Fig. 5. PROMs over 5 years: improvement of satisfaction from loading to study end
Fig. 5. PROMs over 5 years: improvement of satisfaction from loading to study end
Fig. 4. Soft tissue parameters at 5-year post-loading. a Plaque index: score 0, no plaque detected; score 1, plaque only recognized by running a probe across the smooth marginal surface of the implant; score 2, plaque seen by the naked eye; score 3, abundance of soft matter. b Sulcus bleeding index: score 0, no bleeding when a periodontal probe was passed along the gingival margin adjacent to th...
Fig. 3. Standardized peri-apical radiographs representing the bone level changes at the implant level: immediately post insertion (a), at loading (abutment/crown placement) (b), and at 5-year post-loading (c)
Fig. 3. Standardized peri-apical radiographs representing the bone level changes at the implant level: immediately post insertion (a), at loading (abutment/crown placement) (b), and at 5...
Fig. 2. Kaplan-Meier cumulative survival rate
Fig. 2. Kaplan-Meier cumulative survival rate
Fig. 1. Study flow-chart: assessments and reason for dropouts. Study visits were done according to standard procedures in the respective study centers. Blue, mandatory visits; gray, optional visits
Fig. 1. Study flow-chart: assessments and reason for dropouts. Study visits were done according to standard procedures in the respective study centers. Blue, mandatory visits; gray, optional visits
Bone level changenMeanSDInsertion-loading103− 0.520.55Loading-1-year follow-up93− 0.040.37Loading-3-year follow-up90− 0.040.40Loading-5-year follow-up86− 0.090.43Table 3 Mean crestal bone level changes in mm
CharacteristicsCategoryTotalTotal patients/implantsn94/130Center 19/17Center 218/26Center 320/26Center 414/16Center 518/26Center 615/19Gender, n (%)Male30 (31.9)Female64 (68.1)Age at surgery, yearsMean ± SD50.4 ± 13.7Range (min/max)19.1-75.6Age range distribution, n (%)< 30 years8 (8.5)30-45 years22 (23.4)45-60 years38 (40.4)60-75 years25 (26.6)> 75 years1 (1.1)Tobacco use, n (%)Non-sm...
Time periodPatientsImplantsBefore loading58Loading-1 year681-3 years673-5 years13Total1826Table 1 Dropouts over observation time
Ackermann, KL., Barth, T., Cacaci, C. et al. Clinical and patient-reported outcome of implant restorations with internal conical connection in daily dental practices: prospective observational multicenter trial with up to 7-year follow-up.
Int J Implant Dent 6, 14 (2020). https://doi.org/10.1186/s40729-020-00211-z
Download citation
Received: 16 December 2019
Accepted: 12 Ma...
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material...
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
A written consent was given by all patients after being informed of the study. The study was performed following the declaration of Helsinki. Ethics committee approval was obtained from the international ethical committee of Freiburg (Germany, Ref. 010/1833).
Not applicable.
All authors declare that they have no conflicts of interest regarding this study. All authors have been lecturing for Caml...
Filderstadt, Germany
Karl-Ludwig Ackermann
Leipzig, Germany
Thomas Barth
Munich, Germany
Claudio Cacaci
Landsberg a. L., Germany
Steffen Kistler
Forchheim, Germany
Markus Schlee
Department of Maxillofacial Surgery, Goethe University Frankfurt, Frankfurt, Germany
Markus Schlee
Berlin, Germany
Michael Stiller
You can also search for this author in
PubMed Googl...
This study was funded by an unrestricted grant (NISCAM01/10) of the Oral Reconstruction Foundation (previously CAMLOG Foundation).
The authors thank Lucius Keller of Touchpoint Communication AG (Luzern, Switzerland) for the medical writing support.
Chang M, Odman PA, Wennstrom JL, Andersson B. Esthetic outcome of implant-supported single-tooth replacements assessed by the patient and by prosthodontists. Int J Prosthodont. 1999;12(4):335–41.
