Longitudinal changes of crown inclination in juveniles with normal occlusion / 中华口腔医学杂志
Chinese Journal of Stomatology
; (12): 467-470, 2007.
Article
in Zh
| WPRIM
| ID: wpr-359721
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the longitudinal changes in crown inclination of permanent incisors and first molars in juveniles with normal occlusion.</p><p><b>METHODS</b>The untreated sample comprised 20 subjects (6 males and 14 females) with normal occlusion from the Research Centre for Craniofacial Growth and Development of Peking University School and Hospital of Stomatology. Crown inclination was evaluated with Biaggini Rayset in two stages, stage I with first molars and four incisors in occlusion (mean, 9.5 +/- 0.9 years) and stage II with the second molars in occlusion (mean, 13.7 +/- 1.3 years).</p><p><b>RESULTS</b>No significant difference was found between sexual groups. The crown inclination of the upper central incisors decreased (P < 0.001). The crown inclination of the lower central and lateral incisors increased (P < 0.01 and P < 0.05, respectively). The crown inclination of maxillary molars decreased with growth (P < 0.001), whereas that of mandibular molars increased with growth (P < 0.001).</p><p><b>CONCLUSIONS</b>Maxillary molars tended to become upright lingually, whereas mandibular molars upright buccally with growth.</p>
Full text:
1
Index:
WPRIM
Main subject:
Physiology
/
Longitudinal Studies
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Dental Occlusion
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Incisor
/
Molar
Type of study:
Observational_studies
Limits:
Child
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Female
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Humans
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Male
Language:
Zh
Journal:
Chinese Journal of Stomatology
Year:
2007
Type:
Article