Loss of space and changes in the dental arch after premature loss of the lower primary molar: a longitudinal study.

J Indian Soc Pedod Prev Dent. 2006 Jun;24(2):90-6

Authors: Padma Kumari B, Retnakumari N

The purpose of the study was to evaluate the space changes, dental arch width, arch length and arch perimeter, after the unilateral extraction of lower first primary molar in the mixed dentition period. A longitudinal study was conducted among forty children in the age group of 6-9 years, who reported for extraction of lower first primary molar in the department of Pedodontics, Govt. Dental College, Trivandrum. Study models were made from alginate impression taken before extraction and after extraction at the periodical intervals of two months, four months, six months and eight months. The mesiodistal width of lower first primary molar of the non-extracted side was taken as the control. The results of the study showed statistically significant space loss in the extraction side ( P value < 0.01) and no significant space loss in the control side (P value > 0.05). The rate of loss was greatest in the first four months. The arch width, arch length and arch perimeter had no significant change from initial to eight months follow up. The present study challenges the use of a space maintenance under the circumstances of premature loss of mandibular primary molar for preventing space loss.

PMID: 16823234 [PubMed - indexed for MEDLINE]

Ectopia or concomitant hypohyperdontia? A case report.

J Orthod. 2006 Jun;33(2):71-7

Authors: Bateman G, Mossey PA

This report describes the unusual appearance seen on a panoramic radiograph of an orthodontic patient which the authors argue may represent ectopia or concomitant hypohyperdontia of the mandibular premolar teeth. A literature review describes the frequency of such anomalies in this area from previous studies. The presenting features of the patient and the differential diagnoses are explored. Treatment planning is discussed and treatment carried out in this particular case is detailed. The unusual symmetrical bilateral anomalies in this patient may point to a genetic determinant of tooth germ position and/or movement.

PMID: 16751428 [PubMed - indexed for MEDLINE]

Fixed space maintainers combined with open-face stainless steel crowns.

J Contemp Dent Pract. 2006 May 1;7(2):95-103

Authors: Yilmaz Y, Kocogullari ME, Belduz N

OBJECTIVE: This study investigates the clinical performance of fixed space maintainers placed on seriously damaged abutment teeth. METHODS: Crowns were placed on damaged abutment primary teeth. Fixed space maintainers were prepared by using rectangular wire between the window in the facial surface of the crowns and other abutment teeth and were subsequently bonded with a flowable resin composite. This procedure was introduced clinically, and the cases were observed over a period of twelve months. RESULTS: Twenty-seven fixed space maintainers (25 on lower jaw, two on upper jaw) were included in this study. No clinical failure was recorded in any of the cases in the observation time, and the rate of clinical performance was 100%. CONCLUSION: The study shows the effectiveness of fixed space maintainers combined with stainless steel crowns ("open-face fixed space maintainers") which were placed on primary molar teeth used as abutments in cases with extensive caries and loss of occlusogingival dimension.

PMID: 16685300 [PubMed - indexed for MEDLINE]

An application of a splint purposeful resin-bonded fixed partial denture after orthodontic treatment: a case report.

J Contemp Dent Pract. 2006 Feb 15;7(1):141-9

Authors: Bayda&#x15F; B, Denizoglu S

An adult male patient who had lost his maxillary left central incisor seven years ago in a traffic accident presented with a chief complaint about his unaesthetic appearance associated with the loss of his maxillary left central incisor space, a Class III molar occlusion, and an anterior open bite malocclusion due to tongue-thrust swallowing. Fixed orthodontic treatment was rendered following fan-type expansion of the maxilla. A Maryland bridge as a minimally invasive dentistry approach was used as a retention appliance and the patient's aesthetic appearance was restored.

PMID: 16491157 [PubMed - indexed for MEDLINE]

Clinical pearl In-treatment replacement of missing incisors.

J Orthod. 2005 Sep;32(3):182-4

Authors: Hodge TM

Four methods of in-treatment replacement of missing incisors are described.

PMID: 16170059 [PubMed - indexed for MEDLINE]

An evaluation of survival of space maintainers: a six-year follow-up study.

