The effects of maxillomandibular fixation on ventilatory functions in adult Nigerians

Does Maxillomandibular Fixation Affect Respiratory Function? A Systematic Review

“…As for the FVC parameter, there was a reduction in all 5 studies at the time of MMF, which was only statistically significant in 4 studies, namely: Famurewa, 1 Doshi, Amuwha, 2 and Akhiwu. 11 Similarly to the FVC, the FEV1 parameter was reduced in the 5 studies in patients with the MMF, with a statistically significant decrease only in the studies conducted by Famurewa, 1 Williams, 6 Amuwha, 2 and Akhiwu. 11 The FEV1/FVC ratio, measure as a percentage, is used to determine if the respiratory pattern is obstructive, restrictive, or normal.…”

“…11 Similarly to the FVC, the FEV1 parameter was reduced in the 5 studies in patients with the MMF, with a statistically significant decrease only in the studies conducted by Famurewa, 1 Williams, 6 Amuwha, 2 and Akhiwu. 11 The FEV1/FVC ratio, measure as a percentage, is used to determine if the respiratory pattern is obstructive, restrictive, or normal. In healthy adults, normality would be approximately 75% to 80%.…”

“…Accordingly, 5 studies including clinical trials 1,11 and prospective studies 2,4,6 made up this systematic review with a total sample of 283 patients aged between 18 and 70, of both sexes.…”

“…The studies evaluated the parameters measured via spirometry, with the patient in MMF and again after removal. Three studies 1,2,11 performed MMF on patients with mandibular fractures who kept the MMF in place for 6 weeks, where the spirometry was conducted in immediate post-op, 7 days after MMF, when the MMF was removed (6 weeks later) and 7 days after removal of the MMF. Two studies 4,6 performed a simulation of MMF in which the patient was kept in maximum intercuspation during spirometry and, at the same moment, spirometry was carried out with the mouth open.…”

“…Regarding FEV1/FVC, this saw a reduction in parameters in all age ranges, evidencing that the respiratory pattern was found to be impaired in all age groups. 4 Peak expiratory flow (PEFR) was evaluated in 3 studies, 1,6,11 in which the outcome was a reduction in values at the insertion of the MMF. In the studies conducted by Akhiwu 11 and Famurewa, 1 there was a statistically significant reduction in PEFR in the first 48 hours after MMF.…”