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Biomedical subjects

A Garson

Publications and source records attributed to A Garson.

At least 19 recordsLinked to original sources
PubMed2001

Rugby players' satisfaction with custom-fitted mouthguards made with different materials.

OBJECTIVES: This study compared the comfort of two bimaxillary custom-fitted mouthguards. One type was made with silicone rubber and the other with methyl-methacrylate (acrylic). METHODS: The study was a within-subject crossover clinical trial with 52 high-school rugby players who were randomly allocated to one of two groups. The first group wore a silicone mouthguard for 4 months and an acrylic one for the following 4-month period. The second group wore an acrylic mouthguard followed by a silicone one for similar periods. Comfort, bulkiness, stability, hardness, ability to talk and to breathe, oral dryness, nausea and inclination to chew were evaluated for each period using a Visual Analogue Scale questionnaire. RESULTS: There was no significant difference concerning comfort, bulkiness, ability to talk and to breathe, oral dryness and nausea between silicone and acrylic mouthguards by group and time of examination (Three-way ANOVA P>0.05). Acrylic mouthguards were more stable and harder than silicone ones (Wilcoxon's test P<0.01). Tendency to chew was greater for silicone appliances (P<0.01). For stability, hardness and inclination to chew, there was no significant difference in the response of the players based on the sequence of use of the two types of mouthguard during the survey (Mann-Whitney test P>0.05). At the end of the study, 56% of the players preferred to keep the acrylic mouthguard and 44% chose the silicone one. This choice did not vary between the groups (chi2, P>0.05). CONCLUSION: Silicone rubber mouthguards were well accepted by the players but technical improvements in silicone materials are needed to improve hardness and stability of silicone mouthguards for sport.

Acrylic Resins↗
PubMed1999

Left thoracoscopic sympathectomy and stellate ganglionectomy for treatment of the long QT syndrome.

The long QT syndrome (LQTS) is a rare inherited cardiac disorder that may induce fatal cardiac arrhythmias. Patients diagnosed with this disorder generally have several treatment options, including beta-blockade, cardiac pacing, an implantable automatic defibrillator, or a high thoracic left sympathectomy. We report the case of a 6-year-old girl with the LQTS treated by left thoracoscopic sympathectomy and stellate ganglionectomy. The procedure was performed after an initial thorascopic attempt at another institution failed due to inadequate resection of the sympathetic chain. Operative time was 85 min and blood loss was minimal. There were no intraoperative or postoperative complications. The girl's QT interval decreased and she was discharged on the 4th postoperative day. After 9 months of follow-up, she remains asymptomatic. We conclude that the LQTS patients who fail medical treatment can be treated successfully with left thoracoscopic cervicothoracic sympathectomy. We recommend that the extent of sympathectomy for treating the LQTS be T1-T4 and either the entire stellate ganglion or at least the inferior one-third.

Child↗