Comparison of skeletal and dental effects of two different tooth‐tissue–borne types of rapid maxillary expansion appliances: A CBCT retrospective study

摘要

Abstract Objectives To compare the skeletal and dental effects of different types of rapid maxillary expansion (RME) appliances using cone‐beam computed tomography (CBCT). Materials/Methods This multi‐centre study was conducted with a total of 56 patients. The sample consisted of two groups including the McNamara‐Type RME (MNR) group with 30 patients (16 females, 14 males, mean age: 13.38?±?1.16?years) and Full‐Coverage RME (FCR) group with 26 patients (10 females, 16 males, mean age:13.78?±?1.06?years). Twenty‐one parameters were measured on CBCT images including 4 maxillary skeletal, 12 maxillary alveolar, and 5 maxillary dental measurements, and the data were analysed using the SPSS 20.0 software. Results The rates of increase in the palatal maxillary width (PMW) (3), PMW(4), and PMW(6) were significantly higher in the MNR group (P?