{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,9]],"date-time":"2026-03-09T13:56:53Z","timestamp":1773064613634,"version":"3.50.1"},"reference-count":20,"publisher":"Springer Science and Business Media LLC","issue":"10","license":[{"start":{"date-parts":[[2025,5,23]],"date-time":"2025-05-23T00:00:00Z","timestamp":1747958400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,5,23]],"date-time":"2025-05-23T00:00:00Z","timestamp":1747958400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Br Dent J"],"published-print":{"date-parts":[[2025,5,23]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    <jats:bold>Background<\/jats:bold>\n                    The application of vertical margins for crown preparations is increasing in popularity but limited long-term clinical outcome data exist.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Aim<\/jats:bold>\n                    To audit clinical outcomes for 73 teeth after vertical preparation for knife-edge zirconia crowns on posterior teeth in general practice.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Methods<\/jats:bold>\n                    In total, 73 posterior teeth had knife-edge zirconia crowns placed after vertical finish line preparation. The outcomes for these teeth were analysed from a retrospective audit of clinical records.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Results<\/jats:bold>\n                    The mean follow-up time was 62 months (SD: 21 months; range: 12-93). Eight teeth experienced complications during the follow-up period, with two of these teeth ultimately being extracted (one due to tooth fracture and one due to caries at the crown margin). The remaining six teeth were still functioning. Three of these had crown replacements, one required re-root canal treatment and two teeth (in the same patient) had unstable periodontitis which worsened since placement of crowns. Only the patient with unstable periodontitis showed any change in alveolar bone height on radiographic follow-up; 68 teeth with radiographic follow-up available showed no changes in alveolar bone levels. The mean bleeding score for the crowned teeth was higher than the mean bleeding score for the control tooth, but this was not statistically significant.\n                  <\/jats:p>\n                  <jats:p>\n                    <jats:bold>Conclusion<\/jats:bold>\n                    This retrospective evaluation has shown favourable outcomes for 71 teeth after vertical preparation for knife-edge crowns. Longer follow-up is needed but the present results show that the technique is a viable procedure with potential advantages.\n                  <\/jats:p>","DOI":"10.1038\/s41415-024-7951-1","type":"journal-article","created":{"date-parts":[[2025,5,23]],"date-time":"2025-05-23T06:24:29Z","timestamp":1747981469000},"page":"807-812","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Six-year analysis of posterior zirconia crowns with vertical margin preparations"],"prefix":"10.1038","volume":"238","author":[{"given":"Jane","family":"Stack","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian","family":"Millar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,5,23]]},"reference":[{"key":"7951_CR6650","unstructured":"UK Government. Adult oral health survey 2021: self-reported health of teeth and gums. Available at https:\/\/www.gov.uk\/government\/statistics\/adult-oral-health-survey-2021\/adult-oral-health-survey-2021-self-reported-health-of-teeth-and-gums (accessed May 2024)."},{"key":"7951_CR6653","unstructured":"NHS Digital. Adult dental health survey 2009. 2010. Available at https:\/\/digital.nhs.uk\/data-and-information\/publications\/statistical\/adult-dental-health-survey (accessed March 2023)."},{"key":"7951_CR6657","doi-asserted-by":"crossref","unstructured":"Lynch C D, Hale R, Chestnutt I G, Wilson N H F. Reasons for placement and replacement of crowns in general dental practice. Br Dent J 2018; 225: 229-234.","DOI":"10.1038\/sj.bdj.2018.541"},{"key":"7951_CR6659","unstructured":"Edelhoff D, Sorensen J A. Tooth structure removal associated with various preparation designs for posterior teeth. Int J Periodontics Restorative Dent 2002; 22: 241-249."},{"key":"7951_CR6661","unstructured":"Evans C D, Wilson P R. The effects of tooth preparation on pressure measured in the pulp chamber: a laboratory study. Int J Prosthodont 1999; 12: 439-443."},{"key":"7951_CR6663","doi-asserted-by":"crossref","unstructured":"A L-Amleh B, Lyons K, Swain M. Clinical trials in zirconia: a systematic review. J Oral Rehabil 2010; 37: 641-652.","DOI":"10.1111\/j.1365-2842.2010.02094.x"},{"key":"7951_CR6666","doi-asserted-by":"crossref","unstructured":"Pardo G I. A full cast restoration design offering superior marginal characteristics. J Prosthet Dent 1982; 48: 539-543.","DOI":"10.1016\/0022-3913(82)90358-4"},{"key":"7951_CR6668","unstructured":"Stack J, Millar B J. Analysis of posterior zirconia crowns with vertical margin preparations. Eur J Prosthodont Restor Dent 2022; 30: 55-64."