- Email: [email protected]
Masseter muscle thickness and maxillary dental arch width
Reviews and Abstracts 603
American Journal of Orthodontics and Dentofacial Orthopedics Volume 124, Number 5
Masseter muscle thickness and maxillary dental arch width S. Kiliaridis, I. Georgiakaki, and C. Katsaros European Journal of Orthodontics, 2003;25:259-63
Various studies have shown an association between functional capacity of the masticatory muscles and craniofacial morphology. Because there is an association between masticatory muscle size and craniofacial width, a similar association might be expected for dental arch width. The purpose of the investigation was to study the relationship between the ultrasonographic thickness of the masseter muscle and the width of the maxillary dental arch. The sample comprised 60 consecutive orthodontic patients (37 females, 23 males) 7-18 years of age, all of whom had Class I jaw relationships and minor malocclusions. The mean ages were 12.3 years (SD ⫽ 2.6) for the female subjects and 11.5 years (SD ⫽ 2.6) for the male group. The thickness of the masseter muscle was measured ultrasonographically. The readings were performed bilaterally with the muscles in relation and under contraction. Maxillary intermolar width was measured with an electronic caliper as the distance between the palatal surfaces of the first permanent molars. Intermolar width showed no association with age and sex. Masseter muscle thickness showed a direct significant association with these 2 factors; ie, the masseter muscle was thicker in older subjects and in males. In the female group, maxillary intermolar width showed a direct, significant association with masseter thickness during contraction, but age had no statistically significant relationship; ie, females with thicker masseter muscles had a wider maxillary arch. In the male group, no significant relationship was found between maxillary molar width and masseter thickness.
The findings of the study suggest that the functional capacity of the masticatory muscles should be considered a factor that influences the width of the maxillary dental arch. Alex Jacobson 0889-5406/2003/$30.00 ⫹ 0 doi:10.1067/j.ajodo.2003.08.015 Am J Orthod Dentofacial Orthop 2003;124:603 Copyright © 2003 by the American Association of Orthodontists.
ARTICLE ABSTRACT
Stability of LeFort I impaction: titanium versus resorbable fixation W. S. Dhol, D. B. Tompson, C. Clokie, G. Sandor, J. P. Reyneke, M. Caminiti, and J. Daskalogiannakis
A resorbable copolymer (82% poly-L-lactic acid, 18% polyglycolic acid) has been investigated as a potential alternative to titanium for fixation of LeFort I maxillary impaction. No study has examined the skeletal stability of this procedure when resorbable copolymer is used. Fifty consecutive patients underwent maxillary impaction by means of LeFort I osteotomy. Twenty-five patients were treated with titanium fixation, and 25 were treated with resorbable fixation. Lateral cephalograms were obtained 1 week preoperatively, 1 week postoperatively, and after a minimum of 8 months postoperatively. Linear angular measurements were recorded digitally to evaluate 2-dimensional skeletal changes. Statistical analysis showed no significant radiographic differences (P ⬍ .05) in long-term stability within or between the 2 groups. No clinical or radiographic evidence of woundhealing problems was noted. These results support the use of resorbable copolymer fixation as a viable alternative to titanium fixation for LeFort I maxillary impaction.
All inquiries regarding information on reviews and abstracts should be directed to the respective authors. For ordering books, contact your local bookstore or write directly to the publishers. Articles or books for review in this department should be addressed to Dr Alex Jacobson, University of Alabama School of Dentistry, University Station, Birmingham, AL 35295.
American Journal of Orthodontics and Dentofacial Orthopedics Volume 124, Number 5
Masseter muscle thickness and maxillary dental arch width S. Kiliaridis, I. Georgiakaki, and C. Katsaros European Journal of Orthodontics, 2003;25:259-63
Various studies have shown an association between functional capacity of the masticatory muscles and craniofacial morphology. Because there is an association between masticatory muscle size and craniofacial width, a similar association might be expected for dental arch width. The purpose of the investigation was to study the relationship between the ultrasonographic thickness of the masseter muscle and the width of the maxillary dental arch. The sample comprised 60 consecutive orthodontic patients (37 females, 23 males) 7-18 years of age, all of whom had Class I jaw relationships and minor malocclusions. The mean ages were 12.3 years (SD ⫽ 2.6) for the female subjects and 11.5 years (SD ⫽ 2.6) for the male group. The thickness of the masseter muscle was measured ultrasonographically. The readings were performed bilaterally with the muscles in relation and under contraction. Maxillary intermolar width was measured with an electronic caliper as the distance between the palatal surfaces of the first permanent molars. Intermolar width showed no association with age and sex. Masseter muscle thickness showed a direct significant association with these 2 factors; ie, the masseter muscle was thicker in older subjects and in males. In the female group, maxillary intermolar width showed a direct, significant association with masseter thickness during contraction, but age had no statistically significant relationship; ie, females with thicker masseter muscles had a wider maxillary arch. In the male group, no significant relationship was found between maxillary molar width and masseter thickness.
The findings of the study suggest that the functional capacity of the masticatory muscles should be considered a factor that influences the width of the maxillary dental arch. Alex Jacobson 0889-5406/2003/$30.00 ⫹ 0 doi:10.1067/j.ajodo.2003.08.015 Am J Orthod Dentofacial Orthop 2003;124:603 Copyright © 2003 by the American Association of Orthodontists.
ARTICLE ABSTRACT
Stability of LeFort I impaction: titanium versus resorbable fixation W. S. Dhol, D. B. Tompson, C. Clokie, G. Sandor, J. P. Reyneke, M. Caminiti, and J. Daskalogiannakis
A resorbable copolymer (82% poly-L-lactic acid, 18% polyglycolic acid) has been investigated as a potential alternative to titanium for fixation of LeFort I maxillary impaction. No study has examined the skeletal stability of this procedure when resorbable copolymer is used. Fifty consecutive patients underwent maxillary impaction by means of LeFort I osteotomy. Twenty-five patients were treated with titanium fixation, and 25 were treated with resorbable fixation. Lateral cephalograms were obtained 1 week preoperatively, 1 week postoperatively, and after a minimum of 8 months postoperatively. Linear angular measurements were recorded digitally to evaluate 2-dimensional skeletal changes. Statistical analysis showed no significant radiographic differences (P ⬍ .05) in long-term stability within or between the 2 groups. No clinical or radiographic evidence of woundhealing problems was noted. These results support the use of resorbable copolymer fixation as a viable alternative to titanium fixation for LeFort I maxillary impaction.
All inquiries regarding information on reviews and abstracts should be directed to the respective authors. For ordering books, contact your local bookstore or write directly to the publishers. Articles or books for review in this department should be addressed to Dr Alex Jacobson, University of Alabama School of Dentistry, University Station, Birmingham, AL 35295.