Pierre Robin sequence and obstructive sleep apnea

The case of a 12-year-old female patient with Pierre Robin sequence is reported, in which reduction of the pharyngeal airway leads to obstructive sleep apnea syndrome (OSAS) and excessive daytime sleepiness. Radiological evaluation, computerized tomography and magnetic resonance image showed bilateral temporomandibular ankylosis. Cephalometric data evidenced marked reduction of the posterior airway space. Three all-night polysomnographic evaluations detected severe OSAS with decrease in oxygen saturation. The Multiple Sleep Latency Test (MSLT) perfomed on two separate days objectively quantified the excessive daytime sleepiness with short sleep latencies; stage REM was not present. Polysomnography, MSLT and thorough radiologic studies, in this case, made it possible to determine the severity of OSAS, the site of obstruction, and the associated malformations

Obstructive sleep apnea treatment with dental appliance

The case of a 40-year-old male patient with obstructive sleep apnea syndrome (OSAS) is reported, with emphasis on treatment with a dental appliance. This therapeutic approach, which has been focused on recent research, has as its objective, the posturing of the mandibule and, consequently, the tongue more anteriorly, thus in turn leading to an increase in the posterior oropharyngeal airway space (PAS). Cephalometry contributed determining in this case whereby enlargement limits were observed in the PAS with mandibular displacement. Clinical and polysomnographic controls showed subjective reduction of the excessive daytime sleepiness and objective decrease in apneas intensity to normal limits. Eight months follow-up evidenced the steady improvement

Fracture load of complete-arch implant-supported prostheses reinforced with nylon-silica mesh: An in vitro study

Made available in DSpace on 2019-09-12T16:57:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2018Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Statement of problem. Complete-arch implant-supported prostheses without a framework have a high risk of failure: a straightforward and inexpensive reinforcement material, such as nylon mesh, could improve their longevity. Purpose. The purpose of this in vitro study was to evaluate a nylon-silica mesh compound on the fracture strength of acrylic resin and the fracture load of complete-arch implant-supported prostheses. Material and methods. Twenty-four complete mandibular arch implant-supported prostheses were divided into 2 groups according to cantilever length (molar and premolar) and subdivided into another 2 subgroups according to the presence or absence of reinforcing mesh. The specimens were submitted to a maximum load-to-fracture test in a universal testing machine, with a 100-N load cell, a 2 mm/min crosshead speed, and a spherical metal tip diameter of 4 mm at different points (molar and premolar). These were submitted to 1-way analysis of variance for repeated measurement and the post hoc Tukey multiple comparison test (alpha=.05). Results. The mean maximum load standard deviation for the molar group was 393.4 +/- 95.0 N with reinforcement and 305.4 +/- 76.3 N without reinforcement (P=.02); and for the premolar group was 1083.3 +/- 283.7 N with reinforcement and 605.3 +/- 90.5 N without reinforcement (P=.001). Conclusions. Reinforcement with nylon mesh increased the mean maximum load of implant supported complete-arch prostheses at both cantilever lengths. The cantilever to the premolar (5 mm) presented the highest maximum load values to fracture.[Papaiz Goncalves, Fernanda de Cassia] Inst Aeronaut Technol ITA, Postdoctoral Program, Sao Jose Dos Campos, Brazil[Amaral, Marina] Universidade de Taubaté (Unitau) , Dept Dent, Dent Prostheses[Souto Borges, Alexandre Luiz; de Arruda Paes-Junior, Tarcisio Jose] Sao Paulo State Univ, UNESP, Inst Sci & Technol, Dept Dent Mat & Prosthodont, Ave Engenheiro Francisco Jose Longo 777, BR-12245000 Sao Jose Dos Campos, Brazil[Martins Goncalves, Luiz Fernando] Inst Aeronaut Technol ITA, Applicat Lab, Engn, Sao Jose Dos Campos, Brazi