Dysthyroid and myasthenic myopathy of the medial rectus: a clinical pathologic report.

A patient with simultaneous involvement of the right medial rectus by dysthyroid and myasthenic myopathy is presented. These abnormalities were confirmed by a positive Tensilon test, computerized tomography demonstrating an enlarged right medial rectus, and a right medial rectus muscle biopsy demonstrating histopathology typical of both diseases.

Medial rectus injury from intranasal surgery.

Severe medial rectus injury occurred in two cases following intranasal sinus surgery. In the first case a scarred medial rectus muscle was found at the time of corrective surgery. Reexamination of the surgical specimen in the second case confirmed our finding of medial rectus transection. Both patients had good cosmetic and functional improvement by means of vertical recti transposition to correct their large angle, fixed exotropias. A review of the literature indicates that this is, to our knowledge, a previously unreported complication of intranasal sinus surgery.

Microsurgical removal of a primary intraorbital meningioma.

A 48-year-old woman with a primary intraorbital meningioma associated with the optic nerve sheath underwent a microsurgical removal of the tumor through a lateral orbitotomy. Visual recovery was essentially complete.

Resolution of classic migraine after removal of an occipital lobe AVM.

A patient had a thirteen-year history of symptoms clinically indistinguishable from classic migraine: a slowly progressive visual fortification spectrum lasting 40 minutes, followed by a five- to six-hour throbbing unilateral headache with nausea and vomiting. After unsuccessful migraine therapy, investigation revealed a large occipital lobe arteriovenous malformation (AVM). Surgical removal of the AVM resulted in immediate and total resolution of all symptoms.

Investigation of the effect of three sprue designs on the porosity and the completeness of titanium cast removable partial denture frameworks.

STATEMENT OF PROBLEM: Although titanium has been used to cast removable partial denture frameworks, the casting process is arduous and requires specialized equipment. PURPOSE: This study evaluated the ability of 3 sprue designs (tree, ball, and circular) to produce complete, void-free castings of removable partial denture frameworks made from commercially pure titanium. METHODS AND MATERIAL: A cast with a Kennedy class III, modification 1, partially edentulous arch was used. The blocked-out cast was modified to facilitate assessment of the completeness of the casting of the clasp arms. Thirty refractory casts were made, and 10 wax patterns for each sprue design were fabricated and invested with ethyl silicate investment. Castings were made with an arc-type automatic casting machine in an argon atmosphere. Castings were examined with radiographic equipment to detect the presence of voids in the castings, and the completeness to each casting was visually verified. Data on porosities were tabulated and statistically analyzed with 1-way ANOVA followed by Student Newman-Keuls test. Chi-square analysis was used to identify statistically significant differences in casting defects among the 3 sprue designs. RESULTS: No statistically significant differences in the total number of porosities were found between the 3 sprue designs (P =.51). Results of completeness of castings evaluated by using chi-square test revealed a statistically significant deference among the 3 sprue designs (P =.008). CONCLUSION: The ball-sprue design produced the most complete castings for the removable partial denture titanium frameworks.