Anterior displacement of the mandible in adult rhesus monkeys

Hiniker, J. J.; Ramfjord, Sigurd P.

doi:10.1016/0022-3913(66)90054-0

Cited by 63 publications

(11 citation statements)

References 4 publications

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“…Most experiments have been performed on various species of macaques and rodents, and the majority indicate that a specific remodeling response can be seen in the condylar structure when occlusal functioning is actively altered. Great differences exist between the results, however, regarding possible changes in condylar growth rate after changed occlusal function (Hiniker and Ramfjord, 1966;Charlier et al, 1969;McNamara and Carlson, 1979).…”

Section: Introductionmentioning

confidence: 68%

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Increased Condylar Growth after Experimental Relocation of the Glenoid Fossa

1993

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Attempts to increase mandibular growth by the stimulation of condylar proliferative activity, either experimentally or with functional appliances in humans, have led to controversial results. The aim of this study was to measure changes in proliferative activity in the mandibular condyle after steady experimental posterior relocation of the glenoid fossa in the rabbit without actively interfering with normal masticatory action. The method differed from most previous experimental procedures, which force the mandible anteriorly to stimulate functional appliance therapy. Twelve 5-day-old rabbits underwent gluing of the interparietal, temporoparietal, and lambdoidal sutures. Three experimental and three control rabbits were injected with tritiated thymidine at 10, 15, 20, and 30 days and were killed after 2 h for histological and autoradiographic examination. The total number of labeled cells in the prechondroblastic layer was higher in the experimental group, the difference being greatest in the 20-day-old rabbits. The highest proliferative activity in the experimental group was found in the area immediately posterior to the articular contact surface. There was a tendency for the cartilage layers to be thicker in the experimental group, especially in the extreme anterior segments of the condyle.

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Section: Introductionmentioning

confidence: 68%

“…Secondary cartilage may respond quite differently to small and large pressures, as shown by Copray et al (1985), and this may explain the controversy concerning earlier experimental results on possible growth increase after anterior movement of the mandible (Hiniker and Ramfjord. 1966;Charlier et al, 1969;McNamara and Carlson, 1979).…”

Section: Discussionmentioning

confidence: 90%

Increased Condylar Growth after Experimental Relocation of the Glenoid Fossa

1993

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“…Experimental studies involving alteration of occlusal relationships in subadult nonhuman primates (McNamara, 1972;Stockli and Willert, 1971; Joho, 1973) have also indicated the joint (particularly the condyle) to be responsive to induced differences in oral function. However, the absence of similar adaptive changes in the joints of adult animals (Hiniker and Ramfjord, 1966; Ramfjord and Enlow, 1971) has led to the suggestion (McNamara, 1972) that this alterability of joint tissues may be confined to growing animals. In the lower joint component, this view is consistent with a n increasing awareness of the condyle as a site of compensatory or adaptive growth whose cartilage is transformed by early adulthood into a mature form that has apparently lost the capability for further growth (McNamara, 1972;Durkin et al, 1973).…”

Section: Discussionmentioning

confidence: 99%

Changes in articular eminence morphology with dental function

Hinton

1981

American J Phys Anthropol

114

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Measurements of mandibular fossa depth and slope of the articular eminence were obtained for human skeletal samples chosen to represent a wide spectrum of subsistence strategies and oral function: hunter-gatherers (Eskimos, Australians), American Indians dependent to a variable extent on maize agriculture, and early twentieth century American whites and blacks. In the Eskimo and Australian samples, a generalized and steady increase in fossa depth and slope was observed with increasing functional age (tooth wear) through wear level 5 (of 8), followed by a levelling off or slight decrease in fossa depth in later wear levels on the anterior teeth and sharp decrease in fossa depth in later wear levels on the molars. Although much less consistent due in part to extensive and early molar loss, patterns of variation in the remaining samples were characterized overall by a decrease in fossa depth and slope with increasing wear, especially on the molars. Further, in those samples with high incidences of posterior tooth loss, fossa depth was routinely less and the eminence more gently sloped in subsamples having experienced molar loss than in subsamples retaining all their molars. These data provide evidence that the temporomandibular joint (TMJ) undergoes continuous morphological alteration throughout adult life, and that these alterations are probably mediated by dental function. Moreover, they suggest that differences in patterning of such alterations may exist among human groups with contrasting patterns of tooth use.

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“…The first experimental model that we will discuss is not new and has been used by many investigators since its introduction by Carl Breitner (Breitner, 1930;Haupl and Psansky, 1939;Derichsweiler, 1958;Baume and Derichsweiler, 1961;Hiniker and Ramfjord, 1966;Joho, 1968;Stockli and Willert, 1971), also in our laboratory for the last 11 years (Elgoyhen et al, 1972;McNamara, , 1973aMcNamara, , 1976McNamara and Carlson, 1979).…”

Section: Studies Of Functional Protrusionmentioning

confidence: 99%

Functional determinants of craniofacial size and shape

McNamara

1980

The European Journal of Orthodontics

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Anterior displacement of the mandible in adult rhesus monkeys

Cited by 63 publications

References 4 publications

Increased Condylar Growth after Experimental Relocation of the Glenoid Fossa

Increased Condylar Growth after Experimental Relocation of the Glenoid Fossa

Changes in articular eminence morphology with dental function

Functional determinants of craniofacial size and shape

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