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Bone stability around implants in elderly patients with reduced bone mineral density – a prospective study on mandibular overdentures
Author(s) -
Chow Luke,
Chow Tak Wah,
Chai John,
Mattheos Nikos
Publication year - 2017
Publication title -
clinical oral implants research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.407
H-Index - 161
eISSN - 1600-0501
pISSN - 0905-7161
DOI - 10.1111/clr.12907
Subject(s) - medicine , dentistry , implant , bone mineral , osteoporosis , radiography , bone density , bleeding on probing , prospective cohort study , dental implant , femoral neck , surgery , periodontitis
Objective The purpose of this prospective clinical study was to determine whether reduced bone mineral density (BMD) is correlated with a higher risk for dental implant therapy in an elderly patient population. Material and methods Seventy‐nine patients recruited at the Prince Philip Dental Hospital were provided with 2‐implant‐supported mandibular overdentures. Skeletal BMD was recorded before the implant therapy. The World Health Organization Osteoporosis Diagnosis Classification (femoral neck score) was utilized to define the osteoporosis status of patients. Periapical radiographs were taken with a special radiographic holder at the time of implant loading (baseline) and at follow‐up examinations. The mesial and distal marginal bone levels of each implant were measured. The mean marginal bone loss (mMBL) and greatest marginal bone loss (GBL) of four implant sites at patient level were recorded for data analysis. Clinical examination including plaque score (PI) and bleeding on probing (BOP) was recorded. Results Of the 79 patients recruited in the study, the survival rate of implant was 98.7%. Sixty‐three patients (79.7%) were finally available for data collection and statistical analyses. The mean follow‐up time was 62.9 (SD = 15.2) months with the mean MBL 0.65 mm (SD = 0.67) and mean GBL 1.25 mm (SD = 0.83), respectively. The average BOP and PI of patients were 49.6% (SD = 30.8) and 47.4% (SD = 37.4). Only BOP was found significantly correlated with mMBL ( r = 0.321, P = 0.01). Skeletal BMD was not associated with marginal bone loss (mean MBL: r = −0.094, P = 0.466; mean GBL: r = 0.04, P = 0.761). Conclusions Within the limits of this study, osteoporosis was not a contraindication for implant therapy, and reduced skeletal BMD was not associated with increased marginal bone loss around implants or other complications in an elderly population.