Marginal Bone Loss and Stability of Single-Implants Retaining Mandibular Overdentures
Objectives: The aim of this study was to evaluate marginal bone loss and stability of single-implants retaining mandibular overdentures by using direct (bone probing) and indirect (radiographic measurement) methods, during the 12-month follow-up period. Methods: Twenty-two edentulous patients (10 males and 12 females) with a mean age of 74.2 years (range 61-91 years) were enrolled in this study. A single implant (SLA BLT 4.1×10mm, Straumann AG, Basel, Switzerland) was placed in the midline of the mandible following a conventional loading protocol. After the healing period, locator attachments were connected to the implants. Marginal bone loss and implant stability were evaluated at implant placement (baseline) and 12-month follow-up visits. The implant stability quotient (ISQ) was recorded using a resonance frequency analysis device (Osstell, Gothenburg, Sweden). Direct measurements of the bony crest height were obtained at buccal, lingual, right, left positions of the implant with a customized abutment; and the radiographic assessment was conducted using standardized periapical radiographs with a long cone technique. Wilcoxon signed-rank test was performed to find differences between baseline and 12-month evaluations (α=0.05). Results: One implant was lost two months after the surgery, resulting in 21 patients for data analyses. The implant survival rate at 12-month follow-up was 95.5%. The mean change in ISQ was -1.14±4.24. In direct measurement, the mean bone loss was 0.67±0.79 mm. In radiographic measurement, the mean bone loss was 0.64±0.5 mm. There was a significant difference after 12 months in both direct and radiographic measurement. Conclusions: Marginal bone loss, implant stability, and survival rate of implants in single implant overdentures were comparable with previous reports. Single-implant treatment may be a feasible option for edentulous patients, especially geriatric population.
South East Asia Division Meeting
2018 South East Asia Division Meeting (Da Nang, Vietnam) Da Nang, Vietnam
2018 0115 Prosthodontics Research
Asami, Mari
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Kanazawa, Manabu
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Vo, Thuy
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Thu, Khaing
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Miyayasu, Anna
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Shimada, Ryo
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Sato, Daisuke
( Showa University Dental Hospital
, Tokyo
, Japan
)
Kasugai, Shohei
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
Minakuchi, Shunsuke
( Tokyo Medical and Dental University
, Tokyo
, Japan
)
the ITI Foundation, Switzerland (grant number 1025_2014)
None