Figure 6. Marginal bone loss (MBL) in SLA and MK-III implants within the abnormal group. MBL is significantly larger in MK-III implants than SLA implants during the follow-up period.
Figure 5. Cancellous bone densities in SLA and MK-III implants within the abnormal group. The cancellous bone density shows no significant difference between SLA and MK-III implants at baseline
Figure 4. Cancellous bone densities in the normal and abnormal groups of women are shown. Cancellous bone density is significantly higher in the normal group than in the abnormal group
Figure 3. The overview on BTM values are shown. The bone turnover markers measured are osteocalcin (OC), bone-specific alkaline phosphatase (BAP), pyridinoline cross-linked carboxyterminal telopeptide of type I collagen (ICTP), and crosslinked N-telopeptide of type I collagen (NTX)
Normal group
Abnormal group
P value
r
Age [years]
57.3
63.1
0.038*
0.49
Male (%)
7 (100)
0 (0)
0.0043*
0.66
Female (%)
2 (18)
9 (82)
Follow-up period [months]
21.3
21.4
0.85
Case no.
Gender
Age [years]
Bone turnover marker
Position
Implant
Bone Density [HU]
Follow-up period [m]
Marginal bone loss [mm]
OC
BAP
ICTP
NTX
1
M
60.2
5.8
8.1
2.7
11.4
7┐
SLA
1112.63
10
-
6┐
SLA
815.75
10
-
2
M
51.3
4.9
9.9
3.0
12.0
6┐
SLA
746.00
6
0.32
5┐
SLA...
Figure 2. Measurement of marginal bone loss (MBL) on dental radiography. MBL is measured using Image J software (National Institutes of Health, Bethesda, MD, USA). The reference points for the measurements are the implant platform (the horizontal interface between the implant and the abutment), the implant tip, and the first bone-implant contact (FBIC). The length from the implant platform to th...
Figure 1. Measurements on computed tomography (CT) images. The imaging data are stored in Digital Imaging and Communications in Medicine format and loaded into an implant planning software program (Simplant®, Dentsply Implants, Leuven, Belgium). Buccopalatal or buccolingual cross-sectional CT slices are used to measure the bone density at the implant placement sites in Hounsfield units. The mea...
Many reports of the relationship between dental implants and osteoporosis have been published, but few have focused on bone quality. Bone quality is multifactorial and difficult to classify because it varies from patient to patient. The present study focused on BTM, which is one of the clinical indicators of bone quality. A prospective study confirmed that elevation of a BTM can predict frac...
The cancellous bone density in the abnormal BTM group was significantly lower than that in the normal BTM group. This suggests that cancellous bone with a high BTM was likely to actually be poor medullary bone. There were three patterns of low BMD: high values of bone formation markers only, high values of both bone formation and bone resorption markers, and high values of bone resorption ma...
Discussion
Nine (82%) of the11 female patients in this study had at least one BTM measurement outside the normal range. The abnormal BTM values in these women were pronounced. No abnormal BTM valued were observed among the men. According to the Japanese Guidelines for the Prevention and Treatment of Osteoporosis, the diagnostic criteria for osteoporosis include the following: (1) fragility ...
Results
Eighteen patients (11 women, 7 men; mean age 60.2 years) fulfilled the inclusion criteria. There was no significant difference between men (57.3 ± 5.0 years) and women (63.1 ± 6.0 years). After measuring the BTMs and assessing bone density, 35 implants were placed (18 MK-III, 17 SLA). The mean follow-up duration was 21.4 months (Table 1), during which time follow-up observatio...
Patient selection
Patients treated at Hiroshima University Hospital were included in the study if they remained partially edentulous in the planning area for at least 3 months, if one or two splinting fixed prostheses in the mandible posterior area were planned, if they had never been treated for osteoporosis, and if they had no subjective or objective symptoms of osteoporosis, such as back pai...
Surgery
Implants (SLA® (sandblasted and acid-etched, internal connection system), Straumann AG, Basel, Switzerland, or Branemark® System Mk-III (TiUnite, external connection system), Nobel Biocare, Gothenburg, Sweden) were used depending on the patient’s clinical characteristics. The operating surgeon was blinded to the bone analysis results and was unaware of the bone density...
Materials and methods
Patient selection
Patients treated at Hiroshima University Hospital were included in the study if they remained partially edentulous in the planning area for at least 3 months, if one or two splinting fixed prostheses in the mandible posterior area were planned, if they had never been treated for osteoporosis, and if they had no subjective or objective symptoms of osteo...
Background
Dental implants have become an established prosthodontic treatment for missing teeth, with survival rates now exceeding 97%. The most popular current method of bone quality assessment is that developed by Lekholm and Zarb, who introduced a scale that ranges from 1–4 and is based on a radiographic assessment and the sensation of resistance experienced by the surgeon when preparing t...
Abstract
Background
Bone quality is as important as bone mineral density in terms of bone strength. Bone turnover markers (BTMs) are clinical indicators of bone quality. In implant dentistry, bone quality is considered equivalent to bone density on radiographic assessments. The purpose of this study was to determine whether the BTM values are reflected in jawbone condition by evaluating the re...