Jack W. Martin

Hollow obturator with removable lid

Hollowing the obturator reduces the weight of the prosthesis. Closed and open hollow obturator prosthesis each have their particular benefits. However, the obturator with a removable lid has its benefits also, and the advantages have been described.

Physical therapy techniques in the treatment of the head and neck patient

Limited jaw openings, which may develop following surgery and radiation therapy is a significant clinical problem. Some patients develop restricted oral opening because of extensive fibrosis and scarring of the affected tissues. The aid of the physical therapist is invaluable in the treatment of these patients.

Cranial implant modification

This technique combines the heat-cured resin system with an autopolymerizing resin system (Cranioplast). Cranioplast has been used since the early 1950s. Clinical trials have shown that it evoked the least severe inflammatory response when compared with other autopolymerizing methyl methacrylate systems. The advantage inherent in this technique is the ability to go to the operating room with a prefabricated heat-cured acrylic resin prosthesis and alter the implant with Cranioplast for excellent adaptation to the defect. The technique provides a well-fitting cranial implant prosthesis with good cosmetic results.

Framework retention for maxillary obturator prostheses

Abstract An in vitro study was done to evaluate the relative effectiveness of clasp placement in specific obturator framework designs. Three commonly encountered defects were studied. These included (1) the antero-hemimaxillectomy, in which the only remaining dental support is from canine to second molar on one side; (2) the hemimaxillectomy, in which the defect extends the length of the midpalate to the mesial surface of the central incisor; and (3) the partial or posterior maxillectomy, in which all six anterior teeth remain along with all posterior teeth on the nondefect side. Three frameworks that demonstrated the following design characteristics were made for each cast: (1) full lingual plate with buccal retentive arms, (2) lingual retention with buccal reciprocation, and (3) buccal and lingual retention.

Cast circumferential and wire clasps for obturator retention

The indications and rationale for using cast circumferential and wire clasps for obtaining retention of obturator prostheses have been presented and discussed. Only the test of time can prove the effectiveness of an obturator design. The infinite variability of physical and patient factors demands understanding and application of basic fundamentals and, in the final analysis, good clinical judgment. Clasping is only one part of the obturator, and it must fit harmoniously into the overall design of the prosthesis. How the clasp contributes to support and bracing as well as retention must always be considered.

The labial plate major connector in the partial mandibulectomy patient

The indications, design, and advantages of the labial plate major connector as compared with the labial and lingual bar major connector are reviewed. The mechanical principles of increased rigidity and strength are discussed. The article suggests that the labial plate major connector may have an advantage over the labial bar major connector and should be considered when a labial connector is indicated.

A flasking technique for microwave processing of silicone prostheses

Polyvinylchloride plumbing parts provide a readily available source of material to use in making facial prostheses. Inexpensive pipe fittings (end cap attachments and closet flanges) can be combined to provide a durable container for stone molds that can be tightened in a strong curing press. The entire unit can be cured in a microwave oven in 30 minutes.