A study on the periodontal status of second molar adjacent third molar

Lee, Hae-Doo; Hong, Kiseok; Chung, Chin-Hyung; Lim, Sung-Bin

doi:10.5051/jkape.2006.36.2.489

Cited by 1 publication

(1 citation statement)

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“…Impacted M3 often causes suppurative inflammation such as chronic periodontitis and odontogenic cysts [ 1 ]. In addition, when M3 is extracted, bone absorption, periodontal pocket formation, cementum exposure, and gingival recession may occur in the adjacent second molar [ 8 ]. Several studies comparing groups with and without M3 extraction have found significant periodontal tissue destruction at the distal aspect of M2, including increase in probing depth and radiographic alveolar bone loss [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Spontaneous bone regeneration after surgical extraction of a horizontally impacted mandibular third molar: a retrospective panoramic radiograph analysis

Kim

Nguyen

et al. 2019

Maxillofac Plast Reconstr Surg

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BackgroundThe mandibular third molar (M3) is typically the last permanent tooth to erupt because of insufficient space and thick soft tissues covering its surface. Problems such as alveolar bone loss, development of a periodontal pocket, exposure of cementum, gingival recession, and dental caries can be found in the adjacent second molars (M2) following M3 extraction. The specific aims of the study were to assess the amount and rate of bone regeneration on the distal surface of M2 and to evaluate the aspects of bone regeneration in terms of varying degree of impaction.MethodsFour series of panoramic radiographic images were obtained from the selected cases, including images from the first visit, immediately after extraction, 6 weeks, and 6 months after extraction. ImageJ software® (NIH, USA) was used to measure linear distance from the region of interest to the distal root of the adjacent M2. Radiographic infrabony defect (RID) values were calculated from the measured radiographic bone height and cementoenamel junction with distortion compensation. Repeated measures of analysis of variance and one-way analysis of variance were conducted to analyze the statistical significant difference between RID and time, and a Spearman correlation test was conducted to assess the relationship between Pederson’s difficulty index (DI) and RID.ResultsA large RID (> 6 mm) can be reduced gradually and consistently over time. More than half of the samples recovered nearly to their normal healthy condition (RID ≤ 3 mm) by the 6-month follow-up. DI affected the first 6 weeks of post-extraction period and only showed a significant positive correlation with respect to the difference between baseline and final RID.ConclusionsAdditional treatments on M2 for a minimum of 6 months after an M3 extraction could be recommended. Although DI may affect bone regeneration during the early healing period, further study is required to elucidate any possible factors associated with the healing process. The DI does not cause any long-term adverse effects on bone regeneration after surgical extraction.

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Section: Introductionmentioning

confidence: 99%