A material of 30 patients with metallic implants was used in a longitudinal study, based on lateral headplates, of the mandibular rotational pattern. The complexity of the rotational phenomenon in the mandibular rotation has necessitated the proposal of some operational definitions: morphogenetic and positional rotations of the mandible. A relationship has been established between the variation of the gonial angle and the variation of both morphogenetic and positional rotations of the mandible. A relationship has been established between the variation of the condylar growth direction and the variation of both morphogenetc and positional rotations of the mandible: this relationship is the strongest when the morphogenetic rotation of the corpus is considered.

Dental Implantation↗

PubMed1977

Direction and intensity of mandibular rotation in the sagittal adjustment during growth of the jaws.

A material of 22 patients with metallic implants in both jaws has been used to study, longitudinally on lateral headplates, the relationship between the degree of mandibular rotation, the difference in amount of growth of both jaws, represented by the value (E), and the sagittal intermaxillary relationship (G). It has been established that the variation of sagittal intermaxillary relationship and the variation of the degree of mandibular rotation are two phenomena presenting a "balance mechanism" when related to the value (E). The different combinations of these three variables during mandibular growth are proposed, represented in diagrams. This study reveals that several possible mandibular responses correspond to a single given initial condition.

Dental Implantation↗

PubMed1977

Maxillary rotation during human growth: annual variation and correlations with mandibular rotation. A metal implant study.

For a longitudinal study of the maxillary rotation, based on lateral headplates, a material of 22 patients with metallic implants in both jaws has been used. It has been established that the degree of maxillary rotation shows variations in direction and in intensity each year. It is smaller, in absolute value, than the degree of mandibular rotation. Due to the fact the direction of the maxillary and mandibular rotations are not always the same, it appears that the interaction between the maxillary and mandibular rotations plays an important role in the vertical and sagittal relationships of both jaws.

Adolescent↗

PubMed1977

The maxillary rotation: Its relation to the cranial base and the mandibular corpus. An implant study.

A material of 22 patients with metallic implants was used in a longitudinal study, based on lateral head-plates, of the relationship between: 1) the maxillary rotation and the cranial base 2) the maxillary rotation and the different mandibular rotations. No connection has been found between the variation of the maxillary rotation and the growth of the cranial base. The correlation between the maxillary and the mandibular rotations is the highest when the rotation of the corpus is considered. A strong correlation is found between the variation of the condylar growth direction and the variation of the maxillary rotation.

Adolescent↗

PubMed1977