J Contemp Dent Pract. 2005 Feb 15;6(1):74-84

Authors: Tulunoglu O, Ulusu T, Genç Y

The aim of this study was to evaluate the median survival time of fixed and removable space maintainers related to age groups, gender, and their distribution in upper and lower dental arches. The adherence of patients to a periodic recall program and the success rate of different types of space maintainers related to different arches were also evaluated. This study included 663 patients aged between 4-15 years old that were treated between the years of 1997 and 2002. The patients were categorized into four main groups: lost to follow-up, failed, successful, and censored at the end of study. Three hundred forty-five space maintainers were considered lost to follow-up, 83 were considered failed, 206 successful, and 20 censored-at-end. The overall median survival time of the appliances was 6.51 months. Median survival time was 7.25 months in the 4-6 age group, 6.35 months in the 7-12 age group, and 7.0 months in the 13+ age groups. Median survival time was 5.76 months in girls and 7.11 months in boys. Median survival time of space maintainers was 7.17 months for maxilla and 6.69 months in the mandible. Median survival time was 5.25 months for space maintainers fabricated in both arches.

PMID: 15719079 [PubMed - indexed for MEDLINE]

Management of space problems in the primary and mixed dentitions.

J Am Dent Assoc. 1999 Sep;130(9):1330-9

Authors: Ngan P, Alkire RG, Fields H

BACKGROUND: According to the Third National Health and Nutrition Examination Survey, crowding and irregularity remain a consistent problem for children. Management of space problems continues to play an important role in a dental practice. It also represents an area of major interaction between the primary provider and the specialists. This article attempts to update clinicians on the current knowledge of space management. DESCRIPTION OF CONDITION: Proper management of space in the primary and mixed dentitions can prevent unnecessary loss in arch length. Diagnosing and treating space problems requires an understanding of the etiology of crowding and the development of the dentition to render treatment for the mild, moderate and severe crowding cases. Most crowding problems with less than 4.5 millimeters can be resolved through preservation of the leeway space, regaining space or limited expansion in the late mixed dentition. In cases with 5 to 9 mm of crowding, some can be approached with expansion after thorough diagnosis and treatment planning. Most of these cases will require extraction of permanent teeth to preserve facial esthetics and the integrity of the supporting soft tissue. Serial extraction or guidance of eruption is reserved for treatment of severe tooth-size/arch-size discrepancies. Due to variations in the timing and extraction sequence depending on the diagnosis, serial extraction should be reserved for those who can complete the treatment successfully. CLINICAL IMPLICATIONS: The recommended timing of referring patients with moderate crowding to specialists for treatment is in the late mixed-dentition stage of development. Patients with severe crowding will require earlier evaluation for serial extraction.

PMID: 10492540 [PubMed - indexed for MEDLINE]

Autotransplantation of teeth: is there a role?

Br J Orthod. 1998 Nov;25(4):275-82

Authors: Thomas S, Turner SR, Sandy JR

Autotransplantation of teeth, if carried out successfully, ensures that alveolar bone volume is maintained due to physiological stimulation of the periodontal ligament. Autotransplantation has been carried out for many years, but with varying success rates. As a result, it is seldom regarded as an appropriate treatment option for patients with missing teeth especially with the continued development of osseo-integrated implants. Since placement of osseo-integrated implants in growing alveolar bone is contra-indicated, transplantation of available teeth remains a suitable choice for replacing missing units in the young patient. The role of autotransplantation of teeth in several clinical situations, the clinical techniques involved and factors influencing success of the transplant are discussed. The aim of this paper is to underline the evidence based principles for successful autotransplantation and present the technique as a viable treatment option in present day orthodontic practice.

PMID: 9884778 [PubMed - indexed for MEDLINE]

Dental changes in the mandible during initial Bass appliance therapy.

Eur J Orthod. 1998 Feb;20(1):17-23

Authors: Omblus J, Malmgren O

The aim of this study was to analyse movements of lower molars and incisors during 6 months of Bass appliance therapy and to evaluate the dental arch space attained. The sample consisted of 53 patients with severe Class II, division 1 malocclusions. The analyses were performed on lateral cephalograms and dental casts. Sixteen of the patients were followed for 6 months before treatment. Dental space in the lower jaw decreased 0.7 mm (n = 16) during the observation period and increased 1.8 mm (n = 53) during the 6 months of treatment. The molars moved posteriorly a total of 0.7 and tipped distally 2.4 degrees during treatment. The incisors moved anteriorly 0.3 mm and tipped mesially 0.5 degree.

PMID: 9558761 [PubMed - indexed for MEDLINE]

Orthodontic treatment and diving.

Br J Orthod. 1997 Nov;24(4):346-7

Authors: Hammond J

PMID: 9459041 [PubMed - indexed for MEDLINE]

Re: The use of pressure formed retainers in cases of hypodontia.

Br J Orthod. 1997 Aug;24(3):257-8

Authors: Peden M, McSherry P, Burden D

PMID: 9313922 [PubMed - indexed for MEDLINE]