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  • 1.
    Al-Taai, Nameer
    et al.
    Umeå University, Faculty of Medicine, Department of Odontology.
    Alfatlawi, Fakhri
    Department of Orthodontics, College of Dentistry, University of Baghdad, Baghdad, Iraq.
    Ransjö, Maria
    Department of Orthodontics, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
    Fakhry, Saad
    Department of Endocrinology and Metabolism, College of Medicine, University of Al-Nahrain, Baghdad, Iraq.
    Effect of rapid maxillary expansion on monosymptomatic primary nocturnal enuresis2015In: Angle orthodontist, ISSN 0003-3219, E-ISSN 1945-7103, Vol. 85, no 1, p. 102-108Article in journal (Refereed)
    Abstract [en]

    Objective: To evaluate the effects of rapid maxillary expansion (RME) on nocturnal enuresis (NE) related to the nasal airway, nasal breathing, and plasma osmolality (as an indicator for antidiuretic hormone).

    Materials and Methods: Nineteen patients with monosymptomatic primary NE, aged 6-15 years, were treated with RME for 10-15 days. To exclude a placebo effect of the RME appliance, seven patients were first treated with a passive appliance. Computed tomography of nasal cavity, rhinomanometric, and plasma osmolality measurements were made 2-3 days before and 2-3 months after the RME period. RME effects on NE were followed for three more years.

    Results: Two to three months after the expansion there were significant improvements in the breathing function and a decrease in the plasma osmolality. NE decreased significantly in all patients after the RME period, and all patients showed full dryness after 3 years.

    Conclusions: This study demonstrates that RME causes complete dryness in all patients, with significant effects on pathophysiological mechanisms related to NE.

  • 2.
    Legrell, P E
    et al.
    Umeå University, Faculty of Medicine, Department of Odontology, Oral and Maxillofacial Radiology.
    Nyquist, H
    Umeå University, Faculty of Social Sciences, Department of Statistics.
    Isberg, A
    Umeå University, Faculty of Medicine, Department of Odontology, Oral and Maxillofacial Radiology.
    Validity of identification of gonion and antegonion in frontal cephalograms2000In: Angle orthodontist, ISSN 0003-3219, E-ISSN 1945-7103, Vol. 70, no 2, p. 157-64Article in journal (Refereed)
    Abstract [en]

    This study was designed to develop a method of transferring gonion from lateral to frontal cephalograms, and to use this method as gold standard when evaluating observer performance in identifying gonion in frontal cephalograms. Observer ability to identify antegonion was also evaluated. There was a range of 28 mm in the observers' identification of gonion and a statistically significant deviation from gold standard. The factors "observer" and "cephalogram," regarded as random effects in an ANOVA analysis, and their interaction, each influenced the result, P < .001. The deviation from the mean of all observations for antegonion ranged 8 mm with "cephalogram" having a statistically significant influence. The results suggest that neither gonion nor antegonion can be routinely used as valid landmarks in frontal cephalograms. Gonion can, however, be used if first identified in a lateral cephalogram and transferred to a paired frontal cephalogram aided by radiographic indicators combined with a bilateral scrutiny of projection geometry in different planes through gonion and indicator.

  • 3.
    Marklund, Marie
    et al.
    Umeå University, Faculty of Medicine, Department of Odontology, Ortodontics.
    Legrell, Per Erik
    Umeå University, Faculty of Medicine, Department of Odontology, Oral and Maxillofacial Radiology.
    An orthodontic oral appliance2010In: Angle orthodontist, ISSN 0003-3219, E-ISSN 1945-7103, Vol. 80, no 6, p. 1116-1121Article in journal (Refereed)
    Abstract [en]

    OBJECTIVE: This pilot study was performed to test the hypothesis that an orthodontic oral appliance (OA) that is designed to work against the backwardly directed forces on the upper incisors may counteract the reduction in overjet from these devices.

    MATERIALS AND METHODS: Thirty patients with normal bites, good oral health, and milder sleep apnea were randomized to treatment with either OAs or orthodontic OAs. Bite changes were evaluated on plaster casts and radiographs and by questionnaires after a mean of 2.4 years in 19 frequent users.

    RESULTS: Four of nine patients in the orthodontic OA group increased their overjet by > or =0.4 mm, while none of the 10 patients in the OA group experienced that effect.

    CONCLUSION: Only the orthodontic OA increases the overjet; this design may therefore be beneficial to patients at risk of negative effects on their bite during OA treatment.

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