A prospective 10-year follow-up dental cast study of patients with obstructive sleep apnoea/snoring who use a mandibular protruding device

Summary

Objectives

This 10-year prospective study aimed to measure and evaluate the teeth position and occlusion following 10-year nocturnal use of a mandibular protruding device (MPD) in subjects with obstructive sleep apnoea (OSA) or snoring.

Materials and methods

Seventy-seven consecutive patients diagnosed with OSA/snoring were treated with an MPD. Fabrication of dental casts with jaw registration indexes in the intercuspal position was carried out at baseline and at follow-up, a construction bite was made, and an MPD was fitted.At the 10-year follow-up, all subjects (n = 74) were invited to participate. The dental casts were analysed in a series of measurements.

Results

Sixty subjects were included in the follow-up examination—41 were still using the device and 19 had ceased using the MPD.The MPD users showed significant changes in all analysed variables—decrease of overjet (−1.8 mm), overbite (−1.5 mm)—except the mandibular intercanine width and the maxillary anteroposterior relationship. Subjects who had ceased using their MPD retained their initial values, with the exception of a decreased overbite.The MPD users also showed an increased number of subjects with mesio-occlusion and posterior infra-occlusion; those who had ceased using their MPD mostly retained their initial status.

Conclusions

Long-term nocturnal use of an MPD may cause both favourable and unfavourable occlusion changes, such as a decrease of the overjet and overbite or posterior infra-occlusion, and these changes may continue to develop during treatment with an MPD. Subjects with a Class III relationship may not be a suitable group for treatment with an MPD due to the mesial drift of the mandibular teeth.

from ! ORL Sfakianakis via paythelady.61 on Inoreader http://ift.tt/2xLtJVo
via IFTTT