A within-implant comparison to evaluate the concept of platform switching: a randomised controlled trial
- Author
- Stefan Vandeweghe (UGent) and Hugo De Bruyn (UGent)
- Organization
- Abstract
- PURPOSE: To evaluate whether platform switching could preserve marginal bone around implants up to 6 months after loading. MATERIALS AND METHODS: 15 patients were selected for a randomised controlled trial. Each patient received one customised wide body implant, with the external hex connection located eccentrically, allowing an extra 1 mm switch on one side. The hex was positioned at random at the mesial or distal side and the implant was loaded after 6 months of non-submerged healing. Patients were examined at 3, 6 and 12 months after surgery, during which a radiograph was taken to evaluate bone levels. At 12 months, the mucosal thickness was measured using a perio-probe. RESULTS: All implants survived and the mean overall bone loss, calculated from both the switched and non-switched side, was 0.39 mm (SD 0.33, range 0.00-1.45), 0.85 mm (SD 0.59, range 0.10-2.50) and 0.80 mm (SD 0.46, 0.26-1.89) after 3, 6 and 12 months, respectively. The bone loss continued up to 6 months but stabilised thereafter (P = 0.615). Significantly more bone loss was observed at the non-switched side compared to the switched side at 3 months (0.51 mm versus 0.28 mm, P = 0.019), 6 months (1.05 mm versus 0.64 mm, P = 0.002) and 12 months (0.94 mm versus 0.66 mm, P = 0.002). The mean mucosal thickness was 4.22 mm (SD 1.45; range 1.50-7.00), and was not significantly different between the switched and non-switched sides (P = 0.882). However, using a post-hoc analysis with the mean thickness as a threshold, the mean bone loss was only significantly different between switched and non-switched sides when the mucosa was thicker than 4.22 mm (P = 0.036). CONCLUSIONS: The outcome of this randomised trial is in accordance with earlier studies suggesting that that platform switching decreases bone loss by 30%. Although the sample size was limited, it seems that the creation of a biologic width affects peri-implant bone loss to a significant extent and that platform switching is only effective when the mucosal thickness allows the establishment of a biologic width.
- Keywords
- biologic width, southern implant, platform switching, crestal bone loss, RADIOGRAPHIC EVALUATION, CRESTAL BONE CHANGES, dental implant, SINGLE-TOOTH REPLACEMENTS, FINITE-ELEMENT-ANALYSIS, BIOLOGIC WIDTH, BACTERIAL-COLONIZATION, HISTOMETRIC EVALUATION, SUBMERGED IMPLANTS, DENTAL IMPLANTS, TITANIUM IMPLANTS
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-3071504
- MLA
- Vandeweghe, Stefan, and Hugo De Bruyn. “A Within-Implant Comparison to Evaluate the Concept of Platform Switching: A Randomised Controlled Trial.” EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY, vol. 5, no. 3, 2012, pp. 253–62.
- APA
- Vandeweghe, S., & De Bruyn, H. (2012). A within-implant comparison to evaluate the concept of platform switching: a randomised controlled trial. EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY, 5(3), 253–262.
- Chicago author-date
- Vandeweghe, Stefan, and Hugo De Bruyn. 2012. “A Within-Implant Comparison to Evaluate the Concept of Platform Switching: A Randomised Controlled Trial.” EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY 5 (3): 253–62.
- Chicago author-date (all authors)
- Vandeweghe, Stefan, and Hugo De Bruyn. 2012. “A Within-Implant Comparison to Evaluate the Concept of Platform Switching: A Randomised Controlled Trial.” EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY 5 (3): 253–262.
- Vancouver
- 1.Vandeweghe S, De Bruyn H. A within-implant comparison to evaluate the concept of platform switching: a randomised controlled trial. EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY. 2012;5(3):253–62.
- IEEE
- [1]S. Vandeweghe and H. De Bruyn, “A within-implant comparison to evaluate the concept of platform switching: a randomised controlled trial,” EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY, vol. 5, no. 3, pp. 253–262, 2012.
@article{3071504, abstract = {{PURPOSE: To evaluate whether platform switching could preserve marginal bone around implants up to 6 months after loading. MATERIALS AND METHODS: 15 patients were selected for a randomised controlled trial. Each patient received one customised wide body implant, with the external hex connection located eccentrically, allowing an extra 1 mm switch on one side. The hex was positioned at random at the mesial or distal side and the implant was loaded after 6 months of non-submerged healing. Patients were examined at 3, 6 and 12 months after surgery, during which a radiograph was taken to evaluate bone levels. At 12 months, the mucosal thickness was measured using a perio-probe. RESULTS: All implants survived and the mean overall bone loss, calculated from both the switched and non-switched side, was 0.39 mm (SD 0.33, range 0.00-1.45), 0.85 mm (SD 0.59, range 0.10-2.50) and 0.80 mm (SD 0.46, 0.26-1.89) after 3, 6 and 12 months, respectively. The bone loss continued up to 6 months but stabilised thereafter (P = 0.615). Significantly more bone loss was observed at the non-switched side compared to the switched side at 3 months (0.51 mm versus 0.28 mm, P = 0.019), 6 months (1.05 mm versus 0.64 mm, P = 0.002) and 12 months (0.94 mm versus 0.66 mm, P = 0.002). The mean mucosal thickness was 4.22 mm (SD 1.45; range 1.50-7.00), and was not significantly different between the switched and non-switched sides (P = 0.882). However, using a post-hoc analysis with the mean thickness as a threshold, the mean bone loss was only significantly different between switched and non-switched sides when the mucosa was thicker than 4.22 mm (P = 0.036). CONCLUSIONS: The outcome of this randomised trial is in accordance with earlier studies suggesting that that platform switching decreases bone loss by 30%. Although the sample size was limited, it seems that the creation of a biologic width affects peri-implant bone loss to a significant extent and that platform switching is only effective when the mucosal thickness allows the establishment of a biologic width.}}, author = {{Vandeweghe, Stefan and De Bruyn, Hugo}}, issn = {{1756-2406}}, journal = {{EUROPEAN JOURNAL OF ORAL IMPLANTOLOGY}}, keywords = {{biologic width,southern implant,platform switching,crestal bone loss,RADIOGRAPHIC EVALUATION,CRESTAL BONE CHANGES,dental implant,SINGLE-TOOTH REPLACEMENTS,FINITE-ELEMENT-ANALYSIS,BIOLOGIC WIDTH,BACTERIAL-COLONIZATION,HISTOMETRIC EVALUATION,SUBMERGED IMPLANTS,DENTAL IMPLANTS,TITANIUM IMPLANTS}}, language = {{eng}}, number = {{3}}, pages = {{253--262}}, title = {{A within-implant comparison to evaluate the concept of platform switching: a randomised controlled trial}}, volume = {{5}}, year = {{2012}}, }