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Results for “Maxillofacial Prosthesis”

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At least 829 records · Page 46Linked to original sources
PubMed1992

A retrospective study of osseointegrated skin-penetrating titanium fixtures used for retaining facial prostheses.

This investigation was conducted to evaluate osseointegrated skin-penetrating facial titanium implants used for anchoring facial prostheses over a 5-year period and to recommend guidelines for the use of osseointegrated implants in the restorative treatment of auricular and orbital defects. The total success rate for implant survival was 95.6% in the auricular defects and 67.2% in the orbital defects. Approximately 10% of the patients will have some skin problems, whereas the remaining 90% will have no or minimal problems. The possibility of achieving osseointegration around an orbital defect is not as good as in the mastoid process. Success criteria for the use of implants in the craniofacial region are given.

Adolescent↗
PubMed1992

[Bone substitutes and infection in maxillofacial surgery].

Bony substitutes are in fashion in maxillofacial surgery. They are used to fill bony cavities, in bony reconstruction to give shape-lines and re-create area of support or to fill bony defects. Then their use is frequently crowned by success in general surgery, it is not the same thing in maxillofacial surgery because of the usual impossibility to fulfil a requirement to biomaterial utilisation: the watertight. Furthermore, they don't have yet, for the most part, an essential quality: malleability. In our experience, their use are frequently disappointing because of postoperative infections and we stay faithful to the autograft bone. However it is highly probable that these biomaterials will take an importance more and more considerable when these problems will be overcame.

Biocompatible Materials↗
PubMed2003

[The analysis of masticatory efficiency after maxillofacial prosthetic treatment for unilateral maxillary defect].

OBJECTIVE: To evaluate the clinic results of maxillofacial prosthetic treatment for unilateral maxillary defect. METHODS: Masticatory efficiency was tested before and after maxillofacial prosthetic treatment for unilateral maxillary defect. RESULTS: There was significant difference between one week, one month, three months after treatment and before treatment(F = 0.635, P = 0.002). Masticatory efficiency was increased by 59.98% after one month. CONCLUSION: Maxillofacial prosthetic treatment can significantly increase the masticatory efficiency of unilateral maxillary defect. It remains stable one month later.

Adult↗
PubMed2005

[Correction of a vast craniofacial defect -- a case report].

A case of a patient with a vast craniofacial defect after shooting is reported. The case is of interest because of a large size of the defect. The technique is described how to rehabilitate the patient with reconstruction the face contour and calvarium by silicone implants.

Facial Injuries↗
PubMed2005

[Position and orientation of zygomatic-area implant of zygo-buccal flange osseointegrated implant obturator].

OBJECTIVE: To provide objective data for position and orientation of zygomatic-area implant used in zygo-buccal flange osseointegrated implant obturator for patients with large maxillary defect. METHODS: Fifty cases of normal unilateral zygomatic body with dentition were measured on three-dimensional spiral CT images. Measurements included the slope angle of zygomatic body on sagittal sectional image, the maximal horizontal distance from the buccal boundary of maxillary alveolar to outboard of maxillary sinus. Furthermore, the configuration of zygomatic body was observed on coronal sectional image. RESULTS: The average rearward slope angle of zygomatic-body was 80.03 degrees. Forty-eight cases showed straight zygomatic-body configurations and two cases quite curvy. The maximal horizontal distance from the buccal boundary of maxillary alveolar to outboard of maxillary sinus was 6.77 mm. CONCLUSIONS: In a normal condition, implants can be upright inserted tilting about 10 degrees ahead to utilize much zygomatic bone-volume in high site. In order to improve security and validity of implantation, it is better to take spiral CT examination to evaluate the bone volume and shape of zygomatic body before zygomatic-area implant.

Adolescent↗
PubMedDate not supplied

The relationship between elastomer opacity, colorimeter beam size, and measured colorimetric response.

The effect of opacity on the colorimetric responses of large-area and small-area colorimeters was determined using an elastomer intended for maxillofacial prosthetics use and containing various pigments at different concentrations. Opacity was determined by calculating the contrast ratio of 2-mm-thick specimens against black and white backings, using Kubelka-Munk analyses to correct for thickness and backing color variations. The measure of comparison of the two colorimeters was the relative difference in tristimulus reflectance, with the tristimulus reflectance of the large-area colorimeter as the basis of the relative difference. A significant quadratic relationship was found between contrast ratio and the relative difference in tristimulus reflectance. This relationship may be used to describe opacity without the need to make optical observations or measurements of a thin layer of material on contrasting backings. The small-area colorimeter produced color parameters that are a measure of the combined effects of both color and opacity. The importance of beam size considerations of optical measuring devices for translucent natural and prosthetic materials was emphasized.

Color↗
PubMed2006

The clinical application of a new synthetic bone grafting material in oral and maxillofacial surgery.

A novel bone formation material based on hydroxyapatite-xerogel is presented. With the use of the innovative sol-gel technology this material is produced in the low-temperature range by the addition of silicon dioxide; in its structure it mimics to a great extent the natural bone matrix. This results in high osteoconductivity and an osteoprotective effect as well as in complete biodegradation corresponding to bone formation in the course of natural bone remodelling. Two case reports are presented.

Adult↗
PubMed1991

[Esser (1877-1946) and the dawn of maxillofacial prosthetics in The Netherlands].

A short historical review is presented of the development from simple facial plates towards complex maxillofacial prostheses. There was an impetuous demand for extended development of this type of prostheses during World War I. The Dutch plastic surgeon Esser developed the skin-graft-inlay technique facilitating in a relative easy way extensive maxillofacial reconstructions. The technique was published in English and German and was soon used by surgeons on both sides. The combined training of Esser in medicine and dentistry was advantageous for the development of the technique.

History, 19th Century↗