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. 2015 Jun;7(3):191-8.
doi: 10.4047/jap.2015.7.3.191. Epub 2015 Jun 23.

Comparison of marginal bone loss and patient satisfaction in single and double-implant assisted mandibular overdenture by immediate loading

Sara Tavakolizadeh  1 , Fariborz Vafaee  2 , Masume Khoshhal  2 , Zahra Ebrahimzadeh  3
Affiliations

Comparison of marginal bone loss and patient satisfaction in single and double-implant assisted mandibular overdenture by immediate loading

Sara Tavakolizadeh et al. J Adv Prosthodont. 2015 Jun.

Abstract

Purpose: The purpose of this study was to compare the coronal bone level and patient satisfaction in 1-implant and 2-implant assisted mandibular overdentures.

Materials and methods: Twenty patients who had maladaptive mandibular dentures were treated in this study. Patients were randomly divided into two groups. The first group received 1 implant (Simple line II, Implantium, South Korea) in their mandibular midline and the second group received 2 implants in their B and D regions (according to Misch's category). If the primary stability of each implant was at least 60 ISQ, ball attachment was placed and denture relined with soft liner. After 6 weeks, retentive cap incorporated with hard acrylic resin. In the 6 and 12 months recalls, periapical digital radiograph were made and visual analogue scale questionnaires were used to record patient satisfaction. The Friedman test was done for comparing the presurgical and postsurgical parameters in each group and the U-Mann Whitney test (P<.05) was done for comparison of post-treatment results between the two groups.

Results: All implants achieved sufficient primary stability to be immediately loaded. Patient satisfaction was high, and there were no significant differences between two groups (P>.05). In addition, mean marginal bone loss was 0.6 ± 0.67 mm in the first group and 0.6 ± 0.51 mm in the second group, after 12 month. Mean marginal bone loss showed no significant differences between two groups.

Conclusion: This preliminary one-year result indicated that mandibular overdentures anchored to a single implant can be a safe and cost-effective method as a starting step for implant-overdenture treatment.

Keywords: Bone loss; Implant; Overdenture; Patients satisfaction.

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Figures

Fig. 1
Fig. 1. CBCT evaluation and electronic surgery.
Fig. 2
Fig. 2. Pilot hole in surgical stent as a guide for initial twist drill. (A) tissue surface, (B) polished surface.
Fig. 3
Fig. 3. RFA evaluation. (A) occlusal view, (B) lateral view.
Fig. 4
Fig. 4. Customized radiographic stent. (A) Upper view, (B) Lateral view.
Fig. 5
Fig. 5. Overdentures with incorporated metallic cap and O-ring.
Fig. 6
Fig. 6. Digital parallel periapical. (A) immediately after insertion, (B) 12 months later.
Fig. 7
Fig. 7. Improvement of oral function and comfort in single implant group.
Fig. 8
Fig. 8. Improvement of oral function and comfort in two-implant group.
See this image and copyright information in PMC

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