%) implant was not used prosthetically. Two (9%) 10 mm implants failed to integrate in one patient. All patients were treated with a maxillary complete denture or overdenture. Five (83%) required the addition of a pharyngeal section for speech enhancement.

Aged↗
PubMed1993

Current trends in implant reconstruction.

Significant advances have occurred in preprosthetic surgery in the past decade. Patients whose problems range from the loss of a single tooth to extreme conditions involving acquired or congenital defects now have options for reconstruction previously not possible. Optimal care most often requires a team approach with careful planning and execution. Ongoing basic research and strict clinical documentation involving current and future areas of treatment will provide an even greater degree of safety and effectiveness for our patients.

Bone Transplantation↗
PubMed1991

The use of titanium fixtures for intraoral anchorage to facilitate orthodontic tooth movement.

The use of endosseous implants to facilitate orthodontic tooth movement has been periodically reported in the scientific literature for over 40 years. The predictable achievement of rigid bone-implant anchorage was first applied by Brånemark in 1965. Using the osseointegration method, a prospective study was conducted involving seven adult patients who were treated with titanium implants used as rigid anchorage units. Orthodontic forces were directed off the implants to correct a variety of malocclusions. All 14 implants placed remained stable during the course of treatment with loading forces of 150 to 400 g. No significant complications occurred. Desirable occlusal and facial results were achieved in all cases. The results obtained over a 3-year period of treatment indicate that intraoral rigid anchorage in the absence of observed reciprocal action is possible.

Adult↗
PubMed1991

Bone graft reconstruction in conjunction with Branemark fixture placement.

Successful oral rehabilitation utilizing the Branemark osseointegration method of surgery has proven to be an effective routine method of treatment in complete and partial edentulism. In most situations, there is adequate residual alveolar bone to accommodate fixture placement without utilizing bone graft procedure. In some instances involving extreme resorption, traumatic or oncologic defects, cleft deformities or aplasia/hypoplasia congenital conditions, bone graft augmentation is necessary for successful fixture placement.

Adult↗
PubMed1978

Leukemia: the dentist's role in diagnosis.

Patients with leukemia frequently have oral signs and symptoms that may lead to the early diagnosis of this condition. Hematologic laboratory tests that would be of value include a white blood cell count and a platelet count. The dental practitioner should be aware of those diagnostic signs and the possibilities of oral complications associated with the disease. The nature of leukemia and its complications require a regular and thorough oral examination as part of the routine treatment of these patients.

Adult↗