Comminution of Food with Mandibular Implant-retained Overdentures

Abstract

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.

Functional Tooth Regeneration Using a Bioengineered Tooth Unit as a Mature Organ Replacement Regenerative Therapy

“…The calcein-labeled bone finally disappeared and the recipient bone around the bioengineered tooth root replaced it completely at 40 days after transplantation at a frequency of 66/83 (79.5%; figure 2C, D, figure S2B). There have been many previously reported clinical cases of multiple tooth loss, the most serious condition being edentulism [29]. It is possible that a bioengineered teeth unit could be transplanted into an edentulous jaw (figure S2E, F).…”

Technical Quality of Complete Dentures: Influence on Masticatory Efficiency and Quality of Life

“…Patients’ adaptive skills were not evaluated. The use of implant‐supported prostheses can also influence prosthesis stability, but this was not the aim of this study …”

“…In these cases, significant increases in patient satisfaction and oral health‐related quality of life (OHRQoL) may be observed with implant‐retained dentures . The use of an implant‐supported prosthesis can also influence prosthesis stability and improve masticatory performance …”

Two implant retained overdentures––A review of the literature supporting the McGill and York consensus statements

“…This review looked at all studies regardless of the number of implants used for support. In 7 studies, ISOD's were retained by two implants [21][22][23][24][25][26][27] and in three studies, ISOD's were supported by between 4 and 6 implants. Of the studies that evaluated systems retained by two implants, 2 were RCTs (4 papers) 21-24 , 3 were prospective studies with within-subject evaluation and 1 was a retrospective study.…”