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Radiographic data assessed baseline ridge height and width in variable sites. Virtual implant planning with 4.1\/4.8\u00a0mm diameter, 8\/10\u00a0mm length implants was performed using CBCT. The feasibility of simple implant placement and the need for augmentation during implant therapy were assessed. According to the medical records, the implant therapy modalities for sites that received dental implant treatment were also counted.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Results of virtual implant planning showed that a few sites (6.81%) required staged augmentation for 4.1\u2009\u00d7\u20098\u00a0mm and 4.8\u2009\u00d7\u20098\u00a0mm implants, while 59.16% and 45.55% of the sites were possible for simple implant placement, respectively. For all cases clinically treated with implant therapy, 76.1% received simple implant placement, and 3.15% received staged augmentation. Implant treatment modalities were most influenced by location (maxillary\/mandible) and the baseline buccal and lingual\/palatal bone defects.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>PGI placement is possible in periodontally compromised molars following ARP, and only a few sites require complicated augmentation procedures. Location and baseline buccal and lingual\/palatal bone defects are the influencing factors for implant treatment planning.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1186\/s12903-026-07921-7","type":"journal-article","created":{"date-parts":[[2026,2,18]],"date-time":"2026-02-18T04:15:51Z","timestamp":1771388151000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Virtual and clinical implant placement after ridge preservation in periodontally compromised molars: retrospective study"],"prefix":"10.1186","volume":"26","author":[{"given":"Haoyun","family":"Zhang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiping","family":"Wei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenjie","family":"Hu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tao","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Min","family":"Zhen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liping","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cui","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziyao","family":"Han","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ning","family":"Wei","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kwok-Hung","family":"Chung","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,2,18]]},"reference":[{"issue":"10194","key":"7921_CR1","doi-asserted-by":"publisher","first-page":"249","DOI":"10.1016\/S0140-6736(19)31146-8","volume":"394","author":"MA Peres","year":"2019","unstructured":"Peres MA, Macpherson LMD, Weyant RJ, Daly B, Venturelli R, Mathur MR, et al. 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