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KMID : 1004520230390040214
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Journal of Dental Rehabilitation and Applied Science
2023 Volume.39 No. 4 p.214 ~ p.221
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Neutral zone and alveolar relation consideration for fabricating complete denture in a patient with severe alveolar bone resorption: a case report
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Kim Hyung-Jun
Jang Woo-Hyung
Park Chan
Yun Kwi-Dug
Lim Hyun-Pil
Park Sang-Won
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Abstract
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In order to fabricate stable dentures in patients with severe resorption of residual ridges, various factors must be considered. One of them is the neutral zone, which is defined as the potential region in which the pressure of the tongue outward in the oral cavity and the pressure of the cheeks and lips directed inward from the outside of the oral cavity equalize during functioning. In patients with severe ridge resorption, if the teeth are usually arranged above the residual ridge, the teeth are located on the lingual side rather than the original position. Therefore, the functional space of the tongue is invaded, the tongue is positioned backward, and the sealing of the lingual border is broken, which acts as a factor reducing the maintenance of denture. In addition, it is also important for the stability of dentures to assume an interalveolar crest line connecting the maxillary and mandibular ridge crests, and to arrange the maxillary and mandibular artificial teeth to match the masticatory force to the interalveolar crest line. Therefore, good clinical results were obtained by fabricating dentures for the patient with poor alveolar residual ridge using neutral zone impression and ridge relationship analysis.
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KEYWORD
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complete denture, neutral zone, residual ridge
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