Effect of Breast Cancer Treatment on the Stomatognathic System.

Danilo Stefani Esposto,Paulo Batista De Vasconcelos,Ligia Maria Napolitano Gonçalves,Marcelo Palinkas,Simone Cecilio Hallak Regalo,Selma Siéssere,Vânia Tie Koga Ferreira,Elaine Caldeira De Oliveira Guirro

doi:10.1590/0103-6440201801791

Danilo Stefani Esposto, Paulo Batista De Vasconcelos + Show 6 more

Open Access

https://doi.org/10.1590/0103-6440201801791

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Abstract

Breast cancer is the most common cancer affecting women in the world and provides functional changes in the human body. Evaluate women submitted to unilateral mastectomy, through electromyographic activity (mandibular rest, right and left laterality, protrusion, maximum voluntary contraction with and without Parafilm, habitual and non-habitual mastication) and thickness (rest and maximum voluntary contraction) of the right temporal muscle (RT), left temporal (LT), right masseter (RM) and left masseter (LM), also the molar bite force (right and left) and compare the data with healthy women. Material and Methods: 32 women were divided into two groups: unilateral mastectomy group (MG), average ± standard deviation 56.50±14.50 years (n=16) and without the disease group (CG), average ± standard deviation 56.56±14.15 years (n=16). The normalized electromyographic data, muscle thickness and maximal molar bite force were tabulated and submitted to statistical analysis (SPSS 21.0; student t test, p≤0.05). Significant statistical differences between MG and CG were found in right laterality, for RM (p=0.02); left laterality, for LT (p=0.01); chewing with peanuts, for RM (p=0.04); chewing with raisins, for LM (p=0.04) and right molar bite force (p=0.03). There was no statistically significant difference between MG and CG for muscle thickness. The results of this study suggest that women undergoing unilateral mastectomy may present functional changes, with emphasis on muscular hyperactivity, lower masticatory efficiency and lower maxillary bite force.

Highlights

Breast cancer is a global public health problem with the highest survival rates, around 80%, among all cancers, when diagnosed early [1]
Physical limitations are reported as a result of breast cancer treatment [5], as well as oral physiology alterations [6] and psychological changes, especially when it is related to anxiety and self-esteem [7]
With the evolution of the surgical techniques and the increasing incidence of malignant neoplasm in the breast, is necessary to verify the postoperative functional alterations resulting from the current procedures [8], because many mastectomized women present changes in the body posture, asymmetries in the trunk, limited range of motion on upper limbs and muscle disorders [9,10]

Summary

Introduction

Breast cancer is a global public health problem with the highest survival rates, around 80%, among all cancers, when diagnosed early [1]. Because the disease is still diagnosed in advanced stages, despite being considered a type of cancer with positive prognosis. Physical limitations are reported as a result of breast cancer treatment [5], as well as oral physiology alterations [6] and psychological changes, especially when it is related to anxiety and self-esteem [7]. With the evolution of the surgical techniques and the increasing incidence of malignant neoplasm in the breast, is necessary to verify the postoperative functional alterations resulting from the current procedures [8], because many mastectomized women present changes in the body posture, asymmetries in the trunk, limited range of motion on upper limbs and muscle disorders [9,10]

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Conclusion