Piancino MG, De Biase C, Di Benedetto L, Chaurasia A, Vallelonga T, Tortarolo A. Reverse chewing patterns in patients with bilateral posterior crossbite are related to the occlusal features of the malocclusion.
J Oral Rehabil 2024. [PMID:
39095962 DOI:
10.1111/joor.13822]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 07/13/2024] [Accepted: 07/17/2024] [Indexed: 08/04/2024]
Abstract
BACKGROUND
Bilateral posterior crossbite (BPXB) is a severe malocclusion associated with maxillary hypoplasia. BPXB may involve the same or a different number of teeth between the sides.
OBJECTIVES
To evaluate the masticatory function in BPXB and the association between the masticatory alterations and the occlusal features of BPXB.
METHODS
This observational study included 170 participants: 130 patients with BPXB (65 occlusally symmetric BPXB, i.e. same number and type of posterior teeth in crossbite between the sides, F = 33, M = 32, median age 9.6 (8.2-13) [years.months]; 65 patients occlusally asymmetric BPXB, F = 30, M = 35, median age 9.9 (8.3-13.6)) and 40 controls (F = 25, M = 15, median age 10.2 (9.4-11.6)). The masticatory function was evaluated by the detection of the Reverse Chewing Cycles (RCCs) recorded with a kinesiograph using standardised soft and hard boluses.
RESULTS
The frequency of RCCs was significantly increased in all BPXB patients compared to controls (p < .000). In symmetric BPXB patients, there were no significant differences in the frequency of RCCs during chewing on the left or the right side. In asymmetric BPXB patients, the frequency of RCCs was significantly increased during chewing on the side with relatively more teeth in crossbite (p < .000).
CONCLUSIONS
The masticatory function was significantly altered in all BPXB patients and it was differently affected by symmetric or asymmetric occlusal features of the malocclusion.
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