Kiltz U, Winter J, Schirmer M, Weber U, Hammel L, Baraliakos X, et al. German translation and cross-cultural adaptation of the ASAS health index: an ICF-based instrument for documentation of functional...
Ravald N, Dahlgren S, Teiwik A, Grondahl K. Long-term evaluation of Astra Tech and Branemark implants in patients treated with full-arch bridges. Results after 12-15 years. Clin Oral Implants Res. 2013;24(10):1144–51.
Schwarz F, Alcoforado G, Nelson K, Schaer A, Taylor T, Beuer F, et al. Impact of implant-abutment connection, positioning of the machined collar/microgap, and platform switching...
Gupta S, Sabharwal R, Nazeer J, Taneja L, Choudhury BK, Sahu S. Platform switching technique and crestal bone loss around the dental implants: a systematic review. Ann Afr Med. 2019;18(1):1–6.
Hsu YT, Lin GH, Wang HL. Effects of platform-switching on peri-implant soft and hard tissue outcomes: a systematic review and meta-analysis. Int J Oral Maxillofac Implants. 2017;32(1):e9–e24.
Nelson K,...
Cacaci C, Ackermann KL, Barth T, Kistler S, Stiller M, Schlee M. A non-interventional multicenter study to document the implants success and survival rates in daily dental practices of the CONELOG screw-line implant. Clin Oral Investig. 2019;23(6):2609–16.
Cochran D, Oates T, Morton D, Jones A, Buser D, Peters F. Clinical field trial examining an implant with a sand-blasted, acid-etched surface...
Krennmair G, Seemann R, Weinlander M, Piehslinger E. Comparison of ball and telescopic crown attachments in implant-retained mandibular overdentures: a 5-year prospective study. Int J Oral Maxillofac Implants. 2011;26(3):598–606.
Slot W, Raghoebar GM, Cune MS, Vissink A, Meijer HJA. Four or six implants in the maxillary posterior region to support an overdenture: 5-year results from a randomize...
Adverse event
Bone level change
Distance implant shoulder to first visible bone contact
Orthopantomogram
Plaque index
Patient reported outcome measures
Platform switching
Sulcus bleeding index
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
This prospective observational multicenter study demonstrated successful functional and esthetic outcomes of the study implant restorations (single tooth restoration, fixed partial dentures) with reliable peri-implant hard and soft tissue stability and high patients’ satisfaction. The results are comparable with the outcome of already published controlled randomized clinical studies and retrospe...
In recent years, patients’ needs have increased in terms of the esthetic and functional outcome of the dental restoration. PROMs have been reported in several studies and represent a well-described non-invasive method to measure patient’s satisfaction with these needs; however, they might present a lack of standardization [39, 40] due to the very subjective view on esthetics or functionality o...
Changes in crestal bone level are well-documented in the literature. Bone remodeling is reported to take place between surgery and loading. The reported changes are generally around 0.5 mm [17, 27, 30] but can reach more than 1 mm [31] in randomized or observational trials. The present study is well in accordance with these findings with its bone remodeling of − 0.52 ± 0.55 mm. Nearly 45%...
Endosseous dental implants are a commonly accepted treatment procedure and showed high survival and success rates as well as good functional performance in numerous clinical trials and retrospective analyses, also for Conelog implants as for their specific implant surface [17, 23, 26]. However, in general, one could argue that results of controlled clinical studies do not reflect the real situatio...
Table 3 shows the mean bone level changes of the implants with available radiographs from insertion to 5-year post-loading. Bone remodeling around the implant was noticeable from surgery to loading, presenting a mean value of − 0.52 ± 0.55 mm. From loading to the 5-year follow-up, the mean change in crestal bone remained clinically stable (−0.09 ± 0.43 mm) (Fig. 3).
Split into three g...
The study was started with 94 patients with 130 implants. At the end of the study (5-year post-loading), 76 patients with 104 implants were considered for analysis. Dropouts were distributed over the time of the study as described in Table 1. The majority of dropouts occurred early in the study phase. The reasons for the dropouts were variable as described in Fig. 1.
