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Biomedical subjects

J B McLain

Publications and source records attributed to J B McLain.

7 recordsLinked to original sources
PubMed1985

The incidence and severity of complications and pain following periodontal surgery.

This study examines the incidence and severity of postoperative complications and pain in 304 consecutive periodontal surgical cases. Comparisons were made between plastic soft tissue surgery, osseous surgery and pure mucogingival procedures. Multivariable analysis was used to ascertain significant associations of numerous factors to complications and pain. Postoperative complications were rated as moderate or severe in only 5.5% of the cases. Although the total postoperative complications were minimal, regression analysis revealed osseous surgery to be three times more likely than pure mucogingival surgery to cause complications of bleeding, infection, swelling or adverse tissue changes. Minimal or no postoperative pain was reported by 51.3% of the patients. Pure mucogingival surgery was significantly related to pain and was 3.5 times more likely to cause pain than osseous surgery and 6 times more likely than plastic soft tissue surgery. The duration of surgery was statistically significant for both complications and pain. The overall results of the study indicate the risks of undergoing periodontal surgery, in terms of postoperative complications and pain, are minimal.

Adolescent↗
PubMed1983

Transverse periosteal sectioning and femur growth in the rat.

Circumferential cuts through the periosteal covering of long bones have been demonstrated to transiently increase epiphyseal growth. This effect appears to be independent of vascular changes accompanying surgery and has been hypothesized to relate to releasing tension in the periosteal envelope. This study was designed to address problems of previous investigations by controlling for the effects of the surgical procedure and by using regression analyses to analyze intra- and interanimal variations in the length and proportionality of the femur in experimental, sham, and control Sprague-Dawley male rat littermates. Experimental animals received circumferential periosteal sectioning of the right femur and no operation to the left limb. A sham operation without periosteal sectioning was performed on the right femur in the sham group. Right to left differences were analyzed using two multiple regression models; one involved three absolute length measurements as the dependent variables, while the other used the three ratios of these length measurements as the dependent variables. The ratio measures were utilized to reflect changes in bone proportionality. Circumferential periosteal section was followed by an alteration in the shape of rat femurs at 2 weeks postsurgery with a slight retardation of the length dimension from medial epicondyle to head of the femur and an overgrowth of the length dimension from the lateral epicondyle to the greater trochanter. The sham procedure produced a proportional decrease in all length measurements. The experimental procedure was also associated with surface bone apposition at the site of section. At 3 weeks postsurgery, normalization of bony contours between sham, experimental, and control groups had occurred; however, there were still some statistically significant decreases of length dimensions in the sham and experimental groups. In the experimental group the length measurement involving the weight-bearing head of the femur remained reduced at 3 weeks postsurgery. It is hypothesized that the functional demands of the long bone play an important role in the effect of periosteal regulation on growth. In situations where a normal tensive force is exerted on the bone, the periosteal envelope will act to restrain epiphyseal growth. When the bone is under a normal compressive force the release of periosteal tension is not a quantitatively significant stimulus to epiphyseal growth and the effects of surgical intervention and muscle trauma will play a more important role in the growth response of the epiphyses.

Animals↗
PubMed1983

Adjunctive orthodontic therapy in the treatment of juvenile periodontitis: report of a case and review of the literature.

Historically, the patient with juvenile periodontitis (periodontosis) presented as somewhat of an unknown entity to the orthodontist. With uncertainties concerning etiology still present, the orthodontist may be hesitant to undertake orthodontic treatment for the juvenile periodontitis patient. The literature pertaining to proposed etiologic factors and treatment modalities for juvenile periodontitis is briefly reviewed. Current evidence indicates that juvenile periodontitis patients have a compromised host response which allows an exaggerated susceptibility to certain gram-negative organisms. The disease is characterized by rapidly progressing bone loss, which is not associated with marked local irritation or gingival inflammation. Early diagnosis and conservative periodontal treatment have demonstrated good results. However, cases of advanced lesions or those cases that also involve malocclusion and potential occlusal traumatism may benefit from adjunctive orthodontic therapy. Successful management of a case involving multiple tooth loss along with a moderate degree of malocclusion is presented, with emphasis on the coordination of periodontic, orthodontic, and prosthodontic care. Orthodontic movement of teeth into previously affected areas was quite successful after a short healing period following extractions. A suggested protocol for the combined orthodontic, periodontic, and fixed prosthodontic management of the juvenile periodontitis patient is presented. Once the disease process has been arrested, the prognosis of each tooth is evaluated and possible rehabilitations, including orthodontic treatment and fixed prostheses, are planned. Periodontal evaluations are scheduled concurrently with orthodontic appointments to monitor the condition as tooth movement occurs.

Child↗
PubMed1983

Research biases.

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Humans↗