incisor growth
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Biomedicines ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 730
Author(s):  
Jonathan Z. Baskin ◽  
Brandon M. White ◽  
Amit Vasanji ◽  
Thomas E. Love ◽  
Steven J. Eppell

Animals with elodont dentition and unfused mandible symphyses are hypothesized to have symmetric incisor morphology. Since these animals maintain their teeth by gnawing, they may provide physiologic feedback on mechanical function when unilateral mandible defects are created that manifest as ipsilateral changes in tooth structure. This defect model would potentially generate important information on the functional/mechanical properties of implants. Rats’ and rabbits’ mandibles and teeth are analyzed with µCT at baseline and post-intervention (n = 8 for each). Baseline incisors were compared. In a unilateral mandible pilot study, defects—ranging from critical size defect to complete ramus osteotomies—were created to assess effect on dentition (rats, n = 7; rabbits, n = 6). Within 90% confidence intervals, animals showed no baseline left/right differences in their incisors. There are apparent dental changes associated with unilateral defect type and location. Thus, at baseline, animals exhibit statistically significant incisor symmetry and there is an apparent relationship between mandible defect and incisor growth. The baseline symmetry proven here sets the stage to study the degree to which hemi-mandible destabilizing procedures result in measurable & reproducible disruption of dental asymmetry. In a validated model, an implant designed to function under load that prevents incisor asymmetry would provide supporting evidence that the implant has clinically useful load-bearing function.


2015 ◽  
Vol 56 (6) ◽  
pp. 377-382 ◽  
Author(s):  
A. L. Meredith ◽  
J. L. Prebble ◽  
D. J. Shaw

1994 ◽  
Vol 27 (5) ◽  
pp. 317-330 ◽  
Author(s):  
Allen L. Salo ◽  
Lawrence E. Shapiro ◽  
Donald A. Dewsbury
Keyword(s):  

1990 ◽  
Vol 35 ◽  
pp. 331-344 ◽  
Author(s):  
Galina A. Klevezal ◽  
Michalina Pucek ◽  
Ludmiła I. Sukhovskaja
Keyword(s):  

1974 ◽  
Vol 53 (3) ◽  
pp. 634-636 ◽  
Author(s):  
Miguel C. Madeira ◽  
Sebastião Hetem ◽  
Mauro A. Rulli

1963 ◽  
Vol 12 (3) ◽  
pp. 238-246 ◽  
Author(s):  
Maurice V. Stack

SUMMARYWeights of mineralized dental tissue have been determined in incisors dissected from ten pairs of twins failing to survive beyond 7-8 months' gestation. Logarithms of weights were compared as ratios (lower/upper) with data from foetuses of similar development. Intra-twin differences were thus shown to be significantly less than inter-twin differences when comparing central incisors. Lateral incisors were too variable to allow this demonstration. The linear regression equation combining logarithms of lower and upper central incisor weights was suitable for estimating foetal age to within one week of the recorded age.


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