{
    "abstract": "Controversy remains regarding the impact of palatal coverage or palatless designs for maxillary implant overdentures. This within subject study aimed to compare the swallowing threshold and efficiency of maxillary implant assisted overdentures with and without palatal coverage.\nThe study included 14 healthy completely edentulous subjects with ages ranged from 50 to 70 years. For each participants, four dental implants were inserted in the canines and premolars areas of the maxillary arch, and two implants in the canines region of the mandibular arch. Two designs of maxillary implant-assisted overdentures (with and without palatal covreage designs) and one design of mandibular implant overdenture were constructed for each patient. The overdentures were retained to the implants by using locator attachments. Swallowing threshold and efficiency were evaluated using Test of Mastication and Swallowing Solids (TOMASS). Swallowing evaluation was conducted 3 months after each maxillary implant overdenture design insertion, while the participants were eating solid food. Independent samples t-test was used to compare the differences between the two overdenture designs.\nThere was statistically significant reduction in swallowing threshold, number of swallows, number of masticatory cycles, and total ingestion time for the maxillary implant overdenture without palatal coverage (p\u2009<\u20090.05). However, there was non-significant difference in the number of bites between the two maxillary implant overdenture designs (p\u2009>\u20090.05).\nWithin the limitation of this study, it could be concluded that maxillary implant overdenture without palatal coverage improves chewing and swallowing efficiency for solid food.\nPalatal coverage with maxillary implant overdenture negatively affected bolus formation during oral food processing. Increased chewing cycles and time of mastication lead to increase the viscosity of the bolus, which might cause aspiration during swallowing. Maxillary implant overdenture without palatal coverage may be a viable treatment option as it improve the oral food processing for safe swallowing. In addition, TOMASS test is easy to be incorporated as part of the clinical evaluation of swallowing efficiency for solid foods processing.",
    "authors": [
        {
            "affiliation": "Department of Removable prosthodontics, Faculty of Dentistry, Mansoura University, Eldakahlia, 35516, Egypt. abdallahs@mans.edu.eg.",
            "firstname": "Abdallah Mohammed",
            "initials": "AM",
            "lastname": "Ibrahim"
        },
        {
            "affiliation": "Department of Removable prosthodontics, Faculty of Dentistry, Mansoura University, Eldakahlia, 35516, Egypt.",
            "firstname": "Elsayed Abdallah",
            "initials": "EA",
            "lastname": "Abdel-Khalek"
        },
        {
            "affiliation": "Department of Removable prosthodontics, Faculty of Dentistry, Mansoura University, Eldakahlia, 35516, Egypt.",
            "firstname": "Osama Mohammed",
            "initials": "OM",
            "lastname": "Askar"
        }
    ],
    "conclusions": "Within the limitation of this study, it could be concluded that maxillary implant overdenture without palatal coverage improves chewing and swallowing efficiency for solid food.",
    "copyrights": "\u00a9 2025. The Author(s).",
    "doi": "10.1007/s00784-025-06271-y",
    "journal": "Clinical oral investigations",
    "keywords": [
        "Implant overdenture",
        "Maxillary",
        "Palatless",
        "Swallowing efficiency",
        "Threshold"
    ],
    "methods": null,
    "publication_date": "2025-04-15",
    "pubmed_id": "40232545\n23737789\n27228249\n30825989\n20684439\n32655220\n11168249\n11843449\n17618916\n16900816\n23998138\n29534124\n22720290\n21414137\n23899103\n17441875\n29064764\n16722139\n25663715\n29130554\n30820207\n11084148\n24995263\n24262952\n28547793\n24694384\n27553043\n35809097\n24816250\n28677236\n30663183\n36036753\n16409511\n20083447\n34262969\n25936821\n23927717\n11922870\n14964052\n15111630\n17078978\n21923894",
    "results": "There was statistically significant reduction in swallowing threshold, number of swallows, number of masticatory cycles, and total ingestion time for the maxillary implant overdenture without palatal coverage (p\u2009<\u20090.05). However, there was non-significant difference in the number of bites between the two maxillary implant overdenture designs (p\u2009>\u20090.05).",
    "title": "Within-subject assessment of swallowing threshold and efficiency for maxillary implant assisted overdentures with and without palatal coverage.",
    "xml": "<Element 'PubmedArticle' at 0x78850692d4e0>"
}