Orthophenylphenol and phenylhydroquinone residues in citrus fruit and processed citrus products after postharvest fungicidal treatments with sodium orthophenylphenate in California and Florida.

Sodium orthophenylphenate (SOPP) has been used extensively for >40 years to control postharvest diseases of citrus fruits. Studies of the metabolism of [(14)C]SOPP have identified orthophenylphenol (OPP) as the major metabolite with phenylhydroquinone (PHQ) as a minor metabolite. The whole-fruit tolerance in the United States for OPP is 10 ppm. This study was conducted to quantify terminal OPP and PHQ residues in whole Navel oranges, grapefruit, and lemons following SOPP applications at maximum application rates and following commercial application and fruit storage practices. OPP and PHQ residues also were determined in products processed from treated Navel oranges. OPP residues in lemons, Navel oranges, and grapefruit treated with SOPP using foamer wash and shipping wax applications remained below the 10 ppm tolerance, and PHQ residues were all < or =0.439 ppm. PHQ residues in whole fruit increased with time in commercial storage. OPP residues in all Navel orange matrices except oil remained relatively stable with time in commercial storage; residues in oil declined substantially while in storage.

Prospective comparison of arthroscopy and arthrocentesis for temporomandibular joint disorders.

PURPOSE: A prospective, randomized study was undertaken to compare arthroscopy and arthrocentesis for treatment of temporomandibular joint disorders. PATIENTS AND METHODS: Nineteen patients with clinical and radiographic documentation of internal derangement of the temporomandibular joint(s) unresponsive to nonsurgical therapy were randomized to one of two surgical groups: arthroscopic lysis and lavage under general anesthesia or arthrocentesis, hydraulic distention, and lavage under intravenous sedation. Objective data were collected; including interincisal opening, lateral excursions, occlusal evaluation, deviation on opening, and tenderness to palpation. A questionnaire in the form of visual analog scales relating to pain, joint noise, jaw mobility, and dietary alterations was completed by each patient at 1 week, and 1, 3, 4, 12, and 26 months postoperatively. RESULTS: There was no statistically significant difference in outcome between the two groups for any parameter evaluated. Categorization of a particular subject into a successful outcome was based on statistically significant improvement in maximum incisal opening and pain scores; the overall success rate was 82% for arthroscopy and 75% for arthrocentesis. CONCLUSIONS: Therapeutic success was not significantly different for arthroscopy and arthrocentesis; both surgical modalities are useful for decreasing patient reports of pain while increasing functional mobility of the mandible.