INFLUENCE OF TEETH, ALVEOLI, AND PERIODONTAL LIGAMENTS ON TORSIONAL RIGIDITY IN HUMAN MANDIBLES

被引:28
作者
DAEGLING, DJ [1 ]
RAVOSA, MJ [1 ]
JOHNSON, KR [1 ]
HYLANDER, WL [1 ]
机构
[1] DUKE UNIV,MED CTR,DEPT BIOL ANTHROPOL & ANAT,DURHAM,NC 27710
关键词
BIOMECHANICS; BONE STRAIN; PERIODONTIUM;
D O I
10.1002/ajpa.1330890106
中图分类号
Q98 [人类学];
学科分类号
030303 ;
摘要
We investigated the influence of teeth, periodontal ligaments, and alveoli on the structural integrity of human mandibles loaded in torsion. Surface bone strain was recorded from the mandibular corpus below the first molar on each of four specimens. These specimens were loaded by an external force that caused primarily torsion about the long axis of the corpus, and bone strain was recorded under the following conditions: 1) all supporting structures intact, 2) all supporting structures intact and the M1 loaded by a simulated bite force, 3) M1 removed and 4) alveolar bone of the M1 removed. For comparative purposes, experiments were also designed to investigate the effects of intermittent holes on the torsional rigidity of a baboon femur. This permitted comparison of the mechanical behavior of the mandibles with that of a more homogeneous bony member. These experiments suggest that the presence of teeth within alveoli has a measurable role in the maintenance of torsional rigidity. The condition of the periodontal ligament also appears to influence these stress-bearing capabilities. Moreover, the alveolar bone supporting the teeth also provides structural support for countering torsional loads. For the specific case of corpus twisting, the mandible does not behave as a member with open or closed sections as predicted by theoretical models. The observed magnitudes of bone strain, however, conform more closely to the predictions generated by a closed-section model.
引用
收藏
页码:59 / 72
页数:14
相关论文
共 30 条
[1]   DETERMINATION OF STRESS LEVELS AND PROFILES IN THE PERIODONTAL-LIGAMENT BY MEANS OF AN IMPROVED 3-DIMENSIONAL FINITE-ELEMENT MODEL FOR VARIOUS TYPES OF ORTHODONTIC AND NATURAL FORCE SYSTEMS [J].
ANDERSEN, KL ;
MORTENSEN, HT ;
PEDERSEN, EH ;
MELSEN, B .
JOURNAL OF BIOMEDICAL ENGINEERING, 1991, 13 (04) :293-303
[3]   BIOMECHANICAL SCALING OF MANDIBULAR DIMENSIONS IN NEW-WORLD MONKEYS [J].
BOUVIER, M .
INTERNATIONAL JOURNAL OF PRIMATOLOGY, 1986, 7 (06) :551-567
[4]   BIOMECHANICS OF TORSIONAL FRACTURES - STRESS CONCENTRATION EFFECT OF A DRILL HOLE [J].
BROOKS, DB ;
BURSTEIN, AH ;
FRANKEL, VH .
JOURNAL OF BONE AND JOINT SURGERY-AMERICAN VOLUME, 1970, A 52 (03) :507-&
[5]   BONE STRENGTH - EFFECT OF SCREW HOLES [J].
BURSTEIN, AH ;
VESSELY, JC ;
FRANKEL, VH ;
LUNSETH, P ;
CURREY, J ;
HEIPLE, KG .
JOURNAL OF BONE AND JOINT SURGERY-AMERICAN VOLUME, 1972, 54 (06) :1143-+
[6]  
CURREY J, 1984, MECHANICAL ADAPTATIO
[8]  
DECHOW PC, 1992, BONE BIODYNAMICS ORT, P299
[9]  
Frankel V.H., 1965, BIOMECHANICS RELATED, P381
[10]  
FRANKEL VH, 1970, ORTHOPAEDIC BIOMECHA