},{"key":"7951_CR6670","unstructured":"DiFebo G, Carnevale G, Sterrantino S F. Treatment of a case of advanced periodontitis: clinical procedures utilizing the \u2018combined preparation' technique. Int J Periodontics Restorative Dent 1985; 5: 52-62."},{"key":"7951_CR6672","doi-asserted-by":"crossref","unstructured":"Di Febo G, Bedendo A, Bebendo A, Romano F, Cairo F, Carnevale G. Fixed prosthodontic treatment outcomes in the long-term management of patients with periodontal disease: a 20-year follow-up report. Int J Prosthodont 2015; 28: 246-251.","DOI":"10.11607\/ijp.3995"},{"key":"7951_CR6675","doi-asserted-by":"crossref","unstructured":"Gavelis J R, Morency J D, Riley E D, Sozio R B. The effect of various finish line preparations on the marginal seal and occlusal seat of full crown preparations. J Prosthet Dent 1981; 45: 138-145.","DOI":"10.1016\/0022-3913(81)90330-9"},{"key":"7951_CR6678","unstructured":"Loi I, Di Felice A. Biologically oriented preparation technique (BOPT): a new approach for prosthetic restoration of periodontically healthy teeth. Eur J Esthet Dent 2013; 8: 10-23."},{"key":"7951_CR6680","doi-asserted-by":"crossref","unstructured":"Rosner D. Function, placement, and reproduction of bevels for gold castings. J Prosthet Dent 1963; 13: 1160-1166.","DOI":"10.1016\/0022-3913(63)90268-3"},{"key":"7951_CR6682","doi-asserted-by":"crossref","unstructured":"Agust\u00edn-Panadero R, Sol\u00e1-Ru\u00edz M F. Vertical preparation for fixed prosthesis rehabilitation in  the anterior sector. J Prosthet Dent 2015; 114: 474-478.","DOI":"10.1016\/j.prosdent.2015.05.010"},{"key":"7951_CR6684","unstructured":"Magallanes Ramos R, Clark D, Mazza M et al. The shoulderless approach. a new rationale in prosthetic dentistry. Tomorrow Tooth J 2017; 1: 1-29."},{"key":"7951_CR6687","doi-asserted-by":"crossref","unstructured":"Cheung G S P, Lai S C N, Ng R P Y. Fate of vital pulps beneath a metal-ceramic crown or a bridge retainer. Int Endod J 2005; 38: 521-530.","DOI":"10.1111\/j.1365-2591.2005.00982.x"},{"key":"7951_CR6689","doi-asserted-by":"crossref","unstructured":"Poggio C E, Dosoli R, Ercoli C. A retrospective analysis of 102 zirconia single crowns with knife-edge margins. J Prosthet Dent 2012; 107: 316-321.","DOI":"10.1016\/S0022-3913(12)60083-3"},{"key":"7951_CR6691","unstructured":"Schmitt J, Wichmann M, Holst S, Reich S. Restoring severely compromised anterior teeth with zirconia crowns and feather-edged margin preparations: a 3-year follow-up of a prospective clinical trial. Int J Prosthodont 2010; 23: 107-109."},{"key":"7951_CR6693","doi-asserted-by":"crossref","unstructured":"Scutell\u00e0 F, Weinstein T, Zucchelli G, Testori T, Del Fabbro M A. Retrospective periodontal assessment of 137 teeth after featheredge preparation and gingittage. Int J Periodontics Restorative Dent 2017; 37: 791-800.","DOI":"10.11607\/prd.3274"},{"key":"7951_CR6695","doi-asserted-by":"crossref","unstructured":"Castelo-Baz P, Freire-\u00c1lvarez-Bl\u00e1zquez M, Pereira-Lores P et al. Vertical preparation: a new technique for analogical and digital impressions. J Clin Exp Dent 2023; DOI: 10.4317\/jced.60169.","DOI":"10.4317\/jced.60169"}],"container-title":["British Dental Journal"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.nature.com\/articles\/s41415-024-7951-1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.nature.com\/articles\/s41415-024-7951-1","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.nature.com\/articles\/s41415-024-7951-1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T16:54:08Z","timestamp":1762448048000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.nature.com\/articles\/s41415-024-7951-1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5,23]]},"references-count":20,"journal-issue":{"issue":"10","published-print":{"date-parts":[[2025,5,23]]}},"alternative-id":["7951"],"URL":"https:\/\/doi.org\/10.1038\/s41415-024-7951-1","relation":{},"ISSN":["0007-0610","1476-5373"],"issn-type":[{"value":"0007-0610","type":"print"},{"value":"1476-5373","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,5,23]]},"assertion":[{"value":"23 June 2024","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"15 August 2024","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"23 May 2025","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"The authors declare no conflicts of interest. Ethical approval and consent was not required as patients were not contacted in any way for this audit of clinical notes to assess past treatment.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics declaration"}}]}}