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  • 1
    Electronic Resource
    Electronic Resource
    Healing following GTR treatment of bone defects distal to mandibular 2nd molars after surgical removal of impacted 3rd molars (2000)
    Copenhagen : Munksgaard International Publishers
    Journal of clinical periodontology 27 (2000), S. 0 
    Details
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim: The purpose of this study was to study the healing, following guided tissue regeneration (GTR) treatment, of bone defects distal to mandibular 2nd molars (M2s) after surgical removal of impacted mesioangularly or horizontally inclined third molars (M3s) in patients 〈inlineGraphic alt="geqslant R: gt-or-equal, slanted" extraInfo="nonStandardEntity" href="urn:x-wiley:03036979:JCPE270506:ges" location="ges.gif"/〉25 years.Method: 20 patients with bilateral soft tissue impacted M3s were included in the split-mouth study. The 2 sites to be treated in each patient were randomised before the 1st operation as to which would undergo the test procedure and which would be the control site. After surgical removal of M3 at test sites, a resorbable polylactic acid (PLA) barrier was attached to M2 to cover the post-surgical bone defect. The flap was then replaced and sutured to cover the barrier. Control sites underwent the same procedure, as did the test sites, with the exception that no barrier was placed. The clinical examinations performed were oral hygiene pre- and 12 months postoperatively and probing pocket depth 12 months postoperatively. The alveolar bone level (ABL) at the distal surface of the M2, as determined from radiographs taken at suture removal and 12 months postsurgery, was chosen to be the primary response variable.Results: Most bone defects showed healing up to 10%–20% of the tooth length at both test and control sites. 2 test and 2 control sites showed no improvement in the bone level. The mean values of bone healing registered in mm from the cemento-enamel junction (CEJ) were 2.6±2.19 SD and 3.0±2.20 SD for test and control sites, respectively. Different factors affecting the healing result are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-051x.2000.027005325.x
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  • 2
    Electronic Resource
    Electronic Resource
    Healing following GTR treatment of intrabony defects distal to mandibular 2nd molars using resorbable and non-resorbable barriers (2000)
    Copenhagen : Munksgaard International Publishers
    Journal of clinical periodontology 27 (2000), S. 0 
    Details
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims: The objectives of the present, randomised clinical trial were (i) to evaluate the healing of periodontal intrabony defects at the distal aspect of mandibular 2nd molars using a resorbable polylactic acid (PLA) barrier and a non-resorbable polytetrafluoroethylene (e-PTFE) barrier and (ii) to compare the therapeutic effect of the bioresorbable versus the non-resorbable barrier.Method: 19 patients with intrabony defects distal to mandibular 2nd molars 〈inlineGraphic alt="geqslant R: gt-or-equal, slanted" extraInfo="nonStandardEntity" href="urn:x-wiley:03036979:JCPE270507:ges" location="ges.gif"/〉4 mm (on radiographs) were included in the study. The defects all remained 5 years after surgical removal of impacted 3rd molars. Following flap elevation and defect debridement, the defects were randomly covered with, either a resorbable PLA or a non-resorbable e-PTFE barrier. Flaps were repositioned and sutured to completely cover the barriers. Treatment was evaluated clinically after 1 year by measurements of probing depth (PD), probing attachment level (PAL), and probing bone level (PBL) and radiographically by measurements of bone levels on computer digitised images of radiographs taken immediately before and 1 year post-surgery.Results: Both treatments resulted in significant PD reduction, PAL gain, and bone fill. The total PD reduction was 5.3±l.9 mm for the PLA treated sites and 3.7±l.7 mm for the e-PTFE treated sites (p〈0.05). The corresponding values for PAL gain were 4.7±0.7 mm and 3.6±1.7 mm (p〈0.05) and for PBL gain 5.1±1.2 and 3.3±2.0 mm (p〈0.05). Radiographic bone fill averaged 3.4±l.2 for the PLA and 2.0±1.6 mm for the e-PTFE barriers (p〈0.05). Radiographic bone level measurements were significantly smaller than the corresponding clinical measurements, indicating that radiographs tend to underestimate bone fill.Conclusions: GTR treatment of deep intrabony defects distal to mandibular second molars using resorbable PLA barriers resulted in significant PD reduction, PAL gain and bone fill at least equivalent to the results obtained using non-resorbable e-PTFE barriers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1034/j.1600-051x.2000.027005333.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The influence of anatomical, pathophysiological and other factors on periodontal healing after impacted lower third molar surgery A multiple regression analysis (1991)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of clinical periodontology 18 (1991), S. 0 
    Details
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract A multifactorial approach has been used to identify some predictors of postoperative intrabony defects (IBD) on the distal surface of the adjacent second molar (M2) after impacted lower third molar (M3) surgery. The material consisted of 215 lower third molar removals, performed on 144 persons (age range 16–53 years; mean 27.2 years). The postoperative examination took place 2 years after impaction surgery and included both clinical and radiographic variables. Statistically significant (5% significance level) predictors of IBD found in stepwise multiple regression analyses were: (1) preoperative intrabony defect M2 distal; (2) age at the time of surgery; (3) size of contact-area M3/M2; (4) root resorption M2 distal; (5) probing dept distal surface of adjacent first molar postoperatively; (6) pathological follicle M3. The regression model with IBD as regressand produced a total R2 of 0.45. When the regressand was the difference between IBD and the preoperative intrabony defect, the regression analysis explained 62% of the variance (R2=0.62). These regression models explained the variance in terms of the size of the remaining postoperative intrabony defect as well as in terms of periodontal healing after impacted lower third molar surgery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-051X.1991.tb01117.x
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    Paper (German National Licenses)
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