The demographic and clinica...
The study data, soft and hard tissue parameters as well as the PROMs were descriptively analyzed using IBM SPSS V25.0 (IBM Corp., Armonk, NY, USA): Categorical variables were shown with frequencies and mean values were used for continuous variables. Survival analysis was performed using Kaplan–Meier method. Time of loading was the study baseline as per protocol, and the statistical unit was the ...
Patients were scheduled to follow-ups at 6 months, 1-, 2-, 3-, 4-, and 5-year post-loading for the assessment of the study parameter (Fig. 1). Depending on the investigators’ standard post-operative protocol, follow-up appointments were scheduled slightly differently: One center skipped the control visits at 6 months. Additionally, due to the observational character of the study and the pati...
This is an observational multicenter clinical study, approved by the ethics committee of the Freiburg ethics commission international (feci 010/1833). The study was planned and conducted according to the German medical devices law, the Declaration of Helsinki, good clinical practice, and the reporting is aligned with the STROBE statement. A minimum of 90 to 100 patients were planned to be included...
Features of the chosen implant system for a study may also influence the outcome of the treatment: The degree of the manufacturer’s tolerances of implants with a conical implant-abutment connection heightens the risk of a mispositioning of the abutment, which cannot be corrected by repeated torqueing. Platform switching (PS) implants tend to have a protective effect on hard implant tissue outcom...
Many randomized controlled clinical trials have been published about dental implants. They have demonstrated long-term success in the rehabilitation of edentulous patients [1, 2] as well as patients with single or multiple teeth replacements [3, 4].
While this type of trials have an indispensable place in establishing a new product or a new operation technique regarding safety and efficacy, the r...
The interpretation of the results of randomized clinical trials is often questioned in relation with daily circumstances in practices. This prospective observational multicenter study was instigated to reflect the need for information in real-life situations with dental implants with internal conical implant-abutment connection (Conelog implant system). The implants were followed up at least 5-yea...
Fig. 5. PROMs over 5 years: improvement of satisfaction from loading to study end
Fig. 5. PROMs over 5 years: improvement of satisfaction from loading to study end
Fig. 4. Soft tissue parameters at 5-year post-loading. a Plaque index: score 0, no plaque detected; score 1, plaque only recognized by running a probe across the smooth marginal surface of the implant; score 2, plaque seen by the naked eye; score 3, abundance of soft matter. b Sulcus bleeding index: score 0, no bleeding when a periodontal probe was passed along the gingival margin adjacent to th...
Fig. 3. Standardized peri-apical radiographs representing the bone level changes at the implant level: immediately post insertion (a), at loading (abutment/crown placement) (b), and at 5-year post-loading (c)
Fig. 3. Standardized peri-apical radiographs representing the bone level changes at the implant level: immediately post insertion (a), at loading (abutment/crown placement) (b), and at 5...
Fig. 2. Kaplan-Meier cumulative survival rate
Fig. 2. Kaplan-Meier cumulative survival rate
Fig. 1. Study flow-chart: assessments and reason for dropouts. Study visits were done according to standard procedures in the respective study centers. Blue, mandatory visits; gray, optional visits
Fig. 1. Study flow-chart: assessments and reason for dropouts. Study visits were done according to standard procedures in the respective study centers. Blue, mandatory visits; gray, optional visits
Bone level changenMeanSDInsertion-loading103− 0.520.55Loading-1-year follow-up93− 0.040.37Loading-3-year follow-up90− 0.040.40Loading-5-year follow-up86− 0.090.43Table 3 Mean crestal bone level changes in mm
CharacteristicsCategoryTotalTotal patients/implantsn94/130Center 19/17Center 218/26Center 320/26Center 414/16Center 518/26Center 615/19Gender, n (%)Male30 (31.9)Female64 (68.1)Age at surgery, yearsMean ± SD50.4 ± 13.7Range (min/max)19.1-75.6Age range distribution, n (%)< 30 years8 (8.5)30-45 years22 (23.4)45-60 years38 (40.4)60-75 years25 (26.6)> 75 years1 (1.1)Tobacco use, n (%)Non-sm...
