{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T01:37:37Z","timestamp":1747186657529,"version":"3.40.5"},"reference-count":28,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2024,3,12]],"date-time":"2024-03-12T00:00:00Z","timestamp":1710201600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Prosthodontics"],"published-print":{"date-parts":[[2024,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>The purpose of this study was to evaluate and determine clinical outcomes and survival rates of straight and extended length subcrestal angulated (ELSA) implants (20\u201324\u00a0mm lengths) placed for immediate (up to 72\u00a0h post\u2010operative) or delayed rehabilitation (4 months post\u2010operative) of severely atrophic maxillae. Prosthetic treatment consisted of interim and definitive implant\u2010supported fixed implant\u2010supported prostheses with up to 3 years of function.<\/jats:p><\/jats:sec><jats:sec><jats:title>Materials and Methods<\/jats:title><jats:p>A retrospective analysis was conducted of 38 patients (five dropped out; final total was 33), treated between 2017 and 2019 in a private practice. Extended length subcrestal angulated (ELSA) implants and conventional endosseous straight implants (Southern Implants, Irene, South Africa) with (fixed) full arch prostheses were used to restore patients with edentulous maxillae immediately (within 72\u00a0hs) or delayed (4 months).\u00a0 ELSA implants have subcrestal angulations of 24\u00b0 and 36\u00b0 of the restorative platforms, external hexagon crestal anti\u2010rotation abutment connections, and lengths between 18 and 26\u00a0mm. Implant loading was determined by implant insertion torque values (as determined on the surgical units); 120\u00a0Ncm was the threshold level for immediate loading. Clinical and radiographic examinations were done that recorded the clinical outcomes of implants and prostheses. SPSS was used to process the data.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Thirty\u2010three patients and 187 implants were included with follow\u2010up periods of at least 12 months (range 12\u201336 months). The mean age of the study population was 62.6 \u00b1 8.4 years old (at the time of implant placement). Thirty\u2010three patients (86.8%) were followed for 12 months; 13 patients (39.4%) were followed for 24\u201335 months; 9 patients (27.3%) were followed for 36 months. In total, 13 implants in six patients failed secondary to sinus infections. Mean bone levels (MBLs) were respectively: 0.88\u00a0\u00b1\u00a02.12\u00a0mm at loading, \u20131.53\u00a0\u00b1\u00a02.03\u00a0mm at 12 months, \u20132.26\u00a0\u00b1\u00a01.45\u00a0mm at 24 months, and \u20132.54\u00a0\u00b1\u00a01.46\u00a0mm at 36 months. The ELSA implants showed significantly lower (<jats:italic>p =<\/jats:italic> 0.014) MBL at 36 months than did the conventional implants. One hundred thirty\u2010seven implants were placed and loaded within 72\u00a0h; 50 implants were placed and loaded 4 months post placement. The combined implant survival rates were 93.0% at 12 months, 91.1% at 24 months, and 100% at 36 months. The ELSA implants showed significantly lower (<jats:italic>p =<\/jats:italic> 0.014) MBLs at 36 months when compared to the conventional implants.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The results of this retrospective clinical chart review indicated that the use of ELSA implants placed into anterior maxillae and nasal crests with accentuated distal tilts (&gt;30\u00b0) and simultaneous sinus augmentation provided favorable outcomes for prosthetic rehabilitation in patients with severe atrophic maxillae. ELSA implants placed with simultaneous sinus augmentation are an alternative option to zygomatic implants (ZI) when immediate loading is prescribed. Sinus infections were thought to be the proximate causes of all implant failures. Further long\u2010term clinical studies are warranted with larger patient populations.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jopr.13833","type":"journal-article","created":{"date-parts":[[2024,3,12]],"date-time":"2024-03-12T10:58:37Z","timestamp":1710241117000},"page":"541-549","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Immediate rehabilitation of severely atrophic maxillae using conventional and extended length subcrestal angulated (ELSA) implants: A retrospective analysis of 187 implants in 33 patients with up to three years of function"],"prefix":"10.1111","volume":"33","author":[{"given":"Michael","family":"Zaninovich","sequence":"first","affiliation":[{"name":"Aria Dental Specialist Implant Centre  Perth Western Australia Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8128-9162","authenticated-orcid":false,"given":"Carl","family":"Drago","sequence":"additional","affiliation":[{"name":"Greenbrook Dental Group  Brookfield Wisconsin USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2024,3,12]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prosdent.2013.12.023"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2010.05.082"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2014.02.006"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2011.03.045"},{"key":"e_1_2_8_6_1","first-page":"39","article-title":"Immediately loaded zygomatic implants: a 5\u2010year prospective study","volume":"6","author":"Dav\u00f3 R","year":"2013","journal-title":"Eur J Oral Implantol"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.3665"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0901-5027(88)80047-X"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.joms.2007.06.687"},{"key":"e_1_2_8_10_1","first-page":"269","article-title":"A proposed classification for zygomatic implant patients based on the zygoma anatomy guided approach (ZAGA): a cross\u2010sectional survey","volume":"4","author":"Aparicio C","year":"2011","journal-title":"Eur J Oral Implantol"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.prosdent.2014.11.018"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.1177\/08959374990130012301"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.te33"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/10006-023-01159-01.1"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40729\u2010023\u201000478\u2010y"},{"key":"e_1_2_8_16_1","first-page":"291","article-title":"Clinical guidelines for rehabilitation of the severely atrophic maxilla using extended\u2010length subcrestal angulated implants and modified trans\u2010sinus nasal protocol: a case report","volume":"13","author":"Zaninovich M","year":"2020","journal-title":"Int J Oral Implantol (Berl)"},{"key":"e_1_2_8_17_1","doi-asserted-by":"publisher","DOI":"10.1111\/jerd.12449"},{"key":"e_1_2_8_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0901-5027(05)80711-8"},{"key":"e_1_2_8_19_1","doi-asserted-by":"publisher","DOI":"10.1902\/annals.2000.5.1.157"},{"key":"e_1_2_8_20_1","first-page":"848","article-title":"Complications of dental implants: identification, frequency, and associated risk factors","volume":"6","author":"McDermott N","year":"2003","journal-title":"Int J Oral Maxillofac Implants"},{"key":"e_1_2_8_21_1","doi-asserted-by":"publisher","DOI":"10.1902\/annals.2000.5.1.79"},{"key":"e_1_2_8_22_1","doi-asserted-by":"publisher","DOI":"10.11607\/jomi.8196"},{"key":"e_1_2_8_23_1","doi-asserted-by":"publisher","DOI":"10.1097\/SCS.0000000000003204"},{"key":"e_1_2_8_24_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1708-8208.2005.tb00060.x"},{"key":"e_1_2_8_25_1","first-page":"73","article-title":"Rehabilitation of patients with severely resorbed maxillae by means of implants with or without bone grafts. 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