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Bite Force and Masticatory Performance Using Implant-supported Overdentures After Treatment of Mandibular Cancer
Tomoki Sumida1, Yosuke Kobayashi2, Akiko Ishikawa3
1Department of Oral and Maxillofacial Surgery, Graduate School of Dental Science, Kyushu University, Fukuoka, Japan tomoki@dent.kyushu-u.ac.jp.
Aim:
To evaluate overdentures with regard to artificial restoration of oral function following mandibular cancer.
Materials And Methods:
We examined 32 patients who had undergone mandibular bone resection as treatment for malignancy and were using implant-supported overdentures. The patients were aged 55-87 years (mean=68.6) with a male to female ratio of 23:9. Marginal resection was performed in 29 patients and segmentectomy in 3.
Results:
Before and after using the attachment for overdenture, oral function differed significantly. After the setting of implant-retained overdentures, maximum bite force increased on average by 362% (average, from 16.2 N to 58.8 N; p<0.01). Xylitol gum examination showed a 363% increase in masticatory performance (average, 3.1 to 8.0 points; p<0.01).
Conclusion:
Implant-retained overdenture resulted in improved oral function, that was lost after treatment for mandibular cancer.
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