Time periodPatientsImplantsBefore loading58Loading-1 year681-3 years673-5 years13Total1826Table 1 Dropouts over observation time
Ackermann, KL., Barth, T., Cacaci, C. et al. Clinical and patient-reported outcome of implant restorations with internal conical connection in daily dental practices: prospective observational multicenter trial with up to 7-year follow-up.
Int J Implant Dent 6, 14 (2020). https://doi.org/10.1186/s40729-020-00211-z
Download citation
Received: 16 December 2019
Accepted: 12 Ma...
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material...
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
A written consent was given by all patients after being informed of the study. The study was performed following the declaration of Helsinki. Ethics committee approval was obtained from the international ethical committee of Freiburg (Germany, Ref. 010/1833).
Not applicable.
All authors declare that they have no conflicts of interest regarding this study. All authors have been lecturing for Caml...
Filderstadt, Germany
Karl-Ludwig Ackermann
Leipzig, Germany
Thomas Barth
Munich, Germany
Claudio Cacaci
Landsberg a. L., Germany
Steffen Kistler
Forchheim, Germany
Markus Schlee
Department of Maxillofacial Surgery, Goethe University Frankfurt, Frankfurt, Germany
Markus Schlee
Berlin, Germany
Michael Stiller
You can also search for this author in
PubMed Googl...
This study was funded by an unrestricted grant (NISCAM01/10) of the Oral Reconstruction Foundation (previously CAMLOG Foundation).
The authors thank Lucius Keller of Touchpoint Communication AG (Luzern, Switzerland) for the medical writing support.
Chang M, Odman PA, Wennstrom JL, Andersson B. Esthetic outcome of implant-supported single-tooth replacements assessed by the patient and by prosthodontists. Int J Prosthodont. 1999;12(4):335–41.
Kiltz U, Winter J, Schirmer M, Weber U, Hammel L, Baraliakos X, et al. German translation and cross-cultural adaptation of the ASAS health index: an ICF-based instrument for documentation of functional...
Ravald N, Dahlgren S, Teiwik A, Grondahl K. Long-term evaluation of Astra Tech and Branemark implants in patients treated with full-arch bridges. Results after 12-15 years. Clin Oral Implants Res. 2013;24(10):1144–51.
Schwarz F, Alcoforado G, Nelson K, Schaer A, Taylor T, Beuer F, et al. Impact of implant-abutment connection, positioning of the machined collar/microgap, and platform switching...
Gupta S, Sabharwal R, Nazeer J, Taneja L, Choudhury BK, Sahu S. Platform switching technique and crestal bone loss around the dental implants: a systematic review. Ann Afr Med. 2019;18(1):1–6.
Hsu YT, Lin GH, Wang HL. Effects of platform-switching on peri-implant soft and hard tissue outcomes: a systematic review and meta-analysis. Int J Oral Maxillofac Implants. 2017;32(1):e9–e24.
Nelson K,...
Cacaci C, Ackermann KL, Barth T, Kistler S, Stiller M, Schlee M. A non-interventional multicenter study to document the implants success and survival rates in daily dental practices of the CONELOG screw-line implant. Clin Oral Investig. 2019;23(6):2609–16.
Cochran D, Oates T, Morton D, Jones A, Buser D, Peters F. Clinical field trial examining an implant with a sand-blasted, acid-etched surface...
Krennmair G, Seemann R, Weinlander M, Piehslinger E. Comparison of ball and telescopic crown attachments in implant-retained mandibular overdentures: a 5-year prospective study. Int J Oral Maxillofac Implants. 2011;26(3):598–606.
Slot W, Raghoebar GM, Cune MS, Vissink A, Meijer HJA. Four or six implants in the maxillary posterior region to support an overdenture: 5-year results from a randomize...
