PURPOSE The purpose of this study is to evaluate maxillofacial morphology and bite force in patients with severe Duchenne-type myodystrophy. PATIENTS AND METHODS The subjects included 24 men (average age, 21.5 years; range, 17 to 30 years) with Duchenne-type muscular dystrophy receiving treatment in National Ioh Hospital. Lateral and axial cephalograms were used to assess the morphology in th...

In fishes, cleaning is a mutualistic behavior wherein a species will remove and consume ectoparasites from other organisms. More than two-thirds of cleaner fishes display this behavior predominately as juveniles and discontinue cleaning as adults; such species are here referred to as 'facultative cleaners'. Whether allometric changes in morphological traits coincide with ontogenetic shifts away...

Although measuring bite force is an important indicator of the health of the masticatory system, few commercially available transducers have been validated for routine clinical use. T-Scan(®) III Occlusal Analysis System allows to record the bite force distribution, indicating its relative intensity and occlusal timing. Nevertheless, even fewer studies have evaluated the validity and reliabilit...

Alexandre Durval Lemos1 Flávia Riqueto Gambareli2 Marcia Diaz Serra2 Rafael de Liz Pocztaruk3 Maria Beatriz Duarte Gavião2 1Department of Pediatric Dentistry, State University of Paraíba, João Pessoa, PB, BR 2Department of Pediatric Dentistry, Dental School of Piracicaba State University of Campinas (FOP/UNICAMP), Piracicaba, SP, BR 3Department of Prosthetic Dentistry, Dental School of ULBRA-SO...

The bite force of the piranha (Serrasalmidae) has drawn considerable attention due to its ability effectively capture and masticate prey. Herein, we analyze theoretical anterior forces using a lever approach compare them in-vivo maximum forces. We provide mechanics analysis that explains scaling allometry (Foutput) with length fish (l), Foutput?l2.

A 20-month-old child was accidentally poisoned after biting through the bottom of a medicine container and ingesting the tablets inside. Consequently a study was carried out to determine the force required to fracture 20 randomly selected 25 and 32 ml polystyrene containers to see whether this exceeded the bite force of a child's jaw. Tests were performed at displacement rates of 0.5 and 10 cm/...

The Laotian rock rat, Laonastes aenigmamus, is one of the most recently discovered species of rodent, and displays a cranial morphology that is highly specialised. The rostrum of L. aenigmamus is exceptionally elongate and bears a large attachment site for the infraorbital portion of the zygomaticomandibularis muscle (IOZM), which is particularly well-developed in this species. In this study, w...