| Abstract: | Purpose] The aim of this study was to determine the inter-rater and intra-rater
reliability of the mandibular range of motion (ROM) considering the neutral craniocervical
position when performing the measurements. Subjects and Methods] The sample consisted of
50 asymptomatic subjects. Two raters measured four mandibular ROMs (maximal mouth opening
(MMO), laterals, and protrusion) using the craniomandibular scale. Subjects alternated
between raters, receiving two complete trials per day, two days apart. Intra- and
inter-rater reliability was determined using intra-class correlation coefficients (ICCs).
Bland-Altman analysis was used to assess reliability, bias, and variability. Finally, the
standard error of measurement (SEM) and minimal detectable change (MDC) were analyzed to
measure responsiveness. Results] Reliability was good for MMO (inter-rater, ICC=
0.95−0.96; intra-rater, ICC= 0.95−0.96) and for protrusion (inter-rater, ICC= 0.92−0.94;
intra-rater, ICC= 0.93−0.96). Reliability was moderate for lateral excursions. The MMO and
protrusion SEM ranged from 0.74 to 0.82 mm and from 0.29 to 0.49 mm, while the MDCs ranged
from 1.73 to 1.91 mm and from 0.69 to 0.14 mm respectively. The analysis showed no random
or systematic error, suggesting that effect learning did not affect reliability.
Conclusion] A standardized protocol for assessment of mandibular ROM in a neutral
craniocervical position obtained good inter- and intra-rater reliability for MMO and
protrusion and moderate inter- and intra-rater reliability for lateral excursions.Key words: Reliability, Range of motion, Temporomandibular joint |
