Sage Journals: Discover world-class research

Abstract

Objective

To evaluate the characteristics of masticatory muscle activity in operated unilateral cleft lip and palate (UCLP) patients with anterior crossbite compared with normal individuals.

Subjects

Sixteen male and 13 female Chinese patients with UCLP and anterior crossbite. Fifteen male and 13 female Chinese individuals without cleft abnormalities served as a control group.

Design

Electromyographic activity of the masseter muscles and anterior temporalis muscles was recorded bilaterally in different mandibular positions using bipolar surface electrodes.

Results

Compared to noncleft controls, patients with UCLP demonstrated (1) higher activation levels of masseter and temporalis muscles in the rest position, (2) lower potential function of masseter and temporalis, (3) inharmonious activity of the masticatory muscles during mandibular border movement, (4) a higher asymmetry index of the masseter and temporalis muscles, and (5) longer silent periods of the two muscles.

Conclusions

The function of masticatory muscles is different in patients with UCLP with anterior crossbite. Muscle function should be considered when evaluating cleft patients for orthodontic treatment and orthognathic surgery.

Keywords

cleft lip and palate crossbite electromyography masticatory muscle

Get full access to this article

View all access options for this article.

References

Ahlgren

J.G.A.

, Ingervall

B.F.

, Thilamder

B.R.

. Muscle activity in normal and post-normal occlusion. Am J Orthod 1973; 64: 445–456.

Deguchi

, Garetto

L.P.

, Sato

, Potter

R.H.

, Roberts

W.E.

. Statistics of differential Lissajous EMG for normal occlusion and class III malocclusion. Angle Orthod 1995; 65: 151–160.

Deguchi

, Kumai

, Garetto

L.P.

. Statistics of differential Lissajous EMG for normal occlusion and class II malocclusion. Am J Orthod Dentofacial Orthop 1994; 105: 42–48.

Goz

, Schiller

. The influence of lip function on the sagittal and transversal development of the maxilla in cleft patients. Scand J Plast Reconstr Surg 1987; 21: 31–34.

Ingervall

, Carlson

G.E.

. Masticatory muscle activity before and after elimination of balancing side occlusal interference. J Oral Rehabil 1982; 9: 183–192.

Jimenez

I.D.

. Electromyography of masticatory muscles in three jaw registration positions. Am J Orthod Dentofac Orthop 1989; 95: 521–523.

W.R.

, Lin

J.X.

, Fu

M.K.

. The study of mandibular kinesiography in cleft lip and palate patients with crossbite. Chin J Stomatol 1994; 24: 134–136.

Lowe

A.A.

. Correlation between orofacial muscle activity and craniofacial morphology in a sample of control and anterior openbite subjects. Am J Orthod 1980; 78: 89–98.

Macdonald

J.W.C.

, Hannam

A.G.

. Relationship between occlusal contacts and jaw—closing musecle activity during tooth clenching. J Prosthet Dent 1984; 52; 718–729.

10.

Manns

, Chan

, Miralles

. Influence of group function and canine guidance on electromyographic activity of elevator muscles. J Prosthet Dent 1987; 57: 494–501.

11.

Miralles

, Hovia

, Carvajal

. Patterns of electromyographic activity in subject with different skeletal facial types. Angle Orthod 1991; 61: 277–283.

12.

Mongini

, Schmid

, Tempia

. Improvement of masticatory function after orthodontic treatment. Two case reports. Am J Orthod Dentofacial Orthop 1994; 105: 297–303.

13.

Naeije

, Mccarrell

R.S.

, Weijs

W.A.

. Electromyography of the human masticatory muscle during submaximal clenching in intercuspal position. J Oral Rehabil 1988; 15: 295. Abstract

14.

Nagasama

, Yoshida

, Minagi

, Tamura

, Tsuru

. A new objective parameter for the evaluation of masticatory function of edentulous patients. J Oral Rehabil 1988; 15: 295–300.

15.

Nielson

I.L.

, Mcneil

, Danzig

, Goldman

, Levy

, Miller

A.J.

. Adaptation of craniofacial muscles in subjects with craniomandibular disorder. Am J Orthod Dentofac Orthop 1990; 97: 20–34.

16.

Perry

H.T.

, Harris

S.C.

. Role of the neuromuscular system in functional activity of the mandible. J Am Dent Assoc 1954; 48: 665–673.

17.

Riise

S.A.

. The influence of experimental interferent occlusal contacts on the postural activity of the anterior temporal and masseter muscles in young adults. J Oral Rehabil 1982; 9: 419–425.

18.

Santana

, Mora

M.J.

. Electromyographic analysis of the masticatory muscles of patient after complete rehabilitation of occlusion with protection by nonworking side contact. J Oral Rehabil 1995; 22: 57–66.

19.

Schroeder

, Siegmund

, Santibanez

, Kluge

. Causes and signs of temporomandibular joint pain and dysfunction: an electromyographical investigation. J Oral Rehabil 1991; 18: 301–310.

20.

Semb

. A study of facial growth in patients with unilateral cleft lip and palate treated by the Oslo Team. Cleft Palate J 1991; 28: 1–21.

21.

Throckmorton

G.S.

, Finn

R.A.

, Bell

W.H.

. Biomechanics of differences in lower facial height. Am J Orthod 1980; 77: 410–420.

22.

Xie

Q.F.

, Wang

Y.Y.

. An electromyographic study of masticatory muscles silent period and motor-unit potential changes in patients with TMJ disjunction syndrome before and after treatment. Chin J Stomatol 1987; 22: 275–278.

23.

R.S.

, Wang

M.Q.

, Lin

. An electromyographic and mandibular kinesiographic study on crossbite and deep overbite patients. J Pract Stomatol 1990; 6: 42–44.

24.

Yoshida

, Nakamura

, Michi

K.I.

, Wang

G.M.

, Liu

, Qiu

W.L.

. Cephalometric analysis of maxillofacial morphology in unoperated cleft palate patients. Cleft Palate Craniofac J 1992; 29: 419–424.

Electromyographic Investigation of Masticatory Muscles in Unilateral Cleft Lip and Palate Patients with Anterior Crossbite

Abstract

Objective

Subjects

Design

Results

Conclusions

Keywords

Get full access to this article

References