A Retrospective Analysis of Mandibular Bone Height Changes Associated with 81 Screw-Retained Implant-Supported Prostheses with Distal Cantilevers: A Long-Term Follow-up Analysis
| Autor: | Vicki C. Petropoulos, Glenn J. Wolfinger, Stephen F. Balshi, Matilda Dhima, Thomas J. Balshi |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Adult
Male Time Factors Long term follow up Radiography Bone Screws Alveolar Bone Loss Dentistry Mandible Sex Factors Osteogenesis Radiography Panoramic Humans Medicine Bone height Aged Retrospective Studies Dental Implants Bone growth Analysis of Variance business.industry Dental prosthesis Retrospective cohort study Organ Size General Medicine Middle Aged Female Dental Prosthesis Implant-Supported Implant Oral Surgery business Implant supported Follow-Up Studies |
| Zdroj: | The International Journal of Oral & Maxillofacial Implants. 28:854-859 |
| ISSN: | 0882-2786 |
| DOI: | 10.11607/jomi.2768 |
| Popis: | Purpose The aims of this study were (1) to evaluate long-term changes in bone height beneath mandibular screw-retained implant-supported prostheses with distal cantilevers and (2) to determine whether the reversal of residual ridge resorption in the posterior mandible is temporary or continues over the long term. Materials and methods Panoramic radiographs, obtained at surgery and at two follow-up visits, of 81 patients rehabilitated with mandibular screw-retained implant-supported prostheses with distal cantilevers supported by four, five, or six implants were followed for 5 to 19 years (overall mean follow-up, 9.00 years. Changes and trends in bone height adjacent to the most distal implant were evaluated between each follow up visit as well as from time of surgery (baseline) to the final visit using two-way analysis of variance, a two-sample t test, and piecewise linear regression. Results Average bone height distal to the distal most implant at placement was 10.34 ± 6.87 mm. From baseline to the first follow-up exam, a mean bone gain of 0.68 mm was noticed, and a mean gain of 0.26 mm was observed from baseline to the second follow-up exam. A statistically significant bone gain (0.92 mm) was noticed in women (n = 49) between the first and second exams, compared to 0.33 mm in men (n = 32). Individuals experienced both bone gain and loss during the study, with an overall gain. Patients with lower initial bone height experienced greater growth, but this was not statistically significant. Conclusion Bone growth is associated with mandibular screw-retained implant-supported prostheses with distal cantilevers, and both bone loss and bone growth may occur in the same patient over time. Within the diverse population of this study, women experienced 2.5 times more gain in bone height than men. No correlation could be established between initial bone height and overall bone height changes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|