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Purpose: To compare the effect of two treatment options in mandibular Kennedy class I cases regarding oral health related quality of life (OHRQoL) and the biting force, removable partial dentures retained by either precision attachment (PA-RPD) or clasps (C-RPD)Materials and methods: The study included 32 partially edentulous patients which 16 patients received PA-RPD (OT Cap Attachment) and 16 patients received C-RPD. All the patients in both groups were asked to fill the OHRQoL questionnaire after 1 week (baseline), 3 months, 6 months and 12 months after prosthesis insertion. Biting force was measured using the i-load Star Sensor one week, 3 months, 6 months and 1 year after partial denture insertion for all patients in both groups. Statistical analysis comprised Mann Whitney U test, Friedman’s test, Dunn’s test and Chi-square test.Results: The results of OHRQoL revealed that at the baseline, 3 months and 6 months the PA-RPD showed statistically significant lower mean total OHIP-14 score than the C-RPD. However, after 12 Monthes , there was no statistically significant difference between total OHIP-14 scores in the two groups. Concerning the biting force there was no statistically significant difference between the two groups.Conclusion: Within the limitations of this study it was concluded that the OHRQoL of both the PA-RPD and the C-RPD was comparable after 12 months. Similarly the biting force was the same for both treatment options.

Objectives: This study aimed to investigate masticatory muscle activity in patients treated with 2 modalities of implant mandibular overdenture prosthesis.Methodology: Fourteen completely edentulous male patients were selected and four implants were inserted for each patient. After 3 months of installation, the patients were equally divided into two groups; group I receiving overdentures retained with ball attachments and group II receiving telescopic retained overdentures. Muscle activity was measured at time of denture insertion, two weeks and one month after insertion. Results:The results revealed that muscle activity was significantly lower in telescopic retained overdentures compared to overdentures retained with ball attachments. Conclusion:Telescopic attachments decreased the effort exerted by the muscles compared to ball and socket attachments.KEY WORDS: muscular activity, implants, overdenture, telescopic attachments.(3544) Nada el khourzaty, et al.

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