Effects of occlusal contact and its area on gravity fluctuation.
Angle Orthod
; 80(3): 540-6, 2010 May.
Article
en En
| MEDLINE
| ID: mdl-20050750
ABSTRACT
OBJECTIVE:
To examine changes in gravity fluctuation caused by experimentally altering the area of occlusal contact. MATERIALS ANDMETHODS:
Subjects consisted of 15 adult Japanese males with normal stomatognathic function, no missing teeth except for the third molars, and equivalent occlusal contact in the anterior and bilateral posterior regions. Silicon biteplates fabricated for each subject to evaluate gravity fluctuation in relation to changes in occlusal contact area were as follows RP(-)-OC(+) (entire occlusal surface covered in centric occlusion); RP(+)-OC(+) (entire occlusal surface covered with bite slightly raised); Ant or Pos/RP(+)-OC(+) (anterior or posterior region selectively covered); and RP(+)-OC(-) (only retromolar pads covered, no occlusal coverage).RESULTS:
No significant differences in gravity fluctuation were noted between subjects wearing biteplates covering the entire occlusal surface. Subjects wearing biteplates with no occlusal contact showed greater gravity fluctuation than those with occlusal contact. In addition, gravity fluctuation for the Ant/RP(+)-OC(+) group (no occlusal contact in the posterior region) was greater than for RP(+)-OC(+) and Pos/RP(+)-OC(+). However, groups with unilateral occlusal contact in the posterior region exhibited large right and left sway amplitude.CONCLUSIONS:
These results suggest that occlusal contact, especially posterior occlusal contact, affects gravity fluctuation, and that appropriate occlusion attained by maintaining even occlusal contact in the posterior region is crucial for gravity fluctuation.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Diente
/
Oclusión Dental
/
Equilibrio Postural
Límite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Angle Orthod
Año:
2010
Tipo del documento:
Article
País de afiliación:
Japón