Significance of Tests for Biting Strength

O'Rourke, John

doi:10.14219/jada.archive.1949.0192

Cited by 32 publications

(8 citation statements)

References 4 publications

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“…In view of this difference, the similarity in chewing efficiency of both groups wearing implant-retained overdentures was unexpected. In several studies on masticatory performance and bite force, the sensitivity of the mucoperiosteum covering the edentulous mandibular ridge has been hypothesized as a factor limiting these oral functions (O'Rourke, 1949;Wennstrom, 1971;Kapur and Garrett, 1984;Hardtmann et al, 1989;Slagter et al, 1993b). The results of the present study suggest that the retention and stability of the mandibular denture, rather than the degree of support by implants or mucosa, determine an individual's ability to comminute foods during mastication.…”

mentioning

confidence: 99%

Comminution of Food with Mandibular Implant-retained Overdentures

et al. 1994

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When complete-denture wearers are treated with from four to six implants and mandibular implant-borne prostheses, masticatory performance improves. No significant improvement has been observed with two implants and implant-mucosa-borne overdentures, suggesting that the masticatory performance of edentulous subjects depends on the degree of support for their mandibular prostheses by implants or alveolar mucosa. To verify this hypothesis, we studied, in a randomized clinical trial, the comminution of an artificial test food during mastication. The trial involved the provision of a new maxillary denture and either a new conventional mandibular denture, a mandibular overdenture retained by two permucosal cylindric implants through a single bar-clip attachment, or a mandibular overdenture retained by a transmandibular implant through five clips on a triple-bar construction with cantilever extensions. In comparison with the subjects wearing mandibular implant-retained overdentures, the subjects with conventional complete dentures needed between 1.5 and 3.6 times more chewing strokes to achieve an equivalent reduction in particle size. No differences in masticatory performance and efficiency were found between the subjects who had received two permucosal cylindric implants and those who had received a transmandibular implant. The results suggest that the increased retention and stability of the mandibular denture, rather than the degree of support by implants or alveolar mucosa, determine the wearer's ability to comminute food during mastication.

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confidence: 99%

Comminution of Food with Mandibular Implant-retained Overdentures

et al. 1994

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“…Forces in the occlusal phase of mastication of dentate persons are about one-third of their maximal bite force (Gibbs et al 1981). The chewing forces of denture wearers are even more limited because of the discomfort and pain in the oral tissues provoked by the dislodgement and instability of the dentures under these maximal loads (O'Rourke, 1949). Furthermore, it is possible that experimental penetration forces give too optimistic a picture of the clinical management of the dentures, because the major portion of the bite energy in the oral environment seems to be used up by the dentures and the supporting tissues (Glantz & Stafford, 1985).…”

Section: Discussionmentioning

confidence: 99%

“…It is reasonable to assume that the major cause for the rejection of particular food items from the diet is the high force in relation to the physico-functional properties of the dentures that is needed in chewing these foods (O'Rourke, 1949;Glantz & Stafford, 1985). Therefore, the force required by complete denture teeth for penetrating the bolus becomes critically important in the consideration of what complete denture wearers can or cannot do with their dentures.…”

Section: Introductionmentioning

confidence: 99%

Forces required by complete dentures for penetrating food in simulated function

Eerikäinen

Könönen

1987

J of Oral Rehabilitation

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Forces required by complete dentures for penetrating some commonly used food items were measured experimentally. These forces were compared with the maximal bite forces of twenty-seven complete denture wearers. Food items that required the greatest forces in direct closure were rye bread (167 N), raw carrot (118 N), boiled meat (80 N), and raw cabbage (74 N). Raw carrot and raw cabbage required the greatest force in straight incision (39 N and 33 N, respectively). Simulated laterotrusion aided most in the penetration of rye bread and boiled meat. The penetration forces in simulated conditions were high compared with the maximal bite forces of the complete denture wearers.

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“…This factor is generally accepted as a limitation when measuring maximum bite force (11,12). With fully extended dentures, an increase of the anterior load only moderately above the patient-governed maximum elicited pain reactions.…”

Section: Discussionmentioning

confidence: 99%

Retention of complete maxillary dentures related to soft tissue function

Ørstavik

Fløystrand

1984

Acta Odontologica Scandinavica

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The influence of free tongue, lip, and cheek function on the retention of complete maxillary dentures was investigated for five experienced denture wearers. Test dentures were designed with full palatal coverage and functionally determined filling in of the vestibular sulcus. The front teeth were arranged primarily to meet cosmetic demands--that is, anterior to the top of the residual alveolar ridge. Retention was measured as resistance to dislodgement-provoking loads applied vertically to the incisive edge of the central incisors, using a miniature bite force recorder. All the participants were able to load their front teeth with 35 N or more without loss of retention. None of them experienced denture dislodgement provided the tongue, lips, and cheeks wee allowed to act freely. If the peripheral soft tissues were separated from the vestibular denture flange, no obvious effect on denture retention could be detected. Physically preventing the tongue from pressing against the posterior part of the denture reduced the retention significantly. Measurements of anterior loads tolerated after stepwise reductions of the denture extension indicated that the tongue acted primarily by pressure against the tuber regions. Tongue pressure against the central parts of the palate and lip or cheek pressure against the vestibular flange seemed to be of less importance.

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Significance of Tests for Biting Strength

Cited by 32 publications

References 4 publications

Comminution of Food with Mandibular Implant-retained Overdentures

Comminution of Food with Mandibular Implant-retained Overdentures

Forces required by complete dentures for penetrating food in simulated function

Retention of complete maxillary dentures related to soft tissue function

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