Ming-Hung Lin1, Lian-Ping Mau2, David L Cochran3, Yi-Shing Shieh4, Po-Hsien Huang5, Ren-Yeong Huang6. 1. Department of Periodontology, School of Dentistry, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan. 2. Department of Periodontics, Chi Mei Medical Center, Tainan, Taiwan. 3. Department of Periodontics, The University of Texas Health Science Center at San Antonio, San Antonio, TX, United States. 4. Department of Oral Diagnosis and Pathology, School of Dentistry, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan. 5. Department of Dentistry, Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan. 6. Department of Periodontology, School of Dentistry, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan. Electronic address: ndmcandy@ndmctsgh.edu.tw.
Abstract
OBJECTIVES: To investigate the prevalence and morphological parameters of lingual concavity, and whether these factors are related to a higher risk of inferior alveolar nerve (IAN) injury when performing an immediate implant surgery in posterior mandible region. METHODS: The CBCT images from 237 subjects (1008 teeth) were analysed the shape of the mandibles (C, P, U type), dimensional parameters of lingual concavity (angle, height, depth), and its relation to inferior alveolar canal (IAC) (A, B, C zone), RAC (distance from root apex to IAC) and probability of IAN injury. Multiple logistic regression modelling to determine the odds ratio of variables that made an important contribution to the probability of IAN injury and to adjust for confounding variables. RESULTS: The U type ridge (46.7%) and the most concave point located at C zone (48.8%) are most prevalent in this region. The mandibular second molar presents highest risk for IAN injury than other tooth type (p<0.001), which were 3.82 times to occur IAN injury than the mandibular second premolar. The concave point located at A zone and B zone were 7.82 and 3.52 times than C zone to have IAN damage, respectively. The probability of IAN injury will reduce 26% for every 1mm increase in RAC (p<0.001). CONCLUSIONS: The tooth type, morphological features of lingual concavities, and RAC are associated with risks of IAN injury during immediate implant placement. CLINICAL SIGNIFICANCE: Pre-surgical mapping of the IAC and identification of its proximity relative to the lingual concavity in the posterior mandible regions may avoid unpleasant complications, specifically when performing immediate implant procedures. Crown
OBJECTIVES: To investigate the prevalence and morphological parameters of lingual concavity, and whether these factors are related to a higher risk of inferior alveolar nerve (IAN) injury when performing an immediate implant surgery in posterior mandible region. METHODS: The CBCT images from 237 subjects (1008 teeth) were analysed the shape of the mandibles (C, P, U type), dimensional parameters of lingual concavity (angle, height, depth), and its relation to inferior alveolar canal (IAC) (A, B, C zone), RAC (distance from root apex to IAC) and probability of IAN injury. Multiple logistic regression modelling to determine the odds ratio of variables that made an important contribution to the probability of IAN injury and to adjust for confounding variables. RESULTS: The U type ridge (46.7%) and the most concave point located at C zone (48.8%) are most prevalent in this region. The mandibular second molar presents highest risk for IAN injury than other tooth type (p<0.001), which were 3.82 times to occur IAN injury than the mandibular second premolar. The concave point located at A zone and B zone were 7.82 and 3.52 times than C zone to have IAN damage, respectively. The probability of IAN injury will reduce 26% for every 1mm increase in RAC (p<0.001). CONCLUSIONS: The tooth type, morphological features of lingual concavities, and RAC are associated with risks of IAN injury during immediate implant placement. CLINICAL SIGNIFICANCE: Pre-surgical mapping of the IAC and identification of its proximity relative to the lingual concavity in the posterior mandible regions may avoid unpleasant complications, specifically when performing immediate implant procedures. Crown
Authors: Gilberto Sammartino; Juan Carlos Prados-Frutos; Francesco Riccitiello; Pietro Felice; Vincenzo Cerone; Roberta Gasparro; Hom-Lay Wang Journal: Biomed Res Int Date: 2016-05-12 Impact factor: 3.411
Authors: Mohammed G Sghaireen; Kumar Chandan Srivastava; Deepti Shrivastava; Kiran Kumar Ganji; Santosh R Patil; Anas Abuonq; Mohammed Assayed Mousa; Najla Dar-Odeh; Ghazi M Sghaireen; Mohammad Amjad Kamal; Mohammad Khursheed Alam Journal: Diagnostics (Basel) Date: 2020-06-14