Adverse event
Bone level change
Distance implant shoulder to first visible bone contact
Orthopantomogram
Plaque index
Patient reported outcome measures
Platform switching
Sulcus bleeding index
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
This prospective observational multicenter study demonstrated successful functional and esthetic outcomes of the study implant restorations (single tooth restoration, fixed partial dentures) with reliable peri-implant hard and soft tissue stability and high patients’ satisfaction. The results are comparable with the outcome of already published controlled randomized clinical studies and retrospe...
In recent years, patients’ needs have increased in terms of the esthetic and functional outcome of the dental restoration. PROMs have been reported in several studies and represent a well-described non-invasive method to measure patient’s satisfaction with these needs; however, they might present a lack of standardization [39, 40] due to the very subjective view on esthetics or functionality o...
Changes in crestal bone level are well-documented in the literature. Bone remodeling is reported to take place between surgery and loading. The reported changes are generally around 0.5 mm [17, 27, 30] but can reach more than 1 mm [31] in randomized or observational trials. The present study is well in accordance with these findings with its bone remodeling of − 0.52 ± 0.55 mm. Nearly 45%...
Endosseous dental implants are a commonly accepted treatment procedure and showed high survival and success rates as well as good functional performance in numerous clinical trials and retrospective analyses, also for Conelog implants as for their specific implant surface [17, 23, 26]. However, in general, one could argue that results of controlled clinical studies do not reflect the real situatio...
Table 3 shows the mean bone level changes of the implants with available radiographs from insertion to 5-year post-loading. Bone remodeling around the implant was noticeable from surgery to loading, presenting a mean value of − 0.52 ± 0.55 mm. From loading to the 5-year follow-up, the mean change in crestal bone remained clinically stable (−0.09 ± 0.43 mm) (Fig. 3).
Split into three g...
The study was started with 94 patients with 130 implants. At the end of the study (5-year post-loading), 76 patients with 104 implants were considered for analysis. Dropouts were distributed over the time of the study as described in Table 1. The majority of dropouts occurred early in the study phase. The reasons for the dropouts were variable as described in Fig. 1.
The demographic and clinica...
The study data, soft and hard tissue parameters as well as the PROMs were descriptively analyzed using IBM SPSS V25.0 (IBM Corp., Armonk, NY, USA): Categorical variables were shown with frequencies and mean values were used for continuous variables. Survival analysis was performed using Kaplan–Meier method. Time of loading was the study baseline as per protocol, and the statistical unit was the ...
Patients were scheduled to follow-ups at 6 months, 1-, 2-, 3-, 4-, and 5-year post-loading for the assessment of the study parameter (Fig. 1). Depending on the investigators’ standard post-operative protocol, follow-up appointments were scheduled slightly differently: One center skipped the control visits at 6 months. Additionally, due to the observational character of the study and the pati...
This is an observational multicenter clinical study, approved by the ethics committee of the Freiburg ethics commission international (feci 010/1833). The study was planned and conducted according to the German medical devices law, the Declaration of Helsinki, good clinical practice, and the reporting is aligned with the STROBE statement. A minimum of 90 to 100 patients were planned to be included...
Features of the chosen implant system for a study may also influence the outcome of the treatment: The degree of the manufacturer’s tolerances of implants with a conical implant-abutment connection heightens the risk of a mispositioning of the abutment, which cannot be corrected by repeated torqueing. Platform switching (PS) implants tend to have a protective effect on hard implant tissue outcom...
Many randomized controlled clinical trials have been published about dental implants. They have demonstrated long-term success in the rehabilitation of edentulous patients [1, 2] as well as patients with single or multiple teeth replacements [3, 4].
While this type of trials have an indispensable place in establishing a new product or a new operation technique regarding safety and efficacy, the r...
The interpretation of the results of randomized clinical trials is often questioned in relation with daily circumstances in practices. This prospective observational multicenter study was instigated to reflect the need for information in real-life situations with dental implants with internal conical implant-abutment connection (Conelog implant system). The implants were followed up at least 5-yea...
Figure 4. Patient satisfaction throughout the study
Figure 3. Bone level changes from loading to 5-year follow up
Figure 2. Clinical parameters and soft tissue parameters. a Modified plaque index. Error bars indicate standard deviation. * = p ≤ 0.05, *** = p ≤ 0.001. b Sulcus bleeding index. Error bars indicate standard deviation. * = p ≤ 0.05, *** = p ≤ 0.001. c Pocket probing depth. The asterisk represents statistically significant differences (* = p ≤ 0.05) observed between ...
Figure 1. Study flow diagram: follow up status and reasons for not completing the study; six-month, 2-year and 4-year follow up was optional
Figure 1. Study flow diagram: follow up status and reasons for not completing the study; six-month, 2-year and 4-year follow up was optional
Table 4 Life table analysis showing the cumulative success rate according to Albrektsson et al. and Buser et al.
Interval(months)
Implants in interval
According to Albrektsson et al.
According to Buser et al.
Implants withdrawn during interval
Failures during interval
Cumulative success rate (%)
Implants withdrawn during interval
Failures during interval
Cumulativ...
Table 3 Patient demographics with respect to implants
Overall
Subgroup*
Platform switching
Platform matching
Total Implants, n
285
203*
68*
Number of implants placed per patient, n (%)
1
125 (63.8)
97 (67.4)
20 (48.8)
2
56 (28.6)
37 (25.7)
16 (39.0)
3
12 (6.1)
7 (4.9)
5 (12.2)
4
3 (1.5)
3 (2.1)
0 (0.0)
Implant...
Table 2 Patient demographics
Overall
Subgroup*
Platform switching
Platform matching
Patients, n (%)
196 (100)
144
41
Sex, n (%)
Male
87 (44.4)
62 (43.1)
19 (46.3)
Female
109 (55.6)
82 (56.9)
22 (53.7)
Age, years
Mean (SD)
51.5 (14.2)
53.1 (14.4)
47.4 (12.9)
Range
17.9–82.1
17.9–82.1
19.3–78.5
Pr...
Investigator*
City/country
Number of patients included
Number of implants included
Dr. Helfried Hulla
Strass in Steiermark, Austria
10
15
Prof. DDr. Gerald Krennmair
Marchtrenk, Austria
10
20
Dr. S. Marcus Beschnidt (PI)
Baden-Baden, Germany
8
12
Dr. Karl-Ludwig Ackermann
Filderstadt, Germany
14
18
Dr. Thomas Barth
Leipzig, Germany
15
28
Dr...
Abbreviations
ASA:
American Society of Anesthesiologists
MPI:
Modified Plaque Index
PPD:
Pocket probing depth
RCT:
Randomized controlled clinical trial
SBI:
Sulcus Bleeding Index
SD:
Standard deviation
SLA:
Sand-blasted, large grit, acid-etched
References
Hjalmarsson L, Gheisarifar M, Jemt T. A systematic review of survival of s...
The appearance of poorer oral hygiene later in the study also appears to correspond with the drop in follow-up attendance, which again supports the importance of follow-up. All other complications could be resolved and were not persisting. Furthermore, patients selected for inclusion in this study were optimal candidates for dental implants. Though the inclusion criteria predestinate the patient s...
At 5-year follow-up, the overall SBI was 0.32 ± 0.49, reflective of no bleeding given that 0 equals no bleeding and 1 equals isolated bleeding spots visible [27]. The PPD initially decreased within the first 6 months from which point it significantly increased to 2.34 ± 1.18 mm at 5-year follow-up.
Nevertheless, the measured mean PPD still reflects the norm for conventionally placed i...
On the one hand, the variety of bone level changes in this study may be explained by different vertical soft tissue thicknesses, but cannot be validated due to these missing data. On the other hand, there are multiple confounding factors influencing the change in bone level, such as the size of the platform (mismatch), occlusal loading, and the microgap. Additional to the standard success criteria...
Over the 5-year study period, we report
At 3-year follow-up, bone loss was noted in one patient (reclassified as peri-implantitis at the 4-year follow-up) and an important bone loss (due to poor oral hygiene and bruxism; two implants) in a patient with psychosocial issues who could not be treated during the study. Such a patient would not have been included in an RCT.
Consequently, three implants were lost based on the bone loss criter...
Discussion and conclusions
This large, multicenter study provides real-life long-term data on 285 implants placed in 196 patients. The results show that the placement of CAMLOG SCREW-LINE implants with platform-matching or platform-switching abutments results in high survival and success in the long term. The overall success rate for implants was 97.1% at 5-year post-loading, and 97.4% and 96.2...
Jemt papilla score
At loading, the Jemt papilla score was 1.93 ± 1.01, significantly increasing to 2.14 ± 0.95 at 5-year follow-up (p = 0.023) (Fig. 2d). For the platform-switching subgroup, a significant difference was observed between baseline and 5-year follow-up (p
Implant survival
The cumulative survival rate was 100% at 1-year follow-up, 99.6% at 3-year follow-up, and 98.6% at 5-year follow-up. All three late failures were in the platform-switching subgroup.
Clinical parameters/soft tissue parameters
Plaque index
Mean modified plaque indices were very low at below 0.5 for all but one measurement throughout the course of the study (Fig. 2a). At loading...
Results
Patient demographics
In total, 196 patients from 17 centers met the inclusion criteria for this study and were included in the per-protocol analysis. In total, 285 implants were placed (Table 1). At the 5-year follow-up, data were available for the 137 patients who completed the study (Fig. 1). Patient demographic data is presented in Tables 2 and 3.
Implant success
Implant success...
The primary stability of the implant was assessed during surgery. Implant success and survival were evaluated in the group of implants restored with abutments [5, 29] at both placements of the provisional and definitive prostheses and at each follow-up visit thereafter. Implants were deemed successful in accordance with the criteria for implant success laid down by Albrektsson et al. [30]. Implan...
Assessments
Throughout the study, only radiographs consistent with standard implant procedures were taken. Bone level changes were assessed based on available and evaluable standardized periapical radiographs with a film-holder using parallel-technique or panoramic radiographs (depending on the standard in the study centers). Baseline was defined as the time of the first prosthetic installati...
The treatment indications were single or multiple tooth replacement in the maxilla or mandible without the use of simultaneous augmentation or membrane, of which the implants were to be restored with either fixed single crown or fixed partial denture restorations.
Treatment procedure
Patients were to be treated according to standard practice for implant procedures applicable in the countries par...
Methods
Study design
This was a prospective multicenter non- interventional study to assess implant success and survival rates in daily dental practices using the CAMLOG SCREW-LINE implants (CAMLOG Biotechnologies AG, Basel, Switzerland) used with or without platform-switching abutments. Patients were enrolled over a period of 2 years from October 2008 to September 2010 from 17 sites across f...
In the present study, CAMLOG SCREW-LINE implants with the Promote plus surface (sandblasted and acid-etched surface) were used. These implants in combination with platform-matching abutments have been shown to have high long-term success rates ranging from 97.8 to 100% at 5-year to 10-year follow-up [9,10,11,12,13]. They can be restored with either platform-matching or platform-switching abutments...
Background
Success and survival rates of endosseous implants are well-documented in a number of controlled clinical trials and systematic reviews [1,2,3]. Generally, controlled trials evaluate endosseous implants in specific clinical situations; thus, the patient population is subjected to rigorous inclusion criteria and follow-up. Accordingly, controlled clinical trials do not reflect th...
Implant success and survival rates in daily dental practice: 5-year results of a non-interventional study using CAMLOG SCREW-LINE implants with or without platform-switching abutments
Abstract
Background
The performance of dental implants in controlled clinical studies is often investigated in homogenous populations. Observational studies are necessary to evaluate the outcome